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Date: Wed, 25 Jul 2012 13:49:37 -0700
From: jim s
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
text/plain; charset=windows-1252; format=flowed
Mr Rainbow dropped mention that he had a problem figuring out how the
batteries and AC power module worked.
I had forgotten that Grid had the either battery or power supply design,
and only caught it. I tried to explain that so Rainbow knows he may not
even have a battery pack but only a Grid and a switching power supply.
Hopefully he is digesting all this and will get a working Grid, though
perhaps one w/o battery operation capability.
thanks for the assists to this thread about the battery / power supply
setup.
My three Grids are deeply buried in storage, and I don't even know if
they are the same units we are discussing and could not see the power
supply setup first hand.
Jim
On 7/25/2012 10:41 AM, robert wrote:
>
> grid 1500 batteries are made of plastic. the power supply modules are
> metal.
Date: Wed, 25 Jul 2012 18:24:17 -0400
From: "Len.C"
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
text/plain; charset=ISO-8859-1; format=flowed
Mine 1520 or whatever it is in on the shelf came with a plastic battery
case and a chromed up power supply.
On 7/25/2012 12:29 PM, Tom Rutherford wrote:
>
> My GRiD 1520 has a switching power supply that slides into the battery
> compartment. I didn't get a battery (or anything else, really) with the
> computer. But, if the computer housing is magnesium or a magnesium alloy,
> then it does stand to reason that the battery pack might be, too.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
> ----- Original Message -----
> From: "jim s" <jws@... <mailto:jws%40jwsss.com>>
> To: <RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>>
> Sent: Tuesday, July 24, 2012 1:07 PM
> Subject: Re: [RuGRiD-Laptop] Re: one more attempt
>
> > Since I don't have such and thought it was plastic, and it is magnesium,
> > the working of the metal presents a fire hazard.
> >
> > Be very careful working magnesium. I was going to suggest using a
> > dremel tool to cut it open, but that is out. I wouldn't even drill it.
> >
> > About the only safe work you have magnesium is pressure (cutting with an
> > arbor press or shear) or the knife. Other than that find some machinest
> > who knows how to work it.
> >
> > I see why the battery guys rejected you. They can work hard plastic all
> > day long, but not magnesium metal.
> >
> > You might see if you have any contacts or local light machine works with
> > someone who might give an idea on how to work the thing and cut it open,
> > but I'm sorry, nowhere did you mention we were working metal. the
> > corrosion risk is way higher too, with alkali leakage onto magnesium
> > very bad.
> >
> > Are you sure this box you are working has any batteries?
> >
> > I'm not sure, but recall that Grid had a unique system of interchanging
> > power sources, and not combining batteries and AC. There were a
> > multitude of units on the surplus market shaped like a small grid
> > battery pack for a long time out here which were AC units only. You pop
> > out the battery and put in this unit and plug it into the wall. IIRC
> > that model had two battery locations, and you put one of the battery
> > packs in one side, and a power supply in the other one, and you could
> > charge a battery. Or if you were totally mobile you had a battery in
> > each.
> >
> > Another one must have had a battery charging station, since you could
> > only put in either battery or PS.
> >
> > I apologize to the other list members if all of this was explained
> > previously. the light bulb just went on for me here, since I was
> > working from memory.
> >
> > Jim
> >
> > On 7/24/2012 1:43 AM, Rainbow wrote:
> >> It's possible to try whacking the battery pack on the side, but
> there are
> >> risks to irreparable damage to the battery pack itself, despite the
> fact
> >> that it's made out of magnesium.
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
>
Date: Thu, 26 Jul 2012 12:14:20 -0000
From: "Androgenoide"
Subject: Re: one more attempt
A somewhat more common arrangement for rapid charge batteries is for the third lead to go to a temperature sensor. The charger hits the battery with a very high current until the temperature starts to rise and then backs off to a trickle.
--- In RuGRiD-Laptop@yahoogroups.com, robert <dcat4955@...> wrote:
>
> wow...
>
> some misinformation floating here...
>
> the yellow lead is more than likely a sense lead. commercial radios do this
> for their battery packs. the pack is charged as a whole but only one cell
> is monitored. when that one cell reached its fully charged voltage the
> charger cuts out. its a lousy way to do things because the whole pack is
> charged according to the health of that one cell. thats how it was commonly
> done in the NiCad days though.
>
> you can solder your own packs together. YOUR skill will determine whether
> or not you can do it. this is why cells with solder tabs are sold for
> people making custom packs. kids into R/C cars do it all the time and they
> are pulling serious amps from their packs. you'll need a real solder gun of
> like 150-200w. a puny 30w pencil tip iron wont cut it.
>
> cell polarity can sometimes be hard to visually determine due to odd cell
> construction. harbor freight, northern tool, or any of those chinese toll
> vendors generally have cheap digital meters for under $5 that are more than
> adequate for figuring out which end is positive on a battery.
>
> getting the batteries open can be daunting but there's tricks. most
> computer packs are sealed (no screws). place battery in vise with seam
> running horizontally and slowly tighten down on it. your waiting for pops
> in the plastic case. once you get one, loosen the vise and turn the pack
> and crunch from another angle till you get another POP! eventually you'll
> be able to work a screwdriver into the seam and use it to work the plastic
> case open.
>
> resealing the case will require some crazy glue and fixing the case seams
> you mucked up from the screwdriver.
>
> yes, it can be done. i've done it. is it for the un-brave, faint hearted,
> or unskilled? no. if you dont have a hint of McGuyver in your soul you're
> better off paying an arm and a leg and letting some place like batteries
> plus do it for you.
>
Date: Thu, 26 Jul 2012 13:21:46 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
text/plain; charset="iso-8859-1"
I can't remember if my power supply is chromed up or just bare metal. It's a big ol' thing, though, as low-current switchers go. But, it was built probably 20+ years ago, so things weren't as miniaturized back then.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: Len.C
To: RuGRiD-Laptop@yahoogroups.com
Sent: Wednesday, July 25, 2012 6:24 PM
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
Mine 1520 or whatever it is in on the shelf came with a plastic battery case and a chromed up power supply.
On 7/25/2012 12:29 PM, Tom Rutherford wrote:
My GRiD 1520 has a switching power supply that slides into the battery
compartment. I didn't get a battery (or anything else, really) with the
computer. But, if the computer housing is magnesium or a magnesium alloy,
then it does stand to reason that the battery pack might be, too.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "jim s" <jws@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Tuesday, July 24, 2012 1:07 PM
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
> Since I don't have such and thought it was plastic, and it is magnesium,
> the working of the metal presents a fire hazard.
>
> Be very careful working magnesium. I was going to suggest using a
> dremel tool to cut it open, but that is out. I wouldn't even drill it.
>
> About the only safe work you have magnesium is pressure (cutting with an
> arbor press or shear) or the knife. Other than that find some machinest
> who knows how to work it.
>
> I see why the battery guys rejected you. They can work hard plastic all
> day long, but not magnesium metal.
>
> You might see if you have any contacts or local light machine works with
> someone who might give an idea on how to work the thing and cut it open,
> but I'm sorry, nowhere did you mention we were working metal. the
> corrosion risk is way higher too, with alkali leakage onto magnesium
> very bad.
>
> Are you sure this box you are working has any batteries?
>
> I'm not sure, but recall that Grid had a unique system of interchanging
> power sources, and not combining batteries and AC. There were a
> multitude of units on the surplus market shaped like a small grid
> battery pack for a long time out here which were AC units only. You pop
> out the battery and put in this unit and plug it into the wall. IIRC
> that model had two battery locations, and you put one of the battery
> packs in one side, and a power supply in the other one, and you could
> charge a battery. Or if you were totally mobile you had a battery in
> each.
>
> Another one must have had a battery charging station, since you could
> only put in either battery or PS.
>
> I apologize to the other list members if all of this was explained
> previously. the light bulb just went on for me here, since I was
> working from memory.
>
> Jim
>
> On 7/24/2012 1:43 AM, Rainbow wrote:
>> It's possible to try whacking the battery pack on the side, but there are
>> risks to irreparable damage to the battery pack itself, despite the fact
>> that it's made out of magnesium.
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Sat, 28 Jul 2012 18:51:53 -0400
From: "Len.C"
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
text/plain; charset=ISO-8859-1; format=flowed
You will find that the cells are not soldered to each other but spot
welded. One of the reason you will need to find a place that can
rebuilt it for you. Ya you could solder them but I doubt you could do a
good enough job so they would fit back into the case. As most people
including myself have learned, you get one too hot and its out to
lunch. You could plug the vent hole in one and not know it. Plug that
into your grid and then charge it and when that one lets go kiss the
grid goodbye. You may also find, unless the pack is marked NiCad that
they are not NiCad cells in there, and if they aren't then they explode
even better than NiCads.
When I fist messed with batteries in my early teens, I was given some
new D cells, they didn't have the tit on the positive end so I put some
solder on them, never overheated them but managed to cover up a vent
hole. Stuck them in a 4 cell charger and went to bed, all was fine in
the morning when I left for school. I came home and was like WTF! The
charger was destroyed, I never did find it all. 3 of the cells where on
the floor and the 4th one was well, I found the outside case of it, well
part of it and wasn't able to find the rest of it. Even when I moved
out and cleared everything out of the room I still didn't find the rest
of it.
You have been given names of places to send it to. You local yahoos
well you know what they know which isn't much. But that doesn't mean
that some other place can't rebuild it.
I don't know where you get your ideas from. If it works now or did work
before the pack died then after a rebuild there is no reason it should
not work.
Why would grid want to continue to sell that model or support over the
last 20 years?
I have never seen a battery pack made out of magnesium, are you sure
that its not plastic?
On 7/24/2012 4:43 AM, Rainbow wrote:
>
> Ouch that's not good. Unfortunately, trying to find ways to take the
> battery apart is the only viable option.
>
> Sadly, it is nearly impossible to even find someone who is willing to
> take the battery apart. The battery pack itself is sealed so tight,
> there is no way to take the battery apart without a high risk of
> breaking it and there will be absolutely no assurance that the rugged
> tablet PC will continue to work as is once the battery pack is
> rebuilt/repaired.
>
> GRiD Computer Systems built that tablet PC that way and since they're
> out of business, the product hasn't been sold or supported by GRiD for
> nearly two decades now.
>
> It's possible to try whacking the battery pack on the side, but there
> are risks to irreparable damage to the battery pack itself, despite
> the fact that it's made out of magnesium.
>
> > I "AssuUme" it's red yellow black ..and yeah red-positive
> black-negative I Guess yellow-ground?
>
> That's what I might be thinking, but I will never know until there are
> ways to get the battery pack open and replacing the dead cells.
>
> > (other people here'd know better..AND might be yelling at their
> computer screens right now yEAH Yeah i know i know..hey i build
> animatronics and displays, scenics murals robots but have been run so
> ragged with lack of work in philadelphia that my electronics side
> never got enough development time so now i'm the quick and dirty and
> duct-tape kinda guy)
>
> > yeah I don't know how common that was (iS?) but I know IBM had it
> like that on their powerbooks which IS a good way to foRce people to
> keep the battery's charged (AND might even act as a buffer in case
> there's a jolt..it'll jolt the battery but not the pc itself)..BUT
> yeah once the battery went bad it just seems like a MEAN thing to do
> to people!
>
> Early IBM PS/note and Thinkpad-based laptops can never be compared to
> the 68030/68040-based Powerbooks. Those 386SX-based notebook computers
> still work as is without the need of the battery, because the battery
> does not hold a charge anymore.
>
> > yeah there's 8 in there..
> > AND woW Was i wrong about the circuit board..
> > I remebered it being simple but naw it's got a couple layers and
> some circuitry AND there's like ?5 wires coming out of the battery
> pack so maybe there's connections to each pair or something?
>
> I too believe that people are wrong about the circuit board, but it's
> the battery pack itself. There are lots of wires that attach to the
> battery pack. If the dead batteries are gonna be replaced, they need
> de-soldiered with a soldiering iron...carefully.
>
> If I can, we're gonna try to take some photos of the battery pack to
> get a better picture of what it looks like.
>
>
Date: Sat, 28 Jul 2012 18:52:00 -0400
From: "Len.C"
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
text/plain; charset=ISO-8859-1; format=flowed
You will find that the cells are not soldered to each other but spot
welded. One of the reason you will need to find a place that can
rebuilt it for you. Ya you could solder them but I doubt you could do a
good enough job so they would fit back into the case. As most people
including myself have learned, you get one too hot and its out to
lunch. You could plug the vent hole in one and not know it. Plug that
into your grid and then charge it and when that one lets go kiss the
grid goodbye. You may also find, unless the pack is marked NiCad that
they are not NiCad cells in there, and if they aren't then they explode
even better than NiCads.
When I fist messed with batteries in my early teens, I was given some
new D cells, they didn't have the tit on the positive end so I put some
solder on them, never overheated them but managed to cover up a vent
hole. Stuck them in a 4 cell charger and went to bed, all was fine in
the morning when I left for school. I came home and was like WTF! The
charger was destroyed, I never did find it all. 3 of the cells where on
the floor and the 4th one was well, I found the outside case of it, well
part of it and wasn't able to find the rest of it. Even when I moved
out and cleared everything out of the room I still didn't find the rest
of it.
You have been given names of places to send it to. You local yahoos
well you know what they know which isn't much. But that doesn't mean
that some other place can't rebuild it.
On 7/24/2012 4:43 AM, Rainbow wrote:
>
> Ouch that's not good. Unfortunately, trying to find ways to take the
> battery apart is the only viable option.
>
> Sadly, it is nearly impossible to even find someone who is willing to
> take the battery apart. The battery pack itself is sealed so tight,
> there is no way to take the battery apart without a high risk of
> breaking it and there will be absolutely no assurance that the rugged
> tablet PC will continue to work as is once the battery pack is
> rebuilt/repaired.
>
> GRiD Computer Systems built that tablet PC that way and since they're
> out of business, the product hasn't been sold or supported by GRiD for
> nearly two decades now.
>
> It's possible to try whacking the battery pack on the side, but there
> are risks to irreparable damage to the battery pack itself, despite
> the fact that it's made out of magnesium.
>
> > I "AssuUme" it's red yellow black ..and yeah red-positive
> black-negative I Guess yellow-ground?
>
> That's what I might be thinking, but I will never know until there are
> ways to get the battery pack open and replacing the dead cells.
>
> > (other people here'd know better..AND might be yelling at their
> computer screens right now yEAH Yeah i know i know..hey i build
> animatronics and displays, scenics murals robots but have been run so
> ragged with lack of work in philadelphia that my electronics side
> never got enough development time so now i'm the quick and dirty and
> duct-tape kinda guy)
>
> > yeah I don't know how common that was (iS?) but I know IBM had it
> like that on their powerbooks which IS a good way to foRce people to
> keep the battery's charged (AND might even act as a buffer in case
> there's a jolt..it'll jolt the battery but not the pc itself)..BUT
> yeah once the battery went bad it just seems like a MEAN thing to do
> to people!
>
> Early IBM PS/note and Thinkpad-based laptops can never be compared to
> the 68030/68040-based Powerbooks. Those 386SX-based notebook computers
> still work as is without the need of the battery, because the battery
> does not hold a charge anymore.
>
> > yeah there's 8 in there..
> > AND woW Was i wrong about the circuit board..
> > I remebered it being simple but naw it's got a couple layers and
> some circuitry AND there's like ?5 wires coming out of the battery
> pack so maybe there's connections to each pair or something?
>
> I too believe that people are wrong about the circuit board, but it's
> the battery pack itself. There are lots of wires that attach to the
> battery pack. If the dead batteries are gonna be replaced, they need
> de-soldiered with a soldiering iron...carefully.
>
> If I can, we're gonna try to take some photos of the battery pack to
> get a better picture of what it looks like.
>
>
Date: Sat, 28 Jul 2012 18:52:06 -0400
From: "Len.C"
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
text/plain; charset=ISO-8859-1; format=flowed
You will find that the cells are not soldered to each other but spot
welded. One of the reason you will need to find a place that can
rebuilt it for you. Ya you could solder them but I doubt you could do a
good enough job so they would fit back into the case. As most people
including myself have learned, you get one too hot and its out to
lunch. You could plug the vent hole in one and not know it. Plug that
into your grid and then charge it and when that one lets go kiss the
grid goodbye. You may also find, unless the pack is marked NiCad that
they are not NiCad cells in there, and if they aren't then they explode
even better than NiCads.
When I fist messed with batteries in my early teens, I was given some
new D cells, they didn't have the tit on the positive end so I put some
solder on them, never overheated them but managed to cover up a vent
hole. Stuck them in a 4 cell charger and went to bed, all was fine in
the morning when I left for school. I came home and was like WTF! The
charger was destroyed, I never did find it all. 3 of the cells where on
the floor and the 4th one was well, I found the outside case of it, well
part of it and wasn't able to find the rest of it. Even when I moved
out and cleared everything out of the room I still didn't find the rest
of it.
You have been giv
On 7/24/2012 4:43 AM, Rainbow wrote:
>
> Ouch that's not good. Unfortunately, trying to find ways to take the
> battery apart is the only viable option.
>
> Sadly, it is nearly impossible to even find someone who is willing to
> take the battery apart. The battery pack itself is sealed so tight,
> there is no way to take the battery apart without a high risk of
> breaking it and there will be absolutely no assurance that the rugged
> tablet PC will continue to work as is once the battery pack is
> rebuilt/repaired.
>
> GRiD Computer Systems built that tablet PC that way and since they're
> out of business, the product hasn't been sold or supported by GRiD for
> nearly two decades now.
>
> It's possible to try whacking the battery pack on the side, but there
> are risks to irreparable damage to the battery pack itself, despite
> the fact that it's made out of magnesium.
>
> > I "AssuUme" it's red yellow black ..and yeah red-positive
> black-negative I Guess yellow-ground?
>
> That's what I might be thinking, but I will never know until there are
> ways to get the battery pack open and replacing the dead cells.
>
> > (other people here'd know better..AND might be yelling at their
> computer screens right now yEAH Yeah i know i know..hey i build
> animatronics and displays, scenics murals robots but have been run so
> ragged with lack of work in philadelphia that my electronics side
> never got enough development time so now i'm the quick and dirty and
> duct-tape kinda guy)
>
> > yeah I don't know how common that was (iS?) but I know IBM had it
> like that on their powerbooks which IS a good way to foRce people to
> keep the battery's charged (AND might even act as a buffer in case
> there's a jolt..it'll jolt the battery but not the pc itself)..BUT
> yeah once the battery went bad it just seems like a MEAN thing to do
> to people!
>
> Early IBM PS/note and Thinkpad-based laptops can never be compared to
> the 68030/68040-based Powerbooks. Those 386SX-based notebook computers
> still work as is without the need of the battery, because the battery
> does not hold a charge anymore.
>
> > yeah there's 8 in there..
> > AND woW Was i wrong about the circuit board..
> > I remebered it being simple but naw it's got a couple layers and
> some circuitry AND there's like ?5 wires coming out of the battery
> pack so maybe there's connections to each pair or something?
>
> I too believe that people are wrong about the circuit board, but it's
> the battery pack itself. There are lots of wires that attach to the
> battery pack. If the dead batteries are gonna be replaced, they need
> de-soldiered with a soldiering iron...carefully.
>
> If I can, we're gonna try to take some photos of the battery pack to
> get a better picture of what it looks like.
>
>
Date: Sat, 28 Jul 2012 16:42:47 -0700
From: jim s
Subject: Re: [RuGRiD-Laptop] Re: one more attempt
I think that the person is dealing with a power supply. The grid
designs included some where you swapped in an AC power supply module
into a compartment which looked like a battery compartment, and in fact
had a battery.
and you're right if the person has a battery pack it most certainly will
need to be rebuilt as any New Old Stock units would probably be useless
by now too, and none would be making and stocking such old units.
On 7/28/2012 3:51 PM, Len.C wrote:
>
>
> Why would grid want to continue to sell that model or support over the
> last 20 years?
>
> I have never seen a battery pack made out of magnesium, are you sure
> that its not plastic?
Date: Sun, 29 Jul 2012 02:55:24 -0000
From: "techtalklive@..."
Subject: Typical 1500 series failure modes?
I am considering tackling the repair of a 1530 that
does not respond to the power switch. The power supply
module measures 16.35v so I think its fine (unfortunately,
that would have been an easy problem isolation!)
So its something internal. I have the service manuals
downloaded but I thought maybe I'd get some pointers form
folks who have already performed cold stone dead diagnosis.
If I don't dive into this FYI this very clean 1530 will
be available for parts/repair!
Thanks in advance,
DC
Date: Sat, 28 Jul 2012 20:24:49 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Typical 1500 series failure modes?
text/plain; charset=iso-8859-1
Hello DC. Welcome to the group!
A "DRT" 1530, eh? (DRT=Dead, Right There) I'm assuming none of the LED's on the motherboard light up, right?
I'm not an expert on the 1530. I'm a lot more familiar with the 1520 and 1550SX. There's no way around it, you're going to have to open the case.
Thinking about it, it may be the 16 volt power supply. Being that it's old, it may fail when a load is placed on it. It might help to test this with another power supply, assuming you have another DC supply to test with.
I don't remember any fuses inside any of the Grids. HHmm...I wonder if someone applied too much voltage to it and an internal componet fried.
Just a thought.
-Shawn
________________________________
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Saturday, July 28, 2012 10:55 PM
Subject: [RuGRiD-Laptop] Typical 1500 series failure modes?
I am considering tackling the repair of a 1530 that
does not respond to the power switch. The power supply
module measures 16.35v so I think its fine (unfortunately,
that would have been an easy problem isolation!)
So its something internal. I have the service manuals
downloaded but I thought maybe I'd get some pointers form
folks who have already performed cold stone dead diagnosis.
If I don't dive into this FYI this very clean 1530 will
be available for parts/repair!
Thanks in advance,
DC
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
http://docs.yahoo.com/info/terms/
Date: Sun, 29 Jul 2012 07:27:14 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Hi, DC
Glad to have you in the group. Shawn is indeed more familiar with the 1520's and 1550x. However, the 1530's have always been more my bag. I have several working models, including the original I bought in 1984. The architecture of the 1520's and 1530's are actually very similar to the point of almost being identical in most of its parts. The diffence of course is the switch from an 8 bit machine to a 16 bit machine albeit in SX form. I've bought a lot of dead machines, mainly for parts, however I have never actually tried and bring a dead one back to life. The main reason is I don't really have the tools or information to do it. I don't believe anyone else here has tried it either.
The service manuals don't really address what to do with a dead machine as the company probably would just replace the motherboard in such a situation. It's a lot easier to do that than try and diagnose the problem on a malfunctioning board. In order for me to properly try and bring a dead machine to life, I would need the full detailed schematic of the motherboard circuitry, and that was something the company never put out, probably because it was a trade secret, adn also unnecessary for the reason I just noted. I would also need the tried and true tools of a variable power supply, signal generator, and oscilloscope to truly tease out the problems in a dead board. The most likely culprit in my mind would be the power supply capacitors in the rectifier bridge at the very back of the board, which likely would go sour with age. But I can't rule out some other anomoly in the control circuitry that would just turn the motherboard on, and thus would simply prevent the board from responding. I might be able to halfway guess some of the circuitry, especially the power supply circuitry, but I would still be guessing.
The problem may be in the video board or the video power supply module, which might prevent the board from even trying to turn on if they were completely bad or missing. HOwwver, I would expect to see at least a flash of light, I would think. I'm not sure to be honest as I've never tried doing that.
I wish I had a better answer for you. Most of the repairs we do on these machines are replacing dead CMOS batteries and dead HDD's thorugh re-engineering of the code on the BIOD chips and burning new ones. Sometimes we deal in upgrading memery even though you cannot find those 1 Mb SIPP's anymore. One or two of us have tried upgradng the CPU to the Cyrix 486, which can be done. Shawn is specifically working on trying find a way to boot a 1520 (and thus 1530 can also be used) from a flash drive. When you look on the motherboard, you can see many little checkpoints of solder, which I think were used for voltage and signal checking on individual motherboards at the factory for quality control. However, we have none of that information or knowledge, as least as far as I know
Restoring a dead machine, therefore, without the right information and equipment I noted, probably would not be possible. But if you actually can do this sort of work, it would be greatly appreciated. Some one would probably have to take a working machine and then check all the appropriate points on the motherboard and record the findings as a way to check a dead motherboard, but we would really need that schematic. Best of luck to you.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
Date: Sun, 29 Jul 2012 17:36:44 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
Getting old things to boot off SD cards is cool... I saw old
macbooks being modified like that in other places. Fun stuff.
The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
So here's what I know:
>From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
I can put a power resister on the supply and see if it holds up.
But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
If I were to take it appart, I'd look for visual signs of a failure.
Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
Any other ideas
Date: Sun, 29 Jul 2012 10:45:16 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=iso-8859-1
I would be very interested in seeing pictures.
Booting from CF or SD would be cool. SD would be really tricky. Thinking it through, you'd have to build some sort of interface to hook the IDE in the Grid to SD. Not impossible, just may not be worth it, in terms of hardware and time.
CF interface is IDE, so it lends itself very nicely to the Grid.
But as others have suggested, Disk On Module would be a better way to go than CF.
I really need to get back to working with Grids. I've got too many projects going on. My latest project is finding a use for my Raspberry Pi. Amazing little machine for $35.
-Shawn
P.S. CF = Compact Flash in case anyone is confused.
________________________________
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Sunday, July 29, 2012 1:36 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
Getting old things to boot off SD cards is cool... I saw old
macbooks being modified like that in other places. Fun stuff.
The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
So here's what I know:
>From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
I can put a power resister on the supply and see if it holds up.
But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
If I were to take it appart, I'd look for visual signs of a failure.
Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
Any other ideas
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
http://docs.yahoo.com/info/terms/
Date: Sun, 29 Jul 2012 18:29:38 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Thanks, DC,
I would also be interested in the unit myself. Concerning the screens, one thing I would point out is that that rear power supply unit, which is separate from the motherboard and behind the disk drives, is allied with and supplies the video screen. These computers used three types of screens; monchrome, LCD, and VGA. Depending on the type of screen, that power supply provides different voltages. so the screen and power supply unit should go together as a rule. You can tell from the video card: Two EPROM sockets means it's monochrome, one socket means LCD, no sockets mean VGA. Like Shawn, I don't really have the time to truly investigate these machines to this level of intensity, or I would go get the equipment myself and do the work. It would really be nice if someone was able to do that work for the group. Pictures would also be great. A functioning hard drive would be in some demand by others here in the group as they are difficult to come by. If you have 1 MB SIPPs in the machine, they would also be very much in demand, though chances are you will only have 256K sticks. Past this though, I don't any other ideas.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
> Getting old things to boot off SD cards is cool... I saw old
> macbooks being modified like that in other places. Fun stuff.
> The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
>
> If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
>
> So here's what I know:
>
> From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
> I can put a power resister on the supply and see if it holds up.
> But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
> If I were to take it appart, I'd look for visual signs of a failure.
> Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
>
> Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
>
> Any other ideas
>
Date: Sun, 29 Jul 2012 19:37:36 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
That was useful! It looks like I should head in the direction of a careful teardown to investigate whats inside regardless of fixing.
I assume I will find tear down info in the manuals...
Thanks so much.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Thanks, DC,
>
> I would also be interested in the unit myself. Concerning the screens, one thing I would point out is that that rear power supply unit, which is separate from the motherboard and behind the disk drives, is allied with and supplies the video screen. These computers used three types of screens; monchrome, LCD, and VGA. Depending on the type of screen, that power supply provides different voltages. so the screen and power supply unit should go together as a rule. You can tell from the video card: Two EPROM sockets means it's monochrome, one socket means LCD, no sockets mean VGA. Like Shawn, I don't really have the time to truly investigate these machines to this level of intensity, or I would go get the equipment myself and do the work. It would really be nice if someone was able to do that work for the group. Pictures would also be great. A functioning hard drive would be in some demand by others here in the group as they are difficult to come by. If you have 1 MB SIPPs in the machine, they would also be very much in demand, though chances are you will only have 256K sticks. Past this though, I don't any other ideas.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
> > Getting old things to boot off SD cards is cool... I saw old
> > macbooks being modified like that in other places. Fun stuff.
> > The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
> >
> > If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
> >
> > So here's what I know:
> >
> > From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
> > I can put a power resister on the supply and see if it holds up.
> > But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
> > If I were to take it appart, I'd look for visual signs of a failure.
> > Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
> >
> > Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
> >
> > Any other ideas
> >
>
Date: Sun, 29 Jul 2012 19:40:12 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Ah, I said SD and was really thinking CF, so I started you off on a rabit hole. Sorry, but thanks it was informative none the less as I thought SD was based on some sort of IDE variant. Now I now not.
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> I would be very interested in seeing pictures.
>
> Booting from CF or SD would be cool. SD would be really tricky. Thinking it through, you'd have to build some sort of interface to hook the IDE in the Grid to SD. Not impossible, just may not be worth it, in terms of hardware and time.
> CF interface is IDE, so it lends itself very nicely to the Grid.
> But as others have suggested, Disk On Module would be a better way to go than CF.
>
> I really need to get back to working with Grids. I've got too many projects going on. My latest project is finding a use for my Raspberry Pi. Amazing little machine for $35.
> -Shawn
> P.S. CF = Compact Flash in case anyone is confused.
>
>
> ________________________________
> From: "techtalklive@..." <doug@...>
> To: RuGRiD-Laptop@yahoogroups.com
> Sent: Sunday, July 29, 2012 1:36 PM
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
> Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
> Getting old things to boot off SD cards is cool... I saw old
> macbooks being modified like that in other places. Fun stuff.
> The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
>
> If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
>
> So here's what I know:
>
> From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
> I can put a power resister on the supply and see if it holds up.
> But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
> If I were to take it appart, I'd look for visual signs of a failure.
> Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
>
> Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
>
> Any other ideas
>
>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
> http://docs.yahoo.com/info/terms/
>
Date: Sun, 29 Jul 2012 20:25:24 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Check your regular email, DC
There's a PDF file there that will help you tear the computer down.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> That was useful! It looks like I should head in the direction of a careful teardown to investigate whats inside regardless of fixing.
> I assume I will find tear down info in the manuals...
> Thanks so much.
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > Thanks, DC,
> >
> > I would also be interested in the unit myself. Concerning the screens, one thing I would point out is that that rear power supply unit, which is separate from the motherboard and behind the disk drives, is allied with and supplies the video screen. These computers used three types of screens; monchrome, LCD, and VGA. Depending on the type of screen, that power supply provides different voltages. so the screen and power supply unit should go together as a rule. You can tell from the video card: Two EPROM sockets means it's monochrome, one socket means LCD, no sockets mean VGA. Like Shawn, I don't really have the time to truly investigate these machines to this level of intensity, or I would go get the equipment myself and do the work. It would really be nice if someone was able to do that work for the group. Pictures would also be great. A functioning hard drive would be in some demand by others here in the group as they are difficult to come by. If you have 1 MB SIPPs in the machine, they would also be very much in demand, though chances are you will only have 256K sticks. Past this though, I don't any other ideas.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
> > > Getting old things to boot off SD cards is cool... I saw old
> > > macbooks being modified like that in other places. Fun stuff.
> > > The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
> > >
> > > If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
> > >
> > > So here's what I know:
> > >
> > > From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
> > > I can put a power resister on the supply and see if it holds up.
> > > But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
> > > If I were to take it appart, I'd look for visual signs of a failure.
> > > Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
> > >
> > > Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
> > >
> > > Any other ideas
> > >
> >
>
Date: Mon, 30 Jul 2012 02:46:04 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Thank you!
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Check your regular email, DC
>
> There's a PDF file there that will help you tear the computer down.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > That was useful! It looks like I should head in the direction of a careful teardown to investigate whats inside regardless of fixing.
> > I assume I will find tear down info in the manuals...
> > Thanks so much.
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > Thanks, DC,
> > >
> > > I would also be interested in the unit myself. Concerning the screens, one thing I would point out is that that rear power supply unit, which is separate from the motherboard and behind the disk drives, is allied with and supplies the video screen. These computers used three types of screens; monchrome, LCD, and VGA. Depending on the type of screen, that power supply provides different voltages. so the screen and power supply unit should go together as a rule. You can tell from the video card: Two EPROM sockets means it's monochrome, one socket means LCD, no sockets mean VGA. Like Shawn, I don't really have the time to truly investigate these machines to this level of intensity, or I would go get the equipment myself and do the work. It would really be nice if someone was able to do that work for the group. Pictures would also be great. A functioning hard drive would be in some demand by others here in the group as they are difficult to come by. If you have 1 MB SIPPs in the machine, they would also be very much in demand, though chances are you will only have 256K sticks. Past this though, I don't any other ideas.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > Thanks for the heads up. I had seen that the traffic on these machines were usually about the RTC and Hard Disks. Interesting stuff.
> > > > Getting old things to boot off SD cards is cool... I saw old
> > > > macbooks being modified like that in other places. Fun stuff.
> > > > The eprom work is very impressive. I used to burn eproms back in the 80's for embedded system software development.
> > > >
> > > > If I start taking it apart, will others still be interested in it for parts? Its a really clean example. There were sub models of this with different screens I think. This screen is very tall. Could post pics if anything would want to see it.
> > > >
> > > > So here's what I know:
> > > >
> > > > From the exterior there is no visual or audible response to the power switch. Yes it could still be the supply not working under load.
> > > > I can put a power resister on the supply and see if it holds up.
> > > > But I might expect a blip on some LED if that was the case, so I am assuming something wrong at the early interior power stages, like a cap.
> > > > If I were to take it appart, I'd look for visual signs of a failure.
> > > > Then perhaps try some cold spray diagnosis and see if it response to that. I do have a scope to poke around with but yes without a schematic it would be a shot in the dark.
> > > >
> > > > Finally assuming maybe an overheat/separation I could try giving the board a hit with a heat gun in likely spots.
> > > >
> > > > Any other ideas
> > > >
> > >
> >
>
Date: Mon, 30 Jul 2012 02:55:27 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Good point on the test points of a working machine.
A good service manual would have probably run down the test points
and related what components to check when they don't have the right things going on with them.
Argh. Even if some kind soul probed them we wouldn't know what
they relate to without a schematic.
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> Hello DC. Welcome to the group!
> A "DRT" 1530, eh? (DRT=Dead, Right There) I'm assuming none of the LED's on the motherboard light up, right?
> I'm not an expert on the 1530. I'm a lot more familiar with the 1520 and 1550SX. There's no way around it, you're going to have to open the case.
> Thinking about it, it may be the 16 volt power supply. Being that it's old, it may fail when a load is placed on it. It might help to test this with another power supply, assuming you have another DC supply to test with.
> I don't remember any fuses inside any of the Grids. HHmm...I wonder if someone applied too much voltage to it and an internal componet fried.
> Just a thought.
> -Shawn
>
>
> ________________________________
> From: "techtalklive@..." <doug@...>
> To: RuGRiD-Laptop@yahoogroups.com
> Sent: Saturday, July 28, 2012 10:55 PM
> Subject: [RuGRiD-Laptop] Typical 1500 series failure modes?
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
> http://docs.yahoo.com/info/terms/
>
Date: Mon, 30 Jul 2012 02:57:26 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Photos posted "doug's 1530 stuff"
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
Date: Sun, 29 Jul 2012 22:58:24 -0400
From: Doug Crawford
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Is it in the files section anyway?
DC
On 7/29/2012 4:25 PM, jeriddian wrote:
There's a PDF file there that will help you tear the
computer down.
Phil
--- In RuGRiD-Laptop@yahoogroups.com,
"techtalklive@..."
>
> That was useful! It looks like I should head in the
direction of a careful teardown to investigate whats
inside regardless of fixing.
> I assume I will find tear down info in the manuals...
> Thanks so much.
>
> --- In RuGRiD-Laptop@yahoogroups.com,
"jeriddian"
> >
> > Thanks, DC,
> >
> > I would also be interested in the unit myself.
Concerning the screens, one thing I would point out is
that that rear power supply unit, which is separate from
the motherboard and behind the disk drives, is allied with
and supplies the video screen. These computers used three
types of screens; monchrome, LCD, and VGA. Depending on
the type of screen, that power supply provides different
voltages. so the screen and power supply unit should go
together as a rule. You can tell from the video card: Two
EPROM sockets means it's monochrome, one socket means LCD,
no sockets mean VGA. Like Shawn, I don't really have the
time to truly investigate these machines to this level of
intensity, or I would go get the equipment myself and do
the work. It would really be nice if someone was able to
do that work for the group. Pictures would also be great.
A functioning hard drive would be in some demand by others
here in the group as they are difficult to come by. If you
have 1 MB SIP Ps in the machine, they would also be very
much in demand, though chances are you will only have 256K
sticks. Past this though, I don't any other ideas.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com,
"techtalklive@"
> > >
> > > Thanks for the heads up. I had seen that
the traffic on these machines were usually about the RTC
and Hard Disks. Interesting stuff.
> > > Getting old things to boot off SD cards is
cool... I saw old
> > > macbooks being modified like that in other
places. Fun stuff.
> > > The eprom work is very impressive. I used
to burn eproms back in the 80's for embedded system
software development.
> > >
> > > If I start taking it apart, will others
still be interested in it for parts? Its a really clean
example. There were sub models of this with different
screens I think. This screen is very tall. Could post pics
if anything would want to see it.
> > >
> > > So here's what I know:
> > >
> > > From the exterior there is no visual or
audible response to the power switch. Yes it could still
be the supply not working under load.
> > > I can put a power resister on the supply
and see if it holds up.
> > > But I might expect a blip on some LED if
that was the case, so I am assuming something wrong at the
early interior power stages, like a cap.
> > > If I were to take it appart, I'd look for
visual signs of a failure.
> > > Then perhaps try some cold spray diagnosis
and see if it response to that. I do have a scope to poke
around with but yes without a schematic it would be a shot
in the dark.
> > >
> > > Finally assuming maybe an
overheat/separation I could try giving the board a hit
with a heat gun in likely spots.
> > >
> > > Any other ideas
> > >
> >
>
Date: Sun, 29 Jul 2012 22:59:27 -0400
From: Doug Crawford
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
DC
On 7/29/2012 4:25 PM, jeriddian wrote:
There's a PDF file there that will help you tear the
computer down.
Phil
--- In RuGRiD-Laptop@yahoogroups.com,
"techtalklive@..."
>
> That was useful! It looks like I should head in the
direction of a careful teardown to investigate whats
inside regardless of fixing.
> I assume I will find tear down info in the manuals...
> Thanks so much.
>
> --- In RuGRiD-Laptop@yahoogroups.com,
"jeriddian"
> >
> > Thanks, DC,
> >
> > I would also be interested in the unit myself.
Concerning the screens, one thing I would point out is
that that rear power supply unit, which is separate from
the motherboard and behind the disk drives, is allied with
and supplies the video screen. These computers used three
types of screens; monchrome, LCD, and VGA. Depending on
the type of screen, that power supply provides different
voltages. so the screen and power supply unit should go
together as a rule. You can tell from the video card: Two
EPROM sockets means it's monochrome, one socket means LCD,
no sockets mean VGA. Like Shawn, I don't really have the
time to truly investigate these machines to this level of
intensity, or I would go get the equipment myself and do
the work. It would really be nice if someone was able to
do that work for the group. Pictures would also be great.
A functioning hard drive would be in some demand by others
here in the group as they are difficult to come by. If you
have 1 MB SIP Ps in the machine, they would also be very
much in demand, though chances are you will only have 256K
sticks. Past this though, I don't any other ideas.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com,
"techtalklive@"
> > >
> > > Thanks for the heads up. I had seen that
the traffic on these machines were usually about the RTC
and Hard Disks. Interesting stuff.
> > > Getting old things to boot off SD cards is
cool... I saw old
> > > macbooks being modified like that in other
places. Fun stuff.
> > > The eprom work is very impressive. I used
to burn eproms back in the 80's for embedded system
software development.
> > >
> > > If I start taking it apart, will others
still be interested in it for parts? Its a really clean
example. There were sub models of this with different
screens I think. This screen is very tall. Could post pics
if anything would want to see it.
> > >
> > > So here's what I know:
> > >
> > > From the exterior there is no visual or
audible response to the power switch. Yes it could still
be the supply not working under load.
> > > I can put a power resister on the supply
and see if it holds up.
> > > But I might expect a blip on some LED if
that was the case, so I am assuming something wrong at the
early interior power stages, like a cap.
> > > If I were to take it appart, I'd look for
visual signs of a failure.
> > > Then perhaps try some cold spray diagnosis
and see if it response to that. I do have a scope to poke
around with but yes without a schematic it would be a shot
in the dark.
> > >
> > > Finally assuming maybe an
overheat/separation I could try giving the board a hit
with a heat gun in likely spots.
> > >
> > > Any other ideas
> > >
> >
>
Date: Sun, 29 Jul 2012 20:16:02 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=iso-8859-1
Cool pics, Doug.
I kinda was hoping for internal pictures. But it does look like you got one in very good condition.
If you haven't seen it in the service documentation, this is how you open the Grid:
In the 1st photo of the rear of the unit (picture 100_4142), you'll see two rubber "feet" at both ends of the Grid. If you use a small flat blade screwdriver, those feet pop off.
The feet cover screws.
Remove the screws. The rear deck lid should be able to be removed. Then, you'll should be able to get a good visual of the internals of the 1530.
Good luck,
-Shawn
________________________________
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Sunday, July 29, 2012 10:57 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Photos posted "doug's 1530 stuff"
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
http://docs.yahoo.com/info/terms/
Date: Mon, 30 Jul 2012 04:06:05 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
DC,
I put the PDF file on Skydrive and it is in an email I sent to your regular email address at do**@ cr********d.com. It's not in the files section of the forum. This PDF is too big to place on the forum as it is 37 MB's. The file is downloadable as an attachment on the separate email.
Phil
Date: Mon, 30 Jul 2012 10:17:06 -0400
From: Doug Crawford
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
DC
On 7/29/2012 11:16 PM, Shawnerz wrote:
To:
RuGRiD-Laptop@yahoogroups.com
Sent:
Sunday, July 29, 2012 10:57 PM
Subject:
[RuGRiD-Laptop] Re: Typical 1500 series failure
modes?
Photos posted "doug's 1530 stuff"
--- In RuGRiD-Laptop@yahoogroups.com,
"techtalklive@..."
>
> I am considering tackling the repair of a 1530
that
> does not respond to the power switch. The power
supply
> module measures 16.35v so I think its fine
(unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service
manuals
> downloaded but I thought maybe I'd get some
pointers form
> folks who have already performed cold stone dead
diagnosis.
>
> If I don't dive into this FYI this very clean
1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
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Date: Mon, 30 Jul 2012 19:22:01 +0100 (BST)
From: Alessandro Aria
Subject: GRIDCASE 1590
text/plain; charset=utf-8
Hi ,a GRIDCASE 1590 for sale on eBay!
Ciao...Alessandro
Stromboli Islans
Date: Tue, 31 Jul 2012 01:07:45 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Posted the internal pics.
Looks like I have an LCD video and 256k memory.
Nothing special, huh?
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
Date: Tue, 31 Jul 2012 03:32:58 -0000
From: "jeriddian"
Subject: Download of Manuals and other Files
To all forum Members.
I now have my own server space and have uploaded all of the manuals and other pertinent files to it. Below is a list of the files presently on the server that are available for download:
www.omnipulsemedia.com/GRiD_files/Removing and Replacing the 1287A RTC Timing Chip.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 DISASSEMBLY_REASSEMBLY Instructions.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Field Diagnostics.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 No Boot Procedure.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service Course Student Guide.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service Course.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Technical Reference Manual.pdf
www.omnipulsemedia.com/GRiD_files/GRiDCASE 1535 EXP Owner's Manual.pdf
PLease feel free to download them at your convenience.
Have fun :-)
Phil
Date: Tue, 31 Jul 2012 06:56:39 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
The machine started working!
It may be an intermittent on/off switch.
So gets through the memory check,
then gets, no surprise... invalid config info 02
and F1 to continue.
But it won't recognize F1 from either the internal or external
keyboard.
Any comments?
Is that a failure mode when the Dallas chip is really dead?
I hope thats it... I think I can do the Dallas change.
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
Date: Tue, 31 Jul 2012 07:07:45 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Well part of the prob could be the P/S.
It started overheating even though the grid was switched off.
Looks like I won't get any further until I can power this
another way.
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
Date: Tue, 31 Jul 2012 13:47:34 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Great to hear, DC,
First, regarding the power supply, Are you referring to the power supply unit going into the back of the computer? If so, those can be replaced. If you are talking about power supply on the motherboard, that of course is another thing.
Second, from your previous post, the response on the screen that you indicated does mean you are correct in that the Dallas RTC chip is dead. It will have to be replaced or modified. I recently uploaded a URL by which you can download the files on how I replace the 1287A chip (and all the manuals as well). I don't know if you were able to get that one yet. The 1287A chips are not that hard to find. In 1530's, you can just replace the chip and boot back up, whereas in 1520's it is sometimes a problem.
Anyway, the pwoer problem comes first of course.
Best of luck,
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Well part of the prob could be the P/S.
> It started overheating even though the grid was switched off.
> Looks like I won't get any further until I can power this
> another way.
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I am considering tackling the repair of a 1530 that
> > does not respond to the power switch. The power supply
> > module measures 16.35v so I think its fine (unfortunately,
> > that would have been an easy problem isolation!)
> > So its something internal. I have the service manuals
> > downloaded but I thought maybe I'd get some pointers form
> > folks who have already performed cold stone dead diagnosis.
> >
> > If I don't dive into this FYI this very clean 1530 will
> > be available for parts/repair!
> >
> > Thanks in advance,
> > DC
> >
>
Date: Tue, 31 Jul 2012 14:18:59 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Thanks Phil.
Yes forgot to differentiate the P.S., fortunately
its the EXTERNAL one. Everything internal looks in
order.
And yes, I have your docs, thanks again!
Just to be clear, is the failure to recognize the F1 key
also symptomatic of the Dallas chip being dead?
I can understand the config info being corrupt hence
the 02 code but on other MBs when the MB battery is
dead the F1 key still functions.
I'm curious about the external PS.
It is all silver and has writing on it that it fits a
a number of different GRiDs. Was this some sort of
GRiD replacement P.S.?
Thanks in advance,
DC
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Great to hear, DC,
>
> First, regarding the power supply, Are you referring to the power supply unit going into the back of the computer? If so, those can be replaced. If you are talking about power supply on the motherboard, that of course is another thing.
>
> Second, from your previous post, the response on the screen that you indicated does mean you are correct in that the Dallas RTC chip is dead. It will have to be replaced or modified. I recently uploaded a URL by which you can download the files on how I replace the 1287A chip (and all the manuals as well). I don't know if you were able to get that one yet. The 1287A chips are not that hard to find. In 1530's, you can just replace the chip and boot back up, whereas in 1520's it is sometimes a problem.
>
> Anyway, the pwoer problem comes first of course.
>
> Best of luck,
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > Well part of the prob could be the P/S.
> > It started overheating even though the grid was switched off.
> > Looks like I won't get any further until I can power this
> > another way.
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I am considering tackling the repair of a 1530 that
> > > does not respond to the power switch. The power supply
> > > module measures 16.35v so I think its fine (unfortunately,
> > > that would have been an easy problem isolation!)
> > > So its something internal. I have the service manuals
> > > downloaded but I thought maybe I'd get some pointers form
> > > folks who have already performed cold stone dead diagnosis.
> > >
> > > If I don't dive into this FYI this very clean 1530 will
> > > be available for parts/repair!
> > >
> > > Thanks in advance,
> > > DC
> > >
> >
>
Date: Tue, 31 Jul 2012 15:31:21 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
>
My apologies, DC,
I should clarify. It is the config 02 code that tells you the CMOS battery in the 1287A is dead. The F1 key, however, is a different matter. When the CMOS battery is dead, F1 may or may not work. Part of the problem is that when the CMOS battery is dead, then the config data for the HDD cannot be accessed from CMOS. When that happens, the computer cannot recognize the HDD, and if you are trying to boot from the hard drive, the computer won't boot, giving you a failure warning of no OS. You should still be able to boot from a floppy, but possibly depending on which OS (Anywhere from DOS 3.1 to DOS 6.22, though I am not completely sure of this), the F1 key may give you a different response as to the problem, or none at all. I have found it to happen haphazardly with the units I encountered, and have yet to figure out why there are different responses or none at all.
The silver PS is standard, but not the only one out there. I possess several of those and the other standard black ones. They have slightly different power ratings. I forget which is which at the moment.
Phil
> Thanks Phil.
>
> Yes forgot to differentiate the P.S., fortunately
> its the EXTERNAL one. Everything internal looks in
> order.
>
> And yes, I have your docs, thanks again!
>
> Just to be clear, is the failure to recognize the F1 key
> also symptomatic of the Dallas chip being dead?
> I can understand the config info being corrupt hence
> the 02 code but on other MBs when the MB battery is
> dead the F1 key still functions.
>
> I'm curious about the external PS.
> It is all silver and has writing on it that it fits a
> a number of different GRiDs. Was this some sort of
> GRiD replacement P.S.?
>
> Thanks in advance,
> DC
Date: Tue, 31 Jul 2012 12:27:11 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Download of Manuals and other Files
Ah! Thank you much, Phil.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "jeriddian" <Jeriddian@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Monday, July 30, 2012 11:32 PM
Subject: [RuGRiD-Laptop] Download of Manuals and other Files
> To all forum Members.
>
> I now have my own server space and have uploaded all of the manuals and
> other pertinent files to it. Below is a list of the files presently on the
> server that are available for download:
>
> www.omnipulsemedia.com/GRiD_files/Removing and Replacing the 1287A RTC
> Timing Chip.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 DISASSEMBLY_REASSEMBLY
> Instructions.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Field Diagnostics.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 No Boot Procedure.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service
> Course Student Guide.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service
> Course.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Technical
> Reference Manual.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1535 EXP Owner's Manual.pdf
>
> PLease feel free to download them at your convenience.
>
> Have fun :-)
>
> Phil
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Tue, 31 Jul 2012 22:06:51 -0000
From: "jeriddian"
Subject: Re: Download of Manuals and other Files
You're welcome, Tom.
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> Ah! Thank you much, Phil.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: "jeriddian" <Jeriddian@...>
> To: <RuGRiD-Laptop@yahoogroups.com>
> Sent: Monday, July 30, 2012 11:32 PM
> Subject: [RuGRiD-Laptop] Download of Manuals and other Files
>
>
> > To all forum Members.
> >
> > I now have my own server space and have uploaded all of the manuals and
> > other pertinent files to it. Below is a list of the files presently on the
> > server that are available for download:
> >
> > www.omnipulsemedia.com/GRiD_files/Removing and Replacing the 1287A RTC
> > Timing Chip.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 DISASSEMBLY_REASSEMBLY
> > Instructions.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Field Diagnostics.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 No Boot Procedure.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service
> > Course Student Guide.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service
> > Course.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Technical
> > Reference Manual.pdf
> >
> > www.omnipulsemedia.com/GRiD_files/GRiDCASE 1535 EXP Owner's Manual.pdf
> >
> > PLease feel free to download them at your convenience.
> >
> > Have fun :-)
> >
> > Phil
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
Date: Wed, 01 Aug 2012 11:22:19 -0000
From: "techtalklive@..."
Subject: Re: Download of Manuals and other Files
I replaced my multipart docs from here and got the tear down instructions.
Thanks!
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> To all forum Members.
>
> I now have my own server space and have uploaded all of the manuals and other pertinent files to it. Below is a list of the files presently on the server that are available for download:
>
> www.omnipulsemedia.com/GRiD_files/Removing and Replacing the 1287A RTC Timing Chip.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 DISASSEMBLY_REASSEMBLY Instructions.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Field Diagnostics.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 No Boot Procedure.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service Course Student Guide.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Service Course.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1500 Series Hardware Technical Reference Manual.pdf
>
> www.omnipulsemedia.com/GRiD_files/GRiDCASE 1535 EXP Owner's Manual.pdf
>
> PLease feel free to download them at your convenience.
>
> Have fun :-)
>
> Phil
>
Date: Wed, 01 Aug 2012 11:31:37 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
OK, just a guess here, would need a schematic to verify...
but here goes:
The battery is involved with the Vcc of the keyboard chip.
When the battery cold stone dead the keyboard chip is
unpowered but depending on the particular kbd chip, it may
or may not power up sufficiently through other pins of the chip
to run. I used to see chips sometimes power up through
their other interface pins when testing power consumption
at a silicon manufacturer on ethernet phy ICs.
That would explain perhaps why some boards respond to F1 and
some don't. Without some help from the battery in this
case the kbd IC may or may not work right.
Anyway, I take it now that all bets are off for F1 until
the Dallas chip/battery is changed. So I'll start on
that and look for a p.s.
Thanks for the tips!
I noticed there is no 387 chip installed in my MB.
I have one, I forget whether it does much good or not
in 386 vintage machines. Probably not... this is all
just a curiosity machine anyway.
I'm also assuming that there is not a lot of charm
to the LCD display version, or am I wrong here?
DC
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> >
> My apologies, DC,
>
> I should clarify. It is the config 02 code that tells you the CMOS battery in the 1287A is dead. The F1 key, however, is a different matter. When the CMOS battery is dead, F1 may or may not work. Part of the problem is that when the CMOS battery is dead, then the config data for the HDD cannot be accessed from CMOS. When that happens, the computer cannot recognize the HDD, and if you are trying to boot from the hard drive, the computer won't boot, giving you a failure warning of no OS. You should still be able to boot from a floppy, but possibly depending on which OS (Anywhere from DOS 3.1 to DOS 6.22, though I am not completely sure of this), the F1 key may give you a different response as to the problem, or none at all. I have found it to happen haphazardly with the units I encountered, and have yet to figure out why there are different responses or none at all.
>
> The silver PS is standard, but not the only one out there. I possess several of those and the other standard black ones. They have slightly different power ratings. I forget which is which at the moment.
>
> Phil
>
>
> > Thanks Phil.
> >
> > Yes forgot to differentiate the P.S., fortunately
> > its the EXTERNAL one. Everything internal looks in
> > order.
> >
> > And yes, I have your docs, thanks again!
> >
> > Just to be clear, is the failure to recognize the F1 key
> > also symptomatic of the Dallas chip being dead?
> > I can understand the config info being corrupt hence
> > the 02 code but on other MBs when the MB battery is
> > dead the F1 key still functions.
> >
> > I'm curious about the external PS.
> > It is all silver and has writing on it that it fits a
> > a number of different GRiDs. Was this some sort of
> > GRiD replacement P.S.?
> >
> > Thanks in advance,
> > DC
>
Date: Wed, 01 Aug 2012 12:44:12 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
I'm supposing I can replace these.
Any identification tips welcome, thanks.
There appears to be two of the same caps, would replace both
of course.
DC
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I am considering tackling the repair of a 1530 that
> does not respond to the power switch. The power supply
> module measures 16.35v so I think its fine (unfortunately,
> that would have been an easy problem isolation!)
> So its something internal. I have the service manuals
> downloaded but I thought maybe I'd get some pointers form
> folks who have already performed cold stone dead diagnosis.
>
> If I don't dive into this FYI this very clean 1530 will
> be available for parts/repair!
>
> Thanks in advance,
> DC
>
Date: Wed, 01 Aug 2012 14:20:49 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Good Find, DC
I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> I'm supposing I can replace these.
> Any identification tips welcome, thanks.
> There appears to be two of the same caps, would replace both
> of course.
>
> DC
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I am considering tackling the repair of a 1530 that
> > does not respond to the power switch. The power supply
> > module measures 16.35v so I think its fine (unfortunately,
> > that would have been an easy problem isolation!)
> > So its something internal. I have the service manuals
> > downloaded but I thought maybe I'd get some pointers form
> > folks who have already performed cold stone dead diagnosis.
> >
> > If I don't dive into this FYI this very clean 1530 will
> > be available for parts/repair!
> >
> > Thanks in advance,
> > DC
> >
>
Date: Wed, 01 Aug 2012 14:54:58 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Very interesting, DC
That might explain some of the other aberrant behavior, as I have also found that some units with dead CMOS batteries will boot from their floppy drives, and some will not. As you said, the schematic would most certainly help.
As you noted, replacing the 1287A chip is key. Now let me advise you on this. DO NOT use the 12887A that Dallas Semiconductor promotes as the replacement for the old 1287A, which is no longer made. The 12887A has a CMOS memory of 128 bytes of RAM. This is double the 64 bytes of RAM in the 1287A. The BIOS of the old GRiD 1500 series of computers cannot address this expanded RAM correctly and therefore the 12887A will NOT work in these old computers. (I know. I found out the hard way.) You must get an original 1287A chip. Go with the 1287A chip and NOT the 1287, as the 1287 does not have a reset pin. Although they stopped making the 1287A more than 15 years ago or so, you can still find the chip out there for sale at different web sites. I managed to snag a healthy supply for my units as they need them, at about $15-$20 each.
The 1500 series computers did not normally come with thir math coprocessors, but as you noted can be fitted with them. Two of my 1530's have them, but they are difficult to find. The 1520's ran at 10 MHz, and the 1530's run at 12.5 MHz (half the speed of the 386 CPU's). I would recommend that if you use your 387, it should be running at least at 12.5 Mhz, although a slower speed chip may still work. There is old GRiD software out there that lets you check the 387's and let you make sure they are working correctly. I think I have the program around, but I can't think of where it is right now. It may be in the files section here on the forum from one of the other forum members.
You are correct in that the LCD versions were not that spectacular. I think this was when LCD's were first coming out and were still a little primitive in their sophisication, though I speculate. If you could find a VGA screen, I think it would look better. I have one on my original 1530, but I've yet to find another anywhere else.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> OK, just a guess here, would need a schematic to verify...
> but here goes:
> The battery is involved with the Vcc of the keyboard chip.
> When the battery cold stone dead the keyboard chip is
> unpowered but depending on the particular kbd chip, it may
> or may not power up sufficiently through other pins of the chip
> to run. I used to see chips sometimes power up through
> their other interface pins when testing power consumption
> at a silicon manufacturer on ethernet phy ICs.
> That would explain perhaps why some boards respond to F1 and
> some don't. Without some help from the battery in this
> case the kbd IC may or may not work right.
>
> Anyway, I take it now that all bets are off for F1 until
> the Dallas chip/battery is changed. So I'll start on
> that and look for a p.s.
>
> Thanks for the tips!
>
> I noticed there is no 387 chip installed in my MB.
> I have one, I forget whether it does much good or not
> in 386 vintage machines. Probably not... this is all
> just a curiosity machine anyway.
>
> I'm also assuming that there is not a lot of charm
> to the LCD display version, or am I wrong here?
>
> DC
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > >
> > My apologies, DC,
> >
> > I should clarify. It is the config 02 code that tells you the CMOS battery in the 1287A is dead. The F1 key, however, is a different matter. When the CMOS battery is dead, F1 may or may not work. Part of the problem is that when the CMOS battery is dead, then the config data for the HDD cannot be accessed from CMOS. When that happens, the computer cannot recognize the HDD, and if you are trying to boot from the hard drive, the computer won't boot, giving you a failure warning of no OS. You should still be able to boot from a floppy, but possibly depending on which OS (Anywhere from DOS 3.1 to DOS 6.22, though I am not completely sure of this), the F1 key may give you a different response as to the problem, or none at all. I have found it to happen haphazardly with the units I encountered, and have yet to figure out why there are different responses or none at all.
> >
> > The silver PS is standard, but not the only one out there. I possess several of those and the other standard black ones. They have slightly different power ratings. I forget which is which at the moment.
> >
> > Phil
> >
> >
> > > Thanks Phil.
> > >
> > > Yes forgot to differentiate the P.S., fortunately
> > > its the EXTERNAL one. Everything internal looks in
> > > order.
> > >
> > > And yes, I have your docs, thanks again!
> > >
> > > Just to be clear, is the failure to recognize the F1 key
> > > also symptomatic of the Dallas chip being dead?
> > > I can understand the config info being corrupt hence
> > > the 02 code but on other MBs when the MB battery is
> > > dead the F1 key still functions.
> > >
> > > I'm curious about the external PS.
> > > It is all silver and has writing on it that it fits a
> > > a number of different GRiDs. Was this some sort of
> > > GRiD replacement P.S.?
> > >
> > > Thanks in advance,
> > > DC
> >
>
Date: Wed, 01 Aug 2012 12:04:58 -0400
From: "Len.C"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=ISO-8859-1; format=flowed
Well now that I found the pictures its easy to identify that cap, the
type I am not sure but it is marked 16micorfarad, but then has an X2 on
it and its 250volt. How many leads are on it?
Now the worst part about OLD electronics is that these caps,
electrolytics, are OLD they are DRYING OUT, or DRIED OUT, most likely
the later. I would find any electrolytic on the power supply and
replace them. I don't care how good they look, replace it, remember to
observe polarity. That is a high speed switching power supply, caps
will be very important in it for the supply to work properly, your bad
one there, well it looks like it is just part of the AC input filter so
it maybe be bypassed, the problem might be finding a replacement that is
going to fit in there. That could be all that is wrong with it for the
time being but looks like it took a surge. You might be able to find
something in a newer power supply for a laptop or even a desktop.
But everyone needs to be thinking what are these things worth to keep
using them? Can YOU replace the caps in your power supplies? What about
in the computer itself as sooner or later they will start to go as they
will be dried out. I am not trying to be negative here just a reality
check and its not just these things this is happening to.
On 8/1/2012 10:20 AM, jeriddian wrote:
>
> Good Find, DC
>
> I guess they got burnt to the point where you can't identify the
> capcity amount. Could you give me the output voltage and amperage?
> I'll look through my units and see if I can identify them for you.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@..."
> <doug@...> wrote:
> >
> > I posted pictures of what looks like a failed cap in the ext p.s.
> unit. A stinky melt down!
> > I'm supposing I can replace these.
> > Any identification tips welcome, thanks.
> > There appears to be two of the same caps, would replace both
> > of course.
> >
> > DC
> >
> > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > >
> > > I am considering tackling the repair of a 1530 that
> > > does not respond to the power switch. The power supply
> > > module measures 16.35v so I think its fine (unfortunately,
> > > that would have been an easy problem isolation!)
> > > So its something internal. I have the service manuals
> > > downloaded but I thought maybe I'd get some pointers form
> > > folks who have already performed cold stone dead diagnosis.
> > >
> > > If I don't dive into this FYI this very clean 1530 will
> > > be available for parts/repair!
> > >
> > > Thanks in advance,
> > > DC
> > >
> >
>
>
Date: Wed, 01 Aug 2012 16:49:18 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
There are two in there that are the same.
.15uF 250V I think I can replace them.
Polyprop I think. Radial type in a square package.
The bottom is clear so you can see the radial shape.
I have them out already.
Thanks for the tip on the 1287A
DC
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Good Find, DC
>
> I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > I'm supposing I can replace these.
> > Any identification tips welcome, thanks.
> > There appears to be two of the same caps, would replace both
> > of course.
> >
> > DC
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I am considering tackling the repair of a 1530 that
> > > does not respond to the power switch. The power supply
> > > module measures 16.35v so I think its fine (unfortunately,
> > > that would have been an easy problem isolation!)
> > > So its something internal. I have the service manuals
> > > downloaded but I thought maybe I'd get some pointers form
> > > folks who have already performed cold stone dead diagnosis.
> > >
> > > If I don't dive into this FYI this very clean 1530 will
> > > be available for parts/repair!
> > >
> > > Thanks in advance,
> > > DC
> > >
> >
>
Date: Thu, 02 Aug 2012 14:58:16 -0000
From: "fullsizewagon"
Subject: Re: Typical 1500 series failure modes?
Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> There are two in there that are the same.
> .15uF 250V I think I can replace them.
> Polyprop I think. Radial type in a square package.
> The bottom is clear so you can see the radial shape.
> I have them out already.
> Thanks for the tip on the 1287A
>
> DC
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > Good Find, DC
> >
> > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > I'm supposing I can replace these.
> > > Any identification tips welcome, thanks.
> > > There appears to be two of the same caps, would replace both
> > > of course.
> > >
> > > DC
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > I am considering tackling the repair of a 1530 that
> > > > does not respond to the power switch. The power supply
> > > > module measures 16.35v so I think its fine (unfortunately,
> > > > that would have been an easy problem isolation!)
> > > > So its something internal. I have the service manuals
> > > > downloaded but I thought maybe I'd get some pointers form
> > > > folks who have already performed cold stone dead diagnosis.
> > > >
> > > > If I don't dive into this FYI this very clean 1530 will
> > > > be available for parts/repair!
> > > >
> > > > Thanks in advance,
> > > > DC
> > > >
> > >
> >
>
Date: Thu, 02 Aug 2012 21:46:42 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Thanks so much that was great info. I had no idea on the X2
being a rating. May have to try it without them just to
make sure the rest of it is still good.
--- In RuGRiD-Laptop@yahoogroups.com, "fullsizewagon" <andrebakken@...> wrote:
>
> Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
> The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > There are two in there that are the same.
> > .15uF 250V I think I can replace them.
> > Polyprop I think. Radial type in a square package.
> > The bottom is clear so you can see the radial shape.
> > I have them out already.
> > Thanks for the tip on the 1287A
> >
> > DC
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > Good Find, DC
> > >
> > > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > > I'm supposing I can replace these.
> > > > Any identification tips welcome, thanks.
> > > > There appears to be two of the same caps, would replace both
> > > > of course.
> > > >
> > > > DC
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > I am considering tackling the repair of a 1530 that
> > > > > does not respond to the power switch. The power supply
> > > > > module measures 16.35v so I think its fine (unfortunately,
> > > > > that would have been an easy problem isolation!)
> > > > > So its something internal. I have the service manuals
> > > > > downloaded but I thought maybe I'd get some pointers form
> > > > > folks who have already performed cold stone dead diagnosis.
> > > > >
> > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > be available for parts/repair!
> > > > >
> > > > > Thanks in advance,
> > > > > DC
> > > > >
> > > >
> > >
> >
>
Date: Tue, 11 Sep 2012 03:48:14 -0700 (PDT)
From: Shawnerz
Subject: Bill Moggridge, Designer of the Grid Compass, Dies
text/plain; charset=iso-8859-1
All,
If you haven't seen it elsewhere yet:
http://www.pcworld.com/article/262089/rip_bill_moggridge_design_father_of_the_laptop.html
Same article but with video tribute and picture of Grid Compass on the Space Shuttle:
http://news.cnet.com/8301-10797_3-57509168-235/bill-moggridge-early-laptop-designer-dies-at-age-69/?utm_source=twitterfeed&utm_medium=twitter
Same article but photo of astronaut John Creighton says GRID stands for "Graphical Retreival Information Display."
I'd never heard that. I wonder if this is the government name that NASA gave the Grid.
Enjoy,
-Shawn
Date: Mon, 1 Oct 2012 23:39:43 -0400
From: robert
Subject: bunch of grid parts for sale
text/plain; charset=ISO-8859-1
hey guys, just listed a bunch of grid parts on ebay. opening bid is
reasonable and i will combine shipping. USA sales only. (sorry, i'm lazy
and hate doing paperwork)
i will be listing more stuff as i find it. i had tons of stuff stashed away
and have forgotten what i had. i need to trim down my collection of
collections. the only grid i will be keeping is my NASA GRiD which is not
for sale. :-)
i will be listing all on ebay as part of a big clearance sale. had to empty
a semi filled with my crap that sat in my dads shop. keep an eye on the
username for more sh.. i mean stuff.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140860364798
--
73 de ke4mcl
"contesting on ham radio is like racing ford pintos, win or lose, other
people are still gonna laugh at you!"
Date: Mon, 1 Oct 2012 21:27:28 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] bunch of grid parts for sale
text/plain; charset=us-ascii
Thanks for letting us know. :)
________________________________
From: robert <dcat4955@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Monday, October 1, 2012 11:39 PM
Subject: [RuGRiD-Laptop] bunch of grid parts for sale
hey guys, just listed a bunch of grid parts on ebay. opening bid is reasonable and i will combine shipping. USA sales only. (sorry, i'm lazy and hate doing paperwork)
i will be listing more stuff as i find it. i had tons of stuff stashed away and have forgotten what i had. i need to trim down my collection of collections. the only grid i will be keeping is my NASA GRiD which is not for sale. :-)
i will be listing all on ebay as part of a big clearance sale. had to empty a semi filled with my crap that sat in my dads shop. keep an eye on the username for more sh.. i mean stuff.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140860364798
--
73 de ke4mcl
"contesting on ham radio is like racing ford pintos, win or lose, other people are still gonna laugh at you!"
Date: Thu, 04 Oct 2012 12:12:50 -0000
From: "Androgenoide"
Subject: Re: bunch of grid parts for sale
When you get around to digging up the one that came with the smashed plasma display I might be interested in the high voltage power supply that runs it...
--- In RuGRiD-Laptop@yahoogroups.com, robert <dcat4955@...> wrote:
>
> hey guys, just listed a bunch of grid parts on ebay. opening bid is
> reasonable and i will combine shipping. USA sales only. (sorry, i'm lazy
> and hate doing paperwork)
>
> i will be listing more stuff as i find it. i had tons of stuff stashed away
> and have forgotten what i had. i need to trim down my collection of
> collections. the only grid i will be keeping is my NASA GRiD which is not
> for sale. :-)
>
> i will be listing all on ebay as part of a big clearance sale. had to empty
> a semi filled with my crap that sat in my dads shop. keep an eye on the
> username for more sh.. i mean stuff.
>
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140860364798
>
> --
>
>
> 73 de ke4mcl
> "contesting on ham radio is like racing ford pintos, win or lose, other
> people are still gonna laugh at you!"
>
Date: Mon, 08 Oct 2012 01:06:23 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
It runs! Hard Disk is GOOD.
I did a DS1287 hack to the machine today and ran the wires to a convenient place for the battery. Upon power up it said
that the RTC was stopped, and it needed setting.
The "stopped" message threw me, I thought something was wrong with
the chip. It took an F1 to continue and went right through POST and Autoexec.
Using TIME and DATE in the GRIDUTIL directory set the RTC.
Now it boots cleanly.
Has Lotus123 on the HD.
I posted updated pics in "Dougs 1530 stuff"... page 2!
The only remaining issue is that a few keys on the keyboard
don't work. 123Q and spacebar. From an external kbd everything
works.
Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a half full 10MB hard disk and 3.5" floppy. Some smokin' system!
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Thanks so much that was great info. I had no idea on the X2
> being a rating. May have to try it without them just to
> make sure the rest of it is still good.
>
> --- In RuGRiD-Laptop@yahoogroups.com, "fullsizewagon" <andrebakken@> wrote:
> >
> > Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
> > The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > There are two in there that are the same.
> > > .15uF 250V I think I can replace them.
> > > Polyprop I think. Radial type in a square package.
> > > The bottom is clear so you can see the radial shape.
> > > I have them out already.
> > > Thanks for the tip on the 1287A
> > >
> > > DC
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > >
> > > > Good Find, DC
> > > >
> > > > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> > > >
> > > > Phil
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > > > I'm supposing I can replace these.
> > > > > Any identification tips welcome, thanks.
> > > > > There appears to be two of the same caps, would replace both
> > > > > of course.
> > > > >
> > > > > DC
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > I am considering tackling the repair of a 1530 that
> > > > > > does not respond to the power switch. The power supply
> > > > > > module measures 16.35v so I think its fine (unfortunately,
> > > > > > that would have been an easy problem isolation!)
> > > > > > So its something internal. I have the service manuals
> > > > > > downloaded but I thought maybe I'd get some pointers form
> > > > > > folks who have already performed cold stone dead diagnosis.
> > > > > >
> > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > be available for parts/repair!
> > > > > >
> > > > > > Thanks in advance,
> > > > > > DC
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 08 Oct 2012 01:28:49 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Great job, Doug!
Isn't it nice when you manage to salvage one of these beautiful machines? And yep, that's the way it works.
Once you restore battery power to the 1287A, the CMOS registers are again active. It's just that they're filled with nonsense, so the computer tells you the clock had stopped (which it did), and simply prompts you to reset the time. Once you do that and reboot, everything's hunky-dory.
You can probably find some more 256K sticks somewhere and upgrade the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to hear the HDD is good too.
I recently got a great deal. There was a 1520 on sale on ebay that I looked at, however it was strange. It was definitely branded a 1520, and advertised that way, but the flip up screen said it was a 386 machine. I decided to get it, and it was only about $90 with shipping. When I got the machine, I was very excited when it began to post, because I got a full 8MB of RAM! It of course displayed the configuration error 02 indicating the CMOS battery was dead. So I opened it up. Unfortunately, it was also a DS1287A model, but that was no big deal. I decided to replace the DS1287A as I had a spare. Imagine my surprise and joy when I took the keyboard off to discover that not only was this really a 386 machine (a 1530), but it also had the math coprocessor 30387 chip as well! I replaced the 1287A and this solved the configuration error just fine. But alas, I didn't get a triple crown winner here. The Conner drive was definitely dead. But heck, getting another HDD is easy compared to the other benefits! The original owner of this machine definitely took care of it.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> It runs! Hard Disk is GOOD.
> I did a DS1287 hack to the machine today and ran the wires to a convenient place for the battery. Upon power up it said
> that the RTC was stopped, and it needed setting.
> The "stopped" message threw me, I thought something was wrong with
> the chip. It took an F1 to continue and went right through POST and Autoexec.
> Using TIME and DATE in the GRIDUTIL directory set the RTC.
> Now it boots cleanly.
> Has Lotus123 on the HD.
> I posted updated pics in "Dougs 1530 stuff"... page 2!
> The only remaining issue is that a few keys on the keyboard
> don't work. 123Q and spacebar. From an external kbd everything
> works.
> Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > Thanks so much that was great info. I had no idea on the X2
> > being a rating. May have to try it without them just to
> > make sure the rest of it is still good.
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "fullsizewagon" <andrebakken@> wrote:
> > >
> > > Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
> > > The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > There are two in there that are the same.
> > > > .15uF 250V I think I can replace them.
> > > > Polyprop I think. Radial type in a square package.
> > > > The bottom is clear so you can see the radial shape.
> > > > I have them out already.
> > > > Thanks for the tip on the 1287A
> > > >
> > > > DC
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > >
> > > > > Good Find, DC
> > > > >
> > > > > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> > > > >
> > > > > Phil
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > > > > I'm supposing I can replace these.
> > > > > > Any identification tips welcome, thanks.
> > > > > > There appears to be two of the same caps, would replace both
> > > > > > of course.
> > > > > >
> > > > > > DC
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > does not respond to the power switch. The power supply
> > > > > > > module measures 16.35v so I think its fine (unfortunately,
> > > > > > > that would have been an easy problem isolation!)
> > > > > > > So its something internal. I have the service manuals
> > > > > > > downloaded but I thought maybe I'd get some pointers form
> > > > > > > folks who have already performed cold stone dead diagnosis.
> > > > > > >
> > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > be available for parts/repair!
> > > > > > >
> > > > > > > Thanks in advance,
> > > > > > > DC
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 08 Oct 2012 03:56:55 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Like the hack job? :O
Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
Should I take the kbd apart and clean it (will that likely
fix it?) or look for a replacement?
So what can I do with this thing if I put more mem in it?
Its all accessed funky through expaned mem methods, isn't it?
I have a coprocessor I could put in this but not sure of
the point there.
I think I might like to accomplish getting it on the web.
I'd need the LAN hardware I guess.
Any other ideas?
Oh yeah, one other funny thing. The P.S. has two contact on
it that mate inside the cavity. But one of the two spring contacts
inside is "rubberized", so only the one contact hits metal to metal.
So the P.S. only works using the cord to go from the P.S. into the
radial DC jack. Strange?
DC
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Great job, Doug!
>
> Isn't it nice when you manage to salvage one of these beautiful machines? And yep, that's the way it works.
>
> Once you restore battery power to the 1287A, the CMOS registers are again active. It's just that they're filled with nonsense, so the computer tells you the clock had stopped (which it did), and simply prompts you to reset the time. Once you do that and reboot, everything's hunky-dory.
>
> You can probably find some more 256K sticks somewhere and upgrade the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to hear the HDD is good too.
>
> I recently got a great deal. There was a 1520 on sale on ebay that I looked at, however it was strange. It was definitely branded a 1520, and advertised that way, but the flip up screen said it was a 386 machine. I decided to get it, and it was only about $90 with shipping. When I got the machine, I was very excited when it began to post, because I got a full 8MB of RAM! It of course displayed the configuration error 02 indicating the CMOS battery was dead. So I opened it up. Unfortunately, it was also a DS1287A model, but that was no big deal. I decided to replace the DS1287A as I had a spare. Imagine my surprise and joy when I took the keyboard off to discover that not only was this really a 386 machine (a 1530), but it also had the math coprocessor 30387 chip as well! I replaced the 1287A and this solved the configuration error just fine. But alas, I didn't get a triple crown winner here. The Conner drive was definitely dead. But heck, getting another HDD is easy compared to the other benefits! The original owner of this machine definitely took care of it.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > It runs! Hard Disk is GOOD.
> > I did a DS1287 hack to the machine today and ran the wires to a convenient place for the battery. Upon power up it said
> > that the RTC was stopped, and it needed setting.
> > The "stopped" message threw me, I thought something was wrong with
> > the chip. It took an F1 to continue and went right through POST and Autoexec.
> > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > Now it boots cleanly.
> > Has Lotus123 on the HD.
> > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > The only remaining issue is that a few keys on the keyboard
> > don't work. 123Q and spacebar. From an external kbd everything
> > works.
> > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > Thanks so much that was great info. I had no idea on the X2
> > > being a rating. May have to try it without them just to
> > > make sure the rest of it is still good.
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "fullsizewagon" <andrebakken@> wrote:
> > > >
> > > > Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
> > > > The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > There are two in there that are the same.
> > > > > .15uF 250V I think I can replace them.
> > > > > Polyprop I think. Radial type in a square package.
> > > > > The bottom is clear so you can see the radial shape.
> > > > > I have them out already.
> > > > > Thanks for the tip on the 1287A
> > > > >
> > > > > DC
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > >
> > > > > > Good Find, DC
> > > > > >
> > > > > > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> > > > > >
> > > > > > Phil
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > > > > > I'm supposing I can replace these.
> > > > > > > Any identification tips welcome, thanks.
> > > > > > > There appears to be two of the same caps, would replace both
> > > > > > > of course.
> > > > > > >
> > > > > > > DC
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > > does not respond to the power switch. The power supply
> > > > > > > > module measures 16.35v so I think its fine (unfortunately,
> > > > > > > > that would have been an easy problem isolation!)
> > > > > > > > So its something internal. I have the service manuals
> > > > > > > > downloaded but I thought maybe I'd get some pointers form
> > > > > > > > folks who have already performed cold stone dead diagnosis.
> > > > > > > >
> > > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > > be available for parts/repair!
> > > > > > > >
> > > > > > > > Thanks in advance,
> > > > > > > > DC
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 08 Oct 2012 18:06:57 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Hey, if it works, and you can work the machine like it's supposed to work without it being different than before, then it's elegant engineering. :D
Yeah, its a good grab. I think what happened is that it was always a 386 machine, but someone at the factory slapped a "model 1520" sticker on the screen display accidently. The orignal owner never bothered with it as it obviously made no difference in the performance of the machine. whenever he sold it, the buyer, unaware of what he had, put it up for sale as he saw it, a 1520, not realizing that the "386" on the screen meant it was really a 1530. The 8 MB RAM and the 30387 coprocessor were just gravy, and the new seller had no clue. I got very lucky. :)
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Like the hack job? :O
>
> Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> Should I take the kbd apart and clean it (will that likely
> fix it?) or look for a replacement?
>
> So what can I do with this thing if I put more mem in it?
> Its all accessed funky through expaned mem methods, isn't it?
> I have a coprocessor I could put in this but not sure of
> the point there.
>
> I think I might like to accomplish getting it on the web.
> I'd need the LAN hardware I guess.
> Any other ideas?
>
> Oh yeah, one other funny thing. The P.S. has two contact on
> it that mate inside the cavity. But one of the two spring contacts
> inside is "rubberized", so only the one contact hits metal to metal.
> So the P.S. only works using the cord to go from the P.S. into the
> radial DC jack. Strange?
>
> DC
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > Great job, Doug!
> >
> > Isn't it nice when you manage to salvage one of these beautiful machines? And yep, that's the way it works.
> >
> > Once you restore battery power to the 1287A, the CMOS registers are again active. It's just that they're filled with nonsense, so the computer tells you the clock had stopped (which it did), and simply prompts you to reset the time. Once you do that and reboot, everything's hunky-dory.
> >
> > You can probably find some more 256K sticks somewhere and upgrade the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to hear the HDD is good too.
> >
> > I recently got a great deal. There was a 1520 on sale on ebay that I looked at, however it was strange. It was definitely branded a 1520, and advertised that way, but the flip up screen said it was a 386 machine. I decided to get it, and it was only about $90 with shipping. When I got the machine, I was very excited when it began to post, because I got a full 8MB of RAM! It of course displayed the configuration error 02 indicating the CMOS battery was dead. So I opened it up. Unfortunately, it was also a DS1287A model, but that was no big deal. I decided to replace the DS1287A as I had a spare. Imagine my surprise and joy when I took the keyboard off to discover that not only was this really a 386 machine (a 1530), but it also had the math coprocessor 30387 chip as well! I replaced the 1287A and this solved the configuration error just fine. But alas, I didn't get a triple crown winner here. The Conner drive was definitely dead. But heck, getting another HDD is easy compared to the other benefits! The original owner of this machine definitely took care of it.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > It runs! Hard Disk is GOOD.
> > > I did a DS1287 hack to the machine today and ran the wires to a convenient place for the battery. Upon power up it said
> > > that the RTC was stopped, and it needed setting.
> > > The "stopped" message threw me, I thought something was wrong with
> > > the chip. It took an F1 to continue and went right through POST and Autoexec.
> > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > Now it boots cleanly.
> > > Has Lotus123 on the HD.
> > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > The only remaining issue is that a few keys on the keyboard
> > > don't work. 123Q and spacebar. From an external kbd everything
> > > works.
> > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > Thanks so much that was great info. I had no idea on the X2
> > > > being a rating. May have to try it without them just to
> > > > make sure the rest of it is still good.
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "fullsizewagon" <andrebakken@> wrote:
> > > > >
> > > > > Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
> > > > > The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > There are two in there that are the same.
> > > > > > .15uF 250V I think I can replace them.
> > > > > > Polyprop I think. Radial type in a square package.
> > > > > > The bottom is clear so you can see the radial shape.
> > > > > > I have them out already.
> > > > > > Thanks for the tip on the 1287A
> > > > > >
> > > > > > DC
> > > > > >
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > >
> > > > > > > Good Find, DC
> > > > > > >
> > > > > > > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> > > > > > >
> > > > > > > Phil
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > > > > > > I'm supposing I can replace these.
> > > > > > > > Any identification tips welcome, thanks.
> > > > > > > > There appears to be two of the same caps, would replace both
> > > > > > > > of course.
> > > > > > > >
> > > > > > > > DC
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > > > does not respond to the power switch. The power supply
> > > > > > > > > module measures 16.35v so I think its fine (unfortunately,
> > > > > > > > > that would have been an easy problem isolation!)
> > > > > > > > > So its something internal. I have the service manuals
> > > > > > > > > downloaded but I thought maybe I'd get some pointers form
> > > > > > > > > folks who have already performed cold stone dead diagnosis.
> > > > > > > > >
> > > > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > > > be available for parts/repair!
> > > > > > > > >
> > > > > > > > > Thanks in advance,
> > > > > > > > > DC
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Tue, 09 Oct 2012 02:04:06 -0000
From: "Androgenoide"
Subject: Re: Typical 1500 series failure modes?
I used a Xircom PE3 Ethernet adapter. It converts the parallel port to a NIC... although I've been wondering lately if it might not have made equally good sense to use a device server on the serial port...? And, of course, the Arachne browser... not many choices for a DOS browser are there? I used it to check my Yahoo web mail and I'll have to say that it gave a whole new dimension of meaning to the word "slow." Go ahead, make a pot of tea while it's loading that page, it will be a while.
Sometimes it's fun to do things the hard way. Ran into a web page last week of a guy who was competing with a friend to see who could force Windows XP to run with the least resources. It won't install unless it sees at least 64MB of RAM and a Pentium processor but, once installed you can remove RAM and underclock the machine... He said he got one machine to run with 20MB of RAM with a 20MHz clock and it took a half hour to boot.
I scored an HP 95LX a while back and someday, when I have nothing else to do (Hah!) it might be interesting to see if I can get online with a half meg of RAM and a 1MHz processor... (maybe that Contiki OS/browser could be ported to a 95LX?)... or maybe not...
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Like the hack job? :O
>
> Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> Should I take the kbd apart and clean it (will that likely
> fix it?) or look for a replacement?
>
> So what can I do with this thing if I put more mem in it?
> Its all accessed funky through expaned mem methods, isn't it?
> I have a coprocessor I could put in this but not sure of
> the point there.
>
> I think I might like to accomplish getting it on the web.
> I'd need the LAN hardware I guess.
> Any other ideas?
>
> Oh yeah, one other funny thing. The P.S. has two contact on
> it that mate inside the cavity. But one of the two spring contacts
> inside is "rubberized", so only the one contact hits metal to metal.
> So the P.S. only works using the cord to go from the P.S. into the
> radial DC jack. Strange?
>
> DC
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > Great job, Doug!
> >
> > Isn't it nice when you manage to salvage one of these beautiful machines? And yep, that's the way it works.
> >
> > Once you restore battery power to the 1287A, the CMOS registers are again active. It's just that they're filled with nonsense, so the computer tells you the clock had stopped (which it did), and simply prompts you to reset the time. Once you do that and reboot, everything's hunky-dory.
> >
> > You can probably find some more 256K sticks somewhere and upgrade the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to hear the HDD is good too.
> >
> > I recently got a great deal. There was a 1520 on sale on ebay that I looked at, however it was strange. It was definitely branded a 1520, and advertised that way, but the flip up screen said it was a 386 machine. I decided to get it, and it was only about $90 with shipping. When I got the machine, I was very excited when it began to post, because I got a full 8MB of RAM! It of course displayed the configuration error 02 indicating the CMOS battery was dead. So I opened it up. Unfortunately, it was also a DS1287A model, but that was no big deal. I decided to replace the DS1287A as I had a spare. Imagine my surprise and joy when I took the keyboard off to discover that not only was this really a 386 machine (a 1530), but it also had the math coprocessor 30387 chip as well! I replaced the 1287A and this solved the configuration error just fine. But alas, I didn't get a triple crown winner here. The Conner drive was definitely dead. But heck, getting another HDD is easy compared to the other benefits! The original owner of this machine definitely took care of it.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > It runs! Hard Disk is GOOD.
> > > I did a DS1287 hack to the machine today and ran the wires to a convenient place for the battery. Upon power up it said
> > > that the RTC was stopped, and it needed setting.
> > > The "stopped" message threw me, I thought something was wrong with
> > > the chip. It took an F1 to continue and went right through POST and Autoexec.
> > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > Now it boots cleanly.
> > > Has Lotus123 on the HD.
> > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > The only remaining issue is that a few keys on the keyboard
> > > don't work. 123Q and spacebar. From an external kbd everything
> > > works.
> > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > Thanks so much that was great info. I had no idea on the X2
> > > > being a rating. May have to try it without them just to
> > > > make sure the rest of it is still good.
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "fullsizewagon" <andrebakken@> wrote:
> > > > >
> > > > > Notice that's 250V AC, not DC, which makes a big difference. The X2 also signifies they're an enhanced type meant to go directly across the mains. Be sure to get X2 rated replacements.
> > > > > The PSU will work without those cap's in place, but will radiate more interference/noise out onto the mains.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > There are two in there that are the same.
> > > > > > .15uF 250V I think I can replace them.
> > > > > > Polyprop I think. Radial type in a square package.
> > > > > > The bottom is clear so you can see the radial shape.
> > > > > > I have them out already.
> > > > > > Thanks for the tip on the 1287A
> > > > > >
> > > > > > DC
> > > > > >
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > >
> > > > > > > Good Find, DC
> > > > > > >
> > > > > > > I guess they got burnt to the point where you can't identify the capcity amount. Could you give me the output voltage and amperage? I'll look through my units and see if I can identify them for you.
> > > > > > >
> > > > > > > Phil
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > I posted pictures of what looks like a failed cap in the ext p.s. unit. A stinky melt down!
> > > > > > > > I'm supposing I can replace these.
> > > > > > > > Any identification tips welcome, thanks.
> > > > > > > > There appears to be two of the same caps, would replace both
> > > > > > > > of course.
> > > > > > > >
> > > > > > > > DC
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > > > does not respond to the power switch. The power supply
> > > > > > > > > module measures 16.35v so I think its fine (unfortunately,
> > > > > > > > > that would have been an easy problem isolation!)
> > > > > > > > > So its something internal. I have the service manuals
> > > > > > > > > downloaded but I thought maybe I'd get some pointers form
> > > > > > > > > folks who have already performed cold stone dead diagnosis.
> > > > > > > > >
> > > > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > > > be available for parts/repair!
> > > > > > > > >
> > > > > > > > > Thanks in advance,
> > > > > > > > > DC
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Fri, 12 Oct 2012 02:14:32 -0700
From: jim s
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=ISO-8859-1; format=flowed
On 10/8/2012 7:04 PM, Androgenoide wrote:
>
> I used a Xircom PE3 Ethernet adapter. It converts the parallel port to
> a NIC... although I've been wondering lately if it might not have made
> equally good sense to use a device server on the serial port...? And,
> of course, the Arachne browser... not many choices for a DOS browser
> are there? I used it to check my Yahoo web mail and I'll have to say
> that it gave a whole new dimension of meaning to the word "slow." Go
> ahead, make a pot of tea while it's loading that page, it will be a while.
>
> Sometimes it's fun to do things the hard way. Ran into a web page last
> week of a guy who was competing with a friend to see who could force
> Windows XP to run with the least resources. It won't install unless it
> sees at least 64MB of RAM and a Pentium processor but, once installed
> you can remove RAM and underclock the machine... He said he got one
> machine to run with 20MB of RAM with a 20MHz clock and it took a half
> hour to boot.
>
> I scored an HP 95LX a while back and someday, when I have nothing else
> to do (Hah!) it might be interesting to see if I can get online with a
> half meg of RAM and a 1MHz processor... (maybe that Contiki OS/browser
> could be ported to a 95LX?)... or maybe not...
>
> --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@..."
> <doug@...> wrote:
> >
> > Like the hack job? :O
> >
> > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> > Should I take the kbd apart and clean it (will that likely
> > fix it?) or look for a replacement?
> >
> > So what can I do with this thing if I put more mem in it?
> > Its all accessed funky through expaned mem methods, isn't it?
> > I have a coprocessor I could put in this but not sure of
> > the point there.
> >
> > I think I might like to accomplish getting it on the web.
> > I'd need the LAN hardware I guess.
> > Any other ideas?
> >
> > Oh yeah, one other funny thing. The P.S. has two contact on
> > it that mate inside the cavity. But one of the two spring contacts
> > inside is "rubberized", so only the one contact hits metal to metal.
> > So the P.S. only works using the cord to go from the P.S. into the
> > radial DC jack. Strange?
> >
> > DC
> > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@> wrote:
> > >
> > > Great job, Doug!
> > >
> > > Isn't it nice when you manage to salvage one of these beautiful
> machines? And yep, that's the way it works.
> > >
> > > Once you restore battery power to the 1287A, the CMOS registers
> are again active. It's just that they're filled with nonsense, so the
> computer tells you the clock had stopped (which it did), and simply
> prompts you to reset the time. Once you do that and reboot,
> everything's hunky-dory.
> > >
> > > You can probably find some more 256K sticks somewhere and upgrade
> the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to
> hear the HDD is good too.
> > >
> > > I recently got a great deal. There was a 1520 on sale on ebay that
> I looked at, however it was strange. It was definitely branded a 1520,
> and advertised that way, but the flip up screen said it was a 386
> machine. I decided to get it, and it was only about $90 with shipping.
> When I got the machine, I was very excited when it began to post,
> because I got a full 8MB of RAM! It of course displayed the
> configuration error 02 indicating the CMOS battery was dead. So I
> opened it up. Unfortunately, it was also a DS1287A model, but that was
> no big deal. I decided to replace the DS1287A as I had a spare.
> Imagine my surprise and joy when I took the keyboard off to discover
> that not only was this really a 386 machine (a 1530), but it also had
> the math coprocessor 30387 chip as well! I replaced the 1287A and this
> solved the configuration error just fine. But alas, I didn't get a
> triple crown winner here. The Conner drive was definitely dead. But
> heck, getting another HDD is easy compared to the other benefits! The
> original owner of this machine definitely took care of it.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > >
> > > > It runs! Hard Disk is GOOD.
> > > > I did a DS1287 hack to the machine today and ran the wires to a
> convenient place for the battery. Upon power up it said
> > > > that the RTC was stopped, and it needed setting.
> > > > The "stopped" message threw me, I thought something was wrong with
> > > > the chip. It took an F1 to continue and went right through POST
> and Autoexec.
> > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > Now it boots cleanly.
> > > > Has Lotus123 on the HD.
> > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > The only remaining issue is that a few keys on the keyboard
> > > > don't work. 123Q and spacebar. From an external kbd everything
> > > > works.
> > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a
> half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > Thanks so much that was great info. I had no idea on the X2
> > > > > being a rating. May have to try it without them just to
> > > > > make sure the rest of it is still good.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> <andrebakken@> wrote:
> > > > > >
> > > > > > Notice that's 250V AC, not DC, which makes a big difference.
> The X2 also signifies they're an enhanced type meant to go directly
> across the mains. Be sure to get X2 rated replacements.
> > > > > > The PSU will work without those cap's in place, but will
> radiate more interference/noise out onto the mains.
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > There are two in there that are the same.
> > > > > > > .15uF 250V I think I can replace them.
> > > > > > > Polyprop I think. Radial type in a square package.
> > > > > > > The bottom is clear so you can see the radial shape.
> > > > > > > I have them out already.
> > > > > > > Thanks for the tip on the 1287A
> > > > > > >
> > > > > > > DC
> > > > > > >
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@> wrote:
> > > > > > > >
> > > > > > > > Good Find, DC
> > > > > > > >
> > > > > > > > I guess they got burnt to the point where you can't
> identify the capcity amount. Could you give me the output voltage and
> amperage? I'll look through my units and see if I can identify them
> for you.
> > > > > > > >
> > > > > > > > Phil
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > I posted pictures of what looks like a failed cap in
> the ext p.s. unit. A stinky melt down!
> > > > > > > > > I'm supposing I can replace these.
> > > > > > > > > Any identification tips welcome, thanks.
> > > > > > > > > There appears to be two of the same caps, would
> replace both
> > > > > > > > > of course.
> > > > > > > > >
> > > > > > > > > DC
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > > > > does not respond to the power switch. The power supply
> > > > > > > > > > module measures 16.35v so I think its fine
> (unfortunately,
> > > > > > > > > > that would have been an easy problem isolation!)
> > > > > > > > > > So its something internal. I have the service manuals
> > > > > > > > > > downloaded but I thought maybe I'd get some pointers
> form
> > > > > > > > > > folks who have already performed cold stone dead
> diagnosis.
> > > > > > > > > >
> > > > > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > > > > be available for parts/repair!
> > > > > > > > > >
> > > > > > > > > > Thanks in advance,
> > > > > > > > > > DC
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Since we are on the topic of TCP does anyone have a formula stashed that
can be easily had to run say serial (probably ppp) from something like a
small system like the raspberry pi serially to a system with dos and a
stack? It's been so long since I messed with dos environment networking
I forget.
I think windows of some sort had trumpet to handle part of the equation,
but I don' t have any references right now over a dos stack.
Probably something to do windows 3.1 or win95 / win98 would be better,
but I don't know if the hardware here would be up to those os's.
Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
asking for everything here. Objective is to have something that could
suck off or load a disk image with a floppy boot. I suspect it was a
difficult thing to get going in the day, though, and even wors now.
jim
>
> ,___
>
Date: Fri, 12 Oct 2012 19:37:52 -0000
From: "Androgenoide"
Subject: Re: Typical 1500 series failure modes?
The only real obstacle to DOS networking with the Grid is finding an Ethernet adapter that will work through either the serial or parallel ports. I used the Xircom on the parallel port because I had one at the time. I've got a serial device server now that would probably work too but I've got too much going on at the moment to dig out a Grid just to see what would be required. Either of those solutions would be limited by the speed of the ports(and the Grid itself), of course. Gigabit speeds are out of the question!
Another thought... The guy who put together the Techworm boot disk also had one called Networm, a single floppy that could do a dialup internet connection... (if you still have access to a dialup service... if not, Budget Dial Up has a prepaid service that allows you to buy just a few hours at a time).
Generally speaking, if an old machine has either a serial or parallel port and you can get it to boot into DOS, there is always a way to transfer files to another machine. Even if it has no floppy you can use another DOS machine running Laplink. If it does have a floppy there are a lot of file transfer programs out there, from Kermit to the original version of Procomm that will fit on a single floppy.
The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky and would require some hardware tweaks even to make a slow machine... kind of an extreme project. I've heard of a Linux distro that will fit on a single floppy and run on systems with limited resources (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one seems to want 4MB of RAM.
There are plenty of people on the web who have too much time on their hands and are still playing with machines even older than the Grid... You can still buy new after-market accessories for Commodores, for example, so don't assume that there are no new solutions to old problems.
--- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@...> wrote:
>
> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >
> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port to
> > a NIC... although I've been wondering lately if it might not have made
> > equally good sense to use a device server on the serial port...? And,
> > of course, the Arachne browser... not many choices for a DOS browser
> > are there? I used it to check my Yahoo web mail and I'll have to say
> > that it gave a whole new dimension of meaning to the word "slow." Go
> > ahead, make a pot of tea while it's loading that page, it will be a while.
> >
> > Sometimes it's fun to do things the hard way. Ran into a web page last
> > week of a guy who was competing with a friend to see who could force
> > Windows XP to run with the least resources. It won't install unless it
> > sees at least 64MB of RAM and a Pentium processor but, once installed
> > you can remove RAM and underclock the machine... He said he got one
> > machine to run with 20MB of RAM with a 20MHz clock and it took a half
> > hour to boot.
> >
> > I scored an HP 95LX a while back and someday, when I have nothing else
> > to do (Hah!) it might be interesting to see if I can get online with a
> > half meg of RAM and a 1MHz processor... (maybe that Contiki OS/browser
> > could be ported to a 95LX?)... or maybe not...
> >
> > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > <doug@> wrote:
> > >
> > > Like the hack job? :O
> > >
> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> > > Should I take the kbd apart and clean it (will that likely
> > > fix it?) or look for a replacement?
> > >
> > > So what can I do with this thing if I put more mem in it?
> > > Its all accessed funky through expaned mem methods, isn't it?
> > > I have a coprocessor I could put in this but not sure of
> > > the point there.
> > >
> > > I think I might like to accomplish getting it on the web.
> > > I'd need the LAN hardware I guess.
> > > Any other ideas?
> > >
> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > it that mate inside the cavity. But one of the two spring contacts
> > > inside is "rubberized", so only the one contact hits metal to metal.
> > > So the P.S. only works using the cord to go from the P.S. into the
> > > radial DC jack. Strange?
> > >
> > > DC
> > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@> wrote:
> > > >
> > > > Great job, Doug!
> > > >
> > > > Isn't it nice when you manage to salvage one of these beautiful
> > machines? And yep, that's the way it works.
> > > >
> > > > Once you restore battery power to the 1287A, the CMOS registers
> > are again active. It's just that they're filled with nonsense, so the
> > computer tells you the clock had stopped (which it did), and simply
> > prompts you to reset the time. Once you do that and reboot,
> > everything's hunky-dory.
> > > >
> > > > You can probably find some more 256K sticks somewhere and upgrade
> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to
> > hear the HDD is good too.
> > > >
> > > > I recently got a great deal. There was a 1520 on sale on ebay that
> > I looked at, however it was strange. It was definitely branded a 1520,
> > and advertised that way, but the flip up screen said it was a 386
> > machine. I decided to get it, and it was only about $90 with shipping.
> > When I got the machine, I was very excited when it began to post,
> > because I got a full 8MB of RAM! It of course displayed the
> > configuration error 02 indicating the CMOS battery was dead. So I
> > opened it up. Unfortunately, it was also a DS1287A model, but that was
> > no big deal. I decided to replace the DS1287A as I had a spare.
> > Imagine my surprise and joy when I took the keyboard off to discover
> > that not only was this really a 386 machine (a 1530), but it also had
> > the math coprocessor 30387 chip as well! I replaced the 1287A and this
> > solved the configuration error just fine. But alas, I didn't get a
> > triple crown winner here. The Conner drive was definitely dead. But
> > heck, getting another HDD is easy compared to the other benefits! The
> > original owner of this machine definitely took care of it.
> > > >
> > > > Phil
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > It runs! Hard Disk is GOOD.
> > > > > I did a DS1287 hack to the machine today and ran the wires to a
> > convenient place for the battery. Upon power up it said
> > > > > that the RTC was stopped, and it needed setting.
> > > > > The "stopped" message threw me, I thought something was wrong with
> > > > > the chip. It took an F1 to continue and went right through POST
> > and Autoexec.
> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > > Now it boots cleanly.
> > > > > Has Lotus123 on the HD.
> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > > The only remaining issue is that a few keys on the keyboard
> > > > > don't work. 123Q and spacebar. From an external kbd everything
> > > > > works.
> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a
> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > Thanks so much that was great info. I had no idea on the X2
> > > > > > being a rating. May have to try it without them just to
> > > > > > make sure the rest of it is still good.
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > <andrebakken@> wrote:
> > > > > > >
> > > > > > > Notice that's 250V AC, not DC, which makes a big difference.
> > The X2 also signifies they're an enhanced type meant to go directly
> > across the mains. Be sure to get X2 rated replacements.
> > > > > > > The PSU will work without those cap's in place, but will
> > radiate more interference/noise out onto the mains.
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > There are two in there that are the same.
> > > > > > > > .15uF 250V I think I can replace them.
> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > > > > > I have them out already.
> > > > > > > > Thanks for the tip on the 1287A
> > > > > > > >
> > > > > > > > DC
> > > > > > > >
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@> wrote:
> > > > > > > > >
> > > > > > > > > Good Find, DC
> > > > > > > > >
> > > > > > > > > I guess they got burnt to the point where you can't
> > identify the capcity amount. Could you give me the output voltage and
> > amperage? I'll look through my units and see if I can identify them
> > for you.
> > > > > > > > >
> > > > > > > > > Phil
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > I posted pictures of what looks like a failed cap in
> > the ext p.s. unit. A stinky melt down!
> > > > > > > > > > I'm supposing I can replace these.
> > > > > > > > > > Any identification tips welcome, thanks.
> > > > > > > > > > There appears to be two of the same caps, would
> > replace both
> > > > > > > > > > of course.
> > > > > > > > > >
> > > > > > > > > > DC
> > > > > > > > > >
> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > > > >
> > > > > > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > > > > > does not respond to the power switch. The power supply
> > > > > > > > > > > module measures 16.35v so I think its fine
> > (unfortunately,
> > > > > > > > > > > that would have been an easy problem isolation!)
> > > > > > > > > > > So its something internal. I have the service manuals
> > > > > > > > > > > downloaded but I thought maybe I'd get some pointers
> > form
> > > > > > > > > > > folks who have already performed cold stone dead
> > diagnosis.
> > > > > > > > > > >
> > > > > > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > > > > > be available for parts/repair!
> > > > > > > > > > >
> > > > > > > > > > > Thanks in advance,
> > > > > > > > > > > DC
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
> Since we are on the topic of TCP does anyone have a formula stashed that
> can be easily had to run say serial (probably ppp) from something like a
> small system like the raspberry pi serially to a system with dos and a
> stack? It's been so long since I messed with dos environment networking
> I forget.
>
> I think windows of some sort had trumpet to handle part of the equation,
> but I don' t have any references right now over a dos stack.
>
> Probably something to do windows 3.1 or win95 / win98 would be better,
> but I don't know if the hardware here would be up to those os's.
>
> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
> asking for everything here. Objective is to have something that could
> suck off or load a disk image with a floppy boot. I suspect it was a
> difficult thing to get going in the day, though, and even wors now.
>
> jim
> >
> > ,___
> >
>
Date: Sat, 13 Oct 2012 15:10:42 -0000
From: "Androgenoide"
Subject: Re: Typical 1500 series failure modes?
Further thoughts on an OS... Microsoft says that a Win95 installation requires a 386DX, 4MB of RAM and more than 40MB of HDD but I ran into a site some years ago in which a guy described removing files one by one until he got the absolute minimum Win95 system that would still boot... it came out to about 8MB... don't remember him saying anything about RAM requirements, though.
OS/2 Warp 3 requirements are similar to Win95, as far as I know... Warp 2 or earlier might be more forgiving but I don't have a copy to examine so I can't say.
As for desktop software... it might be interesting to look for PC GEOS... a pretty full-featured office suite in a small package.
--- In RuGRiD-Laptop@yahoogroups.com, "Androgenoide" <androgenoide@...> wrote:
>
> The only real obstacle to DOS networking with the Grid is finding an Ethernet adapter that will work through either the serial or parallel ports. I used the Xircom on the parallel port because I had one at the time. I've got a serial device server now that would probably work too but I've got too much going on at the moment to dig out a Grid just to see what would be required. Either of those solutions would be limited by the speed of the ports(and the Grid itself), of course. Gigabit speeds are out of the question!
> Another thought... The guy who put together the Techworm boot disk also had one called Networm, a single floppy that could do a dialup internet connection... (if you still have access to a dialup service... if not, Budget Dial Up has a prepaid service that allows you to buy just a few hours at a time).
>
> Generally speaking, if an old machine has either a serial or parallel port and you can get it to boot into DOS, there is always a way to transfer files to another machine. Even if it has no floppy you can use another DOS machine running Laplink. If it does have a floppy there are a lot of file transfer programs out there, from Kermit to the original version of Procomm that will fit on a single floppy.
>
> The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky and would require some hardware tweaks even to make a slow machine... kind of an extreme project. I've heard of a Linux distro that will fit on a single floppy and run on systems with limited resources (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one seems to want 4MB of RAM.
>
> There are plenty of people on the web who have too much time on their hands and are still playing with machines even older than the Grid... You can still buy new after-market accessories for Commodores, for example, so don't assume that there are no new solutions to old problems.
>
>
>
>
>
>
>
>
>
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> >
> > On 10/8/2012 7:04 PM, Androgenoide wrote:
> > >
> > > I used a Xircom PE3 Ethernet adapter. It converts the parallel port to
> > > a NIC... although I've been wondering lately if it might not have made
> > > equally good sense to use a device server on the serial port...? And,
> > > of course, the Arachne browser... not many choices for a DOS browser
> > > are there? I used it to check my Yahoo web mail and I'll have to say
> > > that it gave a whole new dimension of meaning to the word "slow." Go
> > > ahead, make a pot of tea while it's loading that page, it will be a while.
> > >
> > > Sometimes it's fun to do things the hard way. Ran into a web page last
> > > week of a guy who was competing with a friend to see who could force
> > > Windows XP to run with the least resources. It won't install unless it
> > > sees at least 64MB of RAM and a Pentium processor but, once installed
> > > you can remove RAM and underclock the machine... He said he got one
> > > machine to run with 20MB of RAM with a 20MHz clock and it took a half
> > > hour to boot.
> > >
> > > I scored an HP 95LX a while back and someday, when I have nothing else
> > > to do (Hah!) it might be interesting to see if I can get online with a
> > > half meg of RAM and a 1MHz processor... (maybe that Contiki OS/browser
> > > could be ported to a 95LX?)... or maybe not...
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > <doug@> wrote:
> > > >
> > > > Like the hack job? :O
> > > >
> > > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> > > > Should I take the kbd apart and clean it (will that likely
> > > > fix it?) or look for a replacement?
> > > >
> > > > So what can I do with this thing if I put more mem in it?
> > > > Its all accessed funky through expaned mem methods, isn't it?
> > > > I have a coprocessor I could put in this but not sure of
> > > > the point there.
> > > >
> > > > I think I might like to accomplish getting it on the web.
> > > > I'd need the LAN hardware I guess.
> > > > Any other ideas?
> > > >
> > > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > it that mate inside the cavity. But one of the two spring contacts
> > > > inside is "rubberized", so only the one contact hits metal to metal.
> > > > So the P.S. only works using the cord to go from the P.S. into the
> > > > radial DC jack. Strange?
> > > >
> > > > DC
> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@> wrote:
> > > > >
> > > > > Great job, Doug!
> > > > >
> > > > > Isn't it nice when you manage to salvage one of these beautiful
> > > machines? And yep, that's the way it works.
> > > > >
> > > > > Once you restore battery power to the 1287A, the CMOS registers
> > > are again active. It's just that they're filled with nonsense, so the
> > > computer tells you the clock had stopped (which it did), and simply
> > > prompts you to reset the time. Once you do that and reboot,
> > > everything's hunky-dory.
> > > > >
> > > > > You can probably find some more 256K sticks somewhere and upgrade
> > > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to
> > > hear the HDD is good too.
> > > > >
> > > > > I recently got a great deal. There was a 1520 on sale on ebay that
> > > I looked at, however it was strange. It was definitely branded a 1520,
> > > and advertised that way, but the flip up screen said it was a 386
> > > machine. I decided to get it, and it was only about $90 with shipping.
> > > When I got the machine, I was very excited when it began to post,
> > > because I got a full 8MB of RAM! It of course displayed the
> > > configuration error 02 indicating the CMOS battery was dead. So I
> > > opened it up. Unfortunately, it was also a DS1287A model, but that was
> > > no big deal. I decided to replace the DS1287A as I had a spare.
> > > Imagine my surprise and joy when I took the keyboard off to discover
> > > that not only was this really a 386 machine (a 1530), but it also had
> > > the math coprocessor 30387 chip as well! I replaced the 1287A and this
> > > solved the configuration error just fine. But alas, I didn't get a
> > > triple crown winner here. The Conner drive was definitely dead. But
> > > heck, getting another HDD is easy compared to the other benefits! The
> > > original owner of this machine definitely took care of it.
> > > > >
> > > > > Phil
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > It runs! Hard Disk is GOOD.
> > > > > > I did a DS1287 hack to the machine today and ran the wires to a
> > > convenient place for the battery. Upon power up it said
> > > > > > that the RTC was stopped, and it needed setting.
> > > > > > The "stopped" message threw me, I thought something was wrong with
> > > > > > the chip. It took an F1 to continue and went right through POST
> > > and Autoexec.
> > > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > > > Now it boots cleanly.
> > > > > > Has Lotus123 on the HD.
> > > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > > > The only remaining issue is that a few keys on the keyboard
> > > > > > don't work. 123Q and spacebar. From an external kbd everything
> > > > > > works.
> > > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a
> > > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > > >
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > Thanks so much that was great info. I had no idea on the X2
> > > > > > > being a rating. May have to try it without them just to
> > > > > > > make sure the rest of it is still good.
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > <andrebakken@> wrote:
> > > > > > > >
> > > > > > > > Notice that's 250V AC, not DC, which makes a big difference.
> > > The X2 also signifies they're an enhanced type meant to go directly
> > > across the mains. Be sure to get X2 rated replacements.
> > > > > > > > The PSU will work without those cap's in place, but will
> > > radiate more interference/noise out onto the mains.
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > There are two in there that are the same.
> > > > > > > > > .15uF 250V I think I can replace them.
> > > > > > > > > Polyprop I think. Radial type in a square package.
> > > > > > > > > The bottom is clear so you can see the radial shape.
> > > > > > > > > I have them out already.
> > > > > > > > > Thanks for the tip on the 1287A
> > > > > > > > >
> > > > > > > > > DC
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@> wrote:
> > > > > > > > > >
> > > > > > > > > > Good Find, DC
> > > > > > > > > >
> > > > > > > > > > I guess they got burnt to the point where you can't
> > > identify the capcity amount. Could you give me the output voltage and
> > > amperage? I'll look through my units and see if I can identify them
> > > for you.
> > > > > > > > > >
> > > > > > > > > > Phil
> > > > > > > > > >
> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > > > >
> > > > > > > > > > > I posted pictures of what looks like a failed cap in
> > > the ext p.s. unit. A stinky melt down!
> > > > > > > > > > > I'm supposing I can replace these.
> > > > > > > > > > > Any identification tips welcome, thanks.
> > > > > > > > > > > There appears to be two of the same caps, would
> > > replace both
> > > > > > > > > > > of course.
> > > > > > > > > > >
> > > > > > > > > > > DC
> > > > > > > > > > >
> > > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@> wrote:
> > > > > > > > > > > >
> > > > > > > > > > > > I am considering tackling the repair of a 1530 that
> > > > > > > > > > > > does not respond to the power switch. The power supply
> > > > > > > > > > > > module measures 16.35v so I think its fine
> > > (unfortunately,
> > > > > > > > > > > > that would have been an easy problem isolation!)
> > > > > > > > > > > > So its something internal. I have the service manuals
> > > > > > > > > > > > downloaded but I thought maybe I'd get some pointers
> > > form
> > > > > > > > > > > > folks who have already performed cold stone dead
> > > diagnosis.
> > > > > > > > > > > >
> > > > > > > > > > > > If I don't dive into this FYI this very clean 1530 will
> > > > > > > > > > > > be available for parts/repair!
> > > > > > > > > > > >
> > > > > > > > > > > > Thanks in advance,
> > > > > > > > > > > > DC
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> > Since we are on the topic of TCP does anyone have a formula stashed that
> > can be easily had to run say serial (probably ppp) from something like a
> > small system like the raspberry pi serially to a system with dos and a
> > stack? It's been so long since I messed with dos environment networking
> > I forget.
> >
> > I think windows of some sort had trumpet to handle part of the equation,
> > but I don' t have any references right now over a dos stack.
> >
> > Probably something to do windows 3.1 or win95 / win98 would be better,
> > but I don't know if the hardware here would be up to those os's.
> >
> > Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
> > asking for everything here. Objective is to have something that could
> > suck off or load a disk image with a floppy boot. I suspect it was a
> > difficult thing to get going in the day, though, and even wors now.
> >
> > jim
> > >
> > > ,___
> > >
> >
>
Date: Sat, 13 Oct 2012 12:02:55 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
I don't think I'd even bother with the serial port. You might get
230,400bps out of it if it has one of the fancier UARTs, but even a 16550AFN
will only give you 115,200bps. And, if it's an 8250A/16450 UART, you have
to slow it down with CTS/RTS handshaking. I think the standard parallel
port will give you around 5Mbps, won't it? Maybe a tad faster with
IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but even
if you could directly tie in to the ISA bus, it would be tough.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "Androgenoide" <androgenoide@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Friday, October 12, 2012 3:37 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> The only real obstacle to DOS networking with the Grid is finding an
> Ethernet adapter that will work through either the serial or parallel
> ports. I used the Xircom on the parallel port because I had one at the
> time. I've got a serial device server now that would probably work too
> but I've got too much going on at the moment to dig out a Grid just to see
> what would be required. Either of those solutions would be limited by
> the speed of the ports(and the Grid itself), of course. Gigabit speeds
> are out of the question!
> Another thought... The guy who put together the Techworm boot disk also
> had one called Networm, a single floppy that could do a dialup internet
> connection... (if you still have access to a dialup service... if not,
> Budget Dial Up has a prepaid service that allows you to buy just a few
> hours at a time).
>
> Generally speaking, if an old machine has either a serial or parallel port
> and you can get it to boot into DOS, there is always a way to transfer
> files to another machine. Even if it has no floppy you can use another
> DOS machine running Laplink. If it does have a floppy there are a lot of
> file transfer programs out there, from Kermit to the original version of
> Procomm that will fit on a single floppy.
>
> The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full
> install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky and
> would require some hardware tweaks even to make a slow machine... kind of
> an extreme project. I've heard of a Linux distro that will fit on a
> single floppy and run on systems with limited resources
> (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one
> seems to want 4MB of RAM.
>
> There are plenty of people on the web who have too much time on their
> hands and are still playing with machines even older than the Grid... You
> can still buy new after-market accessories for Commodores, for example, so
> don't assume that there are no new solutions to old problems.
>
>
>
>
>
>
>
>
>
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@...> wrote:
>>
>> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >
>> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port to
>> > a NIC... although I've been wondering lately if it might not have made
>> > equally good sense to use a device server on the serial port...? And,
>> > of course, the Arachne browser... not many choices for a DOS browser
>> > are there? I used it to check my Yahoo web mail and I'll have to say
>> > that it gave a whole new dimension of meaning to the word "slow." Go
>> > ahead, make a pot of tea while it's loading that page, it will be a
>> > while.
>> >
>> > Sometimes it's fun to do things the hard way. Ran into a web page last
>> > week of a guy who was competing with a friend to see who could force
>> > Windows XP to run with the least resources. It won't install unless it
>> > sees at least 64MB of RAM and a Pentium processor but, once installed
>> > you can remove RAM and underclock the machine... He said he got one
>> > machine to run with 20MB of RAM with a 20MHz clock and it took a half
>> > hour to boot.
>> >
>> > I scored an HP 95LX a while back and someday, when I have nothing else
>> > to do (Hah!) it might be interesting to see if I can get online with a
>> > half meg of RAM and a 1MHz processor... (maybe that Contiki OS/browser
>> > could be ported to a 95LX?)... or maybe not...
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> > <doug@> wrote:
>> > >
>> > > Like the hack job? :O
>> > >
>> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
>> > > Should I take the kbd apart and clean it (will that likely
>> > > fix it?) or look for a replacement?
>> > >
>> > > So what can I do with this thing if I put more mem in it?
>> > > Its all accessed funky through expaned mem methods, isn't it?
>> > > I have a coprocessor I could put in this but not sure of
>> > > the point there.
>> > >
>> > > I think I might like to accomplish getting it on the web.
>> > > I'd need the LAN hardware I guess.
>> > > Any other ideas?
>> > >
>> > > Oh yeah, one other funny thing. The P.S. has two contact on
>> > > it that mate inside the cavity. But one of the two spring contacts
>> > > inside is "rubberized", so only the one contact hits metal to metal.
>> > > So the P.S. only works using the cord to go from the P.S. into the
>> > > radial DC jack. Strange?
>> > >
>> > > DC
>> > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
>> > wrote:
>> > > >
>> > > > Great job, Doug!
>> > > >
>> > > > Isn't it nice when you manage to salvage one of these beautiful
>> > machines? And yep, that's the way it works.
>> > > >
>> > > > Once you restore battery power to the 1287A, the CMOS registers
>> > are again active. It's just that they're filled with nonsense, so the
>> > computer tells you the clock had stopped (which it did), and simply
>> > prompts you to reset the time. Once you do that and reboot,
>> > everything's hunky-dory.
>> > > >
>> > > > You can probably find some more 256K sticks somewhere and upgrade
>> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to
>> > hear the HDD is good too.
>> > > >
>> > > > I recently got a great deal. There was a 1520 on sale on ebay that
>> > I looked at, however it was strange. It was definitely branded a 1520,
>> > and advertised that way, but the flip up screen said it was a 386
>> > machine. I decided to get it, and it was only about $90 with shipping.
>> > When I got the machine, I was very excited when it began to post,
>> > because I got a full 8MB of RAM! It of course displayed the
>> > configuration error 02 indicating the CMOS battery was dead. So I
>> > opened it up. Unfortunately, it was also a DS1287A model, but that was
>> > no big deal. I decided to replace the DS1287A as I had a spare.
>> > Imagine my surprise and joy when I took the keyboard off to discover
>> > that not only was this really a 386 machine (a 1530), but it also had
>> > the math coprocessor 30387 chip as well! I replaced the 1287A and this
>> > solved the configuration error just fine. But alas, I didn't get a
>> > triple crown winner here. The Conner drive was definitely dead. But
>> > heck, getting another HDD is easy compared to the other benefits! The
>> > original owner of this machine definitely took care of it.
>> > > >
>> > > > Phil
>> > > >
>> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> > wrote:
>> > > > >
>> > > > > It runs! Hard Disk is GOOD.
>> > > > > I did a DS1287 hack to the machine today and ran the wires to a
>> > convenient place for the battery. Upon power up it said
>> > > > > that the RTC was stopped, and it needed setting.
>> > > > > The "stopped" message threw me, I thought something was wrong
>> > > > > with
>> > > > > the chip. It took an F1 to continue and went right through POST
>> > and Autoexec.
>> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
>> > > > > Now it boots cleanly.
>> > > > > Has Lotus123 on the HD.
>> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
>> > > > > The only remaining issue is that a few keys on the keyboard
>> > > > > don't work. 123Q and spacebar. From an external kbd everything
>> > > > > works.
>> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a
>> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>> > > > >
>> > > > >
>> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> > wrote:
>> > > > > >
>> > > > > > Thanks so much that was great info. I had no idea on the X2
>> > > > > > being a rating. May have to try it without them just to
>> > > > > > make sure the rest of it is still good.
>> > > > > >
>> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
>> > <andrebakken@> wrote:
>> > > > > > >
>> > > > > > > Notice that's 250V AC, not DC, which makes a big difference.
>> > The X2 also signifies they're an enhanced type meant to go directly
>> > across the mains. Be sure to get X2 rated replacements.
>> > > > > > > The PSU will work without those cap's in place, but will
>> > radiate more interference/noise out onto the mains.
>> > > > > > >
>> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> > wrote:
>> > > > > > > >
>> > > > > > > > There are two in there that are the same.
>> > > > > > > > .15uF 250V I think I can replace them.
>> > > > > > > > Polyprop I think. Radial type in a square package.
>> > > > > > > > The bottom is clear so you can see the radial shape.
>> > > > > > > > I have them out already.
>> > > > > > > > Thanks for the tip on the 1287A
>> > > > > > > >
>> > > > > > > > DC
>> > > > > > > >
>> > > > > > > >
>> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
>> > wrote:
>> > > > > > > > >
>> > > > > > > > > Good Find, DC
>> > > > > > > > >
>> > > > > > > > > I guess they got burnt to the point where you can't
>> > identify the capcity amount. Could you give me the output voltage and
>> > amperage? I'll look through my units and see if I can identify them
>> > for you.
>> > > > > > > > >
>> > > > > > > > > Phil
>> > > > > > > > >
>> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> > wrote:
>> > > > > > > > > >
>> > > > > > > > > > I posted pictures of what looks like a failed cap in
>> > the ext p.s. unit. A stinky melt down!
>> > > > > > > > > > I'm supposing I can replace these.
>> > > > > > > > > > Any identification tips welcome, thanks.
>> > > > > > > > > > There appears to be two of the same caps, would
>> > replace both
>> > > > > > > > > > of course.
>> > > > > > > > > >
>> > > > > > > > > > DC
>> > > > > > > > > >
>> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> > wrote:
>> > > > > > > > > > >
>> > > > > > > > > > > I am considering tackling the repair of a 1530 that
>> > > > > > > > > > > does not respond to the power switch. The power
>> > > > > > > > > > > supply
>> > > > > > > > > > > module measures 16.35v so I think its fine
>> > (unfortunately,
>> > > > > > > > > > > that would have been an easy problem isolation!)
>> > > > > > > > > > > So its something internal. I have the service manuals
>> > > > > > > > > > > downloaded but I thought maybe I'd get some pointers
>> > form
>> > > > > > > > > > > folks who have already performed cold stone dead
>> > diagnosis.
>> > > > > > > > > > >
>> > > > > > > > > > > If I don't dive into this FYI this very clean 1530
>> > > > > > > > > > > will
>> > > > > > > > > > > be available for parts/repair!
>> > > > > > > > > > >
>> > > > > > > > > > > Thanks in advance,
>> > > > > > > > > > > DC
>> > > > > > > > > > >
>> > > > > > > > > >
>> > > > > > > > >
>> > > > > > > >
>> > > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>>
>> Since we are on the topic of TCP does anyone have a formula stashed that
>> can be easily had to run say serial (probably ppp) from something like a
>> small system like the raspberry pi serially to a system with dos and a
>> stack? It's been so long since I messed with dos environment networking
>> I forget.
>>
>> I think windows of some sort had trumpet to handle part of the equation,
>> but I don' t have any references right now over a dos stack.
>>
>> Probably something to do windows 3.1 or win95 / win98 would be better,
>> but I don't know if the hardware here would be up to those os's.
>>
>> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
>> asking for everything here. Objective is to have something that could
>> suck off or load a disk image with a floppy boot. I suspect it was a
>> difficult thing to get going in the day, though, and even wors now.
>>
>> jim
>> >
>> > ,___
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Sun, 14 Oct 2012 23:48:33 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Agreed! The Xircom Parallel port 10bT is available but has limited driver support.
Other similar devices don't seem to be on the used market right not.
I'm also considering a parallel based disk drive at this point.
Yes, ISA itself would have a hard time saturating 10bT I think... I didn't actually run the numbers.
DC
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> I don't think I'd even bother with the serial port. You might get
> 230,400bps out of it if it has one of the fancier UARTs, but even a 16550AFN
> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you have
> to slow it down with CTS/RTS handshaking. I think the standard parallel
> port will give you around 5Mbps, won't it? Maybe a tad faster with
> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but even
> if you could directly tie in to the ISA bus, it would be tough.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: "Androgenoide" <androgenoide@...>
> To: <RuGRiD-Laptop@yahoogroups.com>
> Sent: Friday, October 12, 2012 3:37 PM
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> > The only real obstacle to DOS networking with the Grid is finding an
> > Ethernet adapter that will work through either the serial or parallel
> > ports. I used the Xircom on the parallel port because I had one at the
> > time. I've got a serial device server now that would probably work too
> > but I've got too much going on at the moment to dig out a Grid just to see
> > what would be required. Either of those solutions would be limited by
> > the speed of the ports(and the Grid itself), of course. Gigabit speeds
> > are out of the question!
> > Another thought... The guy who put together the Techworm boot disk also
> > had one called Networm, a single floppy that could do a dialup internet
> > connection... (if you still have access to a dialup service... if not,
> > Budget Dial Up has a prepaid service that allows you to buy just a few
> > hours at a time).
> >
> > Generally speaking, if an old machine has either a serial or parallel port
> > and you can get it to boot into DOS, there is always a way to transfer
> > files to another machine. Even if it has no floppy you can use another
> > DOS machine running Laplink. If it does have a floppy there are a lot of
> > file transfer programs out there, from Kermit to the original version of
> > Procomm that will fit on a single floppy.
> >
> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full
> > install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky and
> > would require some hardware tweaks even to make a slow machine... kind of
> > an extreme project. I've heard of a Linux distro that will fit on a
> > single floppy and run on systems with limited resources
> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one
> > seems to want 4MB of RAM.
> >
> > There are plenty of people on the web who have too much time on their
> > hands and are still playing with machines even older than the Grid... You
> > can still buy new after-market accessories for Commodores, for example, so
> > don't assume that there are no new solutions to old problems.
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> >>
> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >> >
> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port to
> >> > a NIC... although I've been wondering lately if it might not have made
> >> > equally good sense to use a device server on the serial port...? And,
> >> > of course, the Arachne browser... not many choices for a DOS browser
> >> > are there? I used it to check my Yahoo web mail and I'll have to say
> >> > that it gave a whole new dimension of meaning to the word "slow." Go
> >> > ahead, make a pot of tea while it's loading that page, it will be a
> >> > while.
> >> >
> >> > Sometimes it's fun to do things the hard way. Ran into a web page last
> >> > week of a guy who was competing with a friend to see who could force
> >> > Windows XP to run with the least resources. It won't install unless it
> >> > sees at least 64MB of RAM and a Pentium processor but, once installed
> >> > you can remove RAM and underclock the machine... He said he got one
> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a half
> >> > hour to boot.
> >> >
> >> > I scored an HP 95LX a while back and someday, when I have nothing else
> >> > to do (Hah!) it might be interesting to see if I can get online with a
> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki OS/browser
> >> > could be ported to a 95LX?)... or maybe not...
> >> >
> >> > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> >> > <doug@> wrote:
> >> > >
> >> > > Like the hack job? :O
> >> > >
> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> >> > > Should I take the kbd apart and clean it (will that likely
> >> > > fix it?) or look for a replacement?
> >> > >
> >> > > So what can I do with this thing if I put more mem in it?
> >> > > Its all accessed funky through expaned mem methods, isn't it?
> >> > > I have a coprocessor I could put in this but not sure of
> >> > > the point there.
> >> > >
> >> > > I think I might like to accomplish getting it on the web.
> >> > > I'd need the LAN hardware I guess.
> >> > > Any other ideas?
> >> > >
> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> >> > > it that mate inside the cavity. But one of the two spring contacts
> >> > > inside is "rubberized", so only the one contact hits metal to metal.
> >> > > So the P.S. only works using the cord to go from the P.S. into the
> >> > > radial DC jack. Strange?
> >> > >
> >> > > DC
> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
> >> > wrote:
> >> > > >
> >> > > > Great job, Doug!
> >> > > >
> >> > > > Isn't it nice when you manage to salvage one of these beautiful
> >> > machines? And yep, that's the way it works.
> >> > > >
> >> > > > Once you restore battery power to the 1287A, the CMOS registers
> >> > are again active. It's just that they're filled with nonsense, so the
> >> > computer tells you the clock had stopped (which it did), and simply
> >> > prompts you to reset the time. Once you do that and reboot,
> >> > everything's hunky-dory.
> >> > > >
> >> > > > You can probably find some more 256K sticks somewhere and upgrade
> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great to
> >> > hear the HDD is good too.
> >> > > >
> >> > > > I recently got a great deal. There was a 1520 on sale on ebay that
> >> > I looked at, however it was strange. It was definitely branded a 1520,
> >> > and advertised that way, but the flip up screen said it was a 386
> >> > machine. I decided to get it, and it was only about $90 with shipping.
> >> > When I got the machine, I was very excited when it began to post,
> >> > because I got a full 8MB of RAM! It of course displayed the
> >> > configuration error 02 indicating the CMOS battery was dead. So I
> >> > opened it up. Unfortunately, it was also a DS1287A model, but that was
> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> >> > Imagine my surprise and joy when I took the keyboard off to discover
> >> > that not only was this really a 386 machine (a 1530), but it also had
> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and this
> >> > solved the configuration error just fine. But alas, I didn't get a
> >> > triple crown winner here. The Conner drive was definitely dead. But
> >> > heck, getting another HDD is easy compared to the other benefits! The
> >> > original owner of this machine definitely took care of it.
> >> > > >
> >> > > > Phil
> >> > > >
> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> > wrote:
> >> > > > >
> >> > > > > It runs! Hard Disk is GOOD.
> >> > > > > I did a DS1287 hack to the machine today and ran the wires to a
> >> > convenient place for the battery. Upon power up it said
> >> > > > > that the RTC was stopped, and it needed setting.
> >> > > > > The "stopped" message threw me, I thought something was wrong
> >> > > > > with
> >> > > > > the chip. It took an F1 to continue and went right through POST
> >> > and Autoexec.
> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> >> > > > > Now it boots cleanly.
> >> > > > > Has Lotus123 on the HD.
> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> >> > > > > The only remaining issue is that a few keys on the keyboard
> >> > > > > don't work. 123Q and spacebar. From an external kbd everything
> >> > > > > works.
> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM, a
> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> >> > > > >
> >> > > > >
> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> > wrote:
> >> > > > > >
> >> > > > > > Thanks so much that was great info. I had no idea on the X2
> >> > > > > > being a rating. May have to try it without them just to
> >> > > > > > make sure the rest of it is still good.
> >> > > > > >
> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> >> > <andrebakken@> wrote:
> >> > > > > > >
> >> > > > > > > Notice that's 250V AC, not DC, which makes a big difference.
> >> > The X2 also signifies they're an enhanced type meant to go directly
> >> > across the mains. Be sure to get X2 rated replacements.
> >> > > > > > > The PSU will work without those cap's in place, but will
> >> > radiate more interference/noise out onto the mains.
> >> > > > > > >
> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> > wrote:
> >> > > > > > > >
> >> > > > > > > > There are two in there that are the same.
> >> > > > > > > > .15uF 250V I think I can replace them.
> >> > > > > > > > Polyprop I think. Radial type in a square package.
> >> > > > > > > > The bottom is clear so you can see the radial shape.
> >> > > > > > > > I have them out already.
> >> > > > > > > > Thanks for the tip on the 1287A
> >> > > > > > > >
> >> > > > > > > > DC
> >> > > > > > > >
> >> > > > > > > >
> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
> >> > wrote:
> >> > > > > > > > >
> >> > > > > > > > > Good Find, DC
> >> > > > > > > > >
> >> > > > > > > > > I guess they got burnt to the point where you can't
> >> > identify the capcity amount. Could you give me the output voltage and
> >> > amperage? I'll look through my units and see if I can identify them
> >> > for you.
> >> > > > > > > > >
> >> > > > > > > > > Phil
> >> > > > > > > > >
> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> > wrote:
> >> > > > > > > > > >
> >> > > > > > > > > > I posted pictures of what looks like a failed cap in
> >> > the ext p.s. unit. A stinky melt down!
> >> > > > > > > > > > I'm supposing I can replace these.
> >> > > > > > > > > > Any identification tips welcome, thanks.
> >> > > > > > > > > > There appears to be two of the same caps, would
> >> > replace both
> >> > > > > > > > > > of course.
> >> > > > > > > > > >
> >> > > > > > > > > > DC
> >> > > > > > > > > >
> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> > wrote:
> >> > > > > > > > > > >
> >> > > > > > > > > > > I am considering tackling the repair of a 1530 that
> >> > > > > > > > > > > does not respond to the power switch. The power
> >> > > > > > > > > > > supply
> >> > > > > > > > > > > module measures 16.35v so I think its fine
> >> > (unfortunately,
> >> > > > > > > > > > > that would have been an easy problem isolation!)
> >> > > > > > > > > > > So its something internal. I have the service manuals
> >> > > > > > > > > > > downloaded but I thought maybe I'd get some pointers
> >> > form
> >> > > > > > > > > > > folks who have already performed cold stone dead
> >> > diagnosis.
> >> > > > > > > > > > >
> >> > > > > > > > > > > If I don't dive into this FYI this very clean 1530
> >> > > > > > > > > > > will
> >> > > > > > > > > > > be available for parts/repair!
> >> > > > > > > > > > >
> >> > > > > > > > > > > Thanks in advance,
> >> > > > > > > > > > > DC
> >> > > > > > > > > > >
> >> > > > > > > > > >
> >> > > > > > > > >
> >> > > > > > > >
> >> > > > > > >
> >> > > > > >
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> >> Since we are on the topic of TCP does anyone have a formula stashed that
> >> can be easily had to run say serial (probably ppp) from something like a
> >> small system like the raspberry pi serially to a system with dos and a
> >> stack? It's been so long since I messed with dos environment networking
> >> I forget.
> >>
> >> I think windows of some sort had trumpet to handle part of the equation,
> >> but I don' t have any references right now over a dos stack.
> >>
> >> Probably something to do windows 3.1 or win95 / win98 would be better,
> >> but I don't know if the hardware here would be up to those os's.
> >>
> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
> >> asking for everything here. Objective is to have something that could
> >> suck off or load a disk image with a floppy boot. I suspect it was a
> >> difficult thing to get going in the day, though, and even wors now.
> >>
> >> jim
> >> >
> >> > ,___
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
Date: Mon, 15 Oct 2012 12:09:39 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
make it, but it would be breathing hard. As for parallel drives, see if you
can find any of the Backpack stuff. I have a CD-ROM drive that works off
the parallel port, but I haven't tried it on the GRiD yet.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "techtalklive@..." <doug@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Sunday, October 14, 2012 7:48 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
> Agreed! The Xircom Parallel port 10bT is available but has limited driver
> support.
> Other similar devices don't seem to be on the used market right not.
> I'm also considering a parallel based disk drive at this point.
> Yes, ISA itself would have a hard time saturating 10bT I think... I didn't
> actually run the numbers.
> DC
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> I don't think I'd even bother with the serial port. You might get
>> 230,400bps out of it if it has one of the fancier UARTs, but even a
>> 16550AFN
>> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
>> have
>> to slow it down with CTS/RTS handshaking. I think the standard parallel
>> port will give you around 5Mbps, won't it? Maybe a tad faster with
>> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
>> even
>> if you could directly tie in to the ISA bus, it would be tough.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "Androgenoide" <androgenoide@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Friday, October 12, 2012 3:37 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> > The only real obstacle to DOS networking with the Grid is finding an
>> > Ethernet adapter that will work through either the serial or parallel
>> > ports. I used the Xircom on the parallel port because I had one at
>> > the
>> > time. I've got a serial device server now that would probably work
>> > too
>> > but I've got too much going on at the moment to dig out a Grid just to
>> > see
>> > what would be required. Either of those solutions would be limited by
>> > the speed of the ports(and the Grid itself), of course. Gigabit speeds
>> > are out of the question!
>> > Another thought... The guy who put together the Techworm boot disk also
>> > had one called Networm, a single floppy that could do a dialup internet
>> > connection... (if you still have access to a dialup service... if not,
>> > Budget Dial Up has a prepaid service that allows you to buy just a few
>> > hours at a time).
>> >
>> > Generally speaking, if an old machine has either a serial or parallel
>> > port
>> > and you can get it to boot into DOS, there is always a way to transfer
>> > files to another machine. Even if it has no floppy you can use
>> > another
>> > DOS machine running Laplink. If it does have a floppy there are a lot
>> > of
>> > file transfer programs out there, from Kermit to the original version
>> > of
>> > Procomm that will fit on a single floppy.
>> >
>> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full
>> > install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky
>> > and
>> > would require some hardware tweaks even to make a slow machine... kind
>> > of
>> > an extreme project. I've heard of a Linux distro that will fit on a
>> > single floppy and run on systems with limited resources
>> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one
>> > seems to want 4MB of RAM.
>> >
>> > There are plenty of people on the web who have too much time on their
>> > hands and are still playing with machines even older than the Grid...
>> > You
>> > can still buy new after-market accessories for Commodores, for example,
>> > so
>> > don't assume that there are no new solutions to old problems.
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
>> >>
>> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> >
>> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port
>> >> > to
>> >> > a NIC... although I've been wondering lately if it might not have
>> >> > made
>> >> > equally good sense to use a device server on the serial port...?
>> >> > And,
>> >> > of course, the Arachne browser... not many choices for a DOS browser
>> >> > are there? I used it to check my Yahoo web mail and I'll have to say
>> >> > that it gave a whole new dimension of meaning to the word "slow." Go
>> >> > ahead, make a pot of tea while it's loading that page, it will be a
>> >> > while.
>> >> >
>> >> > Sometimes it's fun to do things the hard way. Ran into a web page
>> >> > last
>> >> > week of a guy who was competing with a friend to see who could force
>> >> > Windows XP to run with the least resources. It won't install unless
>> >> > it
>> >> > sees at least 64MB of RAM and a Pentium processor but, once
>> >> > installed
>> >> > you can remove RAM and underclock the machine... He said he got one
>> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
>> >> > half
>> >> > hour to boot.
>> >> >
>> >> > I scored an HP 95LX a while back and someday, when I have nothing
>> >> > else
>> >> > to do (Hah!) it might be interesting to see if I can get online with
>> >> > a
>> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
>> >> > OS/browser
>> >> > could be ported to a 95LX?)... or maybe not...
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> > <doug@> wrote:
>> >> > >
>> >> > > Like the hack job? :O
>> >> > >
>> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
>> >> > > Should I take the kbd apart and clean it (will that likely
>> >> > > fix it?) or look for a replacement?
>> >> > >
>> >> > > So what can I do with this thing if I put more mem in it?
>> >> > > Its all accessed funky through expaned mem methods, isn't it?
>> >> > > I have a coprocessor I could put in this but not sure of
>> >> > > the point there.
>> >> > >
>> >> > > I think I might like to accomplish getting it on the web.
>> >> > > I'd need the LAN hardware I guess.
>> >> > > Any other ideas?
>> >> > >
>> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
>> >> > > it that mate inside the cavity. But one of the two spring contacts
>> >> > > inside is "rubberized", so only the one contact hits metal to
>> >> > > metal.
>> >> > > So the P.S. only works using the cord to go from the P.S. into the
>> >> > > radial DC jack. Strange?
>> >> > >
>> >> > > DC
>> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
>> >> > wrote:
>> >> > > >
>> >> > > > Great job, Doug!
>> >> > > >
>> >> > > > Isn't it nice when you manage to salvage one of these beautiful
>> >> > machines? And yep, that's the way it works.
>> >> > > >
>> >> > > > Once you restore battery power to the 1287A, the CMOS registers
>> >> > are again active. It's just that they're filled with nonsense, so
>> >> > the
>> >> > computer tells you the clock had stopped (which it did), and simply
>> >> > prompts you to reset the time. Once you do that and reboot,
>> >> > everything's hunky-dory.
>> >> > > >
>> >> > > > You can probably find some more 256K sticks somewhere and
>> >> > > > upgrade
>> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great
>> >> > to
>> >> > hear the HDD is good too.
>> >> > > >
>> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
>> >> > > > that
>> >> > I looked at, however it was strange. It was definitely branded a
>> >> > 1520,
>> >> > and advertised that way, but the flip up screen said it was a 386
>> >> > machine. I decided to get it, and it was only about $90 with
>> >> > shipping.
>> >> > When I got the machine, I was very excited when it began to post,
>> >> > because I got a full 8MB of RAM! It of course displayed the
>> >> > configuration error 02 indicating the CMOS battery was dead. So I
>> >> > opened it up. Unfortunately, it was also a DS1287A model, but that
>> >> > was
>> >> > no big deal. I decided to replace the DS1287A as I had a spare.
>> >> > Imagine my surprise and joy when I took the keyboard off to discover
>> >> > that not only was this really a 386 machine (a 1530), but it also
>> >> > had
>> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
>> >> > this
>> >> > solved the configuration error just fine. But alas, I didn't get a
>> >> > triple crown winner here. The Conner drive was definitely dead. But
>> >> > heck, getting another HDD is easy compared to the other benefits!
>> >> > The
>> >> > original owner of this machine definitely took care of it.
>> >> > > >
>> >> > > > Phil
>> >> > > >
>> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> > wrote:
>> >> > > > >
>> >> > > > > It runs! Hard Disk is GOOD.
>> >> > > > > I did a DS1287 hack to the machine today and ran the wires to
>> >> > > > > a
>> >> > convenient place for the battery. Upon power up it said
>> >> > > > > that the RTC was stopped, and it needed setting.
>> >> > > > > The "stopped" message threw me, I thought something was wrong
>> >> > > > > with
>> >> > > > > the chip. It took an F1 to continue and went right through
>> >> > > > > POST
>> >> > and Autoexec.
>> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
>> >> > > > > Now it boots cleanly.
>> >> > > > > Has Lotus123 on the HD.
>> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
>> >> > > > > The only remaining issue is that a few keys on the keyboard
>> >> > > > > don't work. 123Q and spacebar. From an external kbd everything
>> >> > > > > works.
>> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM,
>> >> > > > > a
>> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>> >> > > > >
>> >> > > > >
>> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> > wrote:
>> >> > > > > >
>> >> > > > > > Thanks so much that was great info. I had no idea on the X2
>> >> > > > > > being a rating. May have to try it without them just to
>> >> > > > > > make sure the rest of it is still good.
>> >> > > > > >
>> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
>> >> > <andrebakken@> wrote:
>> >> > > > > > >
>> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
>> >> > > > > > > difference.
>> >> > The X2 also signifies they're an enhanced type meant to go directly
>> >> > across the mains. Be sure to get X2 rated replacements.
>> >> > > > > > > The PSU will work without those cap's in place, but will
>> >> > radiate more interference/noise out onto the mains.
>> >> > > > > > >
>> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> > wrote:
>> >> > > > > > > >
>> >> > > > > > > > There are two in there that are the same.
>> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> > > > > > > > Polyprop I think. Radial type in a square package.
>> >> > > > > > > > The bottom is clear so you can see the radial shape.
>> >> > > > > > > > I have them out already.
>> >> > > > > > > > Thanks for the tip on the 1287A
>> >> > > > > > > >
>> >> > > > > > > > DC
>> >> > > > > > > >
>> >> > > > > > > >
>> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
>> >> > wrote:
>> >> > > > > > > > >
>> >> > > > > > > > > Good Find, DC
>> >> > > > > > > > >
>> >> > > > > > > > > I guess they got burnt to the point where you can't
>> >> > identify the capcity amount. Could you give me the output voltage
>> >> > and
>> >> > amperage? I'll look through my units and see if I can identify them
>> >> > for you.
>> >> > > > > > > > >
>> >> > > > > > > > > Phil
>> >> > > > > > > > >
>> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> > wrote:
>> >> > > > > > > > > >
>> >> > > > > > > > > > I posted pictures of what looks like a failed cap in
>> >> > the ext p.s. unit. A stinky melt down!
>> >> > > > > > > > > > I'm supposing I can replace these.
>> >> > > > > > > > > > Any identification tips welcome, thanks.
>> >> > > > > > > > > > There appears to be two of the same caps, would
>> >> > replace both
>> >> > > > > > > > > > of course.
>> >> > > > > > > > > >
>> >> > > > > > > > > > DC
>> >> > > > > > > > > >
>> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> > wrote:
>> >> > > > > > > > > > >
>> >> > > > > > > > > > > I am considering tackling the repair of a 1530
>> >> > > > > > > > > > > that
>> >> > > > > > > > > > > does not respond to the power switch. The power
>> >> > > > > > > > > > > supply
>> >> > > > > > > > > > > module measures 16.35v so I think its fine
>> >> > (unfortunately,
>> >> > > > > > > > > > > that would have been an easy problem isolation!)
>> >> > > > > > > > > > > So its something internal. I have the service
>> >> > > > > > > > > > > manuals
>> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
>> >> > > > > > > > > > > pointers
>> >> > form
>> >> > > > > > > > > > > folks who have already performed cold stone dead
>> >> > diagnosis.
>> >> > > > > > > > > > >
>> >> > > > > > > > > > > If I don't dive into this FYI this very clean 1530
>> >> > > > > > > > > > > will
>> >> > > > > > > > > > > be available for parts/repair!
>> >> > > > > > > > > > >
>> >> > > > > > > > > > > Thanks in advance,
>> >> > > > > > > > > > > DC
>> >> > > > > > > > > > >
>> >> > > > > > > > > >
>> >> > > > > > > > >
>> >> > > > > > > >
>> >> > > > > > >
>> >> > > > > >
>> >> > > > >
>> >> > > >
>> >> > >
>> >> >
>> >>
>> >> Since we are on the topic of TCP does anyone have a formula stashed
>> >> that
>> >> can be easily had to run say serial (probably ppp) from something like
>> >> a
>> >> small system like the raspberry pi serially to a system with dos and a
>> >> stack? It's been so long since I messed with dos environment
>> >> networking
>> >> I forget.
>> >>
>> >> I think windows of some sort had trumpet to handle part of the
>> >> equation,
>> >> but I don' t have any references right now over a dos stack.
>> >>
>> >> Probably something to do windows 3.1 or win95 / win98 would be better,
>> >> but I don't know if the hardware here would be up to those os's.
>> >>
>> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
>> >> asking for everything here. Objective is to have something that could
>> >> suck off or load a disk image with a floppy boot. I suspect it was a
>> >> difficult thing to get going in the day, though, and even wors now.
>> >>
>> >> jim
>> >> >
>> >> > ,___
>> >> >
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Tue, 16 Oct 2012 02:47:39 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Its a 1530... clock is... I dont know 20Mhz?
Yes checking out Backpacks now. Just collected drivers from
around the web for them and am checking on ebay for
equipment. I suspect they will work.
I thought I might take a look to see if there was parallel port
software that would work like "laplink" to tether to another PC
but would make a directory/drive on the the host PC appear as a drive to the 1530.
That would be cool... and avoid purchasing old hardware.
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> make it, but it would be breathing hard. As for parallel drives, see if you
> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> the parallel port, but I haven't tried it on the GRiD yet.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: "techtalklive@..." <doug@...>
> To: <RuGRiD-Laptop@yahoogroups.com>
> Sent: Sunday, October 14, 2012 7:48 PM
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> >
> > Agreed! The Xircom Parallel port 10bT is available but has limited driver
> > support.
> > Other similar devices don't seem to be on the used market right not.
> > I'm also considering a parallel based disk drive at this point.
> > Yes, ISA itself would have a hard time saturating 10bT I think... I didn't
> > actually run the numbers.
> > DC
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >>
> >> I don't think I'd even bother with the serial port. You might get
> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> >> 16550AFN
> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> >> have
> >> to slow it down with CTS/RTS handshaking. I think the standard parallel
> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> >> even
> >> if you could directly tie in to the ISA bus, it would be tough.
> >>
> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> "She said it was either her or the ham radio. Over."
> >>
> >>
> >> ----- Original Message -----
> >> From: "Androgenoide" <androgenoide@>
> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> Sent: Friday, October 12, 2012 3:37 PM
> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >>
> >>
> >> > The only real obstacle to DOS networking with the Grid is finding an
> >> > Ethernet adapter that will work through either the serial or parallel
> >> > ports. I used the Xircom on the parallel port because I had one at
> >> > the
> >> > time. I've got a serial device server now that would probably work
> >> > too
> >> > but I've got too much going on at the moment to dig out a Grid just to
> >> > see
> >> > what would be required. Either of those solutions would be limited by
> >> > the speed of the ports(and the Grid itself), of course. Gigabit speeds
> >> > are out of the question!
> >> > Another thought... The guy who put together the Techworm boot disk also
> >> > had one called Networm, a single floppy that could do a dialup internet
> >> > connection... (if you still have access to a dialup service... if not,
> >> > Budget Dial Up has a prepaid service that allows you to buy just a few
> >> > hours at a time).
> >> >
> >> > Generally speaking, if an old machine has either a serial or parallel
> >> > port
> >> > and you can get it to boot into DOS, there is always a way to transfer
> >> > files to another machine. Even if it has no floppy you can use
> >> > another
> >> > DOS machine running Laplink. If it does have a floppy there are a lot
> >> > of
> >> > file transfer programs out there, from Kermit to the original version
> >> > of
> >> > Procomm that will fit on a single floppy.
> >> >
> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full
> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky
> >> > and
> >> > would require some hardware tweaks even to make a slow machine... kind
> >> > of
> >> > an extreme project. I've heard of a Linux distro that will fit on a
> >> > single floppy and run on systems with limited resources
> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one
> >> > seems to want 4MB of RAM.
> >> >
> >> > There are plenty of people on the web who have too much time on their
> >> > hands and are still playing with machines even older than the Grid...
> >> > You
> >> > can still buy new after-market accessories for Commodores, for example,
> >> > so
> >> > don't assume that there are no new solutions to old problems.
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> >> >>
> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >> >> >
> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port
> >> >> > to
> >> >> > a NIC... although I've been wondering lately if it might not have
> >> >> > made
> >> >> > equally good sense to use a device server on the serial port...?
> >> >> > And,
> >> >> > of course, the Arachne browser... not many choices for a DOS browser
> >> >> > are there? I used it to check my Yahoo web mail and I'll have to say
> >> >> > that it gave a whole new dimension of meaning to the word "slow." Go
> >> >> > ahead, make a pot of tea while it's loading that page, it will be a
> >> >> > while.
> >> >> >
> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> >> >> > last
> >> >> > week of a guy who was competing with a friend to see who could force
> >> >> > Windows XP to run with the least resources. It won't install unless
> >> >> > it
> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> >> >> > installed
> >> >> > you can remove RAM and underclock the machine... He said he got one
> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> >> >> > half
> >> >> > hour to boot.
> >> >> >
> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> >> >> > else
> >> >> > to do (Hah!) it might be interesting to see if I can get online with
> >> >> > a
> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> >> >> > OS/browser
> >> >> > could be ported to a 95LX?)... or maybe not...
> >> >> >
> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> >> >> > <doug@> wrote:
> >> >> > >
> >> >> > > Like the hack job? :O
> >> >> > >
> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> >> >> > > Should I take the kbd apart and clean it (will that likely
> >> >> > > fix it?) or look for a replacement?
> >> >> > >
> >> >> > > So what can I do with this thing if I put more mem in it?
> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> >> >> > > I have a coprocessor I could put in this but not sure of
> >> >> > > the point there.
> >> >> > >
> >> >> > > I think I might like to accomplish getting it on the web.
> >> >> > > I'd need the LAN hardware I guess.
> >> >> > > Any other ideas?
> >> >> > >
> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> >> >> > > it that mate inside the cavity. But one of the two spring contacts
> >> >> > > inside is "rubberized", so only the one contact hits metal to
> >> >> > > metal.
> >> >> > > So the P.S. only works using the cord to go from the P.S. into the
> >> >> > > radial DC jack. Strange?
> >> >> > >
> >> >> > > DC
> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
> >> >> > wrote:
> >> >> > > >
> >> >> > > > Great job, Doug!
> >> >> > > >
> >> >> > > > Isn't it nice when you manage to salvage one of these beautiful
> >> >> > machines? And yep, that's the way it works.
> >> >> > > >
> >> >> > > > Once you restore battery power to the 1287A, the CMOS registers
> >> >> > are again active. It's just that they're filled with nonsense, so
> >> >> > the
> >> >> > computer tells you the clock had stopped (which it did), and simply
> >> >> > prompts you to reset the time. Once you do that and reboot,
> >> >> > everything's hunky-dory.
> >> >> > > >
> >> >> > > > You can probably find some more 256K sticks somewhere and
> >> >> > > > upgrade
> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great
> >> >> > to
> >> >> > hear the HDD is good too.
> >> >> > > >
> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> >> >> > > > that
> >> >> > I looked at, however it was strange. It was definitely branded a
> >> >> > 1520,
> >> >> > and advertised that way, but the flip up screen said it was a 386
> >> >> > machine. I decided to get it, and it was only about $90 with
> >> >> > shipping.
> >> >> > When I got the machine, I was very excited when it began to post,
> >> >> > because I got a full 8MB of RAM! It of course displayed the
> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but that
> >> >> > was
> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> >> >> > Imagine my surprise and joy when I took the keyboard off to discover
> >> >> > that not only was this really a 386 machine (a 1530), but it also
> >> >> > had
> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> >> >> > this
> >> >> > solved the configuration error just fine. But alas, I didn't get a
> >> >> > triple crown winner here. The Conner drive was definitely dead. But
> >> >> > heck, getting another HDD is easy compared to the other benefits!
> >> >> > The
> >> >> > original owner of this machine definitely took care of it.
> >> >> > > >
> >> >> > > > Phil
> >> >> > > >
> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> > wrote:
> >> >> > > > >
> >> >> > > > > It runs! Hard Disk is GOOD.
> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires to
> >> >> > > > > a
> >> >> > convenient place for the battery. Upon power up it said
> >> >> > > > > that the RTC was stopped, and it needed setting.
> >> >> > > > > The "stopped" message threw me, I thought something was wrong
> >> >> > > > > with
> >> >> > > > > the chip. It took an F1 to continue and went right through
> >> >> > > > > POST
> >> >> > and Autoexec.
> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> >> >> > > > > Now it boots cleanly.
> >> >> > > > > Has Lotus123 on the HD.
> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> >> >> > > > > don't work. 123Q and spacebar. From an external kbd everything
> >> >> > > > > works.
> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM,
> >> >> > > > > a
> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> >> >> > > > >
> >> >> > > > >
> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> > wrote:
> >> >> > > > > >
> >> >> > > > > > Thanks so much that was great info. I had no idea on the X2
> >> >> > > > > > being a rating. May have to try it without them just to
> >> >> > > > > > make sure the rest of it is still good.
> >> >> > > > > >
> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> >> >> > <andrebakken@> wrote:
> >> >> > > > > > >
> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> >> >> > > > > > > difference.
> >> >> > The X2 also signifies they're an enhanced type meant to go directly
> >> >> > across the mains. Be sure to get X2 rated replacements.
> >> >> > > > > > > The PSU will work without those cap's in place, but will
> >> >> > radiate more interference/noise out onto the mains.
> >> >> > > > > > >
> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> > wrote:
> >> >> > > > > > > >
> >> >> > > > > > > > There are two in there that are the same.
> >> >> > > > > > > > .15uF 250V I think I can replace them.
> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> >> >> > > > > > > > I have them out already.
> >> >> > > > > > > > Thanks for the tip on the 1287A
> >> >> > > > > > > >
> >> >> > > > > > > > DC
> >> >> > > > > > > >
> >> >> > > > > > > >
> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
> >> >> > wrote:
> >> >> > > > > > > > >
> >> >> > > > > > > > > Good Find, DC
> >> >> > > > > > > > >
> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> >> >> > identify the capcity amount. Could you give me the output voltage
> >> >> > and
> >> >> > amperage? I'll look through my units and see if I can identify them
> >> >> > for you.
> >> >> > > > > > > > >
> >> >> > > > > > > > > Phil
> >> >> > > > > > > > >
> >> >> > > > > > > > > --- In RuGRiD-Laptop@...m
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> > wrote:
> >> >> > > > > > > > > >
> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap in
> >> >> > the ext p.s. unit. A stinky melt down!
> >> >> > > > > > > > > > I'm supposing I can replace these.
> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> >> >> > > > > > > > > > There appears to be two of the same caps, would
> >> >> > replace both
> >> >> > > > > > > > > > of course.
> >> >> > > > > > > > > >
> >> >> > > > > > > > > > DC
> >> >> > > > > > > > > >
> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> > wrote:
> >> >> > > > > > > > > > >
> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> >> >> > > > > > > > > > > that
> >> >> > > > > > > > > > > does not respond to the power switch. The power
> >> >> > > > > > > > > > > supply
> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> >> >> > (unfortunately,
> >> >> > > > > > > > > > > that would have been an easy problem isolation!)
> >> >> > > > > > > > > > > So its something internal. I have the service
> >> >> > > > > > > > > > > manuals
> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> >> >> > > > > > > > > > > pointers
> >> >> > form
> >> >> > > > > > > > > > > folks who have already performed cold stone dead
> >> >> > diagnosis.
> >> >> > > > > > > > > > >
> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean 1530
> >> >> > > > > > > > > > > will
> >> >> > > > > > > > > > > be available for parts/repair!
> >> >> > > > > > > > > > >
> >> >> > > > > > > > > > > Thanks in advance,
> >> >> > > > > > > > > > > DC
> >> >> > > > > > > > > > >
> >> >> > > > > > > > > >
> >> >> > > > > > > > >
> >> >> > > > > > > >
> >> >> > > > > > >
> >> >> > > > > >
> >> >> > > > >
> >> >> > > >
> >> >> > >
> >> >> >
> >> >>
> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> >> >> that
> >> >> can be easily had to run say serial (probably ppp) from something like
> >> >> a
> >> >> small system like the raspberry pi serially to a system with dos and a
> >> >> stack? It's been so long since I messed with dos environment
> >> >> networking
> >> >> I forget.
> >> >>
> >> >> I think windows of some sort had trumpet to handle part of the
> >> >> equation,
> >> >> but I don' t have any references right now over a dos stack.
> >> >>
> >> >> Probably something to do windows 3.1 or win95 / win98 would be better,
> >> >> but I don't know if the hardware here would be up to those os's.
> >> >>
> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
> >> >> asking for everything here. Objective is to have something that could
> >> >> suck off or load a disk image with a floppy boot. I suspect it was a
> >> >> difficult thing to get going in the day, though, and even wors now.
> >> >>
> >> >> jim
> >> >> >
> >> >> > ,___
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
Date: Tue, 16 Oct 2012 09:28:57 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Good luck with the Backpack stuff.
There's a book called "Hot Links", which was produced by the same people
that produced LapLink. In the back of the book is a disk with programs that
will let you transfer files, either via null modem cable or LapLink cable.
I doubt that the book is still in print, but it might be something to look
for. If you get the book without the disk, let me know, and I'll get you
the software. I can't remember if it lets you map the host drive to the
client machine, but that would be cool, if it does that.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "techtalklive@..." <doug@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Monday, October 15, 2012 10:47 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> Its a 1530... clock is... I dont know 20Mhz?
> Yes checking out Backpacks now. Just collected drivers from
> around the web for them and am checking on ebay for
> equipment. I suspect they will work.
>
> I thought I might take a look to see if there was parallel port
> software that would work like "laplink" to tether to another PC
> but would make a directory/drive on the the host PC appear as a drive to
> the 1530.
>
> That would be cool... and avoid purchasing old hardware.
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
>> make it, but it would be breathing hard. As for parallel drives, see if
>> you
>> can find any of the Backpack stuff. I have a CD-ROM drive that works off
>> the parallel port, but I haven't tried it on the GRiD yet.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "techtalklive@..." <doug@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Sunday, October 14, 2012 7:48 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> >
>> > Agreed! The Xircom Parallel port 10bT is available but has limited
>> > driver
>> > support.
>> > Other similar devices don't seem to be on the used market right not.
>> > I'm also considering a parallel based disk drive at this point.
>> > Yes, ISA itself would have a hard time saturating 10bT I think... I
>> > didn't
>> > actually run the numbers.
>> > DC
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
>> >>
>> >> I don't think I'd even bother with the serial port. You might get
>> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
>> >> 16550AFN
>> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
>> >> have
>> >> to slow it down with CTS/RTS handshaking. I think the standard
>> >> parallel
>> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
>> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
>> >> even
>> >> if you could directly tie in to the ISA bus, it would be tough.
>> >>
>> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> "She said it was either her or the ham radio. Over."
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "Androgenoide" <androgenoide@>
>> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> Sent: Friday, October 12, 2012 3:37 PM
>> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >> > The only real obstacle to DOS networking with the Grid is finding an
>> >> > Ethernet adapter that will work through either the serial or
>> >> > parallel
>> >> > ports. I used the Xircom on the parallel port because I had one at
>> >> > the
>> >> > time. I've got a serial device server now that would probably work
>> >> > too
>> >> > but I've got too much going on at the moment to dig out a Grid just
>> >> > to
>> >> > see
>> >> > what would be required. Either of those solutions would be limited
>> >> > by
>> >> > the speed of the ports(and the Grid itself), of course. Gigabit
>> >> > speeds
>> >> > are out of the question!
>> >> > Another thought... The guy who put together the Techworm boot disk
>> >> > also
>> >> > had one called Networm, a single floppy that could do a dialup
>> >> > internet
>> >> > connection... (if you still have access to a dialup service... if
>> >> > not,
>> >> > Budget Dial Up has a prepaid service that allows you to buy just a
>> >> > few
>> >> > hours at a time).
>> >> >
>> >> > Generally speaking, if an old machine has either a serial or
>> >> > parallel
>> >> > port
>> >> > and you can get it to boot into DOS, there is always a way to
>> >> > transfer
>> >> > files to another machine. Even if it has no floppy you can use
>> >> > another
>> >> > DOS machine running Laplink. If it does have a floppy there are a
>> >> > lot
>> >> > of
>> >> > file transfer programs out there, from Kermit to the original
>> >> > version
>> >> > of
>> >> > Procomm that will fit on a single floppy.
>> >> >
>> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
>> >> > full
>> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
>> >> > tricky
>> >> > and
>> >> > would require some hardware tweaks even to make a slow machine...
>> >> > kind
>> >> > of
>> >> > an extreme project. I've heard of a Linux distro that will fit on
>> >> > a
>> >> > single floppy and run on systems with limited resources
>> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
>> >> > one
>> >> > seems to want 4MB of RAM.
>> >> >
>> >> > There are plenty of people on the web who have too much time on
>> >> > their
>> >> > hands and are still playing with machines even older than the
>> >> > Grid...
>> >> > You
>> >> > can still buy new after-market accessories for Commodores, for
>> >> > example,
>> >> > so
>> >> > don't assume that there are no new solutions to old problems.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
>> >> >>
>> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> >> >
>> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
>> >> >> > port
>> >> >> > to
>> >> >> > a NIC... although I've been wondering lately if it might not have
>> >> >> > made
>> >> >> > equally good sense to use a device server on the serial port...?
>> >> >> > And,
>> >> >> > of course, the Arachne browser... not many choices for a DOS
>> >> >> > browser
>> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
>> >> >> > say
>> >> >> > that it gave a whole new dimension of meaning to the word "slow."
>> >> >> > Go
>> >> >> > ahead, make a pot of tea while it's loading that page, it will be
>> >> >> > a
>> >> >> > while.
>> >> >> >
>> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
>> >> >> > last
>> >> >> > week of a guy who was competing with a friend to see who could
>> >> >> > force
>> >> >> > Windows XP to run with the least resources. It won't install
>> >> >> > unless
>> >> >> > it
>> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
>> >> >> > installed
>> >> >> > you can remove RAM and underclock the machine... He said he got
>> >> >> > one
>> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
>> >> >> > half
>> >> >> > hour to boot.
>> >> >> >
>> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
>> >> >> > else
>> >> >> > to do (Hah!) it might be interesting to see if I can get online
>> >> >> > with
>> >> >> > a
>> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
>> >> >> > OS/browser
>> >> >> > could be ported to a 95LX?)... or maybe not...
>> >> >> >
>> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> > <doug@> wrote:
>> >> >> > >
>> >> >> > > Like the hack job? :O
>> >> >> > >
>> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
>> >> >> > > screes?
>> >> >> > > Should I take the kbd apart and clean it (will that likely
>> >> >> > > fix it?) or look for a replacement?
>> >> >> > >
>> >> >> > > So what can I do with this thing if I put more mem in it?
>> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
>> >> >> > > I have a coprocessor I could put in this but not sure of
>> >> >> > > the point there.
>> >> >> > >
>> >> >> > > I think I might like to accomplish getting it on the web.
>> >> >> > > I'd need the LAN hardware I guess.
>> >> >> > > Any other ideas?
>> >> >> > >
>> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
>> >> >> > > it that mate inside the cavity. But one of the two spring
>> >> >> > > contacts
>> >> >> > > inside is "rubberized", so only the one contact hits metal to
>> >> >> > > metal.
>> >> >> > > So the P.S. only works using the cord to go from the P.S. into
>> >> >> > > the
>> >> >> > > radial DC jack. Strange?
>> >> >> > >
>> >> >> > > DC
>> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> >> > <Jeriddian@>
>> >> >> > wrote:
>> >> >> > > >
>> >> >> > > > Great job, Doug!
>> >> >> > > >
>> >> >> > > > Isn't it nice when you manage to salvage one of these
>> >> >> > > > beautiful
>> >> >> > machines? And yep, that's the way it works.
>> >> >> > > >
>> >> >> > > > Once you restore battery power to the 1287A, the CMOS
>> >> >> > > > registers
>> >> >> > are again active. It's just that they're filled with nonsense, so
>> >> >> > the
>> >> >> > computer tells you the clock had stopped (which it did), and
>> >> >> > simply
>> >> >> > prompts you to reset the time. Once you do that and reboot,
>> >> >> > everything's hunky-dory.
>> >> >> > > >
>> >> >> > > > You can probably find some more 256K sticks somewhere and
>> >> >> > > > upgrade
>> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
>> >> >> > Great
>> >> >> > to
>> >> >> > hear the HDD is good too.
>> >> >> > > >
>> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
>> >> >> > > > that
>> >> >> > I looked at, however it was strange. It was definitely branded a
>> >> >> > 1520,
>> >> >> > and advertised that way, but the flip up screen said it was a 386
>> >> >> > machine. I decided to get it, and it was only about $90 with
>> >> >> > shipping.
>> >> >> > When I got the machine, I was very excited when it began to post,
>> >> >> > because I got a full 8MB of RAM! It of course displayed the
>> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
>> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
>> >> >> > that
>> >> >> > was
>> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
>> >> >> > Imagine my surprise and joy when I took the keyboard off to
>> >> >> > discover
>> >> >> > that not only was this really a 386 machine (a 1530), but it also
>> >> >> > had
>> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
>> >> >> > this
>> >> >> > solved the configuration error just fine. But alas, I didn't get
>> >> >> > a
>> >> >> > triple crown winner here. The Conner drive was definitely dead.
>> >> >> > But
>> >> >> > heck, getting another HDD is easy compared to the other benefits!
>> >> >> > The
>> >> >> > original owner of this machine definitely took care of it.
>> >> >> > > >
>> >> >> > > > Phil
>> >> >> > > >
>> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > >
>> >> >> > > > > It runs! Hard Disk is GOOD.
>> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
>> >> >> > > > > to
>> >> >> > > > > a
>> >> >> > convenient place for the battery. Upon power up it said
>> >> >> > > > > that the RTC was stopped, and it needed setting.
>> >> >> > > > > The "stopped" message threw me, I thought something was
>> >> >> > > > > wrong
>> >> >> > > > > with
>> >> >> > > > > the chip. It took an F1 to continue and went right through
>> >> >> > > > > POST
>> >> >> > and Autoexec.
>> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
>> >> >> > > > > Now it boots cleanly.
>> >> >> > > > > Has Lotus123 on the HD.
>> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
>> >> >> > > > > The only remaining issue is that a few keys on the keyboard
>> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
>> >> >> > > > > everything
>> >> >> > > > > works.
>> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
>> >> >> > > > > RAM,
>> >> >> > > > > a
>> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > >
>> >> >> > > > > > Thanks so much that was great info. I had no idea on the
>> >> >> > > > > > X2
>> >> >> > > > > > being a rating. May have to try it without them just to
>> >> >> > > > > > make sure the rest of it is still good.
>> >> >> > > > > >
>> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
>> >> >> > <andrebakken@> wrote:
>> >> >> > > > > > >
>> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
>> >> >> > > > > > > difference.
>> >> >> > The X2 also signifies they're an enhanced type meant to go
>> >> >> > directly
>> >> >> > across the mains. Be sure to get X2 rated replacements.
>> >> >> > > > > > > The PSU will work without those cap's in place, but
>> >> >> > > > > > > will
>> >> >> > radiate more interference/noise out onto the mains.
>> >> >> > > > > > >
>> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > > > >
>> >> >> > > > > > > > There are two in there that are the same.
>> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
>> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
>> >> >> > > > > > > > I have them out already.
>> >> >> > > > > > > > Thanks for the tip on the 1287A
>> >> >> > > > > > > >
>> >> >> > > > > > > > DC
>> >> >> > > > > > > >
>> >> >> > > > > > > >
>> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> >> > <Jeriddian@>
>> >> >> > wrote:
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > Good Find, DC
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > I guess they got burnt to the point where you can't
>> >> >> > identify the capcity amount. Could you give me the output voltage
>> >> >> > and
>> >> >> > amperage? I'll look through my units and see if I can identify
>> >> >> > them
>> >> >> > for you.
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > Phil
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
>> >> >> > > > > > > > > > in
>> >> >> > the ext p.s. unit. A stinky melt down!
>> >> >> > > > > > > > > > I'm supposing I can replace these.
>> >> >> > > > > > > > > > Any identification tips welcome, thanks.
>> >> >> > > > > > > > > > There appears to be two of the same caps, would
>> >> >> > replace both
>> >> >> > > > > > > > > > of course.
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > > > DC
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
>> >> >> > > > > > > > > > > that
>> >> >> > > > > > > > > > > does not respond to the power switch. The power
>> >> >> > > > > > > > > > > supply
>> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
>> >> >> > (unfortunately,
>> >> >> > > > > > > > > > > that would have been an easy problem
>> >> >> > > > > > > > > > > isolation!)
>> >> >> > > > > > > > > > > So its something internal. I have the service
>> >> >> > > > > > > > > > > manuals
>> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
>> >> >> > > > > > > > > > > pointers
>> >> >> > form
>> >> >> > > > > > > > > > > folks who have already performed cold stone
>> >> >> > > > > > > > > > > dead
>> >> >> > diagnosis.
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
>> >> >> > > > > > > > > > > 1530
>> >> >> > > > > > > > > > > will
>> >> >> > > > > > > > > > > be available for parts/repair!
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > > > Thanks in advance,
>> >> >> > > > > > > > > > > DC
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > >
>> >> >> > > > > > > >
>> >> >> > > > > > >
>> >> >> > > > > >
>> >> >> > > > >
>> >> >> > > >
>> >> >> > >
>> >> >> >
>> >> >>
>> >> >> Since we are on the topic of TCP does anyone have a formula stashed
>> >> >> that
>> >> >> can be easily had to run say serial (probably ppp) from something
>> >> >> like
>> >> >> a
>> >> >> small system like the raspberry pi serially to a system with dos
>> >> >> and a
>> >> >> stack? It's been so long since I messed with dos environment
>> >> >> networking
>> >> >> I forget.
>> >> >>
>> >> >> I think windows of some sort had trumpet to handle part of the
>> >> >> equation,
>> >> >> but I don' t have any references right now over a dos stack.
>> >> >>
>> >> >> Probably something to do windows 3.1 or win95 / win98 would be
>> >> >> better,
>> >> >> but I don't know if the hardware here would be up to those os's.
>> >> >>
>> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
>> >> >> I'm
>> >> >> asking for everything here. Objective is to have something that
>> >> >> could
>> >> >> suck off or load a disk image with a floppy boot. I suspect it was
>> >> >> a
>> >> >> difficult thing to get going in the day, though, and even wors now.
>> >> >>
>> >> >> jim
>> >> >> >
>> >> >> > ,___
>> >> >> >
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------
>> >> >
>> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >
>> >> >
>> >> >
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Tue, 16 Oct 2012 10:20:42 -0700 (PDT)
From: Lawrence Walker
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=utf-8
I bought a GRID SCSI adaptor (the slide-in type like the VGA and power adaptors) many years ago in my enthusiactic Grid period. I must admit that I never tried it out and it is buried in my Grid boxes. There was also a program with it which inserted an interrupt entry in the BIOS to transfer control to the SCSI BIOS on the adaptor hardware like one finds with video gear The vendor also had another adaptor which allowed connection to IEE? devices like on the Commodore output. If there is any interest I could dig out the program and send an image of it.
>________________________________
> From: "techtalklive@..." <doug@...>
>To: RuGRiD-Laptop@yahoogroups.com
>Sent: Monday, October 15, 2012 9:47:39 PM
>Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
>
>Its a 1530... clock is... I dont know 20Mhz?
>Yes checking out Backpacks now. Just collected drivers from
>around the web for them and am checking on ebay for
>equipment. I suspect they will work.
>
>I thought I might take a look to see if there was parallel port
>software that would work like "laplink" to tether to another PC
>but would make a directory/drive on the the host PC appear as a drive to the 1530.
>
>That would be cool... and avoid purchasing old hardware.
>
>--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
>> make it, but it would be breathing hard. As for parallel drives, see if you
>> can find any of the Backpack stuff. I have a CD-ROM drive that works off
>> the parallel port, but I haven't tried it on the GRiD yet.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "techtalklive@..." <doug@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Sunday, October 14, 2012 7:48 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> >
>> > Agreed! The Xircom Parallel port 10bT is available but has limited driver
>> > support.
>> > Other similar devices don't seem to be on the used market right not.
>> > I'm also considering a parallel based disk drive at this point.
>> > Yes, ISA itself would have a hard time saturating 10bT I think... I didn't
>> > actually run the numbers.
>> > DC
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
>> >>
>> >> I don't think I'd even bother with the serial port. You might get
>> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
>> >> 16550AFN
>> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
>> >> have
>> >> to slow it down with CTS/RTS handshaking. I think the standard parallel
>> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
>> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
>> >> even
>> >> if you could directly tie in to the ISA bus, it would be tough.
>> >>
>> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> "She said it was either her or the ham radio. Over."
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "Androgenoide" <androgenoide@>
>> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> Sent: Friday, October 12, 2012 3:37 PM
>> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >> > The only real obstacle to DOS networking with the Grid is finding an
>> >> > Ethernet adapter that will work through either the serial or parallel
>> >> > ports. I used the Xircom on the parallel port because I had one at
>> >> > the
>> >> > time. I've got a serial device server now that would probably work
>> >> > too
>> >> > but I've got too much going on at the moment to dig out a Grid just to
>> >> > see
>> >> > what would be required. Either of those solutions would be limited by
>> >> > the speed of the ports(and the Grid itself), of course. Gigabit speeds
>> >> > are out of the question!
>> >> > Another thought... The guy who put together the Techworm boot disk also
>> >> > had one called Networm, a single floppy that could do a dialup internet
>> >> > connection... (if you still have access to a dialup service... if not,
>> >> > Budget Dial Up has a prepaid service that allows you to buy just a few
>> >> > hours at a time).
>> >> >
>> >> > Generally speaking, if an old machine has either a serial or parallel
>> >> > port
>> >> > and you can get it to boot into DOS, there is always a way to transfer
>> >> > files to another machine. Even if it has no floppy you can use
>> >> > another
>> >> > DOS machine running Laplink. If it does have a floppy there are a lot
>> >> > of
>> >> > file transfer programs out there, from Kermit to the original version
>> >> > of
>> >> > Procomm that will fit on a single floppy.
>> >> >
>> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full
>> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky
>> >> > and
>> >> > would require some hardware tweaks even to make a slow machine... kind
>> >> > of
>> >> > an extreme project. I've heard of a Linux distro that will fit on a
>> >> > single floppy and run on systems with limited resources
>> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one
>> >> > seems to want 4MB of RAM.
>> >> >
>> >> > There are plenty of people on the web who have too much time on their
>> >> > hands and are still playing with machines even older than the Grid...
>> >> > You
>> >> > can still buy new after-market accessories for Commodores, for example,
>> >> > so
>> >> > don't assume that there are no new solutions to old problems.
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
>> >> >>
>> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> >> >
>> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port
>> >> >> > to
>> >> >> > a NIC... although I've been wondering lately if it might not have
>> >> >> > made
>> >> >> > equally good sense to use a device server on the serial port...?
>> >> >> > And,
>> >> >> > of course, the Arachne browser... not many choices for a DOS browser
>> >> >> > are there? I used it to check my Yahoo web mail and I'll have to say
>> >> >> > that it gave a whole new dimension of meaning to the word "slow." Go
>> >> >> > ahead, make a pot of tea while it's loading that page, it will be a
>> >> >> > while.
>> >> >> >
>> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
>> >> >> > last
>> >> >> > week of a guy who was competing with a friend to see who could force
>> >> >> > Windows XP to run with the least resources. It won't install unless
>> >> >> > it
>> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
>> >> >> > installed
>> >> >> > you can remove RAM and underclock the machine... He said he got one
>> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
>> >> >> > half
>> >> >> > hour to boot.
>> >> >> >
>> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
>> >> >> > else
>> >> >> > to do (Hah!) it might be interesting to see if I can get online with
>> >> >> > a
>> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
>> >> >> > OS/browser
>> >> >> > could be ported to a 95LX?)... or maybe not...
>> >> >> >
>> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> > <doug@> wrote:
>> >> >> > >
>> >> >> > > Like the hack job? :O
>> >> >> > >
>> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
>> >> >> > > Should I take the kbd apart and clean it (will that likely
>> >> >> > > fix it?) or look for a replacement?
>> >> >> > >
>> >> >> > > So what can I do with this thing if I put more mem in it?
>> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
>> >> >> > > I have a coprocessor I could put in this but not sure of
>> >> >> > > the point there.
>> >> >> > >
>> >> >> > > I think I might like to accomplish getting it on the web.
>> >> >> > > I'd need the LAN hardware I guess.
>> >> >> > > Any other ideas?
>> >> >> > >
>> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
>> >> >> > > it that mate inside the cavity. But one of the two spring contacts
>> >> >> > > inside is "rubberized", so only the one contact hits metal to
>> >> >> > > metal.
>> >> >> > > So the P.S. only works using the cord to go from the P.S. into the
>> >> >> > > radial DC jack. Strange?
>> >> >> > >
>> >> >> > > DC
>> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
>> >> >> > wrote:
>> >> >> > > >
>> >> >> > > > Great job, Doug!
>> >> >> > > >
>> >> >> > > > Isn't it nice when you manage to salvage one of these beautiful
>> >> >> > machines? And yep, that's the way it works.
>> >> >> > > >
>> >> >> > > > Once you restore battery power to the 1287A, the CMOS registers
>> >> >> > are again active. It's just that they're filled with nonsense, so
>> >> >> > the
>> >> >> > computer tells you the clock had stopped (which it did), and simply
>> >> >> > prompts you to reset the time. Once you do that and reboot,
>> >> >> > everything's hunky-dory.
>> >> >> > > >
>> >> >> > > > You can probably find some more 256K sticks somewhere and
>> >> >> > > > upgrade
>> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great
>> >> >> > to
>> >> >> > hear the HDD is good too.
>> >> >> > > >
>> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
>> >> >> > > > that
>> >> >> > I looked at, however it was strange. It was definitely branded a
>> >> >> > 1520,
>> >> >> > and advertised that way, but the flip up screen said it was a 386
>> >> >> > machine. I decided to get it, and it was only about $90 with
>> >> >> > shipping.
>> >> >> > When I got the machine, I was very excited when it began to post,
>> >> >> > because I got a full 8MB of RAM! It of course displayed the
>> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
>> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but that
>> >> >> > was
>> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
>> >> >> > Imagine my surprise and joy when I took the keyboard off to discover
>> >> >> > that not only was this really a 386 machine (a 1530), but it also
>> >> >> > had
>> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
>> >> >> > this
>> >> >> > solved the configuration error just fine. But alas, I didn't get a
>> >> >> > triple crown winner here. The Conner drive was definitely dead. But
>> >> >> > heck, getting another HDD is easy compared to the other benefits!
>> >> >> > The
>> >> >> > original owner of this machine definitely took care of it.
>> >> >> > > >
>> >> >> > > > Phil
>> >> >> > > >
>> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > >
>> >> >> > > > > It runs! Hard Disk is GOOD.
>> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires to
>> >> >> > > > > a
>> >> >> > convenient place for the battery. Upon power up it said
>> >> >> > > > > that the RTC was stopped, and it needed setting.
>> >> >> > > > > The "stopped" message threw me, I thought something was wrong
>> >> >> > > > > with
>> >> >> > > > > the chip. It took an F1 to continue and went right through
>> >> >> > > > > POST
>> >> >> > and Autoexec.
>> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
>> >> >> > > > > Now it boots cleanly.
>> >> >> > > > > Has Lotus123 on the HD.
>> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
>> >> >> > > > > The only remaining issue is that a few keys on the keyboard
>> >> >> > > > > don't work. 123Q and spacebar. From an external kbd everything
>> >> >> > > > > works.
>> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM,
>> >> >> > > > > a
>> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > >
>> >> >> > > > > > Thanks so much that was great info. I had no idea on the X2
>> >> >> > > > > > being a rating. May have to try it without them just to
>> >> >> > > > > > make sure the rest of it is still good.
>> >> >> > > > > >
>> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
>> >> >> > <andrebakken@> wrote:
>> >> >> > > > > > >
>> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
>> >> >> > > > > > > difference.
>> >> >> > The X2 also signifies they're an enhanced type meant to go directly
>> >> >> > across the mains. Be sure to get X2 rated replacements.
>> >> >> > > > > > > The PSU will work without those cap's in place, but will
>> >> >> > radiate more interference/noise out onto the mains.
>> >> >> > > > > > >
>> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > > > >
>> >> >> > > > > > > > There are two in there that are the same.
>> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
>> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
>> >> >> > > > > > > > I have them out already.
>> >> >> > > > > > > > Thanks for the tip on the 1287A
>> >> >> > > > > > > >
>> >> >> > > > > > > > DC
>> >> >> > > > > > > >
>> >> >> > > > > > > >
>> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
>> >> >> > wrote:
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > Good Find, DC
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > I guess they got burnt to the point where you can't
>> >> >> > identify the capcity amount. Could you give me the output voltage
>> >> >> > and
>> >> >> > amperage? I'll look through my units and see if I can identify them
>> >> >> > for you.
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > Phil
>> >> >> > > > > > > > >
>> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap in
>> >> >> > the ext p.s. unit. A stinky melt down!
>> >> >> > > > > > > > > > I'm supposing I can replace these.
>> >> >> > > > > > > > > > Any identification tips welcome, thanks.
>> >> >> > > > > > > > > > There appears to be two of the same caps, would
>> >> >> > replace both
>> >> >> > > > > > > > > > of course.
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > > > DC
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
>> >> >> > > > > > > > > > > that
>> >> >> > > > > > > > > > > does not respond to the power switch. The power
>> >> >> > > > > > > > > > > supply
>> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
>> >> >> > (unfortunately,
>> >> >> > > > > > > > > > > that would have been an easy problem isolation!)
>> >> >> > > > > > > > > > > So its something internal. I have the service
>> >> >> > > > > > > > > > > manuals
>> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
>> >> >> > > > > > > > > > > pointers
>> >> >> > form
>> >> >> > > > > > > > > > > folks who have already performed cold stone dead
>> >> >> > diagnosis.
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean 1530
>> >> >> > > > > > > > > > > will
>> >> >> > > > > > > > > > > be available for parts/repair!
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > > > Thanks in advance,
>> >> >> > > > > > > > > > > DC
>> >> >> > > > > > > > > > >
>> >> >> > > > > > > > > >
>> >> >> > > > > > > > >
>> >> >> > > > > > > >
>> >> >> > > > > > >
>> >> >> > > > > >
>> >> >> > > > >
>> >> >> > > >
>> >> >> > >
>> >> >> >
>> >> >>
>> >> >> Since we are on the topic of TCP does anyone have a formula stashed
>> >> >> that
>> >> >> can be easily had to run say serial (probably ppp) from something like
>> >> >> a
>> >> >> small system like the raspberry pi serially to a system with dos and a
>> >> >> stack? It's been so long since I messed with dos environment
>> >> >> networking
>> >> >> I forget.
>> >> >>
>> >> >> I think windows of some sort had trumpet to handle part of the
>> >> >> equation,
>> >> >> but I don' t have any references right now over a dos stack.
>> >> >>
>> >> >> Probably something to do windows 3.1 or win95 / win98 would be better,
>> >> >> but I don't know if the hardware here would be up to those os's.
>> >> >>
>> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
>> >> >> asking for everything here. Objective is to have something that could
>> >> >> suck off or load a disk image with a floppy boot. I suspect it was a
>> >> >> difficult thing to get going in the day, though, and even wors now.
>> >> >>
>> >> >> jim
>> >> >> >
>> >> >> > ,___
>> >> >> >
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------
>> >> >
>> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >
>> >> >
>> >> >
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
>
Date: Tue, 16 Oct 2012 18:22:44 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
That might be very interesting!
I keep trying to get away from SCSI but it keeps sneaking back to me.
I never used any of the ieee-488 computer equipment in the day, but
did use lab equipment with it in the mid 90's. Slow but
functional.
--- In RuGRiD-Laptop@yahoogroups.com, Lawrence Walker <bigwalk_ca@...> wrote:
>
> I bought a GRID SCSI adaptor (the slide-in type like the VGA and power adaptors) many years ago in my enthusiactic Grid period. I must admit that I never tried it out and it is buried in my Grid boxes. There was also a program with it which inserted an interrupt entry in the BIOS to transfer control to the SCSI BIOS on the adaptor hardware like one finds with video gear The vendor also had another adaptor which allowed connection to IEE? devices like on the Commodore output. If there is any interest I could dig out the program and send an image of it.
>
>
>
>
>
>
> >________________________________
> > From: "techtalklive@..." <doug@...>
> >To: RuGRiD-Laptop@yahoogroups.com
> >Sent: Monday, October 15, 2012 9:47:39 PM
> >Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >
> >
> >
> >Its a 1530... clock is... I dont know 20Mhz?
> >Yes checking out Backpacks now. Just collected drivers from
> >around the web for them and am checking on ebay for
> >equipment. I suspect they will work.
> >
> >I thought I might take a look to see if there was parallel port
> >software that would work like "laplink" to tether to another PC
> >but would make a directory/drive on the the host PC appear as a drive to the 1530.
> >
> >That would be cool... and avoid purchasing old hardware.
> >
> >--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >>
> >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> >> make it, but it would be breathing hard. As for parallel drives, see if you
> >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> >> the parallel port, but I haven't tried it on the GRiD yet.
> >>
> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> "She said it was either her or the ham radio. Over."
> >>
> >>
> >> ----- Original Message -----
> >> From: "techtalklive@" <doug@>
> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> Sent: Sunday, October 14, 2012 7:48 PM
> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >>
> >>
> >> >
> >> > Agreed! The Xircom Parallel port 10bT is available but has limited driver
> >> > support.
> >> > Other similar devices don't seem to be on the used market right not.
> >> > I'm also considering a parallel based disk drive at this point.
> >> > Yes, ISA itself would have a hard time saturating 10bT I think... I didn't
> >> > actually run the numbers.
> >> > DC
> >> >
> >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >> >>
> >> >> I don't think I'd even bother with the serial port. You might get
> >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> >> >> 16550AFN
> >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> >> >> have
> >> >> to slow it down with CTS/RTS handshaking. I think the standard parallel
> >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> >> >> even
> >> >> if you could directly tie in to the ISA bus, it would be tough.
> >> >>
> >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> >> "She said it was either her or the ham radio. Over."
> >> >>
> >> >>
> >> >> ----- Original Message -----
> >> >> From: "Androgenoide" <androgenoide@>
> >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> >> Sent: Friday, October 12, 2012 3:37 PM
> >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> >>
> >> >>
> >> >> > The only real obstacle to DOS networking with the Grid is finding an
> >> >> > Ethernet adapter that will work through either the serial or parallel
> >> >> > ports. I used the Xircom on the parallel port because I had one at
> >> >> > the
> >> >> > time. I've got a serial device server now that would probably work
> >> >> > too
> >> >> > but I've got too much going on at the moment to dig out a Grid just to
> >> >> > see
> >> >> > what would be required. Either of those solutions would be limited by
> >> >> > the speed of the ports(and the Grid itself), of course. Gigabit speeds
> >> >> > are out of the question!
> >> >> > Another thought... The guy who put together the Techworm boot disk also
> >> >> > had one called Networm, a single floppy that could do a dialup internet
> >> >> > connection... (if you still have access to a dialup service... if not,
> >> >> > Budget Dial Up has a prepaid service that allows you to buy just a few
> >> >> > hours at a time).
> >> >> >
> >> >> > Generally speaking, if an old machine has either a serial or parallel
> >> >> > port
> >> >> > and you can get it to boot into DOS, there is always a way to transfer
> >> >> > files to another machine. Even if it has no floppy you can use
> >> >> > another
> >> >> > DOS machine running Laplink. If it does have a floppy there are a lot
> >> >> > of
> >> >> > file transfer programs out there, from Kermit to the original version
> >> >> > of
> >> >> > Procomm that will fit on a single floppy.
> >> >> >
> >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a full
> >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be tricky
> >> >> > and
> >> >> > would require some hardware tweaks even to make a slow machine... kind
> >> >> > of
> >> >> > an extreme project. I've heard of a Linux distro that will fit on a
> >> >> > single floppy and run on systems with limited resources
> >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that one
> >> >> > seems to want 4MB of RAM.
> >> >> >
> >> >> > There are plenty of people on the web who have too much time on their
> >> >> > hands and are still playing with machines even older than the Grid...
> >> >> > You
> >> >> > can still buy new after-market accessories for Commodores, for example,
> >> >> > so
> >> >> > don't assume that there are no new solutions to old problems.
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> >> >> >>
> >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >> >> >> >
> >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel port
> >> >> >> > to
> >> >> >> > a NIC... although I've been wondering lately if it might not have
> >> >> >> > made
> >> >> >> > equally good sense to use a device server on the serial port...?
> >> >> >> > And,
> >> >> >> > of course, the Arachne browser... not many choices for a DOS browser
> >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to say
> >> >> >> > that it gave a whole new dimension of meaning to the word "slow." Go
> >> >> >> > ahead, make a pot of tea while it's loading that page, it will be a
> >> >> >> > while.
> >> >> >> >
> >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> >> >> >> > last
> >> >> >> > week of a guy who was competing with a friend to see who could force
> >> >> >> > Windows XP to run with the least resources. It won't install unless
> >> >> >> > it
> >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> >> >> >> > installed
> >> >> >> > you can remove RAM and underclock the machine... He said he got one
> >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> >> >> >> > half
> >> >> >> > hour to boot.
> >> >> >> >
> >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> >> >> >> > else
> >> >> >> > to do (Hah!) it might be interesting to see if I can get online with
> >> >> >> > a
> >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> >> >> >> > OS/browser
> >> >> >> > could be ported to a 95LX?)... or maybe not...
> >> >> >> >
> >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> >> >> >> > <doug@> wrote:
> >> >> >> > >
> >> >> >> > > Like the hack job? :O
> >> >> >> > >
> >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped screes?
> >> >> >> > > Should I take the kbd apart and clean it (will that likely
> >> >> >> > > fix it?) or look for a replacement?
> >> >> >> > >
> >> >> >> > > So what can I do with this thing if I put more mem in it?
> >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> >> >> >> > > I have a coprocessor I could put in this but not sure of
> >> >> >> > > the point there.
> >> >> >> > >
> >> >> >> > > I think I might like to accomplish getting it on the web.
> >> >> >> > > I'd need the LAN hardware I guess.
> >> >> >> > > Any other ideas?
> >> >> >> > >
> >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> >> >> >> > > it that mate inside the cavity. But one of the two spring contacts
> >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> >> >> >> > > metal.
> >> >> >> > > So the P.S. only works using the cord to go from the P.S. into the
> >> >> >> > > radial DC jack. Strange?
> >> >> >> > >
> >> >> >> > > DC
> >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
> >> >> >> > wrote:
> >> >> >> > > >
> >> >> >> > > > Great job, Doug!
> >> >> >> > > >
> >> >> >> > > > Isn't it nice when you manage to salvage one of these beautiful
> >> >> >> > machines? And yep, that's the way it works.
> >> >> >> > > >
> >> >> >> > > > Once you restore battery power to the 1287A, the CMOS registers
> >> >> >> > are again active. It's just that they're filled with nonsense, so
> >> >> >> > the
> >> >> >> > computer tells you the clock had stopped (which it did), and simply
> >> >> >> > prompts you to reset the time. Once you do that and reboot,
> >> >> >> > everything's hunky-dory.
> >> >> >> > > >
> >> >> >> > > > You can probably find some more 256K sticks somewhere and
> >> >> >> > > > upgrade
> >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22. Great
> >> >> >> > to
> >> >> >> > hear the HDD is good too.
> >> >> >> > > >
> >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> >> >> >> > > > that
> >> >> >> > I looked at, however it was strange. It was definitely branded a
> >> >> >> > 1520,
> >> >> >> > and advertised that way, but the flip up screen said it was a 386
> >> >> >> > machine. I decided to get it, and it was only about $90 with
> >> >> >> > shipping.
> >> >> >> > When I got the machine, I was very excited when it began to post,
> >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but that
> >> >> >> > was
> >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> >> >> >> > Imagine my surprise and joy when I took the keyboard off to discover
> >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> >> >> >> > had
> >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> >> >> >> > this
> >> >> >> > solved the configuration error just fine. But alas, I didn't get a
> >> >> >> > triple crown winner here. The Conner drive was definitely dead. But
> >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> >> >> >> > The
> >> >> >> > original owner of this machine definitely took care of it.
> >> >> >> > > >
> >> >> >> > > > Phil
> >> >> >> > > >
> >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > >
> >> >> >> > > > > It runs! Hard Disk is GOOD.
> >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires to
> >> >> >> > > > > a
> >> >> >> > convenient place for the battery. Upon power up it said
> >> >> >> > > > > that the RTC was stopped, and it needed setting.
> >> >> >> > > > > The "stopped" message threw me, I thought something was wrong
> >> >> >> > > > > with
> >> >> >> > > > > the chip. It took an F1 to continue and went right through
> >> >> >> > > > > POST
> >> >> >> > and Autoexec.
> >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> >> >> >> > > > > Now it boots cleanly.
> >> >> >> > > > > Has Lotus123 on the HD.
> >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd everything
> >> >> >> > > > > works.
> >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB RAM,
> >> >> >> > > > > a
> >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> >> >> >> > > > >
> >> >> >> > > > >
> >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > >
> >> >> >> > > > > > Thanks so much that was great info. I had no idea on the X2
> >> >> >> > > > > > being a rating. May have to try it without them just to
> >> >> >> > > > > > make sure the rest of it is still good.
> >> >> >> > > > > >
> >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> >> >> >> > <andrebakken@> wrote:
> >> >> >> > > > > > >
> >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> >> >> >> > > > > > > difference.
> >> >> >> > The X2 also signifies they're an enhanced type meant to go directly
> >> >> >> > across the mains. Be sure to get X2 rated replacements.
> >> >> >> > > > > > > The PSU will work without those cap's in place, but will
> >> >> >> > radiate more interference/noise out onto the mains.
> >> >> >> > > > > > >
> >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > > > >
> >> >> >> > > > > > > > There are two in there that are the same.
> >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> >> >> >> > > > > > > > I have them out already.
> >> >> >> > > > > > > > Thanks for the tip on the 1287A
> >> >> >> > > > > > > >
> >> >> >> > > > > > > > DC
> >> >> >> > > > > > > >
> >> >> >> > > > > > > >
> >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian" <Jeriddian@>
> >> >> >> > wrote:
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > Good Find, DC
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> >> >> >> > identify the capcity amount. Could you give me the output voltage
> >> >> >> > and
> >> >> >> > amperage? I'll look through my units and see if I can identify them
> >> >> >> > for you.
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > Phil
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap in
> >> >> >> > the ext p.s. unit. A stinky melt down!
> >> >> >> > > > > > > > > > I'm supposing I can replace these.
> >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> >> >> >> > replace both
> >> >> >> > > > > > > > > > of course.
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > > > DC
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> >> >> >> > > > > > > > > > > that
> >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> >> >> >> > > > > > > > > > > supply
> >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> >> >> >> > (unfortunately,
> >> >> >> > > > > > > > > > > that would have been an easy problem isolation!)
> >> >> >> > > > > > > > > > > So its something internal. I have the service
> >> >> >> > > > > > > > > > > manuals
> >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> >> >> >> > > > > > > > > > > pointers
> >> >> >> > form
> >> >> >> > > > > > > > > > > folks who have already performed cold stone dead
> >> >> >> > diagnosis.
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean 1530
> >> >> >> > > > > > > > > > > will
> >> >> >> > > > > > > > > > > be available for parts/repair!
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > > > Thanks in advance,
> >> >> >> > > > > > > > > > > DC
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > >
> >> >> >> > > > > > >
> >> >> >> > > > > >
> >> >> >> > > > >
> >> >> >> > > >
> >> >> >> > >
> >> >> >> >
> >> >> >>
> >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> >> >> >> that
> >> >> >> can be easily had to run say serial (probably ppp) from something like
> >> >> >> a
> >> >> >> small system like the raspberry pi serially to a system with dos and a
> >> >> >> stack? It's been so long since I messed with dos environment
> >> >> >> networking
> >> >> >> I forget.
> >> >> >>
> >> >> >> I think windows of some sort had trumpet to handle part of the
> >> >> >> equation,
> >> >> >> but I don' t have any references right now over a dos stack.
> >> >> >>
> >> >> >> Probably something to do windows 3.1 or win95 / win98 would be better,
> >> >> >> but I don't know if the hardware here would be up to those os's.
> >> >> >>
> >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too. I'm
> >> >> >> asking for everything here. Objective is to have something that could
> >> >> >> suck off or load a disk image with a floppy boot. I suspect it was a
> >> >> >> difficult thing to get going in the day, though, and even wors now.
> >> >> >>
> >> >> >> jim
> >> >> >> >
> >> >> >> > ,___
> >> >> >> >
> >> >> >>
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > ------------------------------------
> >> >> >
> >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >> >
> >> >> >
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> >
>
Date: Tue, 16 Oct 2012 18:25:15 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
As I might have mentioned in another post, if I could get
another PC to appear as a mounted drive to the GRiD I'd be in
real fat city. Then I'd have the machine wide open to the rest of the world.
Any ideas there?
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> Good luck with the Backpack stuff.
>
> There's a book called "Hot Links", which was produced by the same people
> that produced LapLink. In the back of the book is a disk with programs that
> will let you transfer files, either via null modem cable or LapLink cable.
> I doubt that the book is still in print, but it might be something to look
> for. If you get the book without the disk, let me know, and I'll get you
> the software. I can't remember if it lets you map the host drive to the
> client machine, but that would be cool, if it does that.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: "techtalklive@..." <doug@...>
> To: <RuGRiD-Laptop@yahoogroups.com>
> Sent: Monday, October 15, 2012 10:47 PM
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> > Its a 1530... clock is... I dont know 20Mhz?
> > Yes checking out Backpacks now. Just collected drivers from
> > around the web for them and am checking on ebay for
> > equipment. I suspect they will work.
> >
> > I thought I might take a look to see if there was parallel port
> > software that would work like "laplink" to tether to another PC
> > but would make a directory/drive on the the host PC appear as a drive to
> > the 1530.
> >
> > That would be cool... and avoid purchasing old hardware.
> >
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >>
> >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> >> make it, but it would be breathing hard. As for parallel drives, see if
> >> you
> >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> >> the parallel port, but I haven't tried it on the GRiD yet.
> >>
> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> "She said it was either her or the ham radio. Over."
> >>
> >>
> >> ----- Original Message -----
> >> From: "techtalklive@" <doug@>
> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> Sent: Sunday, October 14, 2012 7:48 PM
> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >>
> >>
> >> >
> >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> >> > driver
> >> > support.
> >> > Other similar devices don't seem to be on the used market right not.
> >> > I'm also considering a parallel based disk drive at this point.
> >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> >> > didn't
> >> > actually run the numbers.
> >> > DC
> >> >
> >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >> >>
> >> >> I don't think I'd even bother with the serial port. You might get
> >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> >> >> 16550AFN
> >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> >> >> have
> >> >> to slow it down with CTS/RTS handshaking. I think the standard
> >> >> parallel
> >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> >> >> even
> >> >> if you could directly tie in to the ISA bus, it would be tough.
> >> >>
> >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> >> "She said it was either her or the ham radio. Over."
> >> >>
> >> >>
> >> >> ----- Original Message -----
> >> >> From: "Androgenoide" <androgenoide@>
> >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> >> Sent: Friday, October 12, 2012 3:37 PM
> >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> >>
> >> >>
> >> >> > The only real obstacle to DOS networking with the Grid is finding an
> >> >> > Ethernet adapter that will work through either the serial or
> >> >> > parallel
> >> >> > ports. I used the Xircom on the parallel port because I had one at
> >> >> > the
> >> >> > time. I've got a serial device server now that would probably work
> >> >> > too
> >> >> > but I've got too much going on at the moment to dig out a Grid just
> >> >> > to
> >> >> > see
> >> >> > what would be required. Either of those solutions would be limited
> >> >> > by
> >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> >> >> > speeds
> >> >> > are out of the question!
> >> >> > Another thought... The guy who put together the Techworm boot disk
> >> >> > also
> >> >> > had one called Networm, a single floppy that could do a dialup
> >> >> > internet
> >> >> > connection... (if you still have access to a dialup service... if
> >> >> > not,
> >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> >> >> > few
> >> >> > hours at a time).
> >> >> >
> >> >> > Generally speaking, if an old machine has either a serial or
> >> >> > parallel
> >> >> > port
> >> >> > and you can get it to boot into DOS, there is always a way to
> >> >> > transfer
> >> >> > files to another machine. Even if it has no floppy you can use
> >> >> > another
> >> >> > DOS machine running Laplink. If it does have a floppy there are a
> >> >> > lot
> >> >> > of
> >> >> > file transfer programs out there, from Kermit to the original
> >> >> > version
> >> >> > of
> >> >> > Procomm that will fit on a single floppy.
> >> >> >
> >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> >> >> > full
> >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> >> >> > tricky
> >> >> > and
> >> >> > would require some hardware tweaks even to make a slow machine...
> >> >> > kind
> >> >> > of
> >> >> > an extreme project. I've heard of a Linux distro that will fit on
> >> >> > a
> >> >> > single floppy and run on systems with limited resources
> >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> >> >> > one
> >> >> > seems to want 4MB of RAM.
> >> >> >
> >> >> > There are plenty of people on the web who have too much time on
> >> >> > their
> >> >> > hands and are still playing with machines even older than the
> >> >> > Grid...
> >> >> > You
> >> >> > can still buy new after-market accessories for Commodores, for
> >> >> > example,
> >> >> > so
> >> >> > don't assume that there are no new solutions to old problems.
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> >> >> >>
> >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >> >> >> >
> >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> >> >> >> > port
> >> >> >> > to
> >> >> >> > a NIC... although I've been wondering lately if it might not have
> >> >> >> > made
> >> >> >> > equally good sense to use a device server on the serial port...?
> >> >> >> > And,
> >> >> >> > of course, the Arachne browser... not many choices for a DOS
> >> >> >> > browser
> >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> >> >> >> > say
> >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> >> >> >> > Go
> >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> >> >> >> > a
> >> >> >> > while.
> >> >> >> >
> >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> >> >> >> > last
> >> >> >> > week of a guy who was competing with a friend to see who could
> >> >> >> > force
> >> >> >> > Windows XP to run with the least resources. It won't install
> >> >> >> > unless
> >> >> >> > it
> >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> >> >> >> > installed
> >> >> >> > you can remove RAM and underclock the machine... He said he got
> >> >> >> > one
> >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> >> >> >> > half
> >> >> >> > hour to boot.
> >> >> >> >
> >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> >> >> >> > else
> >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> >> >> >> > with
> >> >> >> > a
> >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> >> >> >> > OS/browser
> >> >> >> > could be ported to a 95LX?)... or maybe not...
> >> >> >> >
> >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> >> >> >> > <doug@> wrote:
> >> >> >> > >
> >> >> >> > > Like the hack job? :O
> >> >> >> > >
> >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> >> >> >> > > screes?
> >> >> >> > > Should I take the kbd apart and clean it (will that likely
> >> >> >> > > fix it?) or look for a replacement?
> >> >> >> > >
> >> >> >> > > So what can I do with this thing if I put more mem in it?
> >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> >> >> >> > > I have a coprocessor I could put in this but not sure of
> >> >> >> > > the point there.
> >> >> >> > >
> >> >> >> > > I think I might like to accomplish getting it on the web.
> >> >> >> > > I'd need the LAN hardware I guess.
> >> >> >> > > Any other ideas?
> >> >> >> > >
> >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> >> >> >> > > it that mate inside the cavity. But one of the two spring
> >> >> >> > > contacts
> >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> >> >> >> > > metal.
> >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> >> >> >> > > the
> >> >> >> > > radial DC jack. Strange?
> >> >> >> > >
> >> >> >> > > DC
> >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> >> >> >> > <Jeriddian@>
> >> >> >> > wrote:
> >> >> >> > > >
> >> >> >> > > > Great job, Doug!
> >> >> >> > > >
> >> >> >> > > > Isn't it nice when you manage to salvage one of these
> >> >> >> > > > beautiful
> >> >> >> > machines? And yep, that's the way it works.
> >> >> >> > > >
> >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> >> >> >> > > > registers
> >> >> >> > are again active. It's just that they're filled with nonsense, so
> >> >> >> > the
> >> >> >> > computer tells you the clock had stopped (which it did), and
> >> >> >> > simply
> >> >> >> > prompts you to reset the time. Once you do that and reboot,
> >> >> >> > everything's hunky-dory.
> >> >> >> > > >
> >> >> >> > > > You can probably find some more 256K sticks somewhere and
> >> >> >> > > > upgrade
> >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> >> >> >> > Great
> >> >> >> > to
> >> >> >> > hear the HDD is good too.
> >> >> >> > > >
> >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> >> >> >> > > > that
> >> >> >> > I looked at, however it was strange. It was definitely branded a
> >> >> >> > 1520,
> >> >> >> > and advertised that way, but the flip up screen said it was a 386
> >> >> >> > machine. I decided to get it, and it was only about $90 with
> >> >> >> > shipping.
> >> >> >> > When I got the machine, I was very excited when it began to post,
> >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> >> >> >> > that
> >> >> >> > was
> >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> >> >> >> > discover
> >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> >> >> >> > had
> >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> >> >> >> > this
> >> >> >> > solved the configuration error just fine. But alas, I didn't get
> >> >> >> > a
> >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> >> >> >> > But
> >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> >> >> >> > The
> >> >> >> > original owner of this machine definitely took care of it.
> >> >> >> > > >
> >> >> >> > > > Phil
> >> >> >> > > >
> >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > >
> >> >> >> > > > > It runs! Hard Disk is GOOD.
> >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> >> >> >> > > > > to
> >> >> >> > > > > a
> >> >> >> > convenient place for the battery. Upon power up it said
> >> >> >> > > > > that the RTC was stopped, and it needed setting.
> >> >> >> > > > > The "stopped" message threw me, I thought something was
> >> >> >> > > > > wrong
> >> >> >> > > > > with
> >> >> >> > > > > the chip. It took an F1 to continue and went right through
> >> >> >> > > > > POST
> >> >> >> > and Autoexec.
> >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> >> >> >> > > > > Now it boots cleanly.
> >> >> >> > > > > Has Lotus123 on the HD.
> >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> >> >> >> > > > > everything
> >> >> >> > > > > works.
> >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> >> >> >> > > > > RAM,
> >> >> >> > > > > a
> >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> >> >> >> > > > >
> >> >> >> > > > >
> >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > >
> >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> >> >> >> > > > > > X2
> >> >> >> > > > > > being a rating. May have to try it without them just to
> >> >> >> > > > > > make sure the rest of it is still good.
> >> >> >> > > > > >
> >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> >> >> >> > <andrebakken@> wrote:
> >> >> >> > > > > > >
> >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> >> >> >> > > > > > > difference.
> >> >> >> > The X2 also signifies they're an enhanced type meant to go
> >> >> >> > directly
> >> >> >> > across the mains. Be sure to get X2 rated replacements.
> >> >> >> > > > > > > The PSU will work without those cap's in place, but
> >> >> >> > > > > > > will
> >> >> >> > radiate more interference/noise out onto the mains.
> >> >> >> > > > > > >
> >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > > > >
> >> >> >> > > > > > > > There are two in there that are the same.
> >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> >> >> >> > > > > > > > I have them out already.
> >> >> >> > > > > > > > Thanks for the tip on the 1287A
> >> >> >> > > > > > > >
> >> >> >> > > > > > > > DC
> >> >> >> > > > > > > >
> >> >> >> > > > > > > >
> >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> >> >> >> > <Jeriddian@>
> >> >> >> > wrote:
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > Good Find, DC
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> >> >> >> > identify the capcity amount. Could you give me the output voltage
> >> >> >> > and
> >> >> >> > amperage? I'll look through my units and see if I can identify
> >> >> >> > them
> >> >> >> > for you.
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > Phil
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> >> >> >> > > > > > > > > > in
> >> >> >> > the ext p.s. unit. A stinky melt down!
> >> >> >> > > > > > > > > > I'm supposing I can replace these.
> >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> >> >> >> > replace both
> >> >> >> > > > > > > > > > of course.
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > > > DC
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> >> >> >> > wrote:
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> >> >> >> > > > > > > > > > > that
> >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> >> >> >> > > > > > > > > > > supply
> >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> >> >> >> > (unfortunately,
> >> >> >> > > > > > > > > > > that would have been an easy problem
> >> >> >> > > > > > > > > > > isolation!)
> >> >> >> > > > > > > > > > > So its something internal. I have the service
> >> >> >> > > > > > > > > > > manuals
> >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> >> >> >> > > > > > > > > > > pointers
> >> >> >> > form
> >> >> >> > > > > > > > > > > folks who have already performed cold stone
> >> >> >> > > > > > > > > > > dead
> >> >> >> > diagnosis.
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> >> >> >> > > > > > > > > > > 1530
> >> >> >> > > > > > > > > > > will
> >> >> >> > > > > > > > > > > be available for parts/repair!
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > > > Thanks in advance,
> >> >> >> > > > > > > > > > > DC
> >> >> >> > > > > > > > > > >
> >> >> >> > > > > > > > > >
> >> >> >> > > > > > > > >
> >> >> >> > > > > > > >
> >> >> >> > > > > > >
> >> >> >> > > > > >
> >> >> >> > > > >
> >> >> >> > > >
> >> >> >> > >
> >> >> >> >
> >> >> >>
> >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> >> >> >> that
> >> >> >> can be easily had to run say serial (probably ppp) from something
> >> >> >> like
> >> >> >> a
> >> >> >> small system like the raspberry pi serially to a system with dos
> >> >> >> and a
> >> >> >> stack? It's been so long since I messed with dos environment
> >> >> >> networking
> >> >> >> I forget.
> >> >> >>
> >> >> >> I think windows of some sort had trumpet to handle part of the
> >> >> >> equation,
> >> >> >> but I don' t have any references right now over a dos stack.
> >> >> >>
> >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> >> >> >> better,
> >> >> >> but I don't know if the hardware here would be up to those os's.
> >> >> >>
> >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> >> >> >> I'm
> >> >> >> asking for everything here. Objective is to have something that
> >> >> >> could
> >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> >> >> >> a
> >> >> >> difficult thing to get going in the day, though, and even wors now.
> >> >> >>
> >> >> >> jim
> >> >> >> >
> >> >> >> > ,___
> >> >> >> >
> >> >> >>
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > ------------------------------------
> >> >> >
> >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >> >
> >> >> >
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
Date: Wed, 17 Oct 2012 02:09:14 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> As I might have mentioned in another post, if I could get
> another PC to appear as a mounted drive to the GRiD I'd be in
> real fat city. Then I'd have the machine wide open to the rest of the world.
> Any ideas there?
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >
> > Good luck with the Backpack stuff.
> >
> > There's a book called "Hot Links", which was produced by the same people
> > that produced LapLink. In the back of the book is a disk with programs that
> > will let you transfer files, either via null modem cable or LapLink cable.
> > I doubt that the book is still in print, but it might be something to look
> > for. If you get the book without the disk, let me know, and I'll get you
> > the software. I can't remember if it lets you map the host drive to the
> > client machine, but that would be cool, if it does that.
> >
> > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > "She said it was either her or the ham radio. Over."
> >
> >
> > ----- Original Message -----
> > From: "techtalklive@" <doug@>
> > To: <RuGRiD-Laptop@yahoogroups.com>
> > Sent: Monday, October 15, 2012 10:47 PM
> > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >
> >
> > > Its a 1530... clock is... I dont know 20Mhz?
> > > Yes checking out Backpacks now. Just collected drivers from
> > > around the web for them and am checking on ebay for
> > > equipment. I suspect they will work.
> > >
> > > I thought I might take a look to see if there was parallel port
> > > software that would work like "laplink" to tether to another PC
> > > but would make a directory/drive on the the host PC appear as a drive to
> > > the 1530.
> > >
> > > That would be cool... and avoid purchasing old hardware.
> > >
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >>
> > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > >> make it, but it would be breathing hard. As for parallel drives, see if
> > >> you
> > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > >> the parallel port, but I haven't tried it on the GRiD yet.
> > >>
> > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> "She said it was either her or the ham radio. Over."
> > >>
> > >>
> > >> ----- Original Message -----
> > >> From: "techtalklive@" <doug@>
> > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> Sent: Sunday, October 14, 2012 7:48 PM
> > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >>
> > >>
> > >> >
> > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > >> > driver
> > >> > support.
> > >> > Other similar devices don't seem to be on the used market right not.
> > >> > I'm also considering a parallel based disk drive at this point.
> > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > >> > didn't
> > >> > actually run the numbers.
> > >> > DC
> > >> >
> > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >> >>
> > >> >> I don't think I'd even bother with the serial port. You might get
> > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > >> >> 16550AFN
> > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > >> >> have
> > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > >> >> parallel
> > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > >> >> even
> > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > >> >>
> > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> "She said it was either her or the ham radio. Over."
> > >> >>
> > >> >>
> > >> >> ----- Original Message -----
> > >> >> From: "Androgenoide" <androgenoide@>
> > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >>
> > >> >>
> > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > >> >> > Ethernet adapter that will work through either the serial or
> > >> >> > parallel
> > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > >> >> > the
> > >> >> > time. I've got a serial device server now that would probably work
> > >> >> > too
> > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > >> >> > to
> > >> >> > see
> > >> >> > what would be required. Either of those solutions would be limited
> > >> >> > by
> > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > >> >> > speeds
> > >> >> > are out of the question!
> > >> >> > Another thought... The guy who put together the Techworm boot disk
> > >> >> > also
> > >> >> > had one called Networm, a single floppy that could do a dialup
> > >> >> > internet
> > >> >> > connection... (if you still have access to a dialup service... if
> > >> >> > not,
> > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > >> >> > few
> > >> >> > hours at a time).
> > >> >> >
> > >> >> > Generally speaking, if an old machine has either a serial or
> > >> >> > parallel
> > >> >> > port
> > >> >> > and you can get it to boot into DOS, there is always a way to
> > >> >> > transfer
> > >> >> > files to another machine. Even if it has no floppy you can use
> > >> >> > another
> > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > >> >> > lot
> > >> >> > of
> > >> >> > file transfer programs out there, from Kermit to the original
> > >> >> > version
> > >> >> > of
> > >> >> > Procomm that will fit on a single floppy.
> > >> >> >
> > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > >> >> > full
> > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > >> >> > tricky
> > >> >> > and
> > >> >> > would require some hardware tweaks even to make a slow machine...
> > >> >> > kind
> > >> >> > of
> > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > >> >> > a
> > >> >> > single floppy and run on systems with limited resources
> > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > >> >> > one
> > >> >> > seems to want 4MB of RAM.
> > >> >> >
> > >> >> > There are plenty of people on the web who have too much time on
> > >> >> > their
> > >> >> > hands and are still playing with machines even older than the
> > >> >> > Grid...
> > >> >> > You
> > >> >> > can still buy new after-market accessories for Commodores, for
> > >> >> > example,
> > >> >> > so
> > >> >> > don't assume that there are no new solutions to old problems.
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > >> >> >>
> > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > >> >> >> >
> > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > >> >> >> > port
> > >> >> >> > to
> > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > >> >> >> > made
> > >> >> >> > equally good sense to use a device server on the serial port...?
> > >> >> >> > And,
> > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > >> >> >> > browser
> > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > >> >> >> > say
> > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > >> >> >> > Go
> > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > >> >> >> > a
> > >> >> >> > while.
> > >> >> >> >
> > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > >> >> >> > last
> > >> >> >> > week of a guy who was competing with a friend to see who could
> > >> >> >> > force
> > >> >> >> > Windows XP to run with the least resources. It won't install
> > >> >> >> > unless
> > >> >> >> > it
> > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > >> >> >> > installed
> > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > >> >> >> > one
> > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > >> >> >> > half
> > >> >> >> > hour to boot.
> > >> >> >> >
> > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > >> >> >> > else
> > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > >> >> >> > with
> > >> >> >> > a
> > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > >> >> >> > OS/browser
> > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > >> >> >> >
> > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > >> >> >> > <doug@> wrote:
> > >> >> >> > >
> > >> >> >> > > Like the hack job? :O
> > >> >> >> > >
> > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > >> >> >> > > screes?
> > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > >> >> >> > > fix it?) or look for a replacement?
> > >> >> >> > >
> > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > >> >> >> > > the point there.
> > >> >> >> > >
> > >> >> >> > > I think I might like to accomplish getting it on the web.
> > >> >> >> > > I'd need the LAN hardware I guess.
> > >> >> >> > > Any other ideas?
> > >> >> >> > >
> > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > >> >> >> > > contacts
> > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > >> >> >> > > metal.
> > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > >> >> >> > > the
> > >> >> >> > > radial DC jack. Strange?
> > >> >> >> > >
> > >> >> >> > > DC
> > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > >> >> >> > <Jeriddian@>
> > >> >> >> > wrote:
> > >> >> >> > > >
> > >> >> >> > > > Great job, Doug!
> > >> >> >> > > >
> > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > >> >> >> > > > beautiful
> > >> >> >> > machines? And yep, that's the way it works.
> > >> >> >> > > >
> > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > >> >> >> > > > registers
> > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > >> >> >> > the
> > >> >> >> > computer tells you the clock had stopped (which it did), and
> > >> >> >> > simply
> > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > >> >> >> > everything's hunky-dory.
> > >> >> >> > > >
> > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > >> >> >> > > > upgrade
> > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > >> >> >> > Great
> > >> >> >> > to
> > >> >> >> > hear the HDD is good too.
> > >> >> >> > > >
> > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > >> >> >> > > > that
> > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > >> >> >> > 1520,
> > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > >> >> >> > shipping.
> > >> >> >> > When I got the machine, I was very excited when it began to post,
> > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > >> >> >> > that
> > >> >> >> > was
> > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > >> >> >> > discover
> > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > >> >> >> > had
> > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > >> >> >> > this
> > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > >> >> >> > a
> > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > >> >> >> > But
> > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > >> >> >> > The
> > >> >> >> > original owner of this machine definitely took care of it.
> > >> >> >> > > >
> > >> >> >> > > > Phil
> > >> >> >> > > >
> > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > >> >> >> > wrote:
> > >> >> >> > > > >
> > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > >> >> >> > > > > to
> > >> >> >> > > > > a
> > >> >> >> > convenient place for the battery. Upon power up it said
> > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > >> >> >> > > > > wrong
> > >> >> >> > > > > with
> > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > >> >> >> > > > > POST
> > >> >> >> > and Autoexec.
> > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > >> >> >> > > > > Now it boots cleanly.
> > >> >> >> > > > > Has Lotus123 on the HD.
> > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > >> >> >> > > > > everything
> > >> >> >> > > > > works.
> > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > >> >> >> > > > > RAM,
> > >> >> >> > > > > a
> > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > >> >> >> > > > >
> > >> >> >> > > > >
> > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > >> >> >> > wrote:
> > >> >> >> > > > > >
> > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > >> >> >> > > > > > X2
> > >> >> >> > > > > > being a rating. May have to try it without them just to
> > >> >> >> > > > > > make sure the rest of it is still good.
> > >> >> >> > > > > >
> > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > >> >> >> > <andrebakken@> wrote:
> > >> >> >> > > > > > >
> > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > >> >> >> > > > > > > difference.
> > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > >> >> >> > directly
> > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > >> >> >> > > > > > > will
> > >> >> >> > radiate more interference/noise out onto the mains.
> > >> >> >> > > > > > >
> > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > >> >> >> > wrote:
> > >> >> >> > > > > > > >
> > >> >> >> > > > > > > > There are two in there that are the same.
> > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > >> >> >> > > > > > > > I have them out already.
> > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > >> >> >> > > > > > > >
> > >> >> >> > > > > > > > DC
> > >> >> >> > > > > > > >
> > >> >> >> > > > > > > >
> > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > >> >> >> > <Jeriddian@>
> > >> >> >> > wrote:
> > >> >> >> > > > > > > > >
> > >> >> >> > > > > > > > > Good Find, DC
> > >> >> >> > > > > > > > >
> > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > >> >> >> > and
> > >> >> >> > amperage? I'll look through my units and see if I can identify
> > >> >> >> > them
> > >> >> >> > for you.
> > >> >> >> > > > > > > > >
> > >> >> >> > > > > > > > > Phil
> > >> >> >> > > > > > > > >
> > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > >> >> >> > wrote:
> > >> >> >> > > > > > > > > >
> > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > >> >> >> > > > > > > > > > in
> > >> >> >> > the ext p.s. unit. A stinky melt down!
> > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > >> >> >> > replace both
> > >> >> >> > > > > > > > > > of course.
> > >> >> >> > > > > > > > > >
> > >> >> >> > > > > > > > > > DC
> > >> >> >> > > > > > > > > >
> > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > >> >> >> > wrote:
> > >> >> >> > > > > > > > > > >
> > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > >> >> >> > > > > > > > > > > that
> > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > >> >> >> > > > > > > > > > > supply
> > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > >> >> >> > (unfortunately,
> > >> >> >> > > > > > > > > > > that would have been an easy problem
> > >> >> >> > > > > > > > > > > isolation!)
> > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > >> >> >> > > > > > > > > > > manuals
> > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > >> >> >> > > > > > > > > > > pointers
> > >> >> >> > form
> > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > >> >> >> > > > > > > > > > > dead
> > >> >> >> > diagnosis.
> > >> >> >> > > > > > > > > > >
> > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > >> >> >> > > > > > > > > > > 1530
> > >> >> >> > > > > > > > > > > will
> > >> >> >> > > > > > > > > > > be available for parts/repair!
> > >> >> >> > > > > > > > > > >
> > >> >> >> > > > > > > > > > > Thanks in advance,
> > >> >> >> > > > > > > > > > > DC
> > >> >> >> > > > > > > > > > >
> > >> >> >> > > > > > > > > >
> > >> >> >> > > > > > > > >
> > >> >> >> > > > > > > >
> > >> >> >> > > > > > >
> > >> >> >> > > > > >
> > >> >> >> > > > >
> > >> >> >> > > >
> > >> >> >> > >
> > >> >> >> >
> > >> >> >>
> > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > >> >> >> that
> > >> >> >> can be easily had to run say serial (probably ppp) from something
> > >> >> >> like
> > >> >> >> a
> > >> >> >> small system like the raspberry pi serially to a system with dos
> > >> >> >> and a
> > >> >> >> stack? It's been so long since I messed with dos environment
> > >> >> >> networking
> > >> >> >> I forget.
> > >> >> >>
> > >> >> >> I think windows of some sort had trumpet to handle part of the
> > >> >> >> equation,
> > >> >> >> but I don' t have any references right now over a dos stack.
> > >> >> >>
> > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > >> >> >> better,
> > >> >> >> but I don't know if the hardware here would be up to those os's.
> > >> >> >>
> > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > >> >> >> I'm
> > >> >> >> asking for everything here. Objective is to have something that
> > >> >> >> could
> > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > >> >> >> a
> > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > >> >> >>
> > >> >> >> jim
> > >> >> >> >
> > >> >> >> > ,___
> > >> >> >> >
> > >> >> >>
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >> > ------------------------------------
> > >> >> >
> > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >>
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > ------------------------------------
> > >> >
> > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >> >
> > >> >
> > >> >
> > >>
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >
> > >
> > >
> >
>
Date: Wed, 17 Oct 2012 07:04:05 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Well that sounds promising. The only thing that would
top that would be a native SCSI attached to the bus connectors
in the accessory port. A ParPort one would do in the meantime.
Thanks!
I'm thinking of moding some SIMM chips to go in the SIPP sockets.
Anyone know the mem speed? Hate to take the thing apart right
now to find out.
Thanks!
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
>
> The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > As I might have mentioned in another post, if I could get
> > another PC to appear as a mounted drive to the GRiD I'd be in
> > real fat city. Then I'd have the machine wide open to the rest of the world.
> > Any ideas there?
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >
> > > Good luck with the Backpack stuff.
> > >
> > > There's a book called "Hot Links", which was produced by the same people
> > > that produced LapLink. In the back of the book is a disk with programs that
> > > will let you transfer files, either via null modem cable or LapLink cable.
> > > I doubt that the book is still in print, but it might be something to look
> > > for. If you get the book without the disk, let me know, and I'll get you
> > > the software. I can't remember if it lets you map the host drive to the
> > > client machine, but that would be cool, if it does that.
> > >
> > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > "She said it was either her or the ham radio. Over."
> > >
> > >
> > > ----- Original Message -----
> > > From: "techtalklive@" <doug@>
> > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > Sent: Monday, October 15, 2012 10:47 PM
> > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >
> > >
> > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > Yes checking out Backpacks now. Just collected drivers from
> > > > around the web for them and am checking on ebay for
> > > > equipment. I suspect they will work.
> > > >
> > > > I thought I might take a look to see if there was parallel port
> > > > software that would work like "laplink" to tether to another PC
> > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > the 1530.
> > > >
> > > > That would be cool... and avoid purchasing old hardware.
> > > >
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >>
> > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > >> you
> > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > >>
> > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> "She said it was either her or the ham radio. Over."
> > > >>
> > > >>
> > > >> ----- Original Message -----
> > > >> From: "techtalklive@" <doug@>
> > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >>
> > > >>
> > > >> >
> > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > >> > driver
> > > >> > support.
> > > >> > Other similar devices don't seem to be on the used market right not.
> > > >> > I'm also considering a parallel based disk drive at this point.
> > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > >> > didn't
> > > >> > actually run the numbers.
> > > >> > DC
> > > >> >
> > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >> >>
> > > >> >> I don't think I'd even bother with the serial port. You might get
> > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > >> >> 16550AFN
> > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > >> >> have
> > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > >> >> parallel
> > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > >> >> even
> > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > >> >>
> > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> >> "She said it was either her or the ham radio. Over."
> > > >> >>
> > > >> >>
> > > >> >> ----- Original Message -----
> > > >> >> From: "Androgenoide" <androgenoide@>
> > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >> >>
> > > >> >>
> > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > >> >> > Ethernet adapter that will work through either the serial or
> > > >> >> > parallel
> > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > >> >> > the
> > > >> >> > time. I've got a serial device server now that would probably work
> > > >> >> > too
> > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > >> >> > to
> > > >> >> > see
> > > >> >> > what would be required. Either of those solutions would be limited
> > > >> >> > by
> > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > >> >> > speeds
> > > >> >> > are out of the question!
> > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > >> >> > also
> > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > >> >> > internet
> > > >> >> > connection... (if you still have access to a dialup service... if
> > > >> >> > not,
> > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > >> >> > few
> > > >> >> > hours at a time).
> > > >> >> >
> > > >> >> > Generally speaking, if an old machine has either a serial or
> > > >> >> > parallel
> > > >> >> > port
> > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > >> >> > transfer
> > > >> >> > files to another machine. Even if it has no floppy you can use
> > > >> >> > another
> > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > >> >> > lot
> > > >> >> > of
> > > >> >> > file transfer programs out there, from Kermit to the original
> > > >> >> > version
> > > >> >> > of
> > > >> >> > Procomm that will fit on a single floppy.
> > > >> >> >
> > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > >> >> > full
> > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > >> >> > tricky
> > > >> >> > and
> > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > >> >> > kind
> > > >> >> > of
> > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > >> >> > a
> > > >> >> > single floppy and run on systems with limited resources
> > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > >> >> > one
> > > >> >> > seems to want 4MB of RAM.
> > > >> >> >
> > > >> >> > There are plenty of people on the web who have too much time on
> > > >> >> > their
> > > >> >> > hands and are still playing with machines even older than the
> > > >> >> > Grid...
> > > >> >> > You
> > > >> >> > can still buy new after-market accessories for Commodores, for
> > > >> >> > example,
> > > >> >> > so
> > > >> >> > don't assume that there are no new solutions to old problems.
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > >> >> >>
> > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > >> >> >> >
> > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > >> >> >> > port
> > > >> >> >> > to
> > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > >> >> >> > made
> > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > >> >> >> > And,
> > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > >> >> >> > browser
> > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > >> >> >> > say
> > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > >> >> >> > Go
> > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > >> >> >> > a
> > > >> >> >> > while.
> > > >> >> >> >
> > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > >> >> >> > last
> > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > >> >> >> > force
> > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > >> >> >> > unless
> > > >> >> >> > it
> > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > >> >> >> > installed
> > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > >> >> >> > one
> > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > >> >> >> > half
> > > >> >> >> > hour to boot.
> > > >> >> >> >
> > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > >> >> >> > else
> > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > >> >> >> > with
> > > >> >> >> > a
> > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > >> >> >> > OS/browser
> > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > >> >> >> >
> > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > >> >> >> > <doug@> wrote:
> > > >> >> >> > >
> > > >> >> >> > > Like the hack job? :O
> > > >> >> >> > >
> > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > >> >> >> > > screes?
> > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > >> >> >> > > fix it?) or look for a replacement?
> > > >> >> >> > >
> > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > >> >> >> > > the point there.
> > > >> >> >> > >
> > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > >> >> >> > > I'd need the LAN hardware I guess.
> > > >> >> >> > > Any other ideas?
> > > >> >> >> > >
> > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > >> >> >> > > contacts
> > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > >> >> >> > > metal.
> > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > >> >> >> > > the
> > > >> >> >> > > radial DC jack. Strange?
> > > >> >> >> > >
> > > >> >> >> > > DC
> > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > >
> > > >> >> >> > > > Great job, Doug!
> > > >> >> >> > > >
> > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > >> >> >> > > > beautiful
> > > >> >> >> > machines? And yep, that's the way it works.
> > > >> >> >> > > >
> > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > >> >> >> > > > registers
> > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > >> >> >> > the
> > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > >> >> >> > simply
> > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > >> >> >> > everything's hunky-dory.
> > > >> >> >> > > >
> > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > >> >> >> > > > upgrade
> > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > >> >> >> > Great
> > > >> >> >> > to
> > > >> >> >> > hear the HDD is good too.
> > > >> >> >> > > >
> > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > >> >> >> > > > that
> > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > >> >> >> > 1520,
> > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > >> >> >> > shipping.
> > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > >> >> >> > that
> > > >> >> >> > was
> > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > >> >> >> > discover
> > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > >> >> >> > had
> > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > >> >> >> > this
> > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > >> >> >> > a
> > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > >> >> >> > But
> > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > >> >> >> > The
> > > >> >> >> > original owner of this machine definitely took care of it.
> > > >> >> >> > > >
> > > >> >> >> > > > Phil
> > > >> >> >> > > >
> > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > >
> > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > >> >> >> > > > > to
> > > >> >> >> > > > > a
> > > >> >> >> > convenient place for the battery. Upon power up it said
> > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > >> >> >> > > > > wrong
> > > >> >> >> > > > > with
> > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > >> >> >> > > > > POST
> > > >> >> >> > and Autoexec.
> > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > >> >> >> > > > > Now it boots cleanly.
> > > >> >> >> > > > > Has Lotus123 on the HD.
> > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > >> >> >> > > > > everything
> > > >> >> >> > > > > works.
> > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > >> >> >> > > > > RAM,
> > > >> >> >> > > > > a
> > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > >> >> >> > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > >> >> >> > > > > > X2
> > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > >> >> >> > > > > > make sure the rest of it is still good.
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > >> >> >> > <andrebakken@> wrote:
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > >> >> >> > > > > > > difference.
> > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > >> >> >> > directly
> > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > >> >> >> > > > > > > will
> > > >> >> >> > radiate more interference/noise out onto the mains.
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > There are two in there that are the same.
> > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > >> >> >> > > > > > > > I have them out already.
> > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > DC
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Good Find, DC
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > >> >> >> > and
> > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > >> >> >> > them
> > > >> >> >> > for you.
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Phil
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > >> >> >> > > > > > > > > > in
> > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > >> >> >> > replace both
> > > >> >> >> > > > > > > > > > of course.
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > DC
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > >> >> >> > > > > > > > > > > that
> > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > >> >> >> > > > > > > > > > > supply
> > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > >> >> >> > (unfortunately,
> > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > >> >> >> > > > > > > > > > > isolation!)
> > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > >> >> >> > > > > > > > > > > manuals
> > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > >> >> >> > > > > > > > > > > pointers
> > > >> >> >> > form
> > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > >> >> >> > > > > > > > > > > dead
> > > >> >> >> > diagnosis.
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > >> >> >> > > > > > > > > > > 1530
> > > >> >> >> > > > > > > > > > > will
> > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > >> >> >> > > > > > > > > > > DC
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > >
> > > >> >> >> > >
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > >> >> >> that
> > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > >> >> >> like
> > > >> >> >> a
> > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > >> >> >> and a
> > > >> >> >> stack? It's been so long since I messed with dos environment
> > > >> >> >> networking
> > > >> >> >> I forget.
> > > >> >> >>
> > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > >> >> >> equation,
> > > >> >> >> but I don' t have any references right now over a dos stack.
> > > >> >> >>
> > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > >> >> >> better,
> > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > >> >> >>
> > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > >> >> >> I'm
> > > >> >> >> asking for everything here. Objective is to have something that
> > > >> >> >> could
> > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > >> >> >> a
> > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > >> >> >>
> > > >> >> >> jim
> > > >> >> >> >
> > > >> >> >> > ,___
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > ------------------------------------
> > > >> >> >
> > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >>
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > ------------------------------------
> > > >> >
> > > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >
> > > >> >
> > > >> >
> > > >>
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> >
>
Date: Wed, 17 Oct 2012 10:50:30 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
I haven't looked at his stuff in a while, but have you ever played with Phil
Karn's NOS package? Commonly referred to by his callsign, KA9Q. It's a
TCP/IP package that lets you play with Internet type stuff. Really geeky,
but it does work.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "techtalklive@..." <doug@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Tuesday, October 16, 2012 2:25 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>I used to have all that stuff. Today I think I can run a dos program on
>the GRiD that talks to my trusty TotalCommander on another PC.
> As I might have mentioned in another post, if I could get
> another PC to appear as a mounted drive to the GRiD I'd be in
> real fat city. Then I'd have the machine wide open to the rest of the
> world.
> Any ideas there?
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> Good luck with the Backpack stuff.
>>
>> There's a book called "Hot Links", which was produced by the same people
>> that produced LapLink. In the back of the book is a disk with programs
>> that
>> will let you transfer files, either via null modem cable or LapLink
>> cable.
>> I doubt that the book is still in print, but it might be something to
>> look
>> for. If you get the book without the disk, let me know, and I'll get you
>> the software. I can't remember if it lets you map the host drive to the
>> client machine, but that would be cool, if it does that.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "techtalklive@..." <doug@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Monday, October 15, 2012 10:47 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> > Its a 1530... clock is... I dont know 20Mhz?
>> > Yes checking out Backpacks now. Just collected drivers from
>> > around the web for them and am checking on ebay for
>> > equipment. I suspect they will work.
>> >
>> > I thought I might take a look to see if there was parallel port
>> > software that would work like "laplink" to tether to another PC
>> > but would make a directory/drive on the the host PC appear as a drive
>> > to
>> > the 1530.
>> >
>> > That would be cool... and avoid purchasing old hardware.
>> >
>> >
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
>> >>
>> >> What's the bus clock of the 1520, for example? If it's 10MHz, it
>> >> *might*
>> >> make it, but it would be breathing hard. As for parallel drives, see
>> >> if
>> >> you
>> >> can find any of the Backpack stuff. I have a CD-ROM drive that works
>> >> off
>> >> the parallel port, but I haven't tried it on the GRiD yet.
>> >>
>> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> "She said it was either her or the ham radio. Over."
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "techtalklive@" <doug@>
>> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> Sent: Sunday, October 14, 2012 7:48 PM
>> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >> >
>> >> > Agreed! The Xircom Parallel port 10bT is available but has limited
>> >> > driver
>> >> > support.
>> >> > Other similar devices don't seem to be on the used market right not.
>> >> > I'm also considering a parallel based disk drive at this point.
>> >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
>> >> > didn't
>> >> > actually run the numbers.
>> >> > DC
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> >> > wrote:
>> >> >>
>> >> >> I don't think I'd even bother with the serial port. You might get
>> >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
>> >> >> 16550AFN
>> >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART,
>> >> >> you
>> >> >> have
>> >> >> to slow it down with CTS/RTS handshaking. I think the standard
>> >> >> parallel
>> >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
>> >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD,
>> >> >> but
>> >> >> even
>> >> >> if you could directly tie in to the ISA bus, it would be tough.
>> >> >>
>> >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> >> "She said it was either her or the ham radio. Over."
>> >> >>
>> >> >>
>> >> >> ----- Original Message -----
>> >> >> From: "Androgenoide" <androgenoide@>
>> >> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> >> Sent: Friday, October 12, 2012 3:37 PM
>> >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> >>
>> >> >>
>> >> >> > The only real obstacle to DOS networking with the Grid is finding
>> >> >> > an
>> >> >> > Ethernet adapter that will work through either the serial or
>> >> >> > parallel
>> >> >> > ports. I used the Xircom on the parallel port because I had one
>> >> >> > at
>> >> >> > the
>> >> >> > time. I've got a serial device server now that would probably
>> >> >> > work
>> >> >> > too
>> >> >> > but I've got too much going on at the moment to dig out a Grid
>> >> >> > just
>> >> >> > to
>> >> >> > see
>> >> >> > what would be required. Either of those solutions would be
>> >> >> > limited
>> >> >> > by
>> >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
>> >> >> > speeds
>> >> >> > are out of the question!
>> >> >> > Another thought... The guy who put together the Techworm boot
>> >> >> > disk
>> >> >> > also
>> >> >> > had one called Networm, a single floppy that could do a dialup
>> >> >> > internet
>> >> >> > connection... (if you still have access to a dialup service... if
>> >> >> > not,
>> >> >> > Budget Dial Up has a prepaid service that allows you to buy just
>> >> >> > a
>> >> >> > few
>> >> >> > hours at a time).
>> >> >> >
>> >> >> > Generally speaking, if an old machine has either a serial or
>> >> >> > parallel
>> >> >> > port
>> >> >> > and you can get it to boot into DOS, there is always a way to
>> >> >> > transfer
>> >> >> > files to another machine. Even if it has no floppy you can use
>> >> >> > another
>> >> >> > DOS machine running Laplink. If it does have a floppy there are
>> >> >> > a
>> >> >> > lot
>> >> >> > of
>> >> >> > file transfer programs out there, from Kermit to the original
>> >> >> > version
>> >> >> > of
>> >> >> > Procomm that will fit on a single floppy.
>> >> >> >
>> >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
>> >> >> > full
>> >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
>> >> >> > tricky
>> >> >> > and
>> >> >> > would require some hardware tweaks even to make a slow machine...
>> >> >> > kind
>> >> >> > of
>> >> >> > an extreme project. I've heard of a Linux distro that will fit
>> >> >> > on
>> >> >> > a
>> >> >> > single floppy and run on systems with limited resources
>> >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even
>> >> >> > that
>> >> >> > one
>> >> >> > seems to want 4MB of RAM.
>> >> >> >
>> >> >> > There are plenty of people on the web who have too much time on
>> >> >> > their
>> >> >> > hands and are still playing with machines even older than the
>> >> >> > Grid...
>> >> >> > You
>> >> >> > can still buy new after-market accessories for Commodores, for
>> >> >> > example,
>> >> >> > so
>> >> >> > don't assume that there are no new solutions to old problems.
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
>> >> >> >>
>> >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> >> >> >
>> >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
>> >> >> >> > port
>> >> >> >> > to
>> >> >> >> > a NIC... although I've been wondering lately if it might not
>> >> >> >> > have
>> >> >> >> > made
>> >> >> >> > equally good sense to use a device server on the serial
>> >> >> >> > port...?
>> >> >> >> > And,
>> >> >> >> > of course, the Arachne browser... not many choices for a DOS
>> >> >> >> > browser
>> >> >> >> > are there? I used it to check my Yahoo web mail and I'll have
>> >> >> >> > to
>> >> >> >> > say
>> >> >> >> > that it gave a whole new dimension of meaning to the word
>> >> >> >> > "slow."
>> >> >> >> > Go
>> >> >> >> > ahead, make a pot of tea while it's loading that page, it will
>> >> >> >> > be
>> >> >> >> > a
>> >> >> >> > while.
>> >> >> >> >
>> >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web
>> >> >> >> > page
>> >> >> >> > last
>> >> >> >> > week of a guy who was competing with a friend to see who could
>> >> >> >> > force
>> >> >> >> > Windows XP to run with the least resources. It won't install
>> >> >> >> > unless
>> >> >> >> > it
>> >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
>> >> >> >> > installed
>> >> >> >> > you can remove RAM and underclock the machine... He said he
>> >> >> >> > got
>> >> >> >> > one
>> >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took
>> >> >> >> > a
>> >> >> >> > half
>> >> >> >> > hour to boot.
>> >> >> >> >
>> >> >> >> > I scored an HP 95LX a while back and someday, when I have
>> >> >> >> > nothing
>> >> >> >> > else
>> >> >> >> > to do (Hah!) it might be interesting to see if I can get
>> >> >> >> > online
>> >> >> >> > with
>> >> >> >> > a
>> >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
>> >> >> >> > OS/browser
>> >> >> >> > could be ported to a 95LX?)... or maybe not...
>> >> >> >> >
>> >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@> wrote:
>> >> >> >> > >
>> >> >> >> > > Like the hack job? :O
>> >> >> >> > >
>> >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
>> >> >> >> > > screes?
>> >> >> >> > > Should I take the kbd apart and clean it (will that likely
>> >> >> >> > > fix it?) or look for a replacement?
>> >> >> >> > >
>> >> >> >> > > So what can I do with this thing if I put more mem in it?
>> >> >> >> > > Its all accessed funky through expaned mem methods, isn't
>> >> >> >> > > it?
>> >> >> >> > > I have a coprocessor I could put in this but not sure of
>> >> >> >> > > the point there.
>> >> >> >> > >
>> >> >> >> > > I think I might like to accomplish getting it on the web.
>> >> >> >> > > I'd need the LAN hardware I guess.
>> >> >> >> > > Any other ideas?
>> >> >> >> > >
>> >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
>> >> >> >> > > it that mate inside the cavity. But one of the two spring
>> >> >> >> > > contacts
>> >> >> >> > > inside is "rubberized", so only the one contact hits metal
>> >> >> >> > > to
>> >> >> >> > > metal.
>> >> >> >> > > So the P.S. only works using the cord to go from the P.S.
>> >> >> >> > > into
>> >> >> >> > > the
>> >> >> >> > > radial DC jack. Strange?
>> >> >> >> > >
>> >> >> >> > > DC
>> >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> >> >> > <Jeriddian@>
>> >> >> >> > wrote:
>> >> >> >> > > >
>> >> >> >> > > > Great job, Doug!
>> >> >> >> > > >
>> >> >> >> > > > Isn't it nice when you manage to salvage one of these
>> >> >> >> > > > beautiful
>> >> >> >> > machines? And yep, that's the way it works.
>> >> >> >> > > >
>> >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
>> >> >> >> > > > registers
>> >> >> >> > are again active. It's just that they're filled with nonsense,
>> >> >> >> > so
>> >> >> >> > the
>> >> >> >> > computer tells you the clock had stopped (which it did), and
>> >> >> >> > simply
>> >> >> >> > prompts you to reset the time. Once you do that and reboot,
>> >> >> >> > everything's hunky-dory.
>> >> >> >> > > >
>> >> >> >> > > > You can probably find some more 256K sticks somewhere and
>> >> >> >> > > > upgrade
>> >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
>> >> >> >> > Great
>> >> >> >> > to
>> >> >> >> > hear the HDD is good too.
>> >> >> >> > > >
>> >> >> >> > > > I recently got a great deal. There was a 1520 on sale on
>> >> >> >> > > > ebay
>> >> >> >> > > > that
>> >> >> >> > I looked at, however it was strange. It was definitely branded
>> >> >> >> > a
>> >> >> >> > 1520,
>> >> >> >> > and advertised that way, but the flip up screen said it was a
>> >> >> >> > 386
>> >> >> >> > machine. I decided to get it, and it was only about $90 with
>> >> >> >> > shipping.
>> >> >> >> > When I got the machine, I was very excited when it began to
>> >> >> >> > post,
>> >> >> >> > because I got a full 8MB of RAM! It of course displayed the
>> >> >> >> > configuration error 02 indicating the CMOS battery was dead.
>> >> >> >> > So I
>> >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
>> >> >> >> > that
>> >> >> >> > was
>> >> >> >> > no big deal. I decided to replace the DS1287A as I had a
>> >> >> >> > spare.
>> >> >> >> > Imagine my surprise and joy when I took the keyboard off to
>> >> >> >> > discover
>> >> >> >> > that not only was this really a 386 machine (a 1530), but it
>> >> >> >> > also
>> >> >> >> > had
>> >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A
>> >> >> >> > and
>> >> >> >> > this
>> >> >> >> > solved the configuration error just fine. But alas, I didn't
>> >> >> >> > get
>> >> >> >> > a
>> >> >> >> > triple crown winner here. The Conner drive was definitely
>> >> >> >> > dead.
>> >> >> >> > But
>> >> >> >> > heck, getting another HDD is easy compared to the other
>> >> >> >> > benefits!
>> >> >> >> > The
>> >> >> >> > original owner of this machine definitely took care of it.
>> >> >> >> > > >
>> >> >> >> > > > Phil
>> >> >> >> > > >
>> >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > >
>> >> >> >> > > > > It runs! Hard Disk is GOOD.
>> >> >> >> > > > > I did a DS1287 hack to the machine today and ran the
>> >> >> >> > > > > wires
>> >> >> >> > > > > to
>> >> >> >> > > > > a
>> >> >> >> > convenient place for the battery. Upon power up it said
>> >> >> >> > > > > that the RTC was stopped, and it needed setting.
>> >> >> >> > > > > The "stopped" message threw me, I thought something was
>> >> >> >> > > > > wrong
>> >> >> >> > > > > with
>> >> >> >> > > > > the chip. It took an F1 to continue and went right
>> >> >> >> > > > > through
>> >> >> >> > > > > POST
>> >> >> >> > and Autoexec.
>> >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the
>> >> >> >> > > > > RTC.
>> >> >> >> > > > > Now it boots cleanly.
>> >> >> >> > > > > Has Lotus123 on the HD.
>> >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
>> >> >> >> > > > > The only remaining issue is that a few keys on the
>> >> >> >> > > > > keyboard
>> >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
>> >> >> >> > > > > everything
>> >> >> >> > > > > works.
>> >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with
>> >> >> >> > > > > 1MB
>> >> >> >> > > > > RAM,
>> >> >> >> > > > > a
>> >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>> >> >> >> > > > >
>> >> >> >> > > > >
>> >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > >
>> >> >> >> > > > > > Thanks so much that was great info. I had no idea on
>> >> >> >> > > > > > the
>> >> >> >> > > > > > X2
>> >> >> >> > > > > > being a rating. May have to try it without them just
>> >> >> >> > > > > > to
>> >> >> >> > > > > > make sure the rest of it is still good.
>> >> >> >> > > > > >
>> >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
>> >> >> >> > <andrebakken@> wrote:
>> >> >> >> > > > > > >
>> >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
>> >> >> >> > > > > > > difference.
>> >> >> >> > The X2 also signifies they're an enhanced type meant to go
>> >> >> >> > directly
>> >> >> >> > across the mains. Be sure to get X2 rated replacements.
>> >> >> >> > > > > > > The PSU will work without those cap's in place, but
>> >> >> >> > > > > > > will
>> >> >> >> > radiate more interference/noise out onto the mains.
>> >> >> >> > > > > > >
>> >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > > There are two in there that are the same.
>> >> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
>> >> >> >> > > > > > > > The bottom is clear so you can see the radial
>> >> >> >> > > > > > > > shape.
>> >> >> >> > > > > > > > I have them out already.
>> >> >> >> > > > > > > > Thanks for the tip on the 1287A
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > > DC
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> >> >> > <Jeriddian@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > Good Find, DC
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > I guess they got burnt to the point where you
>> >> >> >> > > > > > > > > can't
>> >> >> >> > identify the capcity amount. Could you give me the output
>> >> >> >> > voltage
>> >> >> >> > and
>> >> >> >> > amperage? I'll look through my units and see if I can identify
>> >> >> >> > them
>> >> >> >> > for you.
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > Phil
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > > > I posted pictures of what looks like a failed
>> >> >> >> > > > > > > > > > cap
>> >> >> >> > > > > > > > > > in
>> >> >> >> > the ext p.s. unit. A stinky melt down!
>> >> >> >> > > > > > > > > > I'm supposing I can replace these.
>> >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
>> >> >> >> > > > > > > > > > There appears to be two of the same caps,
>> >> >> >> > > > > > > > > > would
>> >> >> >> > replace both
>> >> >> >> > > > > > > > > > of course.
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > > > DC
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > > > I am considering tackling the repair of a
>> >> >> >> > > > > > > > > > > 1530
>> >> >> >> > > > > > > > > > > that
>> >> >> >> > > > > > > > > > > does not respond to the power switch. The
>> >> >> >> > > > > > > > > > > power
>> >> >> >> > > > > > > > > > > supply
>> >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
>> >> >> >> > (unfortunately,
>> >> >> >> > > > > > > > > > > that would have been an easy problem
>> >> >> >> > > > > > > > > > > isolation!)
>> >> >> >> > > > > > > > > > > So its something internal. I have the
>> >> >> >> > > > > > > > > > > service
>> >> >> >> > > > > > > > > > > manuals
>> >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
>> >> >> >> > > > > > > > > > > pointers
>> >> >> >> > form
>> >> >> >> > > > > > > > > > > folks who have already performed cold stone
>> >> >> >> > > > > > > > > > > dead
>> >> >> >> > diagnosis.
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > > > If I don't dive into this FYI this very
>> >> >> >> > > > > > > > > > > clean
>> >> >> >> > > > > > > > > > > 1530
>> >> >> >> > > > > > > > > > > will
>> >> >> >> > > > > > > > > > > be available for parts/repair!
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > > > Thanks in advance,
>> >> >> >> > > > > > > > > > > DC
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > >
>> >> >> >> > > > > >
>> >> >> >> > > > >
>> >> >> >> > > >
>> >> >> >> > >
>> >> >> >> >
>> >> >> >>
>> >> >> >> Since we are on the topic of TCP does anyone have a formula
>> >> >> >> stashed
>> >> >> >> that
>> >> >> >> can be easily had to run say serial (probably ppp) from
>> >> >> >> something
>> >> >> >> like
>> >> >> >> a
>> >> >> >> small system like the raspberry pi serially to a system with dos
>> >> >> >> and a
>> >> >> >> stack? It's been so long since I messed with dos environment
>> >> >> >> networking
>> >> >> >> I forget.
>> >> >> >>
>> >> >> >> I think windows of some sort had trumpet to handle part of the
>> >> >> >> equation,
>> >> >> >> but I don' t have any references right now over a dos stack.
>> >> >> >>
>> >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
>> >> >> >> better,
>> >> >> >> but I don't know if the hardware here would be up to those os's.
>> >> >> >>
>> >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
>> >> >> >> I'm
>> >> >> >> asking for everything here. Objective is to have something that
>> >> >> >> could
>> >> >> >> suck off or load a disk image with a floppy boot. I suspect it
>> >> >> >> was
>> >> >> >> a
>> >> >> >> difficult thing to get going in the day, though, and even wors
>> >> >> >> now.
>> >> >> >>
>> >> >> >> jim
>> >> >> >> >
>> >> >> >> > ,___
>> >> >> >> >
>> >> >> >>
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > ------------------------------------
>> >> >> >
>> >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------
>> >> >
>> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >
>> >> >
>> >> >
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Wed, 17 Oct 2012 10:51:04 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Oops...forgot to give you the link:
http://www.ka9q.net/code/ka9qnos/
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "techtalklive@..." <doug@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Tuesday, October 16, 2012 2:25 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>I used to have all that stuff. Today I think I can run a dos program on
>the GRiD that talks to my trusty TotalCommander on another PC.
> As I might have mentioned in another post, if I could get
> another PC to appear as a mounted drive to the GRiD I'd be in
> real fat city. Then I'd have the machine wide open to the rest of the
> world.
> Any ideas there?
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> Good luck with the Backpack stuff.
>>
>> There's a book called "Hot Links", which was produced by the same people
>> that produced LapLink. In the back of the book is a disk with programs
>> that
>> will let you transfer files, either via null modem cable or LapLink
>> cable.
>> I doubt that the book is still in print, but it might be something to
>> look
>> for. If you get the book without the disk, let me know, and I'll get you
>> the software. I can't remember if it lets you map the host drive to the
>> client machine, but that would be cool, if it does that.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "techtalklive@..." <doug@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Monday, October 15, 2012 10:47 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> > Its a 1530... clock is... I dont know 20Mhz?
>> > Yes checking out Backpacks now. Just collected drivers from
>> > around the web for them and am checking on ebay for
>> > equipment. I suspect they will work.
>> >
>> > I thought I might take a look to see if there was parallel port
>> > software that would work like "laplink" to tether to another PC
>> > but would make a directory/drive on the the host PC appear as a drive
>> > to
>> > the 1530.
>> >
>> > That would be cool... and avoid purchasing old hardware.
>> >
>> >
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
>> >>
>> >> What's the bus clock of the 1520, for example? If it's 10MHz, it
>> >> *might*
>> >> make it, but it would be breathing hard. As for parallel drives, see
>> >> if
>> >> you
>> >> can find any of the Backpack stuff. I have a CD-ROM drive that works
>> >> off
>> >> the parallel port, but I haven't tried it on the GRiD yet.
>> >>
>> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> "She said it was either her or the ham radio. Over."
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "techtalklive@" <doug@>
>> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> Sent: Sunday, October 14, 2012 7:48 PM
>> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >> >
>> >> > Agreed! The Xircom Parallel port 10bT is available but has limited
>> >> > driver
>> >> > support.
>> >> > Other similar devices don't seem to be on the used market right not.
>> >> > I'm also considering a parallel based disk drive at this point.
>> >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
>> >> > didn't
>> >> > actually run the numbers.
>> >> > DC
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> >> > wrote:
>> >> >>
>> >> >> I don't think I'd even bother with the serial port. You might get
>> >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
>> >> >> 16550AFN
>> >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART,
>> >> >> you
>> >> >> have
>> >> >> to slow it down with CTS/RTS handshaking. I think the standard
>> >> >> parallel
>> >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
>> >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD,
>> >> >> but
>> >> >> even
>> >> >> if you could directly tie in to the ISA bus, it would be tough.
>> >> >>
>> >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> >> "She said it was either her or the ham radio. Over."
>> >> >>
>> >> >>
>> >> >> ----- Original Message -----
>> >> >> From: "Androgenoide" <androgenoide@>
>> >> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> >> Sent: Friday, October 12, 2012 3:37 PM
>> >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> >>
>> >> >>
>> >> >> > The only real obstacle to DOS networking with the Grid is finding
>> >> >> > an
>> >> >> > Ethernet adapter that will work through either the serial or
>> >> >> > parallel
>> >> >> > ports. I used the Xircom on the parallel port because I had one
>> >> >> > at
>> >> >> > the
>> >> >> > time. I've got a serial device server now that would probably
>> >> >> > work
>> >> >> > too
>> >> >> > but I've got too much going on at the moment to dig out a Grid
>> >> >> > just
>> >> >> > to
>> >> >> > see
>> >> >> > what would be required. Either of those solutions would be
>> >> >> > limited
>> >> >> > by
>> >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
>> >> >> > speeds
>> >> >> > are out of the question!
>> >> >> > Another thought... The guy who put together the Techworm boot
>> >> >> > disk
>> >> >> > also
>> >> >> > had one called Networm, a single floppy that could do a dialup
>> >> >> > internet
>> >> >> > connection... (if you still have access to a dialup service... if
>> >> >> > not,
>> >> >> > Budget Dial Up has a prepaid service that allows you to buy just
>> >> >> > a
>> >> >> > few
>> >> >> > hours at a time).
>> >> >> >
>> >> >> > Generally speaking, if an old machine has either a serial or
>> >> >> > parallel
>> >> >> > port
>> >> >> > and you can get it to boot into DOS, there is always a way to
>> >> >> > transfer
>> >> >> > files to another machine. Even if it has no floppy you can use
>> >> >> > another
>> >> >> > DOS machine running Laplink. If it does have a floppy there are
>> >> >> > a
>> >> >> > lot
>> >> >> > of
>> >> >> > file transfer programs out there, from Kermit to the original
>> >> >> > version
>> >> >> > of
>> >> >> > Procomm that will fit on a single floppy.
>> >> >> >
>> >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
>> >> >> > full
>> >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
>> >> >> > tricky
>> >> >> > and
>> >> >> > would require some hardware tweaks even to make a slow machine...
>> >> >> > kind
>> >> >> > of
>> >> >> > an extreme project. I've heard of a Linux distro that will fit
>> >> >> > on
>> >> >> > a
>> >> >> > single floppy and run on systems with limited resources
>> >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even
>> >> >> > that
>> >> >> > one
>> >> >> > seems to want 4MB of RAM.
>> >> >> >
>> >> >> > There are plenty of people on the web who have too much time on
>> >> >> > their
>> >> >> > hands and are still playing with machines even older than the
>> >> >> > Grid...
>> >> >> > You
>> >> >> > can still buy new after-market accessories for Commodores, for
>> >> >> > example,
>> >> >> > so
>> >> >> > don't assume that there are no new solutions to old problems.
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
>> >> >> >>
>> >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> >> >> >
>> >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
>> >> >> >> > port
>> >> >> >> > to
>> >> >> >> > a NIC... although I've been wondering lately if it might not
>> >> >> >> > have
>> >> >> >> > made
>> >> >> >> > equally good sense to use a device server on the serial
>> >> >> >> > port...?
>> >> >> >> > And,
>> >> >> >> > of course, the Arachne browser... not many choices for a DOS
>> >> >> >> > browser
>> >> >> >> > are there? I used it to check my Yahoo web mail and I'll have
>> >> >> >> > to
>> >> >> >> > say
>> >> >> >> > that it gave a whole new dimension of meaning to the word
>> >> >> >> > "slow."
>> >> >> >> > Go
>> >> >> >> > ahead, make a pot of tea while it's loading that page, it will
>> >> >> >> > be
>> >> >> >> > a
>> >> >> >> > while.
>> >> >> >> >
>> >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web
>> >> >> >> > page
>> >> >> >> > last
>> >> >> >> > week of a guy who was competing with a friend to see who could
>> >> >> >> > force
>> >> >> >> > Windows XP to run with the least resources. It won't install
>> >> >> >> > unless
>> >> >> >> > it
>> >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
>> >> >> >> > installed
>> >> >> >> > you can remove RAM and underclock the machine... He said he
>> >> >> >> > got
>> >> >> >> > one
>> >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took
>> >> >> >> > a
>> >> >> >> > half
>> >> >> >> > hour to boot.
>> >> >> >> >
>> >> >> >> > I scored an HP 95LX a while back and someday, when I have
>> >> >> >> > nothing
>> >> >> >> > else
>> >> >> >> > to do (Hah!) it might be interesting to see if I can get
>> >> >> >> > online
>> >> >> >> > with
>> >> >> >> > a
>> >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
>> >> >> >> > OS/browser
>> >> >> >> > could be ported to a 95LX?)... or maybe not...
>> >> >> >> >
>> >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@> wrote:
>> >> >> >> > >
>> >> >> >> > > Like the hack job? :O
>> >> >> >> > >
>> >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
>> >> >> >> > > screes?
>> >> >> >> > > Should I take the kbd apart and clean it (will that likely
>> >> >> >> > > fix it?) or look for a replacement?
>> >> >> >> > >
>> >> >> >> > > So what can I do with this thing if I put more mem in it?
>> >> >> >> > > Its all accessed funky through expaned mem methods, isn't
>> >> >> >> > > it?
>> >> >> >> > > I have a coprocessor I could put in this but not sure of
>> >> >> >> > > the point there.
>> >> >> >> > >
>> >> >> >> > > I think I might like to accomplish getting it on the web.
>> >> >> >> > > I'd need the LAN hardware I guess.
>> >> >> >> > > Any other ideas?
>> >> >> >> > >
>> >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
>> >> >> >> > > it that mate inside the cavity. But one of the two spring
>> >> >> >> > > contacts
>> >> >> >> > > inside is "rubberized", so only the one contact hits metal
>> >> >> >> > > to
>> >> >> >> > > metal.
>> >> >> >> > > So the P.S. only works using the cord to go from the P.S.
>> >> >> >> > > into
>> >> >> >> > > the
>> >> >> >> > > radial DC jack. Strange?
>> >> >> >> > >
>> >> >> >> > > DC
>> >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> >> >> > <Jeriddian@>
>> >> >> >> > wrote:
>> >> >> >> > > >
>> >> >> >> > > > Great job, Doug!
>> >> >> >> > > >
>> >> >> >> > > > Isn't it nice when you manage to salvage one of these
>> >> >> >> > > > beautiful
>> >> >> >> > machines? And yep, that's the way it works.
>> >> >> >> > > >
>> >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
>> >> >> >> > > > registers
>> >> >> >> > are again active. It's just that they're filled with nonsense,
>> >> >> >> > so
>> >> >> >> > the
>> >> >> >> > computer tells you the clock had stopped (which it did), and
>> >> >> >> > simply
>> >> >> >> > prompts you to reset the time. Once you do that and reboot,
>> >> >> >> > everything's hunky-dory.
>> >> >> >> > > >
>> >> >> >> > > > You can probably find some more 256K sticks somewhere and
>> >> >> >> > > > upgrade
>> >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
>> >> >> >> > Great
>> >> >> >> > to
>> >> >> >> > hear the HDD is good too.
>> >> >> >> > > >
>> >> >> >> > > > I recently got a great deal. There was a 1520 on sale on
>> >> >> >> > > > ebay
>> >> >> >> > > > that
>> >> >> >> > I looked at, however it was strange. It was definitely branded
>> >> >> >> > a
>> >> >> >> > 1520,
>> >> >> >> > and advertised that way, but the flip up screen said it was a
>> >> >> >> > 386
>> >> >> >> > machine. I decided to get it, and it was only about $90 with
>> >> >> >> > shipping.
>> >> >> >> > When I got the machine, I was very excited when it began to
>> >> >> >> > post,
>> >> >> >> > because I got a full 8MB of RAM! It of course displayed the
>> >> >> >> > configuration error 02 indicating the CMOS battery was dead.
>> >> >> >> > So I
>> >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
>> >> >> >> > that
>> >> >> >> > was
>> >> >> >> > no big deal. I decided to replace the DS1287A as I had a
>> >> >> >> > spare.
>> >> >> >> > Imagine my surprise and joy when I took the keyboard off to
>> >> >> >> > discover
>> >> >> >> > that not only was this really a 386 machine (a 1530), but it
>> >> >> >> > also
>> >> >> >> > had
>> >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A
>> >> >> >> > and
>> >> >> >> > this
>> >> >> >> > solved the configuration error just fine. But alas, I didn't
>> >> >> >> > get
>> >> >> >> > a
>> >> >> >> > triple crown winner here. The Conner drive was definitely
>> >> >> >> > dead.
>> >> >> >> > But
>> >> >> >> > heck, getting another HDD is easy compared to the other
>> >> >> >> > benefits!
>> >> >> >> > The
>> >> >> >> > original owner of this machine definitely took care of it.
>> >> >> >> > > >
>> >> >> >> > > > Phil
>> >> >> >> > > >
>> >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > >
>> >> >> >> > > > > It runs! Hard Disk is GOOD.
>> >> >> >> > > > > I did a DS1287 hack to the machine today and ran the
>> >> >> >> > > > > wires
>> >> >> >> > > > > to
>> >> >> >> > > > > a
>> >> >> >> > convenient place for the battery. Upon power up it said
>> >> >> >> > > > > that the RTC was stopped, and it needed setting.
>> >> >> >> > > > > The "stopped" message threw me, I thought something was
>> >> >> >> > > > > wrong
>> >> >> >> > > > > with
>> >> >> >> > > > > the chip. It took an F1 to continue and went right
>> >> >> >> > > > > through
>> >> >> >> > > > > POST
>> >> >> >> > and Autoexec.
>> >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the
>> >> >> >> > > > > RTC.
>> >> >> >> > > > > Now it boots cleanly.
>> >> >> >> > > > > Has Lotus123 on the HD.
>> >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
>> >> >> >> > > > > The only remaining issue is that a few keys on the
>> >> >> >> > > > > keyboard
>> >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
>> >> >> >> > > > > everything
>> >> >> >> > > > > works.
>> >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with
>> >> >> >> > > > > 1MB
>> >> >> >> > > > > RAM,
>> >> >> >> > > > > a
>> >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
>> >> >> >> > > > >
>> >> >> >> > > > >
>> >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > >
>> >> >> >> > > > > > Thanks so much that was great info. I had no idea on
>> >> >> >> > > > > > the
>> >> >> >> > > > > > X2
>> >> >> >> > > > > > being a rating. May have to try it without them just
>> >> >> >> > > > > > to
>> >> >> >> > > > > > make sure the rest of it is still good.
>> >> >> >> > > > > >
>> >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
>> >> >> >> > <andrebakken@> wrote:
>> >> >> >> > > > > > >
>> >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
>> >> >> >> > > > > > > difference.
>> >> >> >> > The X2 also signifies they're an enhanced type meant to go
>> >> >> >> > directly
>> >> >> >> > across the mains. Be sure to get X2 rated replacements.
>> >> >> >> > > > > > > The PSU will work without those cap's in place, but
>> >> >> >> > > > > > > will
>> >> >> >> > radiate more interference/noise out onto the mains.
>> >> >> >> > > > > > >
>> >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > > There are two in there that are the same.
>> >> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
>> >> >> >> > > > > > > > The bottom is clear so you can see the radial
>> >> >> >> > > > > > > > shape.
>> >> >> >> > > > > > > > I have them out already.
>> >> >> >> > > > > > > > Thanks for the tip on the 1287A
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > > DC
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> >> >> > <Jeriddian@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > Good Find, DC
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > I guess they got burnt to the point where you
>> >> >> >> > > > > > > > > can't
>> >> >> >> > identify the capcity amount. Could you give me the output
>> >> >> >> > voltage
>> >> >> >> > and
>> >> >> >> > amperage? I'll look through my units and see if I can identify
>> >> >> >> > them
>> >> >> >> > for you.
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > Phil
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > > > I posted pictures of what looks like a failed
>> >> >> >> > > > > > > > > > cap
>> >> >> >> > > > > > > > > > in
>> >> >> >> > the ext p.s. unit. A stinky melt down!
>> >> >> >> > > > > > > > > > I'm supposing I can replace these.
>> >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
>> >> >> >> > > > > > > > > > There appears to be two of the same caps,
>> >> >> >> > > > > > > > > > would
>> >> >> >> > replace both
>> >> >> >> > > > > > > > > > of course.
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > > > DC
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
>> >> >> >> > <doug@>
>> >> >> >> > wrote:
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > > > I am considering tackling the repair of a
>> >> >> >> > > > > > > > > > > 1530
>> >> >> >> > > > > > > > > > > that
>> >> >> >> > > > > > > > > > > does not respond to the power switch. The
>> >> >> >> > > > > > > > > > > power
>> >> >> >> > > > > > > > > > > supply
>> >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
>> >> >> >> > (unfortunately,
>> >> >> >> > > > > > > > > > > that would have been an easy problem
>> >> >> >> > > > > > > > > > > isolation!)
>> >> >> >> > > > > > > > > > > So its something internal. I have the
>> >> >> >> > > > > > > > > > > service
>> >> >> >> > > > > > > > > > > manuals
>> >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
>> >> >> >> > > > > > > > > > > pointers
>> >> >> >> > form
>> >> >> >> > > > > > > > > > > folks who have already performed cold stone
>> >> >> >> > > > > > > > > > > dead
>> >> >> >> > diagnosis.
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > > > If I don't dive into this FYI this very
>> >> >> >> > > > > > > > > > > clean
>> >> >> >> > > > > > > > > > > 1530
>> >> >> >> > > > > > > > > > > will
>> >> >> >> > > > > > > > > > > be available for parts/repair!
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > > > Thanks in advance,
>> >> >> >> > > > > > > > > > > DC
>> >> >> >> > > > > > > > > > >
>> >> >> >> > > > > > > > > >
>> >> >> >> > > > > > > > >
>> >> >> >> > > > > > > >
>> >> >> >> > > > > > >
>> >> >> >> > > > > >
>> >> >> >> > > > >
>> >> >> >> > > >
>> >> >> >> > >
>> >> >> >> >
>> >> >> >>
>> >> >> >> Since we are on the topic of TCP does anyone have a formula
>> >> >> >> stashed
>> >> >> >> that
>> >> >> >> can be easily had to run say serial (probably ppp) from
>> >> >> >> something
>> >> >> >> like
>> >> >> >> a
>> >> >> >> small system like the raspberry pi serially to a system with dos
>> >> >> >> and a
>> >> >> >> stack? It's been so long since I messed with dos environment
>> >> >> >> networking
>> >> >> >> I forget.
>> >> >> >>
>> >> >> >> I think windows of some sort had trumpet to handle part of the
>> >> >> >> equation,
>> >> >> >> but I don' t have any references right now over a dos stack.
>> >> >> >>
>> >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
>> >> >> >> better,
>> >> >> >> but I don't know if the hardware here would be up to those os's.
>> >> >> >>
>> >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
>> >> >> >> I'm
>> >> >> >> asking for everything here. Objective is to have something that
>> >> >> >> could
>> >> >> >> suck off or load a disk image with a floppy boot. I suspect it
>> >> >> >> was
>> >> >> >> a
>> >> >> >> difficult thing to get going in the day, though, and even wors
>> >> >> >> now.
>> >> >> >>
>> >> >> >> jim
>> >> >> >> >
>> >> >> >> > ,___
>> >> >> >> >
>> >> >> >>
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > ------------------------------------
>> >> >> >
>> >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------
>> >> >
>> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >
>> >> >
>> >> >
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Wed, 17 Oct 2012 12:52:18 -0400
From: Shawnerz
Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=utf-8
IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM. Once I soldered the pins on, the module height would not allow the cover to go on.
Your results may vary,
-Shawn
-------- Original message --------
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
From: "techtalklive@ymail.com" <doug@crawfordltd.com>
To: RuGRiD-Laptop@yahoogroups.com
CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Well that sounds promising. The only thing that would
top that would be a native SCSI attached to the bus connectors
in the accessory port. A ParPort one would do in the meantime.
Thanks!
I'm thinking of moding some SIMM chips to go in the SIPP sockets.
Anyone know the mem speed? Hate to take the thing apart right
now to find out.
Thanks!
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
>
> The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > As I might have mentioned in another post, if I could get
> > another PC to appear as a mounted drive to the GRiD I'd be in
> > real fat city. Then I'd have the machine wide open to the rest of the world.
> > Any ideas there?
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >
> > > Good luck with the Backpack stuff.
> > >
> > > There's a book called "Hot Links", which was produced by the same people
> > > that produced LapLink. In the back of the book is a disk with programs that
> > > will let you transfer files, either via null modem cable or LapLink cable.
> > > I doubt that the book is still in print, but it might be something to look
> > > for. If you get the book without the disk, let me know, and I'll get you
> > > the software. I can't remember if it lets you map the host drive to the
> > > client machine, but that would be cool, if it does that.
> > >
> > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > "She said it was either her or the ham radio. Over."
> > >
> > >
> > > ----- Original Message -----
> > > From: "techtalklive@" <doug@>
> > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > Sent: Monday, October 15, 2012 10:47 PM
> > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >
> > >
> > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > Yes checking out Backpacks now. Just collected drivers from
> > > > around the web for them and am checking on ebay for
> > > > equipment. I suspect they will work.
> > > >
> > > > I thought I might take a look to see if there was parallel port
> > > > software that would work like "laplink" to tether to another PC
> > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > the 1530.
> > > >
> > > > That would be cool... and avoid purchasing old hardware.
> > > >
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >>
> > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > >> you
> > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > >>
> > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> "She said it was either her or the ham radio. Over."
> > > >>
> > > >>
> > > >> ----- Original Message -----
> > > >> From: "techtalklive@" <doug@>
> > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >>
> > > >>
> > > >> >
> > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > >> > driver
> > > >> > support.
> > > >> > Other similar devices don't seem to be on the used market right not.
> > > >> > I'm also considering a parallel based disk drive at this point.
> > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > >> > didn't
> > > >> > actually run the numbers.
> > > >> > DC
> > > >> >
> > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >> >>
> > > >> >> I don't think I'd even bother with the serial port. You might get
> > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > >> >> 16550AFN
> > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > >> >> have
> > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > >> >> parallel
> > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > >> >> even
> > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > >> >>
> > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> >> "She said it was either her or the ham radio. Over."
> > > >> >>
> > > >> >>
> > > >> >> ----- Original Message -----
> > > >> >> From: "Androgenoide" <androgenoide@>
> > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >> >>
> > > >> >>
> > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > >> >> > Ethernet adapter that will work through either the serial or
> > > >> >> > parallel
> > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > >> >> > the
> > > >> >> > time. I've got a serial device server now that would probably work
> > > >> >> > too
> > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > >> >> > to
> > > >> >> > see
> > > >> >> > what would be required. Either of those solutions would be limited
> > > >> >> > by
> > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > >> >> > speeds
> > > >> >> > are out of the question!
> > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > >> >> > also
> > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > >> >> > internet
> > > >> >> > connection... (if you still have access to a dialup service... if
> > > >> >> > not,
> > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > >> >> > few
> > > >> >> > hours at a time).
> > > >> >> >
> > > >> >> > Generally speaking, if an old machine has either a serial or
> > > >> >> > parallel
> > > >> >> > port
> > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > >> >> > transfer
> > > >> >> > files to another machine. Even if it has no floppy you can use
> > > >> >> > another
> > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > >> >> > lot
> > > >> >> > of
> > > >> >> > file transfer programs out there, from Kermit to the original
> > > >> >> > version
> > > >> >> > of
> > > >> >> > Procomm that will fit on a single floppy.
> > > >> >> >
> > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > >> >> > full
> > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > >> >> > tricky
> > > >> >> > and
> > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > >> >> > kind
> > > >> >> > of
> > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > >> >> > a
> > > >> >> > single floppy and run on systems with limited resources
> > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > >> >> > one
> > > >> >> > seems to want 4MB of RAM.
> > > >> >> >
> > > >> >> > There are plenty of people on the web who have too much time on
> > > >> >> > their
> > > >> >> > hands and are still playing with machines even older than the
> > > >> >> > Grid...
> > > >> >> > You
> > > >> >> > can still buy new after-market accessories for Commodores, for
> > > >> >> > example,
> > > >> >> > so
> > > >> >> > don't assume that there are no new solutions to old problems.
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > >> >> >>
> > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > >> >> >> >
> > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > >> >> >> > port
> > > >> >> >> > to
> > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > >> >> >> > made
> > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > >> >> >> > And,
> > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > >> >> >> > browser
> > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > >> >> >> > say
> > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > >> >> >> > Go
> > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > >> >> >> > a
> > > >> >> >> > while.
> > > >> >> >> >
> > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > >> >> >> > last
> > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > >> >> >> > force
> > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > >> >> >> > unless
> > > >> >> >> > it
> > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > >> >> >> > installed
> > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > >> >> >> > one
> > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > >> >> >> > half
> > > >> >> >> > hour to boot.
> > > >> >> >> >
> > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > >> >> >> > else
> > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > >> >> >> > with
> > > >> >> >> > a
> > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > >> >> >> > OS/browser
> > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > >> >> >> >
> > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > >> >> >> > <doug@> wrote:
> > > >> >> >> > >
> > > >> >> >> > > Like the hack job? :O
> > > >> >> >> > >
> > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > >> >> >> > > screes?
> > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > >> >> >> > > fix it?) or look for a replacement?
> > > >> >> >> > >
> > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > >> >> >> > > the point there.
> > > >> >> >> > >
> > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > >> >> >> > > I'd need the LAN hardware I guess.
> > > >> >> >> > > Any other ideas?
> > > >> >> >> > >
> > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > >> >> >> > > contacts
> > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > >> >> >> > > metal.
> > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > >> >> >> > > the
> > > >> >> >> > > radial DC jack. Strange?
> > > >> >> >> > >
> > > >> >> >> > > DC
> > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > >
> > > >> >> >> > > > Great job, Doug!
> > > >> >> >> > > >
> > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > >> >> >> > > > beautiful
> > > >> >> >> > machines? And yep, that's the way it works.
> > > >> >> >> > > >
> > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > >> >> >> > > > registers
> > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > >> >> >> > the
> > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > >> >> >> > simply
> > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > >> >> >> > everything's hunky-dory.
> > > >> >> >> > > >
> > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > >> >> >> > > > upgrade
> > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > >> >> >> > Great
> > > >> >> >> > to
> > > >> >> >> > hear the HDD is good too.
> > > >> >> >> > > >
> > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > >> >> >> > > > that
> > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > >> >> >> > 1520,
> > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > >> >> >> > shipping.
> > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > >> >> >> > that
> > > >> >> >> > was
> > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > >> >> >> > discover
> > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > >> >> >> > had
> > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > >> >> >> > this
> > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > >> >> >> > a
> > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > >> >> >> > But
> > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > >> >> >> > The
> > > >> >> >> > original owner of this machine definitely took care of it.
> > > >> >> >> > > >
> > > >> >> >> > > > Phil
> > > >> >> >> > > >
> > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > >
> > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > >> >> >> > > > > to
> > > >> >> >> > > > > a
> > > >> >> >> > convenient place for the battery. Upon power up it said
> > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > >> >> >> > > > > wrong
> > > >> >> >> > > > > with
> > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > >> >> >> > > > > POST
> > > >> >> >> > and Autoexec.
> > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > >> >> >> > > > > Now it boots cleanly.
> > > >> >> >> > > > > Has Lotus123 on the HD.
> > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > >> >> >> > > > > everything
> > > >> >> >> > > > > works.
> > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > >> >> >> > > > > RAM,
> > > >> >> >> > > > > a
> > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > >> >> >> > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > >> >> >> > > > > > X2
> > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > >> >> >> > > > > > make sure the rest of it is still good.
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > >> >> >> > <andrebakken@> wrote:
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > >> >> >> > > > > > > difference.
> > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > >> >> >> > directly
> > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > >> >> >> > > > > > > will
> > > >> >> >> > radiate more interference/noise out onto the mains.
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > There are two in there that are the same.
> > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > >> >> >> > > > > > > > I have them out already.
> > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > DC
> > > >> >> >> > > > > ; > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Good Find, DC
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > >> >> >> > and
> > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > >> >> >> > them
> > > >> >> >> > for you.
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Phil
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > >> >> >> > > > > > > > > > in
> > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > >> >> >> > replace both
> > > >> >> >> > > > > > > > > > of course.
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > DC
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > >> >> >> > > > > > > > > > > that
> > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > >> >> >> > > > > > > > > > > supply
> > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > >> >> >> > (unfortunately,
> > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > >> >> >> > > > > > > > > > > isolation!)
> > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > >> >> >> > > > > > > > > > > manuals
> > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > >> >> >> > > > > > > > > > > pointers
> > > >> >> >> > form
> > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > >> >> >> > > > > > > > > > > dead
> > > >> >> >> > diagnosis.
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > >> >> >> > > > > > > > > > > 1530
> > > >> >> >> > > > > > > > > > > will
> > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > >> >> >> > > > > > > > > > > DC
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > >
> > > >> >> >> > >
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > >> >> >> that
> > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > >> >> >> like
> > > >> >> >> a
> > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > >> >> >> and a
> > > >> >> >> stack? It's been so long since I messed with dos environment
> > > >> >> >> networking
> > > >> >> >> I forget.
> > > >> >> >>
> > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > >> >> >> equation,
> > > >> >> >> but I don' t have any references right now over a dos stack.
> > > >> >> >>
> > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > >> >> >> better,
> > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > >> >> >>
> > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > >> >> >> I'm
> > > >> >> >> asking for everything here. Objective is to have something that
> > > >> >> >> could
> > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > >> >> >> a
> > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > >> >> >>
> > > >> >> >> jim
> > > >> >> >> >
> > > >> >> >> > ,___
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > ------------------------------------
> > > >> >> >
> > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >>
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > ------------------------------------
> > > >> >
> gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >
> > > >> >
> > > >> >
> > > >>
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> >
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
Date: Wed, 17 Oct 2012 17:30:19 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
Ouch.
Thanks for the heads up.
Another option: pull the SIPP sockets and install
SIMM sockets. Think the SIMMs would clear in a socket?
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM. Once I soldered the pins on, the module height would not allow the cover to go on.
> Your results may vary,
> -Shawn
>
> -------- Original message --------
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> From: "techtalklive@..." <doug@...>
> To: RuGRiD-Laptop@yahoogroups.com
> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> Well that sounds promising. The only thing that would
> top that would be a native SCSI attached to the bus connectors
> in the accessory port. A ParPort one would do in the meantime.
> Thanks!
>
> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> Anyone know the mem speed? Hate to take the thing apart right
> now to find out.
> Thanks!
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
> >
> > The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > > As I might have mentioned in another post, if I could get
> > > another PC to appear as a mounted drive to the GRiD I'd be in
> > > real fat city. Then I'd have the machine wide open to the rest of the world.
> > > Any ideas there?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >
> > > > Good luck with the Backpack stuff.
> > > >
> > > > There's a book called "Hot Links", which was produced by the same people
> > > > that produced LapLink. In the back of the book is a disk with programs that
> > > > will let you transfer files, either via null modem cable or LapLink cable.
> > > > I doubt that the book is still in print, but it might be something to look
> > > > for. If you get the book without the disk, let me know, and I'll get you
> > > > the software. I can't remember if it lets you map the host drive to the
> > > > client machine, but that would be cool, if it does that.
> > > >
> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > "She said it was either her or the ham radio. Over."
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "techtalklive@" <doug@>
> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > > Sent: Monday, October 15, 2012 10:47 PM
> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >
> > > >
> > > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > > Yes checking out Backpacks now. Just collected drivers from
> > > > > around the web for them and am checking on ebay for
> > > > > equipment. I suspect they will work.
> > > > >
> > > > > I thought I might take a look to see if there was parallel port
> > > > > software that would work like "laplink" to tether to another PC
> > > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > > the 1530.
> > > > >
> > > > > That would be cool... and avoid purchasing old hardware.
> > > > >
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >>
> > > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > > >> you
> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > > >>
> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> "She said it was either her or the ham radio. Over."
> > > > >>
> > > > >>
> > > > >> ----- Original Message -----
> > > > >> From: "techtalklive@" <doug@>
> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >>
> > > > >>
> > > > >> >
> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > > >> > driver
> > > > >> > support.
> > > > >> > Other similar devices don't seem to be on the used market right not.
> > > > >> > I'm also considering a parallel based disk drive at this point.
> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > > >> > didn't
> > > > >> > actually run the numbers.
> > > > >> > DC
> > > > >> >
> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >> >>
> > > > >> >> I don't think I'd even bother with the serial port. You might get
> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > > >> >> 16550AFN
> > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > > >> >> have
> > > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > > >> >> parallel
> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > > >> >> even
> > > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > > >> >>
> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> >> "She said it was either her or the ham radio. Over."
> > > > >> >>
> > > > >> >>
> > > > >> >> ----- Original Message -----
> > > > >> >> From: "Androgenoide" <androgenoide@>
> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >> >>
> > > > >> >>
> > > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > > >> >> > Ethernet adapter that will work through either the serial or
> > > > >> >> > parallel
> > > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > > >> >> > the
> > > > >> >> > time. I've got a serial device server now that would probably work
> > > > >> >> > too
> > > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > > >> >> > to
> > > > >> >> > see
> > > > >> >> > what would be required. Either of those solutions would be limited
> > > > >> >> > by
> > > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > > >> >> > speeds
> > > > >> >> > are out of the question!
> > > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > > >> >> > also
> > > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > > >> >> > internet
> > > > >> >> > connection... (if you still have access to a dialup service... if
> > > > >> >> > not,
> > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > > >> >> > few
> > > > >> >> > hours at a time).
> > > > >> >> >
> > > > >> >> > Generally speaking, if an old machine has either a serial or
> > > > >> >> > parallel
> > > > >> >> > port
> > > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > > >> >> > transfer
> > > > >> >> > files to another machine. Even if it has no floppy you can use
> > > > >> >> > another
> > > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > > >> >> > lot
> > > > >> >> > of
> > > > >> >> > file transfer programs out there, from Kermit to the original
> > > > >> >> > version
> > > > >> >> > of
> > > > >> >> > Procomm that will fit on a single floppy.
> > > > >> >> >
> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > > >> >> > full
> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > > >> >> > tricky
> > > > >> >> > and
> > > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > > >> >> > kind
> > > > >> >> > of
> > > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > > >> >> > a
> > > > >> >> > single floppy and run on systems with limited resources
> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > > >> >> > one
> > > > >> >> > seems to want 4MB of RAM.
> > > > >> >> >
> > > > >> >> > There are plenty of people on the web who have too much time on
> > > > >> >> > their
> > > > >> >> > hands and are still playing with machines even older than the
> > > > >> >> > Grid...
> > > > >> >> > You
> > > > >> >> > can still buy new after-market accessories for Commodores, for
> > > > >> >> > example,
> > > > >> >> > so
> > > > >> >> > don't assume that there are no new solutions to old problems.
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > > >> >> >>
> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > > >> >> >> >
> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > > >> >> >> > port
> > > > >> >> >> > to
> > > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > > >> >> >> > made
> > > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > > >> >> >> > And,
> > > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > > >> >> >> > browser
> > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > > >> >> >> > say
> > > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > > >> >> >> > Go
> > > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > > >> >> >> > a
> > > > >> >> >> > while.
> > > > >> >> >> >
> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > > >> >> >> > last
> > > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > > >> >> >> > force
> > > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > > >> >> >> > unless
> > > > >> >> >> > it
> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > > >> >> >> > installed
> > > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > > >> >> >> > one
> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > > >> >> >> > half
> > > > >> >> >> > hour to boot.
> > > > >> >> >> >
> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > > >> >> >> > else
> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > > >> >> >> > with
> > > > >> >> >> > a
> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > > >> >> >> > OS/browser
> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > > >> >> >> >
> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > > >> >> >> > <doug@> wrote:
> > > > >> >> >> > >
> > > > >> >> >> > > Like the hack job? :O
> > > > >> >> >> > >
> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > > >> >> >> > > screes?
> > > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > > >> >> >> > > fix it?) or look for a replacement?
> > > > >> >> >> > >
> > > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > > >> >> >> > > the point there.
> > > > >> >> >> > >
> > > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > > >> >> >> > > I'd need the LAN hardware I guess.
> > > > >> >> >> > > Any other ideas?
> > > > >> >> >> > >
> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > > >> >> >> > > contacts
> > > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > > >> >> >> > > metal.
> > > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > > >> >> >> > > the
> > > > >> >> >> > > radial DC jack. Strange?
> > > > >> >> >> > >
> > > > >> >> >> > > DC
> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > >
> > > > >> >> >> > > > Great job, Doug!
> > > > >> >> >> > > >
> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > > >> >> >> > > > beautiful
> > > > >> >> >> > machines? And yep, that's the way it works.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > > >> >> >> > > > registers
> > > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > > >> >> >> > the
> > > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > > >> >> >> > simply
> > > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > > >> >> >> > everything's hunky-dory.
> > > > >> >> >> > > >
> > > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > > >> >> >> > > > upgrade
> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > > >> >> >> > Great
> > > > >> >> >> > to
> > > > >> >> >> > hear the HDD is good too.
> > > > >> >> >> > > >
> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > > >> >> >> > > > that
> > > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > > >> >> >> > 1520,
> > > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > > >> >> >> > shipping.
> > > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > > >> >> >> > that
> > > > >> >> >> > was
> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > > >> >> >> > discover
> > > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > > >> >> >> > had
> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > > >> >> >> > this
> > > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > > >> >> >> > a
> > > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > > >> >> >> > But
> > > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > > >> >> >> > The
> > > > >> >> >> > original owner of this machine definitely took care of it.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Phil
> > > > >> >> >> > > >
> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > > >> >> >> > > > > to
> > > > >> >> >> > > > > a
> > > > >> >> >> > convenient place for the battery. Upon power up it said
> > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > > >> >> >> > > > > wrong
> > > > >> >> >> > > > > with
> > > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > > >> >> >> > > > > POST
> > > > >> >> >> > and Autoexec.
> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > >> >> >> > > > > Now it boots cleanly.
> > > > >> >> >> > > > > Has Lotus123 on the HD.
> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > > >> >> >> > > > > everything
> > > > >> >> >> > > > > works.
> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > > >> >> >> > > > > RAM,
> > > > >> >> >> > > > > a
> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > >> >> >> > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > > >> >> >> > > > > > X2
> > > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > > >> >> >> > > > > > make sure the rest of it is still good.
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > > >> >> >> > <andrebakken@> wrote:
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > > >> >> >> > > > > > > difference.
> > > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > > >> >> >> > directly
> > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > > >> >> >> > > > > > > will
> > > > >> >> >> > radiate more interference/noise out onto the mains.
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > There are two in there that are the same.
> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > >> >> >> > > > > > > > I have them out already.
> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > DC
> > > > >> >> >> > > > > ; > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Good Find, DC
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > > >> >> >> > and
> > > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > > >> >> >> > them
> > > > >> >> >> > for you.
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Phil
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > > >> >> >> > > > > > > > > > in
> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > > >> >> >> > replace both
> > > > >> >> >> > > > > > > > > > of course.
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > > >> >> >> > > > > > > > > > > that
> > > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > > >> >> >> > > > > > > > > > > supply
> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > > >> >> >> > (unfortunately,
> > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > > >> >> >> > > > > > > > > > > isolation!)
> > > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > > >> >> >> > > > > > > > > > > manuals
> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > > >> >> >> > > > > > > > > > > pointers
> > > > >> >> >> > form
> > > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > > >> >> >> > > > > > > > > > > dead
> > > > >> >> >> > diagnosis.
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > > >> >> >> > > > > > > > > > > 1530
> > > > >> >> >> > > > > > > > > > > will
> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > > >> >> >> > > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > >
> > > > >> >> >> > >
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > > >> >> >> that
> > > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > > >> >> >> like
> > > > >> >> >> a
> > > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > > >> >> >> and a
> > > > >> >> >> stack? It's been so long since I messed with dos environment
> > > > >> >> >> networking
> > > > >> >> >> I forget.
> > > > >> >> >>
> > > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > > >> >> >> equation,
> > > > >> >> >> but I don' t have any references right now over a dos stack.
> > > > >> >> >>
> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > > >> >> >> better,
> > > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > > >> >> >>
> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > > >> >> >> I'm
> > > > >> >> >> asking for everything here. Objective is to have something that
> > > > >> >> >> could
> > > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > > >> >> >> a
> > > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > > >> >> >>
> > > > >> >> >> jim
> > > > >> >> >> >
> > > > >> >> >> > ,___
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > ------------------------------------
> > > > >> >> >
> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >>
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> > ------------------------------------
> > > > >> >
> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > >
> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
Date: Wed, 17 Oct 2012 14:03:09 -0400
From: Shawnerz
Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=utf-8
I believe SIMM sockets are surface mount. I could be wrong. It's not impossible, just a lot of work.
-Shawn
-------- Original message --------
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
From: "techtalklive@ymail.com" <doug@crawfordltd.com>
To: RuGRiD-Laptop@yahoogroups.com
CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Ouch.
Thanks for the heads up.
Another option: pull the SIPP sockets and install
SIMM sockets. Think the SIMMs would clear in a socket?
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM. Â Once I soldered the pins on, the module height would not allow the cover to go on.
> Your results may vary,
> -Shawn
>
> -------- Original message --------
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> From: "techtalklive@..." <doug@...>
> To: RuGRiD-Laptop@yahoogroups.com
> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> Well that sounds promising. The only thing that would
> top that would be a native SCSI attached to the bus connectors
> in the accessory port. A ParPort one would do in the meantime.
> Thanks!
>
> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> Anyone know the mem speed? Hate to take the thing apart right
> now to find out.
> Thanks!
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
> >
> > The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > > As I might have mentioned in another post, if I could get
> > > another PC to appear as a mounted drive to the GRiD I'd be in
> > > real fat city. Then I'd have the machine wide open to the rest of the world.
> > > Any ideas there?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >
> > > > Good luck with the Backpack stuff.
> > > >
> > > > There's a book called "Hot Links", which was produced by the same people
> > > > that produced LapLink. In the back of the book is a disk with programs that
> > > > will let you transfer files, either via null modem cable or LapLink cable.
> > > > I doubt that the book is still in print, but it might be something to look
> > > > for. If you get the book without the disk, let me know, and I'll get you
> > > > the software. I can't remember if it lets you map the host drive to the
> > > > client machine, but that would be cool, if it does that.
> > > >
> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > "She said it was either her or the ham radio. Over."
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "techtalklive@" <doug@>
> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > > Sent: Monday, October 15, 2012 10:47 PM
> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >
> > > >
> > > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > > Yes checking out Backpacks now. Just collected drivers from
> > > > > around the web for them and am checking on ebay for
> > > > > equipment. I suspect they will work.
> > > > >
> > > > > I thought I might take a look to see if there was parallel port
> > > > > software that would work like "laplink" to tether to another PC
> > > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > > the 1530.
> > > > >
> > > > > That would be cool... and avoid purchasing old hardware.
> > > > >
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >>
> > > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > > >> you
> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > > >>
> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> "She said it was either her or the ham radio. Over."
> > > > >>
> > > > >>
> > > > >> ----- Original Message -----
> > > > >> From: "techtalklive@" <doug@>
> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >>
> > > > >>
> > > > >> >
> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > > >> > driver
> > > > >> > support.
> > > > >> > Other similar devices don't seem to be on the used market right not.
> > > > >> > I'm also considering a parallel based disk drive at this point.
> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > > >> > didn't
> > > > >> > actually run the numbers.
> > > > >> > DC
> > > > >> >
> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >> >>
> > > > >> >> I don't think I'd even bother with the serial port. You might get
> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > > >> >> 16550AFN
> > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > > >> >> have
> > > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > > >> >> parallel
> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > > >> >> even
> > > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > > >> >>
> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> >> "She said it was either her or the ham radio. Over."
> > > > >> >>
> > > > >> >>
> > > > >> >> ----- Original Message -----
> > > > >> >> From: "Androgenoide" <androgenoide@>
> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >> >>
> > > > >> >>
> > > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > > >> >> > Ethernet adapter that will work through either the serial or
> > > > >> >> > parallel
> > > > >> >> > ports.  I used the Xircom on the parallel port because I had one at
> > > > >> >> > the
> > > > >> >> > time.  I've got a serial device server now that would probably work
> > > > >> >> > too
> > > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > > >> >> > to
> > > > >> >> > see
> > > > >> >> > what would be required.  Either of those solutions would be limited
> > > > >> >> > by
> > > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > > >> >> > speeds
> > > > >> >> > are out of the question!
> > > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > > >> >> > also
> > > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > > >> >> > internet
> > > > >> >> > connection... (if you still have access to a dialup service... if
> > > > >> >> > not,
> > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > > >> >> > few
> > > > >> >> > hours at a time).
> > > > >> >> >
> > > > >> >> > Generally speaking, if an old machine has either a serial or
> > > > >> >> > parallel
> > > > >> >> > port
> > > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > > >> >> > transfer
> > > > >> >> > files to another machine.  Even if it has no floppy you can use
> > > > >> >> > another
> > > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > > >> >> > lot
> > > > >> >> > of
> > > > >> >> > file transfer programs out there, from Kermit to the original
> > > > >> >> > version
> > > > >> >> > of
> > > > >> >> > Procomm that will fit on a single floppy.
> > > > >> >> >
> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > > >> >> > full
> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > > >> >> > tricky
> > > > >> >> > and
> > > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > > >> >> > kind
> > > > >> >> > of
> > > > >> >> > an extreme project.  I've heard of a Linux distro that will fit on
> > > > >> >> > a
> > > > >> >> > single floppy and run on systems with limited resources
> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > > >> >> > one
> > > > >> >> > seems to want 4MB of RAM.
> > > > >> >> >
> > > > >> >> > There are plenty of people on the web who have too much time on
> > > > >> >> > their
> > > > >> >> > hands and are still playing with machines even older than the
> > > > >> >> > Grid...
> > > > >> >> > You
> > > > >> >> > can still buy new after-market accessories for Commodores, for
> > > > >> >> > example,
> > > > >> >> > so
> > > > >> >> > don't assume that there are no new solutions to old problems.
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > > >> >> >>
> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > > >> >> >> >
> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > > >> >> >> > port
> > > > >> >> >> > to
> > > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > > >> >> >> > made
> > > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > > >> >> >> > And,
> > > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > > >> >> >> > browser
> > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > > >> >> >> > say
> > > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > > >> >> >> > Go
> > > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > > >> >> >> > a
> > > > >> >> >> > while.
> > > > >> >> >> >
> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > > >> >> >> > last
> > > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > > >> >> >> > force
> > > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > > >> >> >> > unless
> > > > >> >> >> > it
> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > > >> >> >> > installed
> > > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > > >> >> >> > one
> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > > >> >> >> > half
> > > > >> >> >> > hour to boot.
> > > > >> >> >> >
> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > > >> >> >> > else
> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > > >> >> >> > with
> > > > >> >> >> > a
> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > > >> >> >> > OS/browser
> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > > >> >> >> >
> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > > >> >> >> > <doug@> wrote:
> > > > >> >> >> > >
> > > > >> >> >> > > Like the hack job? :O
> > > > >> >> >> > >
> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > > >> >> >> > > screes?
> > > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > > >> >> >> > > fix it?) or look for a replacement?
> > > > >> >> >> > >
> > > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > > >> >> >> > > the point there.
> > > > >> >> >> > >
> > > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > > >> >> >> > > I'd need the LAN hardware I guess.
> > > > >> >> >> > > Any other idea s?
> > > > >> >> >> > >
> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > > >> >> >> > > contacts
> > > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > > >> >> >> > > metal.
> > > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > > >> >> >> > > the
> > > > >> >> >> > > radial DC jack. Strange?
> > > > >> >> >> > >
> > > > >> >> >> > > DC
> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > >
> > > > >> >> >> > > > Great job, Doug!
> > > > >> >> >> > > >
> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > > >> >> >> > > > beautiful
> > > > >> >> >> > machines? And yep, that's the way it works.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > > >>Â >> >> > > > registers
> > > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > > >> >> >> > the
> > > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > > >> >> >> > simply
> > > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > > >> >> >> > everything's hunky-dory.
> > > > >> >> >> > > >
> > > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > > >> >> >> > > > upgrade
> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > > >> >> >> > Great
> > > > >> >> >> > to
> > > > >> >> >> > hear the HDD is good too.
> > > > >> >> >> > > >
> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > > >> >> >> > > > that
> > > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > > >> >> >> > 1520,
> > > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > > >> >> >> > shipping.
> > > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > > >> >> >> > that
> > > > >> >> >> > was
> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > > >> >> >> > discover
> > > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > > >> >> >> > had
> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > > >> >> >> > this
> > > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > > >> >> >> > a
> > > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > > >> >> >> > But
> > > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > > >> >> >> > The
> > > > >> >> >> > original owner of this machine definitely took care of it.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Phil
> > > > >> >> >> > > >
> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > > >> >> >> > > > > to
> > > > >> >> >> > > > > a
> > > > >> >> >> > convenient place for the battery. Upon power up it said
> > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > > >> >> >> > > > > wrong
> > > > >> >> >> > > > > with
> > > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > > >> >> >> > > > > POST
> > > > >> >> >> > and Autoexec.
> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > >> >> >> > > > > Now it boots cleanly.
> > > > >> >> >> > > > > Has Lotus123 on the HD.
> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > > >> >> >> > > > > everything
> > > > >> >> >> > > > > works.
> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > > >> >> >> > > > > RAM,
> > > > >> >> >> > > > > a
> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > >> >> >> > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > > >> >> >> > > > > > X2
> > > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > > >> >> >> > > > > > make sure the rest of it is still good.
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > gt; >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > > >> >> >> > <andrebakken@> wrote:
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > > >> >> >> > > > > > > difference.
> > > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > > >> >> >> > directly
> > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > > >> >> >> > > > > > > will
> > > > >> >> >> > radiate more interference/noise out onto the mains.
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > There are two in there that are the same.
> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > >> >> >> > > > > > > > I have them out already.
> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > DC
> > > > >> >> >> > > > >Â ; > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Good Find, DC
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > > >> >> >> > and
> > > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > > >> >> >> > them
> > > > >> >> >> > for you.
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Phil
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > > >> >> >> > > > > > > > > > in
> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > > >> >> >> > replace both
> > > > >> >> >> > > > > > > > > > of course.
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > > >> >> >> > > > > > > > > > > that
> > > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > > >> >> >> > > > > > > > > > > supply
> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > > >> >> >> > (unfortunately,
> > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > > >> >> >> > > > > > > > > > > isolation!)
> > > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > > >> >> >> > > > > > > > > > > manuals
> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > > >> >> >> > > > > > > > > > > pointers
> > > > >> >> >> > form
> > > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > > >> >> >> > > > > > > > > > > dead
> > > > >> >> >> > diagnosis.
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > > >> >> >> > > > > > > > > > > 1530
> > > > >> >> >> > > > > > > > > > > will
> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > > >> >> >> > > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > >
> > > > >> >> >> > >
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > > >> >> >> that
> > > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > > >> >> >> like
> > > > >> >> >> a
> > > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > > >> >> >> and a
> > > > >> >> >> stack? It's been so long since I messed with dos environment
> > > > >> >> >> networking
> > > > >> >> >> I forget.
> > > > >> >> >>
> > > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > > >> >> >> equation,
> > > > >> >> >> but I don' t have any references right now over a dos stack.
> > > > >> >> >>
> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > > >> >> >> better,
> > > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > > >> >> >>
> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > > >> >> >> I'm
> > > > >> >> >> asking for everything here. Objective is to have something that
> > > > >> >> >> could
> > > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > > >> >> >> a
> > > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > > >> >> >>
> > > > >> >> >> jim
> > > > >> >> >> >
> > > > >> >> >> > ,___
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > ------------------------------------
> > > > >> >> >
> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >>
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> > ------------------------------------
> > > > >> >
> >Â gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > >
> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
Date: Wed, 17 Oct 2012 18:56:33 -0000
From: "Androgenoide"
Subject: Re: Typical 1500 series failure modes?
I found one of those in a thrift store just a couple weeks ago... an Adaptec MiniSCSI EPP still in the original box with the envelope of driver disks unopened. Haven't tried to use it yet but, from skimming through the manual, it seems to have some limits on the types of devices it works with.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
>
> The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > As I might have mentioned in another post, if I could get
> > another PC to appear as a mounted drive to the GRiD I'd be in
> > real fat city. Then I'd have the machine wide open to the rest of the world.
> > Any ideas there?
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >
> > > Good luck with the Backpack stuff.
> > >
> > > There's a book called "Hot Links", which was produced by the same people
> > > that produced LapLink. In the back of the book is a disk with programs that
> > > will let you transfer files, either via null modem cable or LapLink cable.
> > > I doubt that the book is still in print, but it might be something to look
> > > for. If you get the book without the disk, let me know, and I'll get you
> > > the software. I can't remember if it lets you map the host drive to the
> > > client machine, but that would be cool, if it does that.
> > >
> > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > "She said it was either her or the ham radio. Over."
> > >
> > >
> > > ----- Original Message -----
> > > From: "techtalklive@" <doug@>
> > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > Sent: Monday, October 15, 2012 10:47 PM
> > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >
> > >
> > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > Yes checking out Backpacks now. Just collected drivers from
> > > > around the web for them and am checking on ebay for
> > > > equipment. I suspect they will work.
> > > >
> > > > I thought I might take a look to see if there was parallel port
> > > > software that would work like "laplink" to tether to another PC
> > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > the 1530.
> > > >
> > > > That would be cool... and avoid purchasing old hardware.
> > > >
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >>
> > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > >> you
> > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > >>
> > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> "She said it was either her or the ham radio. Over."
> > > >>
> > > >>
> > > >> ----- Original Message -----
> > > >> From: "techtalklive@" <doug@>
> > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >>
> > > >>
> > > >> >
> > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > >> > driver
> > > >> > support.
> > > >> > Other similar devices don't seem to be on the used market right not.
> > > >> > I'm also considering a parallel based disk drive at this point.
> > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > >> > didn't
> > > >> > actually run the numbers.
> > > >> > DC
> > > >> >
> > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >> >>
> > > >> >> I don't think I'd even bother with the serial port. You might get
> > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > >> >> 16550AFN
> > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > >> >> have
> > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > >> >> parallel
> > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > >> >> even
> > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > >> >>
> > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> >> "She said it was either her or the ham radio. Over."
> > > >> >>
> > > >> >>
> > > >> >> ----- Original Message -----
> > > >> >> From: "Androgenoide" <androgenoide@>
> > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >> >>
> > > >> >>
> > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > >> >> > Ethernet adapter that will work through either the serial or
> > > >> >> > parallel
> > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > >> >> > the
> > > >> >> > time. I've got a serial device server now that would probably work
> > > >> >> > too
> > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > >> >> > to
> > > >> >> > see
> > > >> >> > what would be required. Either of those solutions would be limited
> > > >> >> > by
> > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > >> >> > speeds
> > > >> >> > are out of the question!
> > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > >> >> > also
> > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > >> >> > internet
> > > >> >> > connection... (if you still have access to a dialup service... if
> > > >> >> > not,
> > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > >> >> > few
> > > >> >> > hours at a time).
> > > >> >> >
> > > >> >> > Generally speaking, if an old machine has either a serial or
> > > >> >> > parallel
> > > >> >> > port
> > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > >> >> > transfer
> > > >> >> > files to another machine. Even if it has no floppy you can use
> > > >> >> > another
> > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > >> >> > lot
> > > >> >> > of
> > > >> >> > file transfer programs out there, from Kermit to the original
> > > >> >> > version
> > > >> >> > of
> > > >> >> > Procomm that will fit on a single floppy.
> > > >> >> >
> > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > >> >> > full
> > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > >> >> > tricky
> > > >> >> > and
> > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > >> >> > kind
> > > >> >> > of
> > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > >> >> > a
> > > >> >> > single floppy and run on systems with limited resources
> > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > >> >> > one
> > > >> >> > seems to want 4MB of RAM.
> > > >> >> >
> > > >> >> > There are plenty of people on the web who have too much time on
> > > >> >> > their
> > > >> >> > hands and are still playing with machines even older than the
> > > >> >> > Grid...
> > > >> >> > You
> > > >> >> > can still buy new after-market accessories for Commodores, for
> > > >> >> > example,
> > > >> >> > so
> > > >> >> > don't assume that there are no new solutions to old problems.
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > >> >> >>
> > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > >> >> >> >
> > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > >> >> >> > port
> > > >> >> >> > to
> > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > >> >> >> > made
> > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > >> >> >> > And,
> > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > >> >> >> > browser
> > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > >> >> >> > say
> > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > >> >> >> > Go
> > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > >> >> >> > a
> > > >> >> >> > while.
> > > >> >> >> >
> > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > >> >> >> > last
> > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > >> >> >> > force
> > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > >> >> >> > unless
> > > >> >> >> > it
> > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > >> >> >> > installed
> > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > >> >> >> > one
> > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > >> >> >> > half
> > > >> >> >> > hour to boot.
> > > >> >> >> >
> > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > >> >> >> > else
> > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > >> >> >> > with
> > > >> >> >> > a
> > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > >> >> >> > OS/browser
> > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > >> >> >> >
> > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > >> >> >> > <doug@> wrote:
> > > >> >> >> > >
> > > >> >> >> > > Like the hack job? :O
> > > >> >> >> > >
> > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > >> >> >> > > screes?
> > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > >> >> >> > > fix it?) or look for a replacement?
> > > >> >> >> > >
> > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > >> >> >> > > the point there.
> > > >> >> >> > >
> > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > >> >> >> > > I'd need the LAN hardware I guess.
> > > >> >> >> > > Any other ideas?
> > > >> >> >> > >
> > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > >> >> >> > > contacts
> > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > >> >> >> > > metal.
> > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > >> >> >> > > the
> > > >> >> >> > > radial DC jack. Strange?
> > > >> >> >> > >
> > > >> >> >> > > DC
> > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > >
> > > >> >> >> > > > Great job, Doug!
> > > >> >> >> > > >
> > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > >> >> >> > > > beautiful
> > > >> >> >> > machines? And yep, that's the way it works.
> > > >> >> >> > > >
> > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > >> >> >> > > > registers
> > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > >> >> >> > the
> > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > >> >> >> > simply
> > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > >> >> >> > everything's hunky-dory.
> > > >> >> >> > > >
> > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > >> >> >> > > > upgrade
> > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > >> >> >> > Great
> > > >> >> >> > to
> > > >> >> >> > hear the HDD is good too.
> > > >> >> >> > > >
> > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > >> >> >> > > > that
> > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > >> >> >> > 1520,
> > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > >> >> >> > shipping.
> > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > >> >> >> > that
> > > >> >> >> > was
> > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > >> >> >> > discover
> > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > >> >> >> > had
> > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > >> >> >> > this
> > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > >> >> >> > a
> > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > >> >> >> > But
> > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > >> >> >> > The
> > > >> >> >> > original owner of this machine definitely took care of it.
> > > >> >> >> > > >
> > > >> >> >> > > > Phil
> > > >> >> >> > > >
> > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > >
> > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > >> >> >> > > > > to
> > > >> >> >> > > > > a
> > > >> >> >> > convenient place for the battery. Upon power up it said
> > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > >> >> >> > > > > wrong
> > > >> >> >> > > > > with
> > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > >> >> >> > > > > POST
> > > >> >> >> > and Autoexec.
> > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > >> >> >> > > > > Now it boots cleanly.
> > > >> >> >> > > > > Has Lotus123 on the HD.
> > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > >> >> >> > > > > everything
> > > >> >> >> > > > > works.
> > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > >> >> >> > > > > RAM,
> > > >> >> >> > > > > a
> > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > >> >> >> > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > >> >> >> > > > > > X2
> > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > >> >> >> > > > > > make sure the rest of it is still good.
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > >> >> >> > <andrebakken@> wrote:
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > >> >> >> > > > > > > difference.
> > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > >> >> >> > directly
> > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > >> >> >> > > > > > > will
> > > >> >> >> > radiate more interference/noise out onto the mains.
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > There are two in there that are the same.
> > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > >> >> >> > > > > > > > I have them out already.
> > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > DC
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Good Find, DC
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > >> >> >> > and
> > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > >> >> >> > them
> > > >> >> >> > for you.
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Phil
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > >> >> >> > > > > > > > > > in
> > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > >> >> >> > replace both
> > > >> >> >> > > > > > > > > > of course.
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > DC
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > >> >> >> > > > > > > > > > > that
> > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > >> >> >> > > > > > > > > > > supply
> > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > >> >> >> > (unfortunately,
> > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > >> >> >> > > > > > > > > > > isolation!)
> > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > >> >> >> > > > > > > > > > > manuals
> > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > >> >> >> > > > > > > > > > > pointers
> > > >> >> >> > form
> > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > >> >> >> > > > > > > > > > > dead
> > > >> >> >> > diagnosis.
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > >> >> >> > > > > > > > > > > 1530
> > > >> >> >> > > > > > > > > > > will
> > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > >> >> >> > > > > > > > > > > DC
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > >
> > > >> >> >> > >
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > >> >> >> that
> > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > >> >> >> like
> > > >> >> >> a
> > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > >> >> >> and a
> > > >> >> >> stack? It's been so long since I messed with dos environment
> > > >> >> >> networking
> > > >> >> >> I forget.
> > > >> >> >>
> > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > >> >> >> equation,
> > > >> >> >> but I don' t have any references right now over a dos stack.
> > > >> >> >>
> > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > >> >> >> better,
> > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > >> >> >>
> > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > >> >> >> I'm
> > > >> >> >> asking for everything here. Objective is to have something that
> > > >> >> >> could
> > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > >> >> >> a
> > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > >> >> >>
> > > >> >> >> jim
> > > >> >> >> >
> > > >> >> >> > ,___
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > ------------------------------------
> > > >> >> >
> > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >>
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > ------------------------------------
> > > >> >
> > > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >
> > > >> >
> > > >> >
> > > >>
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> >
>
Date: Wed, 17 Oct 2012 22:00:18 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
That's wonderful!
I got my MiniSCSI EPP off ebay, but it didn't have the software at all. I have obtained SCSIworks disks, but I am not sure if those have the same programs. I would like to ontain the software on those disks if possible. Thanks.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Androgenoide" <androgenoide@...> wrote:
>
> I found one of those in a thrift store just a couple weeks ago... an Adaptec MiniSCSI EPP still in the original box with the envelope of driver disks unopened. Haven't tried to use it yet but, from skimming through the manual, it seems to have some limits on the types of devices it works with.
>
>
>
>
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
> >
> > The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > > As I might have mentioned in another post, if I could get
> > > another PC to appear as a mounted drive to the GRiD I'd be in
> > > real fat city. Then I'd have the machine wide open to the rest of the world.
> > > Any ideas there?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >
> > > > Good luck with the Backpack stuff.
> > > >
> > > > There's a book called "Hot Links", which was produced by the same people
> > > > that produced LapLink. In the back of the book is a disk with programs that
> > > > will let you transfer files, either via null modem cable or LapLink cable.
> > > > I doubt that the book is still in print, but it might be something to look
> > > > for. If you get the book without the disk, let me know, and I'll get you
> > > > the software. I can't remember if it lets you map the host drive to the
> > > > client machine, but that would be cool, if it does that.
> > > >
> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > "She said it was either her or the ham radio. Over."
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "techtalklive@" <doug@>
> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > > Sent: Monday, October 15, 2012 10:47 PM
> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >
> > > >
> > > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > > Yes checking out Backpacks now. Just collected drivers from
> > > > > around the web for them and am checking on ebay for
> > > > > equipment. I suspect they will work.
> > > > >
> > > > > I thought I might take a look to see if there was parallel port
> > > > > software that would work like "laplink" to tether to another PC
> > > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > > the 1530.
> > > > >
> > > > > That would be cool... and avoid purchasing old hardware.
> > > > >
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >>
> > > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > > >> you
> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > > >>
> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> "She said it was either her or the ham radio. Over."
> > > > >>
> > > > >>
> > > > >> ----- Original Message -----
> > > > >> From: "techtalklive@" <doug@>
> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >>
> > > > >>
> > > > >> >
> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > > >> > driver
> > > > >> > support.
> > > > >> > Other similar devices don't seem to be on the used market right not.
> > > > >> > I'm also considering a parallel based disk drive at this point.
> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > > >> > didn't
> > > > >> > actually run the numbers.
> > > > >> > DC
> > > > >> >
> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >> >>
> > > > >> >> I don't think I'd even bother with the serial port. You might get
> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > > >> >> 16550AFN
> > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > > >> >> have
> > > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > > >> >> parallel
> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > > >> >> even
> > > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > > >> >>
> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> >> "She said it was either her or the ham radio. Over."
> > > > >> >>
> > > > >> >>
> > > > >> >> ----- Original Message -----
> > > > >> >> From: "Androgenoide" <androgenoide@>
> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >> >>
> > > > >> >>
> > > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > > >> >> > Ethernet adapter that will work through either the serial or
> > > > >> >> > parallel
> > > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > > >> >> > the
> > > > >> >> > time. I've got a serial device server now that would probably work
> > > > >> >> > too
> > > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > > >> >> > to
> > > > >> >> > see
> > > > >> >> > what would be required. Either of those solutions would be limited
> > > > >> >> > by
> > > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > > >> >> > speeds
> > > > >> >> > are out of the question!
> > > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > > >> >> > also
> > > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > > >> >> > internet
> > > > >> >> > connection... (if you still have access to a dialup service... if
> > > > >> >> > not,
> > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > > >> >> > few
> > > > >> >> > hours at a time).
> > > > >> >> >
> > > > >> >> > Generally speaking, if an old machine has either a serial or
> > > > >> >> > parallel
> > > > >> >> > port
> > > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > > >> >> > transfer
> > > > >> >> > files to another machine. Even if it has no floppy you can use
> > > > >> >> > another
> > > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > > >> >> > lot
> > > > >> >> > of
> > > > >> >> > file transfer programs out there, from Kermit to the original
> > > > >> >> > version
> > > > >> >> > of
> > > > >> >> > Procomm that will fit on a single floppy.
> > > > >> >> >
> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > > >> >> > full
> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > > >> >> > tricky
> > > > >> >> > and
> > > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > > >> >> > kind
> > > > >> >> > of
> > > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > > >> >> > a
> > > > >> >> > single floppy and run on systems with limited resources
> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > > >> >> > one
> > > > >> >> > seems to want 4MB of RAM.
> > > > >> >> >
> > > > >> >> > There are plenty of people on the web who have too much time on
> > > > >> >> > their
> > > > >> >> > hands and are still playing with machines even older than the
> > > > >> >> > Grid...
> > > > >> >> > You
> > > > >> >> > can still buy new after-market accessories for Commodores, for
> > > > >> >> > example,
> > > > >> >> > so
> > > > >> >> > don't assume that there are no new solutions to old problems.
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > > >> >> >>
> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > > >> >> >> >
> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > > >> >> >> > port
> > > > >> >> >> > to
> > > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > > >> >> >> > made
> > > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > > >> >> >> > And,
> > > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > > >> >> >> > browser
> > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > > >> >> >> > say
> > > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > > >> >> >> > Go
> > > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > > >> >> >> > a
> > > > >> >> >> > while.
> > > > >> >> >> >
> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > > >> >> >> > last
> > > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > > >> >> >> > force
> > > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > > >> >> >> > unless
> > > > >> >> >> > it
> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > > >> >> >> > installed
> > > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > > >> >> >> > one
> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > > >> >> >> > half
> > > > >> >> >> > hour to boot.
> > > > >> >> >> >
> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > > >> >> >> > else
> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > > >> >> >> > with
> > > > >> >> >> > a
> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > > >> >> >> > OS/browser
> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > > >> >> >> >
> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > > >> >> >> > <doug@> wrote:
> > > > >> >> >> > >
> > > > >> >> >> > > Like the hack job? :O
> > > > >> >> >> > >
> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > > >> >> >> > > screes?
> > > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > > >> >> >> > > fix it?) or look for a replacement?
> > > > >> >> >> > >
> > > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > > >> >> >> > > the point there.
> > > > >> >> >> > >
> > > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > > >> >> >> > > I'd need the LAN hardware I guess.
> > > > >> >> >> > > Any other ideas?
> > > > >> >> >> > >
> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > > >> >> >> > > contacts
> > > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > > >> >> >> > > metal.
> > > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > > >> >> >> > > the
> > > > >> >> >> > > radial DC jack. Strange?
> > > > >> >> >> > >
> > > > >> >> >> > > DC
> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > >
> > > > >> >> >> > > > Great job, Doug!
> > > > >> >> >> > > >
> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > > >> >> >> > > > beautiful
> > > > >> >> >> > machines? And yep, that's the way it works.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > > >> >> >> > > > registers
> > > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > > >> >> >> > the
> > > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > > >> >> >> > simply
> > > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > > >> >> >> > everything's hunky-dory.
> > > > >> >> >> > > >
> > > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > > >> >> >> > > > upgrade
> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > > >> >> >> > Great
> > > > >> >> >> > to
> > > > >> >> >> > hear the HDD is good too.
> > > > >> >> >> > > >
> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > > >> >> >> > > > that
> > > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > > >> >> >> > 1520,
> > > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > > >> >> >> > shipping.
> > > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > > >> >> >> > that
> > > > >> >> >> > was
> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > > >> >> >> > discover
> > > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > > >> >> >> > had
> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > > >> >> >> > this
> > > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > > >> >> >> > a
> > > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > > >> >> >> > But
> > > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > > >> >> >> > The
> > > > >> >> >> > original owner of this machine definitely took care of it.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Phil
> > > > >> >> >> > > >
> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > > >> >> >> > > > > to
> > > > >> >> >> > > > > a
> > > > >> >> >> > convenient place for the battery. Upon power up it said
> > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > > >> >> >> > > > > wrong
> > > > >> >> >> > > > > with
> > > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > > >> >> >> > > > > POST
> > > > >> >> >> > and Autoexec.
> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > >> >> >> > > > > Now it boots cleanly.
> > > > >> >> >> > > > > Has Lotus123 on the HD.
> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > > >> >> >> > > > > everything
> > > > >> >> >> > > > > works.
> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > > >> >> >> > > > > RAM,
> > > > >> >> >> > > > > a
> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > >> >> >> > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > > >> >> >> > > > > > X2
> > > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > > >> >> >> > > > > > make sure the rest of it is still good.
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > > >> >> >> > <andrebakken@> wrote:
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > > >> >> >> > > > > > > difference.
> > > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > > >> >> >> > directly
> > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > > >> >> >> > > > > > > will
> > > > >> >> >> > radiate more interference/noise out onto the mains.
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > There are two in there that are the same.
> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > >> >> >> > > > > > > > I have them out already.
> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > DC
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Good Find, DC
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > > >> >> >> > and
> > > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > > >> >> >> > them
> > > > >> >> >> > for you.
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Phil
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > > >> >> >> > > > > > > > > > in
> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > > >> >> >> > replace both
> > > > >> >> >> > > > > > > > > > of course.
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > > >> >> >> > > > > > > > > > > that
> > > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > > >> >> >> > > > > > > > > > > supply
> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > > >> >> >> > (unfortunately,
> > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > > >> >> >> > > > > > > > > > > isolation!)
> > > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > > >> >> >> > > > > > > > > > > manuals
> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > > >> >> >> > > > > > > > > > > pointers
> > > > >> >> >> > form
> > > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > > >> >> >> > > > > > > > > > > dead
> > > > >> >> >> > diagnosis.
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > > >> >> >> > > > > > > > > > > 1530
> > > > >> >> >> > > > > > > > > > > will
> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > > >> >> >> > > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > >
> > > > >> >> >> > >
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > > >> >> >> that
> > > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > > >> >> >> like
> > > > >> >> >> a
> > > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > > >> >> >> and a
> > > > >> >> >> stack? It's been so long since I messed with dos environment
> > > > >> >> >> networking
> > > > >> >> >> I forget.
> > > > >> >> >>
> > > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > > >> >> >> equation,
> > > > >> >> >> but I don' t have any references right now over a dos stack.
> > > > >> >> >>
> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > > >> >> >> better,
> > > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > > >> >> >>
> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > > >> >> >> I'm
> > > > >> >> >> asking for everything here. Objective is to have something that
> > > > >> >> >> could
> > > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > > >> >> >> a
> > > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > > >> >> >>
> > > > >> >> >> jim
> > > > >> >> >> >
> > > > >> >> >> > ,___
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > ------------------------------------
> > > > >> >> >
> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >>
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> > ------------------------------------
> > > > >> >
> > > > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > >
> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
Date: Thu, 18 Oct 2012 02:57:08 -0000
From: "Androgenoide"
Subject: Re: Typical 1500 series failure modes?
Hey! No problem. It will be a couple days but Friday or Saturday I'll break it open and image the disks. If we still have space I'll upload it to the files section... If not, I'm sure they'll fit in an email attachment.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> That's wonderful!
>
> I got my MiniSCSI EPP off ebay, but it didn't have the software at all. I have obtained SCSIworks disks, but I am not sure if those have the same programs. I would like to ontain the software on those disks if possible. Thanks.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Androgenoide" <androgenoide@> wrote:
> >
> > I found one of those in a thrift store just a couple weeks ago... an Adaptec MiniSCSI EPP still in the original box with the envelope of driver disks unopened. Haven't tried to use it yet but, from skimming through the manual, it seems to have some limits on the types of devices it works with.
> >
> >
> >
> >
> >
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
> > >
> > > The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > > > As I might have mentioned in another post, if I could get
> > > > another PC to appear as a mounted drive to the GRiD I'd be in
> > > > real fat city. Then I'd have the machine wide open to the rest of the world.
> > > > Any ideas there?
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >
> > > > > Good luck with the Backpack stuff.
> > > > >
> > > > > There's a book called "Hot Links", which was produced by the same people
> > > > > that produced LapLink. In the back of the book is a disk with programs that
> > > > > will let you transfer files, either via null modem cable or LapLink cable.
> > > > > I doubt that the book is still in print, but it might be something to look
> > > > > for. If you get the book without the disk, let me know, and I'll get you
> > > > > the software. I can't remember if it lets you map the host drive to the
> > > > > client machine, but that would be cool, if it does that.
> > > > >
> > > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > > "She said it was either her or the ham radio. Over."
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "techtalklive@" <doug@>
> > > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > > > Sent: Monday, October 15, 2012 10:47 PM
> > > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >
> > > > >
> > > > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > > > Yes checking out Backpacks now. Just collected drivers from
> > > > > > around the web for them and am checking on ebay for
> > > > > > equipment. I suspect they will work.
> > > > > >
> > > > > > I thought I might take a look to see if there was parallel port
> > > > > > software that would work like "laplink" to tether to another PC
> > > > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > > > the 1530.
> > > > > >
> > > > > > That would be cool... and avoid purchasing old hardware.
> > > > > >
> > > > > >
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > > >>
> > > > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > > > >> you
> > > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > > > >>
> > > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > > >> "She said it was either her or the ham radio. Over."
> > > > > >>
> > > > > >>
> > > > > >> ----- Original Message -----
> > > > > >> From: "techtalklive@" <doug@>
> > > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > > >>
> > > > > >>
> > > > > >> >
> > > > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > > > >> > driver
> > > > > >> > support.
> > > > > >> > Other similar devices don't seem to be on the used market right not.
> > > > > >> > I'm also considering a parallel based disk drive at this point.
> > > > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > > > >> > didn't
> > > > > >> > actually run the numbers.
> > > > > >> > DC
> > > > > >> >
> > > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > > >> >>
> > > > > >> >> I don't think I'd even bother with the serial port. You might get
> > > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > > > >> >> 16550AFN
> > > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > > > >> >> have
> > > > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > > > >> >> parallel
> > > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > > > >> >> even
> > > > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > > > >> >>
> > > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > > >> >> "She said it was either her or the ham radio. Over."
> > > > > >> >>
> > > > > >> >>
> > > > > >> >> ----- Original Message -----
> > > > > >> >> From: "Androgenoide" <androgenoide@>
> > > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > > >> >>
> > > > > >> >>
> > > > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > > > >> >> > Ethernet adapter that will work through either the serial or
> > > > > >> >> > parallel
> > > > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > > > >> >> > the
> > > > > >> >> > time. I've got a serial device server now that would probably work
> > > > > >> >> > too
> > > > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > > > >> >> > to
> > > > > >> >> > see
> > > > > >> >> > what would be required. Either of those solutions would be limited
> > > > > >> >> > by
> > > > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > > > >> >> > speeds
> > > > > >> >> > are out of the question!
> > > > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > > > >> >> > also
> > > > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > > > >> >> > internet
> > > > > >> >> > connection... (if you still have access to a dialup service... if
> > > > > >> >> > not,
> > > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > > > >> >> > few
> > > > > >> >> > hours at a time).
> > > > > >> >> >
> > > > > >> >> > Generally speaking, if an old machine has either a serial or
> > > > > >> >> > parallel
> > > > > >> >> > port
> > > > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > > > >> >> > transfer
> > > > > >> >> > files to another machine. Even if it has no floppy you can use
> > > > > >> >> > another
> > > > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > > > >> >> > lot
> > > > > >> >> > of
> > > > > >> >> > file transfer programs out there, from Kermit to the original
> > > > > >> >> > version
> > > > > >> >> > of
> > > > > >> >> > Procomm that will fit on a single floppy.
> > > > > >> >> >
> > > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > > > >> >> > full
> > > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > > > >> >> > tricky
> > > > > >> >> > and
> > > > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > > > >> >> > kind
> > > > > >> >> > of
> > > > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > > > >> >> > a
> > > > > >> >> > single floppy and run on systems with limited resources
> > > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > > > >> >> > one
> > > > > >> >> > seems to want 4MB of RAM.
> > > > > >> >> >
> > > > > >> >> > There are plenty of people on the web who have too much time on
> > > > > >> >> > their
> > > > > >> >> > hands and are still playing with machines even older than the
> > > > > >> >> > Grid...
> > > > > >> >> > You
> > > > > >> >> > can still buy new after-market accessories for Commodores, for
> > > > > >> >> > example,
> > > > > >> >> > so
> > > > > >> >> > don't assume that there are no new solutions to old problems.
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > > > >> >> >>
> > > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > > > >> >> >> >
> > > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > > > >> >> >> > port
> > > > > >> >> >> > to
> > > > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > > > >> >> >> > made
> > > > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > > > >> >> >> > And,
> > > > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > > > >> >> >> > browser
> > > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > > > >> >> >> > say
> > > > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > > > >> >> >> > Go
> > > > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > > > >> >> >> > a
> > > > > >> >> >> > while.
> > > > > >> >> >> >
> > > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > > > >> >> >> > last
> > > > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > > > >> >> >> > force
> > > > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > > > >> >> >> > unless
> > > > > >> >> >> > it
> > > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > > > >> >> >> > installed
> > > > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > > > >> >> >> > one
> > > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > > > >> >> >> > half
> > > > > >> >> >> > hour to boot.
> > > > > >> >> >> >
> > > > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > > > >> >> >> > else
> > > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > > > >> >> >> > with
> > > > > >> >> >> > a
> > > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > > > >> >> >> > OS/browser
> > > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > > > >> >> >> >
> > > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > > > >> >> >> > <doug@> wrote:
> > > > > >> >> >> > >
> > > > > >> >> >> > > Like the hack job? :O
> > > > > >> >> >> > >
> > > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > > > >> >> >> > > screes?
> > > > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > > > >> >> >> > > fix it?) or look for a replacement?
> > > > > >> >> >> > >
> > > > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > > > >> >> >> > > the point there.
> > > > > >> >> >> > >
> > > > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > > > >> >> >> > > I'd need the LAN hardware I guess.
> > > > > >> >> >> > > Any other ideas?
> > > > > >> >> >> > >
> > > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > > > >> >> >> > > contacts
> > > > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > > > >> >> >> > > metal.
> > > > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > > > >> >> >> > > the
> > > > > >> >> >> > > radial DC jack. Strange?
> > > > > >> >> >> > >
> > > > > >> >> >> > > DC
> > > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > > >> >> >> > <Jeriddian@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Great job, Doug!
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > > > >> >> >> > > > beautiful
> > > > > >> >> >> > machines? And yep, that's the way it works.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > > > >> >> >> > > > registers
> > > > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > > > >> >> >> > the
> > > > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > > > >> >> >> > simply
> > > > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > > > >> >> >> > everything's hunky-dory.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > > > >> >> >> > > > upgrade
> > > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > > > >> >> >> > Great
> > > > > >> >> >> > to
> > > > > >> >> >> > hear the HDD is good too.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > > > >> >> >> > > > that
> > > > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > > > >> >> >> > 1520,
> > > > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > > > >> >> >> > shipping.
> > > > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > > > >> >> >> > that
> > > > > >> >> >> > was
> > > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > > > >> >> >> > discover
> > > > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > > > >> >> >> > had
> > > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > > > >> >> >> > this
> > > > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > > > >> >> >> > a
> > > > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > > > >> >> >> > But
> > > > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > > > >> >> >> > The
> > > > > >> >> >> > original owner of this machine definitely took care of it.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Phil
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > > > >> >> >> > > > > to
> > > > > >> >> >> > > > > a
> > > > > >> >> >> > convenient place for the battery. Upon power up it said
> > > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > > > >> >> >> > > > > wrong
> > > > > >> >> >> > > > > with
> > > > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > > > >> >> >> > > > > POST
> > > > > >> >> >> > and Autoexec.
> > > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > > >> >> >> > > > > Now it boots cleanly.
> > > > > >> >> >> > > > > Has Lotus123 on the HD.
> > > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > > > >> >> >> > > > > everything
> > > > > >> >> >> > > > > works.
> > > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > > > >> >> >> > > > > RAM,
> > > > > >> >> >> > > > > a
> > > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > >
> > > > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > > > >> >> >> > > > > > X2
> > > > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > > > >> >> >> > > > > > make sure the rest of it is still good.
> > > > > >> >> >> > > > > >
> > > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > > > >> >> >> > <andrebakken@> wrote:
> > > > > >> >> >> > > > > > >
> > > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > > > >> >> >> > > > > > > difference.
> > > > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > > > >> >> >> > directly
> > > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > > > >> >> >> > > > > > > will
> > > > > >> >> >> > radiate more interference/noise out onto the mains.
> > > > > >> >> >> > > > > > >
> > > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > > There are two in there that are the same.
> > > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > > >> >> >> > > > > > > > I have them out already.
> > > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > > DC
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > > >> >> >> > <Jeriddian@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > Good Find, DC
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > > > >> >> >> > and
> > > > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > > > >> >> >> > them
> > > > > >> >> >> > for you.
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > Phil
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > > > >> >> >> > > > > > > > > > in
> > > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > > > >> >> >> > replace both
> > > > > >> >> >> > > > > > > > > > of course.
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > DC
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@...m
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > > > >> >> >> > > > > > > > > > > that
> > > > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > > > >> >> >> > > > > > > > > > > supply
> > > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > > > >> >> >> > (unfortunately,
> > > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > > > >> >> >> > > > > > > > > > > isolation!)
> > > > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > > > >> >> >> > > > > > > > > > > manuals
> > > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > > > >> >> >> > > > > > > > > > > pointers
> > > > > >> >> >> > form
> > > > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > > > >> >> >> > > > > > > > > > > dead
> > > > > >> >> >> > diagnosis.
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > > > >> >> >> > > > > > > > > > > 1530
> > > > > >> >> >> > > > > > > > > > > will
> > > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > > > >> >> >> > > > > > > > > > > DC
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > >
> > > > > >> >> >> > > > > >
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > >
> > > > > >> >> >> > >
> > > > > >> >> >> >
> > > > > >> >> >>
> > > > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > > > >> >> >> that
> > > > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > > > >> >> >> like
> > > > > >> >> >> a
> > > > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > > > >> >> >> and a
> > > > > >> >> >> stack? It's been so long since I messed with dos environment
> > > > > >> >> >> networking
> > > > > >> >> >> I forget.
> > > > > >> >> >>
> > > > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > > > >> >> >> equation,
> > > > > >> >> >> but I don' t have any references right now over a dos stack.
> > > > > >> >> >>
> > > > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > > > >> >> >> better,
> > > > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > > > >> >> >>
> > > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > > > >> >> >> I'm
> > > > > >> >> >> asking for everything here. Objective is to have something that
> > > > > >> >> >> could
> > > > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > > > >> >> >> a
> > > > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > > > >> >> >>
> > > > > >> >> >> jim
> > > > > >> >> >> >
> > > > > >> >> >> > ,___
> > > > > >> >> >> >
> > > > > >> >> >>
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> > ------------------------------------
> > > > > >> >> >
> > > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >>
> > > > > >> >
> > > > > >> >
> > > > > >> >
> > > > > >> >
> > > > > >> > ------------------------------------
> > > > > >> >
> > > > > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > > >> >
> > > > > >> >
> > > > > >> >
> > > > > >>
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ------------------------------------
> > > > > >
> > > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Thu, 18 Oct 2012 04:19:51 -0000
From: "techtalklive@..."
Subject: Best GRID 1530 Processor
Revitalizing the 1530 GRiD got me looking into my stash of
old parts. First I found a '387. Put it in, it works.
Then, almost forgetting the 486 history, I found
a TI486DLC. So that's a 486 in 386 pinout with improved
internals and a 1k cache. So that got me thinking, what would
be the best in class 386 replacement...
So far I get that the answer is a TI486SXL-50.
5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
Needs a dos sys file to enable the cache at boot.
Concur?
I don't suppose there is much hope in increasing the clocks
around the MB...
Other optimizing ideas?
Date: Thu, 18 Oct 2012 10:39:13 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset="UTF-8"
If you made the leads long enough to lay the SIMMs over on their side, and insulated them so that they wouldn't short anything out, would you have any lead dress problems, such as EMI/RFI, stray capacitance or inductance, etc.? And, if so, wonder if installing ferrite beads on the leads would help.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: Shawnerz
To: rugrid-laptop@yahoogroups.com
Sent: Wednesday, October 17, 2012 12:52 PM
Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM. Once I soldered the pins on, the module height would not allow the cover to go on.
Your results may vary,
-Shawn
-------- Original message --------
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Well that sounds promising. The only thing that would
top that would be a native SCSI attached to the bus connectors
in the accessory port. A ParPort one would do in the meantime.
Thanks!
I'm thinking of moding some SIMM chips to go in the SIPP sockets.
Anyone know the mem speed? Hate to take the thing apart right
now to find out.
Thanks!
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
>
> The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > As I might have mentioned in another post, if I could get
> > another PC to appear as a mounted drive to the GRiD I'd be in
> > real fat city. Then I'd have the machine wide open to the rest of the world.
> > Any ideas there?
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >
> > > Good luck with the Backpack stuff.
> > >
> > > There's a book called "Hot Links", which was produced by the same people
> > > that produced LapLink. In the back of the book is a disk with programs that
> > > will let you transfer files, either via null modem cable or LapLink cable.
> > > I doubt that the book is still in print, but it might be something to look
> > > for. If you get the book without the disk, let me know, and I'll get you
> > > the software. I can't remember if it lets you map the host drive to the
> > > client machine, but that would be cool, if it does that.
> > >
> > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > "She said it was either her or the ham radio. Over."
> > >
> > >
> > > ----- Original Message -----
> > > From: "techtalklive@" <doug@>
> > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > Sent: Monday, October 15, 2012 10:47 PM
> > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >
> > >
> > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > Yes checking out Backpacks now. Just collected drivers from
> > > > around the web for them and am checking on ebay for
> > > > equipment. I suspect they will work.
> > > >
> > > > I thought I might take a look to see if there was parallel port
> > > > software that would work like "laplink" to tether to another PC
> > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > the 1530.
> > > >
> > > > That would be cool... and avoid purchasing old hardware.
> > > >
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >>
> > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > >> you
> > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > >>
> > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> "She said it was either her or the ham radio. Over."
> > > >>
> > > >>
> > > >> ----- Original Message -----
> > > >> From: "techtalklive@" <doug@>
> > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >>
> > > >>
> > > >> >
> > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > >> > driver
> > > >> > support.
> > > >> > Other similar devices don't seem to be on the used market right not.
> > > >> > I'm also considering a parallel based disk drive at this point.
> > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > >> > didn't
> > > >> > actually run the numbers.
> > > >> > DC
> > > >> >
> > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >> >>
> > > >> >> I don't think I'd even bother with the serial port. You might get
> > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > >> >> 16550AFN
> > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > >> >> have
> > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > >> >> parallel
> > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > >> >> even
> > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > >> >>
> > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > >> >> "She said it was either her or the ham radio. Over."
> > > >> >>
> > > >> >>
> > > >> >> ----- Original Message -----
> > > >> >> From: "Androgenoide" <androgenoide@>
> > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >> >>
> > > >> >>
> > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > >> >> > Ethernet adapter that will work through either the serial or
> > > >> >> > parallel
> > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > >> >> > the
> > > >> >> > time. I've got a serial device server now that would probably work
> > > >> >> > too
> > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > >> >> > to
> > > >> >> > see
> > > >> >> > what would be required. Either of those solutions would be limited
> > > >> >> > by
> > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > >> >> > speeds
> > > >> >> > are out of the question!
> > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > >> >> > also
> > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > >> >> > internet
> > > >> >> > connection... (if you still have access to a dialup service... if
> > > >> >> > not,
> > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > >> >> > few
> > > >> >> > hours at a time).
> > > >> >> >
> > > >> >> > Generally speaking, if an old machine has either a serial or
> > > >> >> > parallel
> > > >> >> > port
> > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > >> >> > transfer
> > > >> >> > files to another machine. Even if it has no floppy you can use
> > > >> >> > another
> > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > >> >> > lot
> > > >> >> > of
> > > >> >> > file transfer programs out there, from Kermit to the original
> > > >> >> > version
> > > >> >> > of
> > > >> >> > Procomm that will fit on a single floppy.
> > > >> >> >
> > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > >> >> > full
> > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > >> >> > tricky
> > > >> >> > and
> > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > >> >> > kind
> > > >> >> > of
> > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > >> >> > a
> > > >> >> > single floppy and run on systems with limited resources
> > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > >> >> > one
> > > >> >> > seems to want 4MB of RAM.
> > > >> >> >
> > > >> >> > There are plenty of people on the web who have too much time on
> > > >> >> > their
> > > >> >> > hands and are still playing with machines even older than the
> > > >> >> > Grid...
> > > >> >> > You
> > > >> >> > can still buy new after-market accessories for Commodores, for
> > > >> >> > example,
> > > >> >> > so
> > > >> >> > don't assume that there are no new solutions to old problems.
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > >> >> >>
> > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > >> >> >> >
> > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > >> >> >> > port
> > > >> >> >> > to
> > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > >> >> >> > made
> > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > >> >> >> > And,
> > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > >> >> >> > browser
> > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > >> >> >> > say
> > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > >> >> >> > Go
> > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > >> >> >> > a
> > > >> >> >> > while.
> > > >> >> >> >
> > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > >> >> >> > last
> > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > >> >> >> > force
> > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > >> >> >> > unless
> > > >> >> >> > it
> > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > >> >> >> > installed
> > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > >> >> >> > one
> > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > >> >> >> > half
> > > >> >> >> > hour to boot.
> > > >> >> >> >
> > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > >> >> >> > else
> > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > >> >> >> > with
> > > >> >> >> > a
> > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > >> >> >> > OS/browser
> > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > >> >> >> >
> > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > >> >> >> > <doug@> wrote:
> > > >> >> >> > >
> > > >> >> >> > > Like the hack job? :O
> > > >> >> >> > >
> > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > >> >> >> > > screes?
> > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > >> >> >> > > fix it?) or look for a replacement?
> > > >> >> >> > >
> > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > >> >> >> > > the point there.
> > > >> >> >> > >
> > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > >> >> >> > > I'd need the LAN hardware I guess.
> > > >> >> >> > > Any other ideas?
> > > >> >> >> > >
> > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > >> >> >> > > contacts
> > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > >> >> >> > > metal.
> > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > >> >> >> > > the
> > > >> >> >> > > radial DC jack. Strange?
> > > >> >> >> > >
> > > >> >> >> > > DC
> > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > >
> > > >> >> >> > > > Great job, Doug!
> > > >> >> >> > > >
> > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > >> >> >> > > > beautiful
> > > >> >> >> > machines? And yep, that's the way it works.
> > > >> >> >> > > >
> > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > >> >> >> > > > registers
> > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > >> >> >> > the
> > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > >> >> >> > simply
> > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > >> >> >> > everything's hunky-dory.
> > > >> >> >> > > >
> > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > >> >> >> > > > upgrade
> > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > >> >> >> > Great
> > > >> >> >> > to
> > > >> >> >> > hear the HDD is good too.
> > > >> >> >> > > >
> > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > >> >> >> > > > that
> > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > >> >> >> > 1520,
> > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > >> >> >> > shipping.
> > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > >> >> >> > that
> > > >> >> >> > was
> > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > >> >> >> > discover
> > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > >> >> >> > had
> > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > >> >> >> > this
> > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > >> >> >> > a
> > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > >> >> >> > But
> > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > >> >> >> > The
> > > >> >> >> > original owner of this machine definitely took care of it.
> > > >> >> >> > > >
> > > >> >> >> > > > Phil
> > > >> >> >> > > >
> > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > >
> > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > >> >> >> > > > > to
> > > >> >> >> > > > > a
> > > >> >> >> > convenient place for the battery. Upon power up it said
> > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > >> >> >> > > > > wrong
> > > >> >> >> > > > > with
> > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > >> >> >> > > > > POST
> > > >> >> >> > and Autoexec.
> > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > >> >> >> > > > > Now it boots cleanly.
> > > >> >> >> > > > > Has Lotus123 on the HD.
> > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > >> >> >> > > > > everything
> > > >> >> >> > > > > works.
> > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > >> >> >> > > > > RAM,
> > > >> >> >> > > > > a
> > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > >> >> >> > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > >> >> >> > > > > > X2
> > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > >> >> >> > > > > > make sure the rest of it is still good.
> > > >> >> >> > > > > >
> > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > >> >> >> > <andrebakken@> wrote:
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > >> >> >> > > > > > > difference.
> > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > >> >> >> > directly
> > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > >> >> >> > > > > > > will
> > > >> >> >> > radiate more interference/noise out onto the mains.
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > There are two in there that are the same.
> > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > >> >> >> > > > > > > > I have them out already.
> > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > DC
> > > >> >> >> > > > > ; > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > >> >> >> > <Jeriddian@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Good Find, DC
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > >> >> >> > and
> > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > >> >> >> > them
> > > >> >> >> > for you.
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > Phil
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > >> >> >> > > > > > > > > > in
> > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > >> >> >> > replace both
> > > >> >> >> > > > > > > > > > of course.
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > DC
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > >> >> >> > wrote:
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > >> >> >> > > > > > > > > > > that
> > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > >> >> >> > > > > > > > > > > supply
> > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > >> >> >> > (unfortunately,
> > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > >> >> >> > > > > > > > > > > isolation!)
> > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > >> >> >> > > > > > > > > > > manuals
> > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > >> >> >> > > > > > > > > > > pointers
> > > >> >> >> > form
> > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > >> >> >> > > > > > > > > > > dead
> > > >> >> >> > diagnosis.
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > >> >> >> > > > > > > > > > > 1530
> > > >> >> >> > > > > > > > > > > will
> > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > >> >> >> > > > > > > > > > > DC
> > > >> >> >> > > > > > > > > > >
> > > >> >> >> > > > > > > > > >
> > > >> >> >> > > > > > > > >
> > > >> >> >> > > > > > > >
> > > >> >> >> > > > > > >
> > > >> >> >> > > > > >
> > > >> >> >> > > > >
> > > >> >> >> > > >
> > > >> >> >> > >
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > >> >> >> that
> > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > >> >> >> like
> > > >> >> >> a
> > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > >> >> >> and a
> > > >> >> >> stack? It's been so long since I messed with dos environment
> > > >> >> >> networking
> > > >> >> >> I forget.
> > > >> >> >>
> > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > >> >> >> equation,
> > > >> >> >> but I don' t have any references right now over a dos stack.
> > > >> >> >>
> > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > >> >> >> better,
> > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > >> >> >>
> > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > >> >> >> I'm
> > > >> >> >> asking for everything here. Objective is to have something that
> > > >> >> >> could
> > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > >> >> >> a
> > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > >> >> >>
> > > >> >> >> jim
> > > >> >> >> >
> > > >> >> >> > ,___
> > > >> >> >> >
> > > >> >> >>
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >> > ------------------------------------
> > > >> >> >
> > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >> >
> > > >> >> >
> > > >> >> >
> > > >> >>
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > ------------------------------------
> > > >> >
> gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >> >
> > > >> >
> > > >> >
> > > >>
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> >
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
Date: Fri, 19 Oct 2012 00:38:36 -0000
From: "Androgenoide"
Subject: Re: Typical 1500 series failure modes?
Grabbed a free moment and opened the driver disk envelope... It looks like it may be the same SCSIworks that you already have but... I made self-extracting images of the two floppies, zipped them and uploaded them to the files section.
The manual looks like 162 pages, though, and I won't get around to scanning that right away.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> That's wonderful!
>
> I got my MiniSCSI EPP off ebay, but it didn't have the software at all. I have obtained SCSIworks disks, but I am not sure if those have the same programs. I would like to ontain the software on those disks if possible. Thanks.
>
> Phil
Date: Fri, 19 Oct 2012 01:36:02 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Thanks so much, A
Much appreciated! I can wait on the manual for now.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Androgenoide" <androgenoide@...> wrote:
>
> Grabbed a free moment and opened the driver disk envelope... It looks like it may be the same SCSIworks that you already have but... I made self-extracting images of the two floppies, zipped them and uploaded them to the files section.
> The manual looks like 162 pages, though, and I won't get around to scanning that right away.
>
>
>
>
>
>
>
>
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > That's wonderful!
> >
> > I got my MiniSCSI EPP off ebay, but it didn't have the software at all. I have obtained SCSIworks disks, but I am not sure if those have the same programs. I would like to ontain the software on those disks if possible. Thanks.
> >
> > Phil
>
Date: Fri, 19 Oct 2012 01:41:38 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
There was a company that at one time made an adaptation for the GRiD's called paradox in which they made an adapter that fit into the pin slots (I think. I've never actually seen it, but this is what I heard) and into which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for this, but never found it. That would be cool to find and use.
The problems with the memory adaptation is ther is very, very little room for the memory to fit. The MoBo was actually designed to fit the smallest RAM stick they made at the time. You have to use a low profile SIPP, one with no extra PC Board material off to the sides. You could try laying the wired SIMM's over, but I looked at trying to do that with high profile SIPP's and there really isn't any room to do that either. I think if someone coud come up with an adapter like the paradox I described that fit 2 4 MB sticks to run in the eight rows of holes, that would likely be the best answer.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> If you made the leads long enough to lay the SIMMs over on their side, and insulated them so that they wouldn't short anything out, would you have any lead dress problems, such as EMI/RFI, stray capacitance or inductance, etc.? And, if so, wonder if installing ferrite beads on the leads would help.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: Shawnerz
> To: rugrid-laptop@yahoogroups.com
> Sent: Wednesday, October 17, 2012 12:52 PM
> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
>
>
> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM. Once I soldered the pins on, the module height would not allow the cover to go on.
> Your results may vary,
> -Shawn
>
>
>
> -------- Original message --------
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> From: "techtalklive@..." <doug@...>
> To: RuGRiD-Laptop@yahoogroups.com
> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
>
>
> Well that sounds promising. The only thing that would
> top that would be a native SCSI attached to the bus connectors
> in the accessory port. A ParPort one would do in the meantime.
> Thanks!
>
> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> Anyone know the mem speed? Hate to take the thing apart right
> now to find out.
> Thanks!
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
> >
> > The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > > As I might have mentioned in another post, if I could get
> > > another PC to appear as a mounted drive to the GRiD I'd be in
> > > real fat city. Then I'd have the machine wide open to the rest of the world.
> > > Any ideas there?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > >
> > > > Good luck with the Backpack stuff.
> > > >
> > > > There's a book called "Hot Links", which was produced by the same people
> > > > that produced LapLink. In the back of the book is a disk with programs that
> > > > will let you transfer files, either via null modem cable or LapLink cable.
> > > > I doubt that the book is still in print, but it might be something to look
> > > > for. If you get the book without the disk, let me know, and I'll get you
> > > > the software. I can't remember if it lets you map the host drive to the
> > > > client machine, but that would be cool, if it does that.
> > > >
> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > "She said it was either her or the ham radio. Over."
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "techtalklive@" <doug@>
> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > > Sent: Monday, October 15, 2012 10:47 PM
> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > >
> > > >
> > > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > > Yes checking out Backpacks now. Just collected drivers from
> > > > > around the web for them and am checking on ebay for
> > > > > equipment. I suspect they will work.
> > > > >
> > > > > I thought I might take a look to see if there was parallel port
> > > > > software that would work like "laplink" to tether to another PC
> > > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > > the 1530.
> > > > >
> > > > > That would be cool... and avoid purchasing old hardware.
> > > > >
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >>
> > > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > > >> you
> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > > >>
> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> "She said it was either her or the ham radio. Over."
> > > > >>
> > > > >>
> > > > >> ----- Original Message -----
> > > > >> From: "techtalklive@" <doug@>
> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >>
> > > > >>
> > > > >> >
> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > > >> > driver
> > > > >> > support.
> > > > >> > Other similar devices don't seem to be on the used market right not.
> > > > >> > I'm also considering a parallel based disk drive at this point.
> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > > >> > didn't
> > > > >> > actually run the numbers.
> > > > >> > DC
> > > > >> >
> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >> >>
> > > > >> >> I don't think I'd even bother with the serial port. You might get
> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > > >> >> 16550AFN
> > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > > >> >> have
> > > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > > >> >> parallel
> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > > >> >> even
> > > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > > >> >>
> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > >> >> "She said it was either her or the ham radio. Over."
> > > > >> >>
> > > > >> >>
> > > > >> >> ----- Original Message -----
> > > > >> >> From: "Androgenoide" <androgenoide@>
> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >> >>
> > > > >> >>
> > > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > > >> >> > Ethernet adapter that will work through either the serial or
> > > > >> >> > parallel
> > > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > > >> >> > the
> > > > >> >> > time. I've got a serial device server now that would probably work
> > > > >> >> > too
> > > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > > >> >> > to
> > > > >> >> > see
> > > > >> >> > what would be required. Either of those solutions would be limited
> > > > >> >> > by
> > > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > > >> >> > speeds
> > > > >> >> > are out of the question!
> > > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > > >> >> > also
> > > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > > >> >> > internet
> > > > >> >> > connection... (if you still have access to a dialup service... if
> > > > >> >> > not,
> > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > > >> >> > few
> > > > >> >> > hours at a time).
> > > > >> >> >
> > > > >> >> > Generally speaking, if an old machine has either a serial or
> > > > >> >> > parallel
> > > > >> >> > port
> > > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > > >> >> > transfer
> > > > >> >> > files to another machine. Even if it has no floppy you can use
> > > > >> >> > another
> > > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > > >> >> > lot
> > > > >> >> > of
> > > > >> >> > file transfer programs out there, from Kermit to the original
> > > > >> >> > version
> > > > >> >> > of
> > > > >> >> > Procomm that will fit on a single floppy.
> > > > >> >> >
> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > > >> >> > full
> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > > >> >> > tricky
> > > > >> >> > and
> > > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > > >> >> > kind
> > > > >> >> > of
> > > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > > >> >> > a
> > > > >> >> > single floppy and run on systems with limited resources
> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > > >> >> > one
> > > > >> >> > seems to want 4MB of RAM.
> > > > >> >> >
> > > > >> >> > There are plenty of people on the web who have too much time on
> > > > >> >> > their
> > > > >> >> > hands and are still playing with machines even older than the
> > > > >> >> > Grid...
> > > > >> >> > You
> > > > >> >> > can still buy new after-market accessories for Commodores, for
> > > > >> >> > example,
> > > > >> >> > so
> > > > >> >> > don't assume that there are no new solutions to old problems.
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > > >> >> >>
> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > > >> >> >> >
> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > > >> >> >> > port
> > > > >> >> >> > to
> > > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > > >> >> >> > made
> > > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > > >> >> >> > And,
> > > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > > >> >> >> > browser
> > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > > >> >> >> > say
> > > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > > >> >> >> > Go
> > > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > > >> >> >> > a
> > > > >> >> >> > while.
> > > > >> >> >> >
> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > > >> >> >> > last
> > > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > > >> >> >> > force
> > > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > > >> >> >> > unless
> > > > >> >> >> > it
> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > > >> >> >> > installed
> > > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > > >> >> >> > one
> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > > >> >> >> > half
> > > > >> >> >> > hour to boot.
> > > > >> >> >> >
> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > > >> >> >> > else
> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > > >> >> >> > with
> > > > >> >> >> > a
> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > > >> >> >> > OS/browser
> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > > >> >> >> >
> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > > >> >> >> > <doug@> wrote:
> > > > >> >> >> > >
> > > > >> >> >> > > Like the hack job? :O
> > > > >> >> >> > >
> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > > >> >> >> > > screes?
> > > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > > >> >> >> > > fix it?) or look for a replacement?
> > > > >> >> >> > >
> > > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > > >> >> >> > > the point there.
> > > > >> >> >> > >
> > > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > > >> >> >> > > I'd need the LAN hardware I guess.
> > > > >> >> >> > > Any other ideas?
> > > > >> >> >> > >
> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > > >> >> >> > > contacts
> > > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > > >> >> >> > > metal.
> > > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > > >> >> >> > > the
> > > > >> >> >> > > radial DC jack. Strange?
> > > > >> >> >> > >
> > > > >> >> >> > > DC
> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > >
> > > > >> >> >> > > > Great job, Doug!
> > > > >> >> >> > > >
> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > > >> >> >> > > > beautiful
> > > > >> >> >> > machines? And yep, that's the way it works.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > > >> >> >> > > > registers
> > > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > > >> >> >> > the
> > > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > > >> >> >> > simply
> > > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > > >> >> >> > everything's hunky-dory.
> > > > >> >> >> > > >
> > > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > > >> >> >> > > > upgrade
> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > > >> >> >> > Great
> > > > >> >> >> > to
> > > > >> >> >> > hear the HDD is good too.
> > > > >> >> >> > > >
> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > > >> >> >> > > > that
> > > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > > >> >> >> > 1520,
> > > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > > >> >> >> > shipping.
> > > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > > >> >> >> > that
> > > > >> >> >> > was
> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > > >> >> >> > discover
> > > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > > >> >> >> > had
> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > > >> >> >> > this
> > > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > > >> >> >> > a
> > > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > > >> >> >> > But
> > > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > > >> >> >> > The
> > > > >> >> >> > original owner of this machine definitely took care of it.
> > > > >> >> >> > > >
> > > > >> >> >> > > > Phil
> > > > >> >> >> > > >
> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > > >> >> >> > > > > to
> > > > >> >> >> > > > > a
> > > > >> >> >> > convenient place for the battery. Upon power up it said
> > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > > >> >> >> > > > > wrong
> > > > >> >> >> > > > > with
> > > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > > >> >> >> > > > > POST
> > > > >> >> >> > and Autoexec.
> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > >> >> >> > > > > Now it boots cleanly.
> > > > >> >> >> > > > > Has Lotus123 on the HD.
> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > > >> >> >> > > > > everything
> > > > >> >> >> > > > > works.
> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > > >> >> >> > > > > RAM,
> > > > >> >> >> > > > > a
> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > >> >> >> > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > > >> >> >> > > > > > X2
> > > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > > >> >> >> > > > > > make sure the rest of it is still good.
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > > >> >> >> > <andrebakken@> wrote:
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > > >> >> >> > > > > > > difference.
> > > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > > >> >> >> > directly
> > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > > >> >> >> > > > > > > will
> > > > >> >> >> > radiate more interference/noise out onto the mains.
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > There are two in there that are the same.
> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > >> >> >> > > > > > > > I have them out already.
> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > DC
> > > > >> >> >> > > > > ; > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > >> >> >> > <Jeriddian@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Good Find, DC
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > > >> >> >> > and
> > > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > > >> >> >> > them
> > > > >> >> >> > for you.
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > Phil
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > > >> >> >> > > > > > > > > > in
> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > > >> >> >> > replace both
> > > > >> >> >> > > > > > > > > > of course.
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > >> >> >> > wrote:
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > > >> >> >> > > > > > > > > > > that
> > > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > > >> >> >> > > > > > > > > > > supply
> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > > >> >> >> > (unfortunately,
> > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > > >> >> >> > > > > > > > > > > isolation!)
> > > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > > >> >> >> > > > > > > > > > > manuals
> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > > >> >> >> > > > > > > > > > > pointers
> > > > >> >> >> > form
> > > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > > >> >> >> > > > > > > > > > > dead
> > > > >> >> >> > diagnosis.
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > > >> >> >> > > > > > > > > > > 1530
> > > > >> >> >> > > > > > > > > > > will
> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > > >> >> >> > > > > > > > > > > DC
> > > > >> >> >> > > > > > > > > > >
> > > > >> >> >> > > > > > > > > >
> > > > >> >> >> > > > > > > > >
> > > > >> >> >> > > > > > > >
> > > > >> >> >> > > > > > >
> > > > >> >> >> > > > > >
> > > > >> >> >> > > > >
> > > > >> >> >> > > >
> > > > >> >> >> > >
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > > >> >> >> that
> > > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > > >> >> >> like
> > > > >> >> >> a
> > > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > > >> >> >> and a
> > > > >> >> >> stack? It's been so long since I messed with dos environment
> > > > >> >> >> networking
> > > > >> >> >> I forget.
> > > > >> >> >>
> > > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > > >> >> >> equation,
> > > > >> >> >> but I don' t have any references right now over a dos stack.
> > > > >> >> >>
> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > > >> >> >> better,
> > > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > > >> >> >>
> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > > >> >> >> I'm
> > > > >> >> >> asking for everything here. Objective is to have something that
> > > > >> >> >> could
> > > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > > >> >> >> a
> > > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > > >> >> >>
> > > > >> >> >> jim
> > > > >> >> >> >
> > > > >> >> >> > ,___
> > > > >> >> >> >
> > > > >> >> >>
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >> > ------------------------------------
> > > > >> >> >
> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >> >
> > > > >> >> >
> > > > >> >> >
> > > > >> >>
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> > ------------------------------------
> > > > >> >
> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > >
> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
Date: Fri, 19 Oct 2012 05:16:21 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
I appreciate all the thoughts and experience on this.
The heads up on the dimensions will help me avoid buying
RAM, if I do, that might be too large.
I'll be taking mine apart again soon to have a careful
look at this. I'll find those SIMM sockets I saw somewhere
and post a picture. Maybe get some dimmensions and see if
the SIMM socket + module height fits the available height.
And look for the adapter you are talking about... but that's
a long shot.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> There was a company that at one time made an adaptation for the GRiD's called paradox in which they made an adapter that fit into the pin slots (I think. I've never actually seen it, but this is what I heard) and into which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for this, but never found it. That would be cool to find and use.
>
> The problems with the memory adaptation is ther is very, very little room for the memory to fit. The MoBo was actually designed to fit the smallest RAM stick they made at the time. You have to use a low profile SIPP, one with no extra PC Board material off to the sides. You could try laying the wired SIMM's over, but I looked at trying to do that with high profile SIPP's and there really isn't any room to do that either. I think if someone coud come up with an adapter like the paradox I described that fit 2 4 MB sticks to run in the eight rows of holes, that would likely be the best answer.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >
> > If you made the leads long enough to lay the SIMMs over on their side, and insulated them so that they wouldn't short anything out, would you have any lead dress problems, such as EMI/RFI, stray capacitance or inductance, etc.? And, if so, wonder if installing ferrite beads on the leads would help.
> >
> > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > "She said it was either her or the ham radio. Over."
> >
> >
> > ----- Original Message -----
> > From: Shawnerz
> > To: rugrid-laptop@yahoogroups.com
> > Sent: Wednesday, October 17, 2012 12:52 PM
> > Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >
> >
> >
> >
> > IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM. Once I soldered the pins on, the module height would not allow the cover to go on.
> > Your results may vary,
> > -Shawn
> >
> >
> >
> > -------- Original message --------
> > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > From: "techtalklive@" <doug@>
> > To: RuGRiD-Laptop@yahoogroups.com
> > CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >
> >
> >
> >
> > Well that sounds promising. The only thing that would
> > top that would be a native SCSI attached to the bus connectors
> > in the accessory port. A ParPort one would do in the meantime.
> > Thanks!
> >
> > I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> > Anyone know the mem speed? Hate to take the thing apart right
> > now to find out.
> > Thanks!
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo clocked down to 12.5 MHz.
> > >
> > > The problem with trying to access a higher capacity drive from the parallel port is that DOS is not capable of handling a large number of addresses. Of course, SCSI then is an option in doing that. I have a portable SCSI device which hooks into the parallel port made by Adaptec, called the Mini-SCSI which will allow the computer to connect to a larger drive such as a CDROM, large HDD, ZIP drive, or similar device by a SCSI-II connection. The SCSI connector has a parallel port on it that allows you to throughput a connection to your printer. I think that the maximum HDD capacity I can use with this thing is 2T.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > I used to have all that stuff. Today I think I can run a dos program on the GRiD that talks to my trusty TotalCommander on another PC.
> > > > As I might have mentioned in another post, if I could get
> > > > another PC to appear as a mounted drive to the GRiD I'd be in
> > > > real fat city. Then I'd have the machine wide open to the rest of the world.
> > > > Any ideas there?
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > >
> > > > > Good luck with the Backpack stuff.
> > > > >
> > > > > There's a book called "Hot Links", which was produced by the same people
> > > > > that produced LapLink. In the back of the book is a disk with programs that
> > > > > will let you transfer files, either via null modem cable or LapLink cable.
> > > > > I doubt that the book is still in print, but it might be something to look
> > > > > for. If you get the book without the disk, let me know, and I'll get you
> > > > > the software. I can't remember if it lets you map the host drive to the
> > > > > client machine, but that would be cool, if it does that.
> > > > >
> > > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > > "She said it was either her or the ham radio. Over."
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "techtalklive@" <doug@>
> > > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > > > > Sent: Monday, October 15, 2012 10:47 PM
> > > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > >
> > > > >
> > > > > > Its a 1530... clock is... I dont know 20Mhz?
> > > > > > Yes checking out Backpacks now. Just collected drivers from
> > > > > > around the web for them and am checking on ebay for
> > > > > > equipment. I suspect they will work.
> > > > > >
> > > > > > I thought I might take a look to see if there was parallel port
> > > > > > software that would work like "laplink" to tether to another PC
> > > > > > but would make a directory/drive on the the host PC appear as a drive to
> > > > > > the 1530.
> > > > > >
> > > > > > That would be cool... and avoid purchasing old hardware.
> > > > > >
> > > > > >
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > > >>
> > > > > >> What's the bus clock of the 1520, for example? If it's 10MHz, it *might*
> > > > > >> make it, but it would be breathing hard. As for parallel drives, see if
> > > > > >> you
> > > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that works off
> > > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > > > > >>
> > > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > > >> "She said it was either her or the ham radio. Over."
> > > > > >>
> > > > > >>
> > > > > >> ----- Original Message -----
> > > > > >> From: "techtalklive@" <doug@>
> > > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > > >>
> > > > > >>
> > > > > >> >
> > > > > >> > Agreed! The Xircom Parallel port 10bT is available but has limited
> > > > > >> > driver
> > > > > >> > support.
> > > > > >> > Other similar devices don't seem to be on the used market right not.
> > > > > >> > I'm also considering a parallel based disk drive at this point.
> > > > > >> > Yes, ISA itself would have a hard time saturating 10bT I think... I
> > > > > >> > didn't
> > > > > >> > actually run the numbers.
> > > > > >> > DC
> > > > > >> >
> > > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > > > > >> >>
> > > > > >> >> I don't think I'd even bother with the serial port. You might get
> > > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but even a
> > > > > >> >> 16550AFN
> > > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450 UART, you
> > > > > >> >> have
> > > > > >> >> to slow it down with CTS/RTS handshaking. I think the standard
> > > > > >> >> parallel
> > > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad faster with
> > > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a GRiD, but
> > > > > >> >> even
> > > > > >> >> if you could directly tie in to the ISA bus, it would be tough.
> > > > > >> >>
> > > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > > > > >> >> "She said it was either her or the ham radio. Over."
> > > > > >> >>
> > > > > >> >>
> > > > > >> >> ----- Original Message -----
> > > > > >> >> From: "Androgenoide" <androgenoide@>
> > > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > > > > >> >>
> > > > > >> >>
> > > > > >> >> > The only real obstacle to DOS networking with the Grid is finding an
> > > > > >> >> > Ethernet adapter that will work through either the serial or
> > > > > >> >> > parallel
> > > > > >> >> > ports. I used the Xircom on the parallel port because I had one at
> > > > > >> >> > the
> > > > > >> >> > time. I've got a serial device server now that would probably work
> > > > > >> >> > too
> > > > > >> >> > but I've got too much going on at the moment to dig out a Grid just
> > > > > >> >> > to
> > > > > >> >> > see
> > > > > >> >> > what would be required. Either of those solutions would be limited
> > > > > >> >> > by
> > > > > >> >> > the speed of the ports(and the Grid itself), of course. Gigabit
> > > > > >> >> > speeds
> > > > > >> >> > are out of the question!
> > > > > >> >> > Another thought... The guy who put together the Techworm boot disk
> > > > > >> >> > also
> > > > > >> >> > had one called Networm, a single floppy that could do a dialup
> > > > > >> >> > internet
> > > > > >> >> > connection... (if you still have access to a dialup service... if
> > > > > >> >> > not,
> > > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy just a
> > > > > >> >> > few
> > > > > >> >> > hours at a time).
> > > > > >> >> >
> > > > > >> >> > Generally speaking, if an old machine has either a serial or
> > > > > >> >> > parallel
> > > > > >> >> > port
> > > > > >> >> > and you can get it to boot into DOS, there is always a way to
> > > > > >> >> > transfer
> > > > > >> >> > files to another machine. Even if it has no floppy you can use
> > > > > >> >> > another
> > > > > >> >> > DOS machine running Laplink. If it does have a floppy there are a
> > > > > >> >> > lot
> > > > > >> >> > of
> > > > > >> >> > file transfer programs out there, from Kermit to the original
> > > > > >> >> > version
> > > > > >> >> > of
> > > > > >> >> > Procomm that will fit on a single floppy.
> > > > > >> >> >
> > > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of RAM... a
> > > > > >> >> > full
> > > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would be
> > > > > >> >> > tricky
> > > > > >> >> > and
> > > > > >> >> > would require some hardware tweaks even to make a slow machine...
> > > > > >> >> > kind
> > > > > >> >> > of
> > > > > >> >> > an extreme project. I've heard of a Linux distro that will fit on
> > > > > >> >> > a
> > > > > >> >> > single floppy and run on systems with limited resources
> > > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but even that
> > > > > >> >> > one
> > > > > >> >> > seems to want 4MB of RAM.
> > > > > >> >> >
> > > > > >> >> > There are plenty of people on the web who have too much time on
> > > > > >> >> > their
> > > > > >> >> > hands and are still playing with machines even older than the
> > > > > >> >> > Grid...
> > > > > >> >> > You
> > > > > >> >> > can still buy new after-market accessories for Commodores, for
> > > > > >> >> > example,
> > > > > >> >> > so
> > > > > >> >> > don't assume that there are no new solutions to old problems.
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> > > > > >> >> >>
> > > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > > > > >> >> >> >
> > > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the parallel
> > > > > >> >> >> > port
> > > > > >> >> >> > to
> > > > > >> >> >> > a NIC... although I've been wondering lately if it might not have
> > > > > >> >> >> > made
> > > > > >> >> >> > equally good sense to use a device server on the serial port...?
> > > > > >> >> >> > And,
> > > > > >> >> >> > of course, the Arachne browser... not many choices for a DOS
> > > > > >> >> >> > browser
> > > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll have to
> > > > > >> >> >> > say
> > > > > >> >> >> > that it gave a whole new dimension of meaning to the word "slow."
> > > > > >> >> >> > Go
> > > > > >> >> >> > ahead, make a pot of tea while it's loading that page, it will be
> > > > > >> >> >> > a
> > > > > >> >> >> > while.
> > > > > >> >> >> >
> > > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a web page
> > > > > >> >> >> > last
> > > > > >> >> >> > week of a guy who was competing with a friend to see who could
> > > > > >> >> >> > force
> > > > > >> >> >> > Windows XP to run with the least resources. It won't install
> > > > > >> >> >> > unless
> > > > > >> >> >> > it
> > > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but, once
> > > > > >> >> >> > installed
> > > > > >> >> >> > you can remove RAM and underclock the machine... He said he got
> > > > > >> >> >> > one
> > > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and it took a
> > > > > >> >> >> > half
> > > > > >> >> >> > hour to boot.
> > > > > >> >> >> >
> > > > > >> >> >> > I scored an HP 95LX a while back and someday, when I have nothing
> > > > > >> >> >> > else
> > > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get online
> > > > > >> >> >> > with
> > > > > >> >> >> > a
> > > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that Contiki
> > > > > >> >> >> > OS/browser
> > > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > > > > >> >> >> >
> > > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@"
> > > > > >> >> >> > <doug@> wrote:
> > > > > >> >> >> > >
> > > > > >> >> >> > > Like the hack job? :O
> > > > > >> >> >> > >
> > > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone swapped
> > > > > >> >> >> > > screes?
> > > > > >> >> >> > > Should I take the kbd apart and clean it (will that likely
> > > > > >> >> >> > > fix it?) or look for a replacement?
> > > > > >> >> >> > >
> > > > > >> >> >> > > So what can I do with this thing if I put more mem in it?
> > > > > >> >> >> > > Its all accessed funky through expaned mem methods, isn't it?
> > > > > >> >> >> > > I have a coprocessor I could put in this but not sure of
> > > > > >> >> >> > > the point there.
> > > > > >> >> >> > >
> > > > > >> >> >> > > I think I might like to accomplish getting it on the web.
> > > > > >> >> >> > > I'd need the LAN hardware I guess.
> > > > > >> >> >> > > Any other ideas?
> > > > > >> >> >> > >
> > > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two contact on
> > > > > >> >> >> > > it that mate inside the cavity. But one of the two spring
> > > > > >> >> >> > > contacts
> > > > > >> >> >> > > inside is "rubberized", so only the one contact hits metal to
> > > > > >> >> >> > > metal.
> > > > > >> >> >> > > So the P.S. only works using the cord to go from the P.S. into
> > > > > >> >> >> > > the
> > > > > >> >> >> > > radial DC jack. Strange?
> > > > > >> >> >> > >
> > > > > >> >> >> > > DC
> > > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > > >> >> >> > <Jeriddian@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Great job, Doug!
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Isn't it nice when you manage to salvage one of these
> > > > > >> >> >> > > > beautiful
> > > > > >> >> >> > machines? And yep, that's the way it works.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Once you restore battery power to the 1287A, the CMOS
> > > > > >> >> >> > > > registers
> > > > > >> >> >> > are again active. It's just that they're filled with nonsense, so
> > > > > >> >> >> > the
> > > > > >> >> >> > computer tells you the clock had stopped (which it did), and
> > > > > >> >> >> > simply
> > > > > >> >> >> > prompts you to reset the time. Once you do that and reboot,
> > > > > >> >> >> > everything's hunky-dory.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > You can probably find some more 256K sticks somewhere and
> > > > > >> >> >> > > > upgrade
> > > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver. 6.22.
> > > > > >> >> >> > Great
> > > > > >> >> >> > to
> > > > > >> >> >> > hear the HDD is good too.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > I recently got a great deal. There was a 1520 on sale on ebay
> > > > > >> >> >> > > > that
> > > > > >> >> >> > I looked at, however it was strange. It was definitely branded a
> > > > > >> >> >> > 1520,
> > > > > >> >> >> > and advertised that way, but the flip up screen said it was a 386
> > > > > >> >> >> > machine. I decided to get it, and it was only about $90 with
> > > > > >> >> >> > shipping.
> > > > > >> >> >> > When I got the machine, I was very excited when it began to post,
> > > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed the
> > > > > >> >> >> > configuration error 02 indicating the CMOS battery was dead. So I
> > > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A model, but
> > > > > >> >> >> > that
> > > > > >> >> >> > was
> > > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a spare.
> > > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off to
> > > > > >> >> >> > discover
> > > > > >> >> >> > that not only was this really a 386 machine (a 1530), but it also
> > > > > >> >> >> > had
> > > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the 1287A and
> > > > > >> >> >> > this
> > > > > >> >> >> > solved the configuration error just fine. But alas, I didn't get
> > > > > >> >> >> > a
> > > > > >> >> >> > triple crown winner here. The Conner drive was definitely dead.
> > > > > >> >> >> > But
> > > > > >> >> >> > heck, getting another HDD is easy compared to the other benefits!
> > > > > >> >> >> > The
> > > > > >> >> >> > original owner of this machine definitely took care of it.
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > Phil
> > > > > >> >> >> > > >
> > > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran the wires
> > > > > >> >> >> > > > > to
> > > > > >> >> >> > > > > a
> > > > > >> >> >> > convenient place for the battery. Upon power up it said
> > > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> > > > > >> >> >> > > > > The "stopped" message threw me, I thought something was
> > > > > >> >> >> > > > > wrong
> > > > > >> >> >> > > > > with
> > > > > >> >> >> > > > > the chip. It took an F1 to continue and went right through
> > > > > >> >> >> > > > > POST
> > > > > >> >> >> > and Autoexec.
> > > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set the RTC.
> > > > > >> >> >> > > > > Now it boots cleanly.
> > > > > >> >> >> > > > > Has Lotus123 on the HD.
> > > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"... page 2!
> > > > > >> >> >> > > > > The only remaining issue is that a few keys on the keyboard
> > > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external kbd
> > > > > >> >> >> > > > > everything
> > > > > >> >> >> > > > > works.
> > > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386 with 1MB
> > > > > >> >> >> > > > > RAM,
> > > > > >> >> >> > > > > a
> > > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin' system!
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > >
> > > > > >> >> >> > > > > > Thanks so much that was great info. I had no idea on the
> > > > > >> >> >> > > > > > X2
> > > > > >> >> >> > > > > > being a rating. May have to try it without them just to
> > > > > >> >> >> > > > > > make sure the rest of it is still good.
> > > > > >> >> >> > > > > >
> > > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "fullsizewagon"
> > > > > >> >> >> > <andrebakken@> wrote:
> > > > > >> >> >> > > > > > >
> > > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a big
> > > > > >> >> >> > > > > > > difference.
> > > > > >> >> >> > The X2 also signifies they're an enhanced type meant to go
> > > > > >> >> >> > directly
> > > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> > > > > >> >> >> > > > > > > The PSU will work without those cap's in place, but
> > > > > >> >> >> > > > > > > will
> > > > > >> >> >> > radiate more interference/noise out onto the mains.
> > > > > >> >> >> > > > > > >
> > > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > > There are two in there that are the same.
> > > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square package.
> > > > > >> >> >> > > > > > > > The bottom is clear so you can see the radial shape.
> > > > > >> >> >> > > > > > > > I have them out already.
> > > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > > DC
> > > > > >> >> >> > > > > ; > >
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > > > > >> >> >> > <Jeriddian@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > Good Find, DC
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > I guess they got burnt to the point where you can't
> > > > > >> >> >> > identify the capcity amount. Could you give me the output voltage
> > > > > >> >> >> > and
> > > > > >> >> >> > amperage? I'll look through my units and see if I can identify
> > > > > >> >> >> > them
> > > > > >> >> >> > for you.
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > Phil
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a failed cap
> > > > > >> >> >> > > > > > > > > > in
> > > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> > > > > >> >> >> > > > > > > > > > There appears to be two of the same caps, would
> > > > > >> >> >> > replace both
> > > > > >> >> >> > > > > > > > > > of course.
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > DC
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "techtalklive@" <doug@>
> > > > > >> >> >> > wrote:
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > > I am considering tackling the repair of a 1530
> > > > > >> >> >> > > > > > > > > > > that
> > > > > >> >> >> > > > > > > > > > > does not respond to the power switch. The power
> > > > > >> >> >> > > > > > > > > > > supply
> > > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its fine
> > > > > >> >> >> > (unfortunately,
> > > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> > > > > >> >> >> > > > > > > > > > > isolation!)
> > > > > >> >> >> > > > > > > > > > > So its something internal. I have the service
> > > > > >> >> >> > > > > > > > > > > manuals
> > > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get some
> > > > > >> >> >> > > > > > > > > > > pointers
> > > > > >> >> >> > form
> > > > > >> >> >> > > > > > > > > > > folks who have already performed cold stone
> > > > > >> >> >> > > > > > > > > > > dead
> > > > > >> >> >> > diagnosis.
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this very clean
> > > > > >> >> >> > > > > > > > > > > 1530
> > > > > >> >> >> > > > > > > > > > > will
> > > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > > > > >> >> >> > > > > > > > > > > DC
> > > > > >> >> >> > > > > > > > > > >
> > > > > >> >> >> > > > > > > > > >
> > > > > >> >> >> > > > > > > > >
> > > > > >> >> >> > > > > > > >
> > > > > >> >> >> > > > > > >
> > > > > >> >> >> > > > > >
> > > > > >> >> >> > > > >
> > > > > >> >> >> > > >
> > > > > >> >> >> > >
> > > > > >> >> >> >
> > > > > >> >> >>
> > > > > >> >> >> Since we are on the topic of TCP does anyone have a formula stashed
> > > > > >> >> >> that
> > > > > >> >> >> can be easily had to run say serial (probably ppp) from something
> > > > > >> >> >> like
> > > > > >> >> >> a
> > > > > >> >> >> small system like the raspberry pi serially to a system with dos
> > > > > >> >> >> and a
> > > > > >> >> >> stack? It's been so long since I messed with dos environment
> > > > > >> >> >> networking
> > > > > >> >> >> I forget.
> > > > > >> >> >>
> > > > > >> >> >> I think windows of some sort had trumpet to handle part of the
> > > > > >> >> >> equation,
> > > > > >> >> >> but I don' t have any references right now over a dos stack.
> > > > > >> >> >>
> > > > > >> >> >> Probably something to do windows 3.1 or win95 / win98 would be
> > > > > >> >> >> better,
> > > > > >> >> >> but I don't know if the hardware here would be up to those os's.
> > > > > >> >> >>
> > > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be nice too.
> > > > > >> >> >> I'm
> > > > > >> >> >> asking for everything here. Objective is to have something that
> > > > > >> >> >> could
> > > > > >> >> >> suck off or load a disk image with a floppy boot. I suspect it was
> > > > > >> >> >> a
> > > > > >> >> >> difficult thing to get going in the day, though, and even wors now.
> > > > > >> >> >>
> > > > > >> >> >> jim
> > > > > >> >> >> >
> > > > > >> >> >> > ,___
> > > > > >> >> >> >
> > > > > >> >> >>
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> > ------------------------------------
> > > > > >> >> >
> > > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >> >
> > > > > >> >>
> > > > > >> >
> > > > > >> >
> > > > > >> >
> > > > > >> >
> > > > > >> > ------------------------------------
> > > > > >> >
> > > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > > >> >
> > > > > >> >
> > > > > >> >
> > > > > >>
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ------------------------------------
> > > > > >
> > > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
>
Date: Fri, 19 Oct 2012 05:34:15 -0000
From: "techtalklive@..."
Subject: Backing up the GRiD!
Added a photo of transferring all the files form the GRiD to a PC.
Not such a great action shot, but its cool that something is
communicating with the GRiD
and I'm getting all the contents safely archived. They are not "as
delivered" contents but
historically interesting none the less.
Date: Fri, 19 Oct 2012 11:44:29 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Wow. And, I suppose if you could find SIPPs from, say, Crucial or Corsair,
they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
printer I owned, and Crucial wanted about a buck and a half a meg. Yeah,
that Paradox adapter would be swell. That may have gone the way of the $50
card that American Megatrends used to make that would plug into any ISA slot
and patch the BIOS so that you could use any size hard drive by any
manufacturer. Lots of good ideas like that, but they just sort of faded
away.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "jeriddian" <Jeriddian@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Thursday, October 18, 2012 9:41 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> There was a company that at one time made an adaptation for the GRiD's
> called paradox in which they made an adapter that fit into the pin slots
> (I think. I've never actually seen it, but this is what I heard) and into
> which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for this,
> but never found it. That would be cool to find and use.
>
> The problems with the memory adaptation is ther is very, very little room
> for the memory to fit. The MoBo was actually designed to fit the smallest
> RAM stick they made at the time. You have to use a low profile SIPP, one
> with no extra PC Board material off to the sides. You could try laying the
> wired SIMM's over, but I looked at trying to do that with high profile
> SIPP's and there really isn't any room to do that either. I think if
> someone coud come up with an adapter like the paradox I described that fit
> 2 4 MB sticks to run in the eight rows of holes, that would likely be the
> best answer.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> If you made the leads long enough to lay the SIMMs over on their side,
>> and insulated them so that they wouldn't short anything out, would you
>> have any lead dress problems, such as EMI/RFI, stray capacitance or
>> inductance, etc.? And, if so, wonder if installing ferrite beads on the
>> leads would help.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: Shawnerz
>> To: rugrid-laptop@yahoogroups.com
>> Sent: Wednesday, October 17, 2012 12:52 PM
>> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>>
>>
>> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM.
>> Once I soldered the pins on, the module height would not allow the cover
>> to go on.
>> Your results may vary,
>> -Shawn
>>
>>
>>
>> -------- Original message --------
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> From: "techtalklive@..." <doug@...>
>> To: RuGRiD-Laptop@yahoogroups.com
>> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>>
>>
>> Well that sounds promising. The only thing that would
>> top that would be a native SCSI attached to the bus connectors
>> in the accessory port. A ParPort one would do in the meantime.
>> Thanks!
>>
>> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
>> Anyone know the mem speed? Hate to take the thing apart right
>> now to find out.
>> Thanks!
>>
>> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
>> >
>> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked
>> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo
>> > clocked down to 12.5 MHz.
>> >
>> > The problem with trying to access a higher capacity drive from the
>> > parallel port is that DOS is not capable of handling a large number of
>> > addresses. Of course, SCSI then is an option in doing that. I have a
>> > portable SCSI device which hooks into the parallel port made by
>> > Adaptec, called the Mini-SCSI which will allow the computer to connect
>> > to a larger drive such as a CDROM, large HDD, ZIP drive, or similar
>> > device by a SCSI-II connection. The SCSI connector has a parallel port
>> > on it that allows you to throughput a connection to your printer. I
>> > think that the maximum HDD capacity I can use with this thing is 2T.
>> >
>> > Phil
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
>> > >
>> > > I used to have all that stuff. Today I think I can run a dos program
>> > > on the GRiD that talks to my trusty TotalCommander on another PC.
>> > > As I might have mentioned in another post, if I could get
>> > > another PC to appear as a mounted drive to the GRiD I'd be in
>> > > real fat city. Then I'd have the machine wide open to the rest of
>> > > the world.
>> > > Any ideas there?
>> > >
>> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> > > wrote:
>> > > >
>> > > > Good luck with the Backpack stuff.
>> > > >
>> > > > There's a book called "Hot Links", which was produced by the same
>> > > > people
>> > > > that produced LapLink. In the back of the book is a disk with
>> > > > programs that
>> > > > will let you transfer files, either via null modem cable or LapLink
>> > > > cable.
>> > > > I doubt that the book is still in print, but it might be something
>> > > > to look
>> > > > for. If you get the book without the disk, let me know, and I'll
>> > > > get you
>> > > > the software. I can't remember if it lets you map the host drive
>> > > > to the
>> > > > client machine, but that would be cool, if it does that.
>> > > >
>> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> > > > "She said it was either her or the ham radio. Over."
>> > > >
>> > > >
>> > > > ----- Original Message -----
>> > > > From: "techtalklive@" <doug@>
>> > > > To: <RuGRiD-Laptop@yahoogroups.com>
>> > > > Sent: Monday, October 15, 2012 10:47 PM
>> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> > > >
>> > > >
>> > > > > Its a 1530... clock is... I dont know 20Mhz?
>> > > > > Yes checking out Backpacks now. Just collected drivers from
>> > > > > around the web for them and am checking on ebay for
>> > > > > equipment. I suspect they will work.
>> > > > >
>> > > > > I thought I might take a look to see if there was parallel port
>> > > > > software that would work like "laplink" to tether to another PC
>> > > > > but would make a directory/drive on the the host PC appear as a
>> > > > > drive to
>> > > > > the 1530.
>> > > > >
>> > > > > That would be cool... and avoid purchasing old hardware.
>> > > > >
>> > > > >
>> > > > >
>> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> > > > > wrote:
>> > > > >>
>> > > > >> What's the bus clock of the 1520, for example? If it's 10MHz,
>> > > > >> it *might*
>> > > > >> make it, but it would be breathing hard. As for parallel
>> > > > >> drives, see if
>> > > > >> you
>> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that
>> > > > >> works off
>> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
>> > > > >>
>> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> > > > >> "She said it was either her or the ham radio. Over."
>> > > > >>
>> > > > >>
>> > > > >> ----- Original Message -----
>> > > > >> From: "techtalklive@" <doug@>
>> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
>> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
>> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> > > > >>
>> > > > >>
>> > > > >> >
>> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has
>> > > > >> > limited
>> > > > >> > driver
>> > > > >> > support.
>> > > > >> > Other similar devices don't seem to be on the used market
>> > > > >> > right not.
>> > > > >> > I'm also considering a parallel based disk drive at this
>> > > > >> > point.
>> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
>> > > > >> > think... I
>> > > > >> > didn't
>> > > > >> > actually run the numbers.
>> > > > >> > DC
>> > > > >> >
>> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
>> > > > >> > <n8euj@> wrote:
>> > > > >> >>
>> > > > >> >> I don't think I'd even bother with the serial port. You
>> > > > >> >> might get
>> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but
>> > > > >> >> even a
>> > > > >> >> 16550AFN
>> > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450
>> > > > >> >> UART, you
>> > > > >> >> have
>> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
>> > > > >> >> standard
>> > > > >> >> parallel
>> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
>> > > > >> >> faster with
>> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a
>> > > > >> >> GRiD, but
>> > > > >> >> even
>> > > > >> >> if you could directly tie in to the ISA bus, it would be
>> > > > >> >> tough.
>> > > > >> >>
>> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> > > > >> >> "She said it was either her or the ham radio. Over."
>> > > > >> >>
>> > > > >> >>
>> > > > >> >> ----- Original Message -----
>> > > > >> >> From: "Androgenoide" <androgenoide@>
>> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
>> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
>> > > > >> >> modes?
>> > > > >> >>
>> > > > >> >>
>> > > > >> >> > The only real obstacle to DOS networking with the Grid is
>> > > > >> >> > finding an
>> > > > >> >> > Ethernet adapter that will work through either the serial
>> > > > >> >> > or
>> > > > >> >> > parallel
>> > > > >> >> > ports. I used the Xircom on the parallel port because I
>> > > > >> >> > had one at
>> > > > >> >> > the
>> > > > >> >> > time. I've got a serial device server now that would
>> > > > >> >> > probably work
>> > > > >> >> > too
>> > > > >> >> > but I've got too much going on at the moment to dig out a
>> > > > >> >> > Grid just
>> > > > >> >> > to
>> > > > >> >> > see
>> > > > >> >> > what would be required. Either of those solutions would
>> > > > >> >> > be limited
>> > > > >> >> > by
>> > > > >> >> > the speed of the ports(and the Grid itself), of course.
>> > > > >> >> > Gigabit
>> > > > >> >> > speeds
>> > > > >> >> > are out of the question!
>> > > > >> >> > Another thought... The guy who put together the Techworm
>> > > > >> >> > boot disk
>> > > > >> >> > also
>> > > > >> >> > had one called Networm, a single floppy that could do a
>> > > > >> >> > dialup
>> > > > >> >> > internet
>> > > > >> >> > connection... (if you still have access to a dialup
>> > > > >> >> > service... if
>> > > > >> >> > not,
>> > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy
>> > > > >> >> > just a
>> > > > >> >> > few
>> > > > >> >> > hours at a time).
>> > > > >> >> >
>> > > > >> >> > Generally speaking, if an old machine has either a serial
>> > > > >> >> > or
>> > > > >> >> > parallel
>> > > > >> >> > port
>> > > > >> >> > and you can get it to boot into DOS, there is always a way
>> > > > >> >> > to
>> > > > >> >> > transfer
>> > > > >> >> > files to another machine. Even if it has no floppy you
>> > > > >> >> > can use
>> > > > >> >> > another
>> > > > >> >> > DOS machine running Laplink. If it does have a floppy
>> > > > >> >> > there are a
>> > > > >> >> > lot
>> > > > >> >> > of
>> > > > >> >> > file transfer programs out there, from Kermit to the
>> > > > >> >> > original
>> > > > >> >> > version
>> > > > >> >> > of
>> > > > >> >> > Procomm that will fit on a single floppy.
>> > > > >> >> >
>> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of
>> > > > >> >> > RAM... a
>> > > > >> >> > full
>> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would
>> > > > >> >> > be
>> > > > >> >> > tricky
>> > > > >> >> > and
>> > > > >> >> > would require some hardware tweaks even to make a slow
>> > > > >> >> > machine...
>> > > > >> >> > kind
>> > > > >> >> > of
>> > > > >> >> > an extreme project. I've heard of a Linux distro that
>> > > > >> >> > will fit on
>> > > > >> >> > a
>> > > > >> >> > single floppy and run on systems with limited resources
>> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but
>> > > > >> >> > even that
>> > > > >> >> > one
>> > > > >> >> > seems to want 4MB of RAM.
>> > > > >> >> >
>> > > > >> >> > There are plenty of people on the web who have too much
>> > > > >> >> > time on
>> > > > >> >> > their
>> > > > >> >> > hands and are still playing with machines even older than
>> > > > >> >> > the
>> > > > >> >> > Grid...
>> > > > >> >> > You
>> > > > >> >> > can still buy new after-market accessories for Commodores,
>> > > > >> >> > for
>> > > > >> >> > example,
>> > > > >> >> > so
>> > > > >> >> > don't assume that there are no new solutions to old
>> > > > >> >> > problems.
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
>> > > > >> >> >>
>> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> > > > >> >> >> >
>> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the
>> > > > >> >> >> > parallel
>> > > > >> >> >> > port
>> > > > >> >> >> > to
>> > > > >> >> >> > a NIC... although I've been wondering lately if it might
>> > > > >> >> >> > not have
>> > > > >> >> >> > made
>> > > > >> >> >> > equally good sense to use a device server on the serial
>> > > > >> >> >> > port...?
>> > > > >> >> >> > And,
>> > > > >> >> >> > of course, the Arachne browser... not many choices for a
>> > > > >> >> >> > DOS
>> > > > >> >> >> > browser
>> > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll
>> > > > >> >> >> > have to
>> > > > >> >> >> > say
>> > > > >> >> >> > that it gave a whole new dimension of meaning to the
>> > > > >> >> >> > word "slow."
>> > > > >> >> >> > Go
>> > > > >> >> >> > ahead, make a pot of tea while it's loading that page,
>> > > > >> >> >> > it will be
>> > > > >> >> >> > a
>> > > > >> >> >> > while.
>> > > > >> >> >> >
>> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a
>> > > > >> >> >> > web page
>> > > > >> >> >> > last
>> > > > >> >> >> > week of a guy who was competing with a friend to see who
>> > > > >> >> >> > could
>> > > > >> >> >> > force
>> > > > >> >> >> > Windows XP to run with the least resources. It won't
>> > > > >> >> >> > install
>> > > > >> >> >> > unless
>> > > > >> >> >> > it
>> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but,
>> > > > >> >> >> > once
>> > > > >> >> >> > installed
>> > > > >> >> >> > you can remove RAM and underclock the machine... He said
>> > > > >> >> >> > he got
>> > > > >> >> >> > one
>> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and
>> > > > >> >> >> > it took a
>> > > > >> >> >> > half
>> > > > >> >> >> > hour to boot.
>> > > > >> >> >> >
>> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I
>> > > > >> >> >> > have nothing
>> > > > >> >> >> > else
>> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get
>> > > > >> >> >> > online
>> > > > >> >> >> > with
>> > > > >> >> >> > a
>> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that
>> > > > >> >> >> > Contiki
>> > > > >> >> >> > OS/browser
>> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
>> > > > >> >> >> >
>> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "techtalklive@"
>> > > > >> >> >> > <doug@> wrote:
>> > > > >> >> >> > >
>> > > > >> >> >> > > Like the hack job? :O
>> > > > >> >> >> > >
>> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone
>> > > > >> >> >> > > swapped
>> > > > >> >> >> > > screes?
>> > > > >> >> >> > > Should I take the kbd apart and clean it (will that
>> > > > >> >> >> > > likely
>> > > > >> >> >> > > fix it?) or look for a replacement?
>> > > > >> >> >> > >
>> > > > >> >> >> > > So what can I do with this thing if I put more mem in
>> > > > >> >> >> > > it?
>> > > > >> >> >> > > Its all accessed funky through expaned mem methods,
>> > > > >> >> >> > > isn't it?
>> > > > >> >> >> > > I have a coprocessor I could put in this but not sure
>> > > > >> >> >> > > of
>> > > > >> >> >> > > the point there.
>> > > > >> >> >> > >
>> > > > >> >> >> > > I think I might like to accomplish getting it on the
>> > > > >> >> >> > > web.
>> > > > >> >> >> > > I'd need the LAN hardware I guess.
>> > > > >> >> >> > > Any other ideas?
>> > > > >> >> >> > >
>> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
>> > > > >> >> >> > > contact on
>> > > > >> >> >> > > it that mate inside the cavity. But one of the two
>> > > > >> >> >> > > spring
>> > > > >> >> >> > > contacts
>> > > > >> >> >> > > inside is "rubberized", so only the one contact hits
>> > > > >> >> >> > > metal to
>> > > > >> >> >> > > metal.
>> > > > >> >> >> > > So the P.S. only works using the cord to go from the
>> > > > >> >> >> > > P.S. into
>> > > > >> >> >> > > the
>> > > > >> >> >> > > radial DC jack. Strange?
>> > > > >> >> >> > >
>> > > > >> >> >> > > DC
>> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> > > > >> >> >> > <Jeriddian@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > Great job, Doug!
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of
>> > > > >> >> >> > > > these
>> > > > >> >> >> > > > beautiful
>> > > > >> >> >> > machines? And yep, that's the way it works.
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > Once you restore battery power to the 1287A, the
>> > > > >> >> >> > > > CMOS
>> > > > >> >> >> > > > registers
>> > > > >> >> >> > are again active. It's just that they're filled with
>> > > > >> >> >> > nonsense, so
>> > > > >> >> >> > the
>> > > > >> >> >> > computer tells you the clock had stopped (which it did),
>> > > > >> >> >> > and
>> > > > >> >> >> > simply
>> > > > >> >> >> > prompts you to reset the time. Once you do that and
>> > > > >> >> >> > reboot,
>> > > > >> >> >> > everything's hunky-dory.
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > You can probably find some more 256K sticks
>> > > > >> >> >> > > > somewhere and
>> > > > >> >> >> > > > upgrade
>> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver.
>> > > > >> >> >> > 6.22.
>> > > > >> >> >> > Great
>> > > > >> >> >> > to
>> > > > >> >> >> > hear the HDD is good too.
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on
>> > > > >> >> >> > > > sale on ebay
>> > > > >> >> >> > > > that
>> > > > >> >> >> > I looked at, however it was strange. It was definitely
>> > > > >> >> >> > branded a
>> > > > >> >> >> > 1520,
>> > > > >> >> >> > and advertised that way, but the flip up screen said it
>> > > > >> >> >> > was a 386
>> > > > >> >> >> > machine. I decided to get it, and it was only about $90
>> > > > >> >> >> > with
>> > > > >> >> >> > shipping.
>> > > > >> >> >> > When I got the machine, I was very excited when it began
>> > > > >> >> >> > to post,
>> > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed
>> > > > >> >> >> > the
>> > > > >> >> >> > configuration error 02 indicating the CMOS battery was
>> > > > >> >> >> > dead. So I
>> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
>> > > > >> >> >> > model, but
>> > > > >> >> >> > that
>> > > > >> >> >> > was
>> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a
>> > > > >> >> >> > spare.
>> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off
>> > > > >> >> >> > to
>> > > > >> >> >> > discover
>> > > > >> >> >> > that not only was this really a 386 machine (a 1530),
>> > > > >> >> >> > but it also
>> > > > >> >> >> > had
>> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the
>> > > > >> >> >> > 1287A and
>> > > > >> >> >> > this
>> > > > >> >> >> > solved the configuration error just fine. But alas, I
>> > > > >> >> >> > didn't get
>> > > > >> >> >> > a
>> > > > >> >> >> > triple crown winner here. The Conner drive was
>> > > > >> >> >> > definitely dead.
>> > > > >> >> >> > But
>> > > > >> >> >> > heck, getting another HDD is easy compared to the other
>> > > > >> >> >> > benefits!
>> > > > >> >> >> > The
>> > > > >> >> >> > original owner of this machine definitely took care of
>> > > > >> >> >> > it.
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > Phil
>> > > > >> >> >> > > >
>> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "techtalklive@" <doug@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > > >
>> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
>> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran
>> > > > >> >> >> > > > > the wires
>> > > > >> >> >> > > > > to
>> > > > >> >> >> > > > > a
>> > > > >> >> >> > convenient place for the battery. Upon power up it said
>> > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
>> > > > >> >> >> > > > > The "stopped" message threw me, I thought
>> > > > >> >> >> > > > > something was
>> > > > >> >> >> > > > > wrong
>> > > > >> >> >> > > > > with
>> > > > >> >> >> > > > > the chip. It took an F1 to continue and went right
>> > > > >> >> >> > > > > through
>> > > > >> >> >> > > > > POST
>> > > > >> >> >> > and Autoexec.
>> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set
>> > > > >> >> >> > > > > the RTC.
>> > > > >> >> >> > > > > Now it boots cleanly.
>> > > > >> >> >> > > > > Has Lotus123 on the HD.
>> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"...
>> > > > >> >> >> > > > > page 2!
>> > > > >> >> >> > > > > The only remaining issue is that a few keys on the
>> > > > >> >> >> > > > > keyboard
>> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external
>> > > > >> >> >> > > > > kbd
>> > > > >> >> >> > > > > everything
>> > > > >> >> >> > > > > works.
>> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386
>> > > > >> >> >> > > > > with 1MB
>> > > > >> >> >> > > > > RAM,
>> > > > >> >> >> > > > > a
>> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin'
>> > > > >> >> >> > system!
>> > > > >> >> >> > > > >
>> > > > >> >> >> > > > >
>> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "techtalklive@" <doug@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > > > >
>> > > > >> >> >> > > > > > Thanks so much that was great info. I had no
>> > > > >> >> >> > > > > > idea on the
>> > > > >> >> >> > > > > > X2
>> > > > >> >> >> > > > > > being a rating. May have to try it without them
>> > > > >> >> >> > > > > > just to
>> > > > >> >> >> > > > > > make sure the rest of it is still good.
>> > > > >> >> >> > > > > >
>> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "fullsizewagon"
>> > > > >> >> >> > <andrebakken@> wrote:
>> > > > >> >> >> > > > > > >
>> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a
>> > > > >> >> >> > > > > > > big
>> > > > >> >> >> > > > > > > difference.
>> > > > >> >> >> > The X2 also signifies they're an enhanced type meant to
>> > > > >> >> >> > go
>> > > > >> >> >> > directly
>> > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
>> > > > >> >> >> > > > > > > The PSU will work without those cap's in
>> > > > >> >> >> > > > > > > place, but
>> > > > >> >> >> > > > > > > will
>> > > > >> >> >> > radiate more interference/noise out onto the mains.
>> > > > >> >> >> > > > > > >
>> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "techtalklive@" <doug@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > > > > > >
>> > > > >> >> >> > > > > > > > There are two in there that are the same.
>> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square
>> > > > >> >> >> > > > > > > > package.
>> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
>> > > > >> >> >> > > > > > > > radial shape.
>> > > > >> >> >> > > > > > > > I have them out already.
>> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
>> > > > >> >> >> > > > > > > >
>> > > > >> >> >> > > > > > > > DC
>> > > > >> >> >> > > > > ; > >
>> > > > >> >> >> > > > > > > >
>> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> > > > >> >> >> > <Jeriddian@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > > > > > > >
>> > > > >> >> >> > > > > > > > > Good Find, DC
>> > > > >> >> >> > > > > > > > >
>> > > > >> >> >> > > > > > > > > I guess they got burnt to the point where
>> > > > >> >> >> > > > > > > > > you can't
>> > > > >> >> >> > identify the capcity amount. Could you give me the
>> > > > >> >> >> > output voltage
>> > > > >> >> >> > and
>> > > > >> >> >> > amperage? I'll look through my units and see if I can
>> > > > >> >> >> > identify
>> > > > >> >> >> > them
>> > > > >> >> >> > for you.
>> > > > >> >> >> > > > > > > > >
>> > > > >> >> >> > > > > > > > > Phil
>> > > > >> >> >> > > > > > > > >
>> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "techtalklive@" <doug@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > > > > > > > >
>> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a
>> > > > >> >> >> > > > > > > > > > failed cap
>> > > > >> >> >> > > > > > > > > > in
>> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
>> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
>> > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
>> > > > >> >> >> > > > > > > > > > There appears to be two of the same
>> > > > >> >> >> > > > > > > > > > caps, would
>> > > > >> >> >> > replace both
>> > > > >> >> >> > > > > > > > > > of course.
>> > > > >> >> >> > > > > > > > > >
>> > > > >> >> >> > > > > > > > > > DC
>> > > > >> >> >> > > > > > > > > >
>> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> > > > >> >> >> > "techtalklive@" <doug@>
>> > > > >> >> >> > wrote:
>> > > > >> >> >> > > > > > > > > > >
>> > > > >> >> >> > > > > > > > > > > I am considering tackling the repair
>> > > > >> >> >> > > > > > > > > > > of a 1530
>> > > > >> >> >> > > > > > > > > > > that
>> > > > >> >> >> > > > > > > > > > > does not respond to the power switch.
>> > > > >> >> >> > > > > > > > > > > The power
>> > > > >> >> >> > > > > > > > > > > supply
>> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its
>> > > > >> >> >> > > > > > > > > > > fine
>> > > > >> >> >> > (unfortunately,
>> > > > >> >> >> > > > > > > > > > > that would have been an easy problem
>> > > > >> >> >> > > > > > > > > > > isolation!)
>> > > > >> >> >> > > > > > > > > > > So its something internal. I have the
>> > > > >> >> >> > > > > > > > > > > service
>> > > > >> >> >> > > > > > > > > > > manuals
>> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get
>> > > > >> >> >> > > > > > > > > > > some
>> > > > >> >> >> > > > > > > > > > > pointers
>> > > > >> >> >> > form
>> > > > >> >> >> > > > > > > > > > > folks who have already performed cold
>> > > > >> >> >> > > > > > > > > > > stone
>> > > > >> >> >> > > > > > > > > > > dead
>> > > > >> >> >> > diagnosis.
>> > > > >> >> >> > > > > > > > > > >
>> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this
>> > > > >> >> >> > > > > > > > > > > very clean
>> > > > >> >> >> > > > > > > > > > > 1530
>> > > > >> >> >> > > > > > > > > > > will
>> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
>> > > > >> >> >> > > > > > > > > > >
>> > > > >> >> >> > > > > > > > > > > Thanks in advance,
>> > > > >> >> >> > > > > > > > > > > DC
>> > > > >> >> >> > > > > > > > > > >
>> > > > >> >> >> > > > > > > > > >
>> > > > >> >> >> > > > > > > > >
>> > > > >> >> >> > > > > > > >
>> > > > >> >> >> > > > > > >
>> > > > >> >> >> > > > > >
>> > > > >> >> >> > > > >
>> > > > >> >> >> > > >
>> > > > >> >> >> > >
>> > > > >> >> >> >
>> > > > >> >> >>
>> > > > >> >> >> Since we are on the topic of TCP does anyone have a
>> > > > >> >> >> formula stashed
>> > > > >> >> >> that
>> > > > >> >> >> can be easily had to run say serial (probably ppp) from
>> > > > >> >> >> something
>> > > > >> >> >> like
>> > > > >> >> >> a
>> > > > >> >> >> small system like the raspberry pi serially to a system
>> > > > >> >> >> with dos
>> > > > >> >> >> and a
>> > > > >> >> >> stack? It's been so long since I messed with dos
>> > > > >> >> >> environment
>> > > > >> >> >> networking
>> > > > >> >> >> I forget.
>> > > > >> >> >>
>> > > > >> >> >> I think windows of some sort had trumpet to handle part of
>> > > > >> >> >> the
>> > > > >> >> >> equation,
>> > > > >> >> >> but I don' t have any references right now over a dos
>> > > > >> >> >> stack.
>> > > > >> >> >>
>> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98
>> > > > >> >> >> would be
>> > > > >> >> >> better,
>> > > > >> >> >> but I don't know if the hardware here would be up to those
>> > > > >> >> >> os's.
>> > > > >> >> >>
>> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be
>> > > > >> >> >> nice too.
>> > > > >> >> >> I'm
>> > > > >> >> >> asking for everything here. Objective is to have
>> > > > >> >> >> something that
>> > > > >> >> >> could
>> > > > >> >> >> suck off or load a disk image with a floppy boot. I
>> > > > >> >> >> suspect it was
>> > > > >> >> >> a
>> > > > >> >> >> difficult thing to get going in the day, though, and even
>> > > > >> >> >> wors now.
>> > > > >> >> >>
>> > > > >> >> >> jim
>> > > > >> >> >> >
>> > > > >> >> >> > ,___
>> > > > >> >> >> >
>> > > > >> >> >>
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> > ------------------------------------
>> > > > >> >> >
>> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
>> > > > >> >> > Links
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >> >
>> > > > >> >>
>> > > > >> >
>> > > > >> >
>> > > > >> >
>> > > > >> >
>> > > > >> > ------------------------------------
>> > > > >> >
>> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
>> > Links
>> > > > >> >
>> > > > >> >
>> > > > >> >
>> > > > >>
>> > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > > > ------------------------------------
>> > > > >
>> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> > > > >
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>>
>>
>>
>>
>> ------------------------------------
>>
>> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Sun, 21 Oct 2012 02:40:46 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
I'm going to take a shot at shoe-horning some low height 1MB SIMMs
in their. Let ya'll know how it goes.
That Megatrends card sounds familiar; I suspect I worried about
drive support way back in the day. Actually drive support
is also an issue with these 1530s.
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> Wow. And, I suppose if you could find SIPPs from, say, Crucial or Corsair,
> they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
> printer I owned, and Crucial wanted about a buck and a half a meg. Yeah,
> that Paradox adapter would be swell. That may have gone the way of the $50
> card that American Megatrends used to make that would plug into any ISA slot
> and patch the BIOS so that you could use any size hard drive by any
> manufacturer. Lots of good ideas like that, but they just sort of faded
> away.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: "jeriddian" <Jeriddian@...>
> To: <RuGRiD-Laptop@yahoogroups.com>
> Sent: Thursday, October 18, 2012 9:41 PM
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> > There was a company that at one time made an adaptation for the GRiD's
> > called paradox in which they made an adapter that fit into the pin slots
> > (I think. I've never actually seen it, but this is what I heard) and into
> > which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for this,
> > but never found it. That would be cool to find and use.
> >
> > The problems with the memory adaptation is ther is very, very little room
> > for the memory to fit. The MoBo was actually designed to fit the smallest
> > RAM stick they made at the time. You have to use a low profile SIPP, one
> > with no extra PC Board material off to the sides. You could try laying the
> > wired SIMM's over, but I looked at trying to do that with high profile
> > SIPP's and there really isn't any room to do that either. I think if
> > someone coud come up with an adapter like the paradox I described that fit
> > 2 4 MB sticks to run in the eight rows of holes, that would likely be the
> > best answer.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >>
> >> If you made the leads long enough to lay the SIMMs over on their side,
> >> and insulated them so that they wouldn't short anything out, would you
> >> have any lead dress problems, such as EMI/RFI, stray capacitance or
> >> inductance, etc.? And, if so, wonder if installing ferrite beads on the
> >> leads would help.
> >>
> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> "She said it was either her or the ham radio. Over."
> >>
> >>
> >> ----- Original Message -----
> >> From: Shawnerz
> >> To: rugrid-laptop@yahoogroups.com
> >> Sent: Wednesday, October 17, 2012 12:52 PM
> >> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >>
> >>
> >>
> >>
> >> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM.
> >> Once I soldered the pins on, the module height would not allow the cover
> >> to go on.
> >> Your results may vary,
> >> -Shawn
> >>
> >>
> >>
> >> -------- Original message --------
> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> From: "techtalklive@" <doug@>
> >> To: RuGRiD-Laptop@yahoogroups.com
> >> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >>
> >>
> >>
> >>
> >> Well that sounds promising. The only thing that would
> >> top that would be a native SCSI attached to the bus connectors
> >> in the accessory port. A ParPort one would do in the meantime.
> >> Thanks!
> >>
> >> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> >> Anyone know the mem speed? Hate to take the thing apart right
> >> now to find out.
> >> Thanks!
> >>
> >> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >> >
> >> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked
> >> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the mobo
> >> > clocked down to 12.5 MHz.
> >> >
> >> > The problem with trying to access a higher capacity drive from the
> >> > parallel port is that DOS is not capable of handling a large number of
> >> > addresses. Of course, SCSI then is an option in doing that. I have a
> >> > portable SCSI device which hooks into the parallel port made by
> >> > Adaptec, called the Mini-SCSI which will allow the computer to connect
> >> > to a larger drive such as a CDROM, large HDD, ZIP drive, or similar
> >> > device by a SCSI-II connection. The SCSI connector has a parallel port
> >> > on it that allows you to throughput a connection to your printer. I
> >> > think that the maximum HDD capacity I can use with this thing is 2T.
> >> >
> >> > Phil
> >> >
> >> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >> > >
> >> > > I used to have all that stuff. Today I think I can run a dos program
> >> > > on the GRiD that talks to my trusty TotalCommander on another PC.
> >> > > As I might have mentioned in another post, if I could get
> >> > > another PC to appear as a mounted drive to the GRiD I'd be in
> >> > > real fat city. Then I'd have the machine wide open to the rest of
> >> > > the world.
> >> > > Any ideas there?
> >> > >
> >> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
> >> > > wrote:
> >> > > >
> >> > > > Good luck with the Backpack stuff.
> >> > > >
> >> > > > There's a book called "Hot Links", which was produced by the same
> >> > > > people
> >> > > > that produced LapLink. In the back of the book is a disk with
> >> > > > programs that
> >> > > > will let you transfer files, either via null modem cable or LapLink
> >> > > > cable.
> >> > > > I doubt that the book is still in print, but it might be something
> >> > > > to look
> >> > > > for. If you get the book without the disk, let me know, and I'll
> >> > > > get you
> >> > > > the software. I can't remember if it lets you map the host drive
> >> > > > to the
> >> > > > client machine, but that would be cool, if it does that.
> >> > > >
> >> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> > > > "She said it was either her or the ham radio. Over."
> >> > > >
> >> > > >
> >> > > > ----- Original Message -----
> >> > > > From: "techtalklive@" <doug@>
> >> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> >> > > > Sent: Monday, October 15, 2012 10:47 PM
> >> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> > > >
> >> > > >
> >> > > > > Its a 1530... clock is... I dont know 20Mhz?
> >> > > > > Yes checking out Backpacks now. Just collected drivers from
> >> > > > > around the web for them and am checking on ebay for
> >> > > > > equipment. I suspect they will work.
> >> > > > >
> >> > > > > I thought I might take a look to see if there was parallel port
> >> > > > > software that would work like "laplink" to tether to another PC
> >> > > > > but would make a directory/drive on the the host PC appear as a
> >> > > > > drive to
> >> > > > > the 1530.
> >> > > > >
> >> > > > > That would be cool... and avoid purchasing old hardware.
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
> >> > > > > wrote:
> >> > > > >>
> >> > > > >> What's the bus clock of the 1520, for example? If it's 10MHz,
> >> > > > >> it *might*
> >> > > > >> make it, but it would be breathing hard. As for parallel
> >> > > > >> drives, see if
> >> > > > >> you
> >> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive that
> >> > > > >> works off
> >> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> >> > > > >>
> >> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> > > > >> "She said it was either her or the ham radio. Over."
> >> > > > >>
> >> > > > >>
> >> > > > >> ----- Original Message -----
> >> > > > >> From: "techtalklive@" <doug@>
> >> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> >> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> > > > >>
> >> > > > >>
> >> > > > >> >
> >> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has
> >> > > > >> > limited
> >> > > > >> > driver
> >> > > > >> > support.
> >> > > > >> > Other similar devices don't seem to be on the used market
> >> > > > >> > right not.
> >> > > > >> > I'm also considering a parallel based disk drive at this
> >> > > > >> > point.
> >> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
> >> > > > >> > think... I
> >> > > > >> > didn't
> >> > > > >> > actually run the numbers.
> >> > > > >> > DC
> >> > > > >> >
> >> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> >> > > > >> > <n8euj@> wrote:
> >> > > > >> >>
> >> > > > >> >> I don't think I'd even bother with the serial port. You
> >> > > > >> >> might get
> >> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs, but
> >> > > > >> >> even a
> >> > > > >> >> 16550AFN
> >> > > > >> >> will only give you 115,200bps. And, if it's an 8250A/16450
> >> > > > >> >> UART, you
> >> > > > >> >> have
> >> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
> >> > > > >> >> standard
> >> > > > >> >> parallel
> >> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
> >> > > > >> >> faster with
> >> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of a
> >> > > > >> >> GRiD, but
> >> > > > >> >> even
> >> > > > >> >> if you could directly tie in to the ISA bus, it would be
> >> > > > >> >> tough.
> >> > > > >> >>
> >> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> > > > >> >> "She said it was either her or the ham radio. Over."
> >> > > > >> >>
> >> > > > >> >>
> >> > > > >> >> ----- Original Message -----
> >> > > > >> >> From: "Androgenoide" <androgenoide@>
> >> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> >> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> >> > > > >> >> modes?
> >> > > > >> >>
> >> > > > >> >>
> >> > > > >> >> > The only real obstacle to DOS networking with the Grid is
> >> > > > >> >> > finding an
> >> > > > >> >> > Ethernet adapter that will work through either the serial
> >> > > > >> >> > or
> >> > > > >> >> > parallel
> >> > > > >> >> > ports. I used the Xircom on the parallel port because I
> >> > > > >> >> > had one at
> >> > > > >> >> > the
> >> > > > >> >> > time. I've got a serial device server now that would
> >> > > > >> >> > probably work
> >> > > > >> >> > too
> >> > > > >> >> > but I've got too much going on at the moment to dig out a
> >> > > > >> >> > Grid just
> >> > > > >> >> > to
> >> > > > >> >> > see
> >> > > > >> >> > what would be required. Either of those solutions would
> >> > > > >> >> > be limited
> >> > > > >> >> > by
> >> > > > >> >> > the speed of the ports(and the Grid itself), of course.
> >> > > > >> >> > Gigabit
> >> > > > >> >> > speeds
> >> > > > >> >> > are out of the question!
> >> > > > >> >> > Another thought... The guy who put together the Techworm
> >> > > > >> >> > boot disk
> >> > > > >> >> > also
> >> > > > >> >> > had one called Networm, a single floppy that could do a
> >> > > > >> >> > dialup
> >> > > > >> >> > internet
> >> > > > >> >> > connection... (if you still have access to a dialup
> >> > > > >> >> > service... if
> >> > > > >> >> > not,
> >> > > > >> >> > Budget Dial Up has a prepaid service that allows you to buy
> >> > > > >> >> > just a
> >> > > > >> >> > few
> >> > > > >> >> > hours at a time).
> >> > > > >> >> >
> >> > > > >> >> > Generally speaking, if an old machine has either a serial
> >> > > > >> >> > or
> >> > > > >> >> > parallel
> >> > > > >> >> > port
> >> > > > >> >> > and you can get it to boot into DOS, there is always a way
> >> > > > >> >> > to
> >> > > > >> >> > transfer
> >> > > > >> >> > files to another machine. Even if it has no floppy you
> >> > > > >> >> > can use
> >> > > > >> >> > another
> >> > > > >> >> > DOS machine running Laplink. If it does have a floppy
> >> > > > >> >> > there are a
> >> > > > >> >> > lot
> >> > > > >> >> > of
> >> > > > >> >> > file transfer programs out there, from Kermit to the
> >> > > > >> >> > original
> >> > > > >> >> > version
> >> > > > >> >> > of
> >> > > > >> >> > Procomm that will fit on a single floppy.
> >> > > > >> >> >
> >> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of
> >> > > > >> >> > RAM... a
> >> > > > >> >> > full
> >> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95 would
> >> > > > >> >> > be
> >> > > > >> >> > tricky
> >> > > > >> >> > and
> >> > > > >> >> > would require some hardware tweaks even to make a slow
> >> > > > >> >> > machine...
> >> > > > >> >> > kind
> >> > > > >> >> > of
> >> > > > >> >> > an extreme project. I've heard of a Linux distro that
> >> > > > >> >> > will fit on
> >> > > > >> >> > a
> >> > > > >> >> > single floppy and run on systems with limited resources
> >> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but
> >> > > > >> >> > even that
> >> > > > >> >> > one
> >> > > > >> >> > seems to want 4MB of RAM.
> >> > > > >> >> >
> >> > > > >> >> > There are plenty of people on the web who have too much
> >> > > > >> >> > time on
> >> > > > >> >> > their
> >> > > > >> >> > hands and are still playing with machines even older than
> >> > > > >> >> > the
> >> > > > >> >> > Grid...
> >> > > > >> >> > You
> >> > > > >> >> > can still buy new after-market accessories for Commodores,
> >> > > > >> >> > for
> >> > > > >> >> > example,
> >> > > > >> >> > so
> >> > > > >> >> > don't assume that there are no new solutions to old
> >> > > > >> >> > problems.
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@> wrote:
> >> > > > >> >> >>
> >> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >> > > > >> >> >> >
> >> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the
> >> > > > >> >> >> > parallel
> >> > > > >> >> >> > port
> >> > > > >> >> >> > to
> >> > > > >> >> >> > a NIC... although I've been wondering lately if it might
> >> > > > >> >> >> > not have
> >> > > > >> >> >> > made
> >> > > > >> >> >> > equally good sense to use a device server on the serial
> >> > > > >> >> >> > port...?
> >> > > > >> >> >> > And,
> >> > > > >> >> >> > of course, the Arachne browser... not many choices for a
> >> > > > >> >> >> > DOS
> >> > > > >> >> >> > browser
> >> > > > >> >> >> > are there? I used it to check my Yahoo web mail and I'll
> >> > > > >> >> >> > have to
> >> > > > >> >> >> > say
> >> > > > >> >> >> > that it gave a whole new dimension of meaning to the
> >> > > > >> >> >> > word "slow."
> >> > > > >> >> >> > Go
> >> > > > >> >> >> > ahead, make a pot of tea while it's loading that page,
> >> > > > >> >> >> > it will be
> >> > > > >> >> >> > a
> >> > > > >> >> >> > while.
> >> > > > >> >> >> >
> >> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran into a
> >> > > > >> >> >> > web page
> >> > > > >> >> >> > last
> >> > > > >> >> >> > week of a guy who was competing with a friend to see who
> >> > > > >> >> >> > could
> >> > > > >> >> >> > force
> >> > > > >> >> >> > Windows XP to run with the least resources. It won't
> >> > > > >> >> >> > install
> >> > > > >> >> >> > unless
> >> > > > >> >> >> > it
> >> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor but,
> >> > > > >> >> >> > once
> >> > > > >> >> >> > installed
> >> > > > >> >> >> > you can remove RAM and underclock the machine... He said
> >> > > > >> >> >> > he got
> >> > > > >> >> >> > one
> >> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock and
> >> > > > >> >> >> > it took a
> >> > > > >> >> >> > half
> >> > > > >> >> >> > hour to boot.
> >> > > > >> >> >> >
> >> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I
> >> > > > >> >> >> > have nothing
> >> > > > >> >> >> > else
> >> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can get
> >> > > > >> >> >> > online
> >> > > > >> >> >> > with
> >> > > > >> >> >> > a
> >> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that
> >> > > > >> >> >> > Contiki
> >> > > > >> >> >> > OS/browser
> >> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> >> > > > >> >> >> >
> >> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "techtalklive@"
> >> > > > >> >> >> > <doug@> wrote:
> >> > > > >> >> >> > >
> >> > > > >> >> >> > > Like the hack job? :O
> >> > > > >> >> >> > >
> >> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone
> >> > > > >> >> >> > > swapped
> >> > > > >> >> >> > > screes?
> >> > > > >> >> >> > > Should I take the kbd apart and clean it (will that
> >> > > > >> >> >> > > likely
> >> > > > >> >> >> > > fix it?) or look for a replacement?
> >> > > > >> >> >> > >
> >> > > > >> >> >> > > So what can I do with this thing if I put more mem in
> >> > > > >> >> >> > > it?
> >> > > > >> >> >> > > Its all accessed funky through expaned mem methods,
> >> > > > >> >> >> > > isn't it?
> >> > > > >> >> >> > > I have a coprocessor I could put in this but not sure
> >> > > > >> >> >> > > of
> >> > > > >> >> >> > > the point there.
> >> > > > >> >> >> > >
> >> > > > >> >> >> > > I think I might like to accomplish getting it on the
> >> > > > >> >> >> > > web.
> >> > > > >> >> >> > > I'd need the LAN hardware I guess.
> >> > > > >> >> >> > > Any other ideas?
> >> > > > >> >> >> > >
> >> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
> >> > > > >> >> >> > > contact on
> >> > > > >> >> >> > > it that mate inside the cavity. But one of the two
> >> > > > >> >> >> > > spring
> >> > > > >> >> >> > > contacts
> >> > > > >> >> >> > > inside is "rubberized", so only the one contact hits
> >> > > > >> >> >> > > metal to
> >> > > > >> >> >> > > metal.
> >> > > > >> >> >> > > So the P.S. only works using the cord to go from the
> >> > > > >> >> >> > > P.S. into
> >> > > > >> >> >> > > the
> >> > > > >> >> >> > > radial DC jack. Strange?
> >> > > > >> >> >> > >
> >> > > > >> >> >> > > DC
> >> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> >> > > > >> >> >> > <Jeriddian@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > Great job, Doug!
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of
> >> > > > >> >> >> > > > these
> >> > > > >> >> >> > > > beautiful
> >> > > > >> >> >> > machines? And yep, that's the way it works.
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > Once you restore battery power to the 1287A, the
> >> > > > >> >> >> > > > CMOS
> >> > > > >> >> >> > > > registers
> >> > > > >> >> >> > are again active. It's just that they're filled with
> >> > > > >> >> >> > nonsense, so
> >> > > > >> >> >> > the
> >> > > > >> >> >> > computer tells you the clock had stopped (which it did),
> >> > > > >> >> >> > and
> >> > > > >> >> >> > simply
> >> > > > >> >> >> > prompts you to reset the time. Once you do that and
> >> > > > >> >> >> > reboot,
> >> > > > >> >> >> > everything's hunky-dory.
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > You can probably find some more 256K sticks
> >> > > > >> >> >> > > > somewhere and
> >> > > > >> >> >> > > > upgrade
> >> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to Ver.
> >> > > > >> >> >> > 6.22.
> >> > > > >> >> >> > Great
> >> > > > >> >> >> > to
> >> > > > >> >> >> > hear the HDD is good too.
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on
> >> > > > >> >> >> > > > sale on ebay
> >> > > > >> >> >> > > > that
> >> > > > >> >> >> > I looked at, however it was strange. It was definitely
> >> > > > >> >> >> > branded a
> >> > > > >> >> >> > 1520,
> >> > > > >> >> >> > and advertised that way, but the flip up screen said it
> >> > > > >> >> >> > was a 386
> >> > > > >> >> >> > machine. I decided to get it, and it was only about $90
> >> > > > >> >> >> > with
> >> > > > >> >> >> > shipping.
> >> > > > >> >> >> > When I got the machine, I was very excited when it began
> >> > > > >> >> >> > to post,
> >> > > > >> >> >> > because I got a full 8MB of RAM! It of course displayed
> >> > > > >> >> >> > the
> >> > > > >> >> >> > configuration error 02 indicating the CMOS battery was
> >> > > > >> >> >> > dead. So I
> >> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
> >> > > > >> >> >> > model, but
> >> > > > >> >> >> > that
> >> > > > >> >> >> > was
> >> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I had a
> >> > > > >> >> >> > spare.
> >> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard off
> >> > > > >> >> >> > to
> >> > > > >> >> >> > discover
> >> > > > >> >> >> > that not only was this really a 386 machine (a 1530),
> >> > > > >> >> >> > but it also
> >> > > > >> >> >> > had
> >> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced the
> >> > > > >> >> >> > 1287A and
> >> > > > >> >> >> > this
> >> > > > >> >> >> > solved the configuration error just fine. But alas, I
> >> > > > >> >> >> > didn't get
> >> > > > >> >> >> > a
> >> > > > >> >> >> > triple crown winner here. The Conner drive was
> >> > > > >> >> >> > definitely dead.
> >> > > > >> >> >> > But
> >> > > > >> >> >> > heck, getting another HDD is easy compared to the other
> >> > > > >> >> >> > benefits!
> >> > > > >> >> >> > The
> >> > > > >> >> >> > original owner of this machine definitely took care of
> >> > > > >> >> >> > it.
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > Phil
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > > >
> >> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> >> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and ran
> >> > > > >> >> >> > > > > the wires
> >> > > > >> >> >> > > > > to
> >> > > > >> >> >> > > > > a
> >> > > > >> >> >> > convenient place for the battery. Upon power up it said
> >> > > > >> >> >> > > > > that the RTC was stopped, and it needed setting.
> >> > > > >> >> >> > > > > The "stopped" message threw me, I thought
> >> > > > >> >> >> > > > > something was
> >> > > > >> >> >> > > > > wrong
> >> > > > >> >> >> > > > > with
> >> > > > >> >> >> > > > > the chip. It took an F1 to continue and went right
> >> > > > >> >> >> > > > > through
> >> > > > >> >> >> > > > > POST
> >> > > > >> >> >> > and Autoexec.
> >> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory set
> >> > > > >> >> >> > > > > the RTC.
> >> > > > >> >> >> > > > > Now it boots cleanly.
> >> > > > >> >> >> > > > > Has Lotus123 on the HD.
> >> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"...
> >> > > > >> >> >> > > > > page 2!
> >> > > > >> >> >> > > > > The only remaining issue is that a few keys on the
> >> > > > >> >> >> > > > > keyboard
> >> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external
> >> > > > >> >> >> > > > > kbd
> >> > > > >> >> >> > > > > everything
> >> > > > >> >> >> > > > > works.
> >> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01 386
> >> > > > >> >> >> > > > > with 1MB
> >> > > > >> >> >> > > > > RAM,
> >> > > > >> >> >> > > > > a
> >> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some smokin'
> >> > > > >> >> >> > system!
> >> > > > >> >> >> > > > >
> >> > > > >> >> >> > > > >
> >> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > > > >
> >> > > > >> >> >> > > > > > Thanks so much that was great info. I had no
> >> > > > >> >> >> > > > > > idea on the
> >> > > > >> >> >> > > > > > X2
> >> > > > >> >> >> > > > > > being a rating. May have to try it without them
> >> > > > >> >> >> > > > > > just to
> >> > > > >> >> >> > > > > > make sure the rest of it is still good.
> >> > > > >> >> >> > > > > >
> >> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "fullsizewagon"
> >> > > > >> >> >> > <andrebakken@> wrote:
> >> > > > >> >> >> > > > > > >
> >> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes a
> >> > > > >> >> >> > > > > > > big
> >> > > > >> >> >> > > > > > > difference.
> >> > > > >> >> >> > The X2 also signifies they're an enhanced type meant to
> >> > > > >> >> >> > go
> >> > > > >> >> >> > directly
> >> > > > >> >> >> > across the mains. Be sure to get X2 rated replacements.
> >> > > > >> >> >> > > > > > > The PSU will work without those cap's in
> >> > > > >> >> >> > > > > > > place, but
> >> > > > >> >> >> > > > > > > will
> >> > > > >> >> >> > radiate more interference/noise out onto the mains.
> >> > > > >> >> >> > > > > > >
> >> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > > > > > >
> >> > > > >> >> >> > > > > > > > There are two in there that are the same.
> >> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> >> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square
> >> > > > >> >> >> > > > > > > > package.
> >> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
> >> > > > >> >> >> > > > > > > > radial shape.
> >> > > > >> >> >> > > > > > > > I have them out already.
> >> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> >> > > > >> >> >> > > > > > > >
> >> > > > >> >> >> > > > > > > > DC
> >> > > > >> >> >> > > > > ; > >
> >> > > > >> >> >> > > > > > > >
> >> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> >> > > > >> >> >> > <Jeriddian@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > > > > > > >
> >> > > > >> >> >> > > > > > > > > Good Find, DC
> >> > > > >> >> >> > > > > > > > >
> >> > > > >> >> >> > > > > > > > > I guess they got burnt to the point where
> >> > > > >> >> >> > > > > > > > > you can't
> >> > > > >> >> >> > identify the capcity amount. Could you give me the
> >> > > > >> >> >> > output voltage
> >> > > > >> >> >> > and
> >> > > > >> >> >> > amperage? I'll look through my units and see if I can
> >> > > > >> >> >> > identify
> >> > > > >> >> >> > them
> >> > > > >> >> >> > for you.
> >> > > > >> >> >> > > > > > > > >
> >> > > > >> >> >> > > > > > > > > Phil
> >> > > > >> >> >> > > > > > > > >
> >> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like a
> >> > > > >> >> >> > > > > > > > > > failed cap
> >> > > > >> >> >> > > > > > > > > > in
> >> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> >> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> >> > > > >> >> >> > > > > > > > > > Any identification tips welcome, thanks.
> >> > > > >> >> >> > > > > > > > > > There appears to be two of the same
> >> > > > >> >> >> > > > > > > > > > caps, would
> >> > > > >> >> >> > replace both
> >> > > > >> >> >> > > > > > > > > > of course.
> >> > > > >> >> >> > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > > DC
> >> > > > >> >> >> > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> > > > >> >> >> > wrote:
> >> > > > >> >> >> > > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > > > I am considering tackling the repair
> >> > > > >> >> >> > > > > > > > > > > of a 1530
> >> > > > >> >> >> > > > > > > > > > > that
> >> > > > >> >> >> > > > > > > > > > > does not respond to the power switch.
> >> > > > >> >> >> > > > > > > > > > > The power
> >> > > > >> >> >> > > > > > > > > > > supply
> >> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think its
> >> > > > >> >> >> > > > > > > > > > > fine
> >> > > > >> >> >> > (unfortunately,
> >> > > > >> >> >> > > > > > > > > > > that would have been an easy problem
> >> > > > >> >> >> > > > > > > > > > > isolation!)
> >> > > > >> >> >> > > > > > > > > > > So its something internal. I have the
> >> > > > >> >> >> > > > > > > > > > > service
> >> > > > >> >> >> > > > > > > > > > > manuals
> >> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd get
> >> > > > >> >> >> > > > > > > > > > > some
> >> > > > >> >> >> > > > > > > > > > > pointers
> >> > > > >> >> >> > form
> >> > > > >> >> >> > > > > > > > > > > folks who have already performed cold
> >> > > > >> >> >> > > > > > > > > > > stone
> >> > > > >> >> >> > > > > > > > > > > dead
> >> > > > >> >> >> > diagnosis.
> >> > > > >> >> >> > > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this
> >> > > > >> >> >> > > > > > > > > > > very clean
> >> > > > >> >> >> > > > > > > > > > > 1530
> >> > > > >> >> >> > > > > > > > > > > will
> >> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> >> > > > >> >> >> > > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> >> > > > >> >> >> > > > > > > > > > > DC
> >> > > > >> >> >> > > > > > > > > > >
> >> > > > >> >> >> > > > > > > > > >
> >> > > > >> >> >> > > > > > > > >
> >> > > > >> >> >> > > > > > > >
> >> > > > >> >> >> > > > > > >
> >> > > > >> >> >> > > > > >
> >> > > > >> >> >> > > > >
> >> > > > >> >> >> > > >
> >> > > > >> >> >> > >
> >> > > > >> >> >> >
> >> > > > >> >> >>
> >> > > > >> >> >> Since we are on the topic of TCP does anyone have a
> >> > > > >> >> >> formula stashed
> >> > > > >> >> >> that
> >> > > > >> >> >> can be easily had to run say serial (probably ppp) from
> >> > > > >> >> >> something
> >> > > > >> >> >> like
> >> > > > >> >> >> a
> >> > > > >> >> >> small system like the raspberry pi serially to a system
> >> > > > >> >> >> with dos
> >> > > > >> >> >> and a
> >> > > > >> >> >> stack? It's been so long since I messed with dos
> >> > > > >> >> >> environment
> >> > > > >> >> >> networking
> >> > > > >> >> >> I forget.
> >> > > > >> >> >>
> >> > > > >> >> >> I think windows of some sort had trumpet to handle part of
> >> > > > >> >> >> the
> >> > > > >> >> >> equation,
> >> > > > >> >> >> but I don' t have any references right now over a dos
> >> > > > >> >> >> stack.
> >> > > > >> >> >>
> >> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98
> >> > > > >> >> >> would be
> >> > > > >> >> >> better,
> >> > > > >> >> >> but I don't know if the hardware here would be up to those
> >> > > > >> >> >> os's.
> >> > > > >> >> >>
> >> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be
> >> > > > >> >> >> nice too.
> >> > > > >> >> >> I'm
> >> > > > >> >> >> asking for everything here. Objective is to have
> >> > > > >> >> >> something that
> >> > > > >> >> >> could
> >> > > > >> >> >> suck off or load a disk image with a floppy boot. I
> >> > > > >> >> >> suspect it was
> >> > > > >> >> >> a
> >> > > > >> >> >> difficult thing to get going in the day, though, and even
> >> > > > >> >> >> wors now.
> >> > > > >> >> >>
> >> > > > >> >> >> jim
> >> > > > >> >> >> >
> >> > > > >> >> >> > ,___
> >> > > > >> >> >> >
> >> > > > >> >> >>
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> > ------------------------------------
> >> > > > >> >> >
> >> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> >> > > > >> >> > Links
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >> >
> >> > > > >> >>
> >> > > > >> >
> >> > > > >> >
> >> > > > >> >
> >> > > > >> >
> >> > > > >> > ------------------------------------
> >> > > > >> >
> >> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> >> > Links
> >> > > > >> >
> >> > > > >> >
> >> > > > >> >
> >> > > > >>
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > > > ------------------------------------
> >> > > > >
> >> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> >>
> >>
> >>
> >> ------------------------------------
> >>
> >> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
Date: Sun, 21 Oct 2012 02:43:45 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
OK I'll talk to myself here...
Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
Talk about early overclocking! GRiD cut corners?
Glad this one didn't go on the space shuttle.
So I put a 33Mhz part in.
I got confused on drop in parts and tried the 486DLC I had around.
no go of course, its "wasn't intended for drop in compatibility"
so I've now read.
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Revitalizing the 1530 GRiD got me looking into my stash of
> old parts. First I found a '387. Put it in, it works.
> Then, almost forgetting the 486 history, I found
> a TI486DLC. So that's a 486 in 386 pinout with improved
> internals and a 1k cache. So that got me thinking, what would
> be the best in class 386 replacement...
> So far I get that the answer is a TI486SXL-50.
>
> 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> Needs a dos sys file to enable the cache at boot.
>
> Concur?
>
> I don't suppose there is much hope in increasing the clocks
> around the MB...
>
> Other optimizing ideas?
>
Date: Sun, 21 Oct 2012 04:44:05 -0000
From: "jeriddian"
Subject: Re: Best GRID 1530 Processor
The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> OK I'll talk to myself here...
> Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> Talk about early overclocking! GRiD cut corners?
> Glad this one didn't go on the space shuttle.
> So I put a 33Mhz part in.
> I got confused on drop in parts and tried the 486DLC I had around.
> no go of course, its "wasn't intended for drop in compatibility"
> so I've now read.
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > Revitalizing the 1530 GRiD got me looking into my stash of
> > old parts. First I found a '387. Put it in, it works.
> > Then, almost forgetting the 486 history, I found
> > a TI486DLC. So that's a 486 in 386 pinout with improved
> > internals and a 1k cache. So that got me thinking, what would
> > be the best in class 386 replacement...
> > So far I get that the answer is a TI486SXL-50.
> >
> > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > Needs a dos sys file to enable the cache at boot.
> >
> > Concur?
> >
> > I don't suppose there is much hope in increasing the clocks
> > around the MB...
> >
> > Other optimizing ideas?
> >
>
Date: Sun, 21 Oct 2012 07:19:58 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
The original part was a 386DX-16. Got pics to prove it.
Yes the 33Mhz part I put in is a DX and is working great.
About the TI486DLC... a loose reading about the chip suggested to me
it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
is bricked.
I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
If that's so it chaps my butt...
Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
And how does a 16Mhz part cut it on a 25Mhz MB?
Does the 16bit data bus, if that is what it is, decouple the
DX's critical timing so that the lower rated parts work OK?
Or dos the part also not actually get a 25Mhz clock?
Inquiring minds want to know!
I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
parts. Perhaps there are TI and IBM parts too. It gets confusing!
If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
Q. Which one of the Cyrix Upgrade products do I use?
A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
On the other hand, what am I fighting for? Its still going to
be a slow 8MB 386/486 machine... I guess its just a fun challenge to
try to max it out.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > OK I'll talk to myself here...
> > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > Talk about early overclocking! GRiD cut corners?
> > Glad this one didn't go on the space shuttle.
> > So I put a 33Mhz part in.
> > I got confused on drop in parts and tried the 486DLC I had around.
> > no go of course, its "wasn't intended for drop in compatibility"
> > so I've now read.
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > old parts. First I found a '387. Put it in, it works.
> > > Then, almost forgetting the 486 history, I found
> > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > internals and a 1k cache. So that got me thinking, what would
> > > be the best in class 386 replacement...
> > > So far I get that the answer is a TI486SXL-50.
> > >
> > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > Needs a dos sys file to enable the cache at boot.
> > >
> > > Concur?
> > >
> > > I don't suppose there is much hope in increasing the clocks
> > > around the MB...
> > >
> > > Other optimizing ideas?
> > >
> >
>
Date: Sun, 21 Oct 2012 09:34:04 -0700 (PDT)
From: Lawrence Walker
Subject: Re: [RuGRiD-Laptop] Re: Best GRID 1530 Processor
text/plain; charset=utf-8
If you look in the files section there is a folder "Grid1520files" I uploaded in 2007, most of which were from the AST archives. There is a Cyrix subfolder in there which is related to Cyrix. IIRC, the Grid 1755, a DEC, and a RS laptop, were all the same copies with one manufacturer, and they used that chip. Except for differing color all the parts were interchangeable. I've never had a 1530 so I couldn't test it. I did use 1000k lo-profile SIPPs I acquired from a guy in Belgium to upgrade one of my 1520 to 8megs (4megs has to be installed IIRC in a 1-3-5-7 order) and used the Grid set-up app to set it for extended memory. The Conner hard-drive failure syndrome knocked me out of my GRIP period and I didn't have a chip programmer to make the needed chips which allowed use of other HDDs
To: RuGRiD-Laptop@yahoogroups.com
>Sent: Sunday, October 21, 2012 2:19:58 AM
>Subject: [RuGRiD-Laptop] Re: Best GRID 1530 Processor
>
>
>
>The original part was a 386DX-16. Got pics to prove it.
>Yes the 33Mhz part I put in is a DX and is working great.
>
>About the TI486DLC... a loose reading about the chip suggested to me
>it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
>but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
>is bricked.
>
>I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
>the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
>
>On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
>If that's so it chaps my butt...
>Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
>
>Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
>Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
>
>And how does a 16Mhz part cut it on a 25Mhz MB?
>Does the 16bit data bus, if that is what it is, decouple the
>DX's critical timing so that the lower rated parts work OK?
>Or dos the part also not actually get a 25Mhz clock?
>
>Inquiring minds want to know!
>
>I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
>parts. Perhaps there are TI and IBM parts too. It gets confusing!
>
>If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
>
>From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
>Q. Which one of the Cyrix Upgrade products do I use?
>A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
>
>On the other hand, what am I fighting for? Its still going to
>be a slow 8MB 386/486 machine... I guess its just a fun challenge to
>try to max it out.
>--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>>
>> The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
>>
>> Phil
>>
>> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
>> >
>> > OK I'll talk to myself here...
>> > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
>> > Talk about early overclocking! GRiD cut corners?
>> > Glad this one didn't go on the space shuttle.
>> > So I put a 33Mhz part in.
>> > I got confused on drop in parts and tried the 486DLC I had around.
>> > no go of course, its "wasn't intended for drop in compatibility"
>> > so I've now read.
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
>> > >
>> > > Revitalizing the 1530 GRiD got me looking into my stash of
>> > > old parts. First I found a '387. Put it in, it works.
>> > > Then, almost forgetting the 486 history, I found
>> > > a TI486DLC. So that's a 486 in 386 pinout with improved
>> > > internals and a 1k cache. So that got me thinking, what would
>> > > be the best in class 386 replacement...
>> > > So far I get that the answer is a TI486SXL-50.
>> > >
>> > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
>> > > Needs a dos sys file to enable the cache at boot.
>> > >
>> > > Concur?
>> > >
>> > > I don't suppose there is much hope in increasing the clocks
>> > > around the MB...
>> > >
>> > > Other optimizing ideas?
>> > >
>> >
>>
>
>
>
>
>
Date: Sun, 21 Oct 2012 13:07:35 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
I wonder if it would be possible to rig up an 8-bit ISA slot somewhere
inside the 1530 so you could use one of those AMI cards. Finding one would
be tough, though.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "techtalklive@..." <doug@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Saturday, October 20, 2012 10:40 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> I'm going to take a shot at shoe-horning some low height 1MB SIMMs
> in their. Let ya'll know how it goes.
> That Megatrends card sounds familiar; I suspect I worried about
> drive support way back in the day. Actually drive support
> is also an issue with these 1530s.
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> Wow. And, I suppose if you could find SIPPs from, say, Crucial or
>> Corsair,
>> they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
>> printer I owned, and Crucial wanted about a buck and a half a meg. Yeah,
>> that Paradox adapter would be swell. That may have gone the way of the
>> $50
>> card that American Megatrends used to make that would plug into any ISA
>> slot
>> and patch the BIOS so that you could use any size hard drive by any
>> manufacturer. Lots of good ideas like that, but they just sort of faded
>> away.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "jeriddian" <Jeriddian@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Thursday, October 18, 2012 9:41 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> > There was a company that at one time made an adaptation for the GRiD's
>> > called paradox in which they made an adapter that fit into the pin
>> > slots
>> > (I think. I've never actually seen it, but this is what I heard) and
>> > into
>> > which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for
>> > this,
>> > but never found it. That would be cool to find and use.
>> >
>> > The problems with the memory adaptation is ther is very, very little
>> > room
>> > for the memory to fit. The MoBo was actually designed to fit the
>> > smallest
>> > RAM stick they made at the time. You have to use a low profile SIPP,
>> > one
>> > with no extra PC Board material off to the sides. You could try laying
>> > the
>> > wired SIMM's over, but I looked at trying to do that with high profile
>> > SIPP's and there really isn't any room to do that either. I think if
>> > someone coud come up with an adapter like the paradox I described that
>> > fit
>> > 2 4 MB sticks to run in the eight rows of holes, that would likely be
>> > the
>> > best answer.
>> >
>> > Phil
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
>> >>
>> >> If you made the leads long enough to lay the SIMMs over on their side,
>> >> and insulated them so that they wouldn't short anything out, would you
>> >> have any lead dress problems, such as EMI/RFI, stray capacitance or
>> >> inductance, etc.? And, if so, wonder if installing ferrite beads on
>> >> the
>> >> leads would help.
>> >>
>> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> "She said it was either her or the ham radio. Over."
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: Shawnerz
>> >> To: rugrid-laptop@yahoogroups.com
>> >> Sent: Wednesday, October 17, 2012 12:52 PM
>> >> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >>
>> >>
>> >> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM.
>> >> Once I soldered the pins on, the module height would not allow the
>> >> cover
>> >> to go on.
>> >> Your results may vary,
>> >> -Shawn
>> >>
>> >>
>> >>
>> >> -------- Original message --------
>> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> From: "techtalklive@" <doug@>
>> >> To: RuGRiD-Laptop@yahoogroups.com
>> >> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >>
>> >>
>> >> Well that sounds promising. The only thing that would
>> >> top that would be a native SCSI attached to the bus connectors
>> >> in the accessory port. A ParPort one would do in the meantime.
>> >> Thanks!
>> >>
>> >> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
>> >> Anyone know the mem speed? Hate to take the thing apart right
>> >> now to find out.
>> >> Thanks!
>> >>
>> >> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
>> >> >
>> >> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked
>> >> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the
>> >> > mobo
>> >> > clocked down to 12.5 MHz.
>> >> >
>> >> > The problem with trying to access a higher capacity drive from the
>> >> > parallel port is that DOS is not capable of handling a large number
>> >> > of
>> >> > addresses. Of course, SCSI then is an option in doing that. I have a
>> >> > portable SCSI device which hooks into the parallel port made by
>> >> > Adaptec, called the Mini-SCSI which will allow the computer to
>> >> > connect
>> >> > to a larger drive such as a CDROM, large HDD, ZIP drive, or similar
>> >> > device by a SCSI-II connection. The SCSI connector has a parallel
>> >> > port
>> >> > on it that allows you to throughput a connection to your printer. I
>> >> > think that the maximum HDD capacity I can use with this thing is 2T.
>> >> >
>> >> > Phil
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
>> >> > >
>> >> > > I used to have all that stuff. Today I think I can run a dos
>> >> > > program
>> >> > > on the GRiD that talks to my trusty TotalCommander on another PC.
>> >> > > As I might have mentioned in another post, if I could get
>> >> > > another PC to appear as a mounted drive to the GRiD I'd be in
>> >> > > real fat city. Then I'd have the machine wide open to the rest of
>> >> > > the world.
>> >> > > Any ideas there?
>> >> > >
>> >> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> >> > > wrote:
>> >> > > >
>> >> > > > Good luck with the Backpack stuff.
>> >> > > >
>> >> > > > There's a book called "Hot Links", which was produced by the
>> >> > > > same
>> >> > > > people
>> >> > > > that produced LapLink. In the back of the book is a disk with
>> >> > > > programs that
>> >> > > > will let you transfer files, either via null modem cable or
>> >> > > > LapLink
>> >> > > > cable.
>> >> > > > I doubt that the book is still in print, but it might be
>> >> > > > something
>> >> > > > to look
>> >> > > > for. If you get the book without the disk, let me know, and
>> >> > > > I'll
>> >> > > > get you
>> >> > > > the software. I can't remember if it lets you map the host
>> >> > > > drive
>> >> > > > to the
>> >> > > > client machine, but that would be cool, if it does that.
>> >> > > >
>> >> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> > > > "She said it was either her or the ham radio. Over."
>> >> > > >
>> >> > > >
>> >> > > > ----- Original Message -----
>> >> > > > From: "techtalklive@" <doug@>
>> >> > > > To: <RuGRiD-Laptop@yahoogroups.com>
>> >> > > > Sent: Monday, October 15, 2012 10:47 PM
>> >> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> > > >
>> >> > > >
>> >> > > > > Its a 1530... clock is... I dont know 20Mhz?
>> >> > > > > Yes checking out Backpacks now. Just collected drivers from
>> >> > > > > around the web for them and am checking on ebay for
>> >> > > > > equipment. I suspect they will work.
>> >> > > > >
>> >> > > > > I thought I might take a look to see if there was parallel
>> >> > > > > port
>> >> > > > > software that would work like "laplink" to tether to another
>> >> > > > > PC
>> >> > > > > but would make a directory/drive on the the host PC appear as
>> >> > > > > a
>> >> > > > > drive to
>> >> > > > > the 1530.
>> >> > > > >
>> >> > > > > That would be cool... and avoid purchasing old hardware.
>> >> > > > >
>> >> > > > >
>> >> > > > >
>> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
>> >> > > > > <n8euj@>
>> >> > > > > wrote:
>> >> > > > >>
>> >> > > > >> What's the bus clock of the 1520, for example? If it's
>> >> > > > >> 10MHz,
>> >> > > > >> it *might*
>> >> > > > >> make it, but it would be breathing hard. As for parallel
>> >> > > > >> drives, see if
>> >> > > > >> you
>> >> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive
>> >> > > > >> that
>> >> > > > >> works off
>> >> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
>> >> > > > >>
>> >> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> > > > >> "She said it was either her or the ham radio. Over."
>> >> > > > >>
>> >> > > > >>
>> >> > > > >> ----- Original Message -----
>> >> > > > >> From: "techtalklive@" <doug@>
>> >> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
>> >> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
>> >> > > > >> modes?
>> >> > > > >>
>> >> > > > >>
>> >> > > > >> >
>> >> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has
>> >> > > > >> > limited
>> >> > > > >> > driver
>> >> > > > >> > support.
>> >> > > > >> > Other similar devices don't seem to be on the used market
>> >> > > > >> > right not.
>> >> > > > >> > I'm also considering a parallel based disk drive at this
>> >> > > > >> > point.
>> >> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
>> >> > > > >> > think... I
>> >> > > > >> > didn't
>> >> > > > >> > actually run the numbers.
>> >> > > > >> > DC
>> >> > > > >> >
>> >> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
>> >> > > > >> > <n8euj@> wrote:
>> >> > > > >> >>
>> >> > > > >> >> I don't think I'd even bother with the serial port. You
>> >> > > > >> >> might get
>> >> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs,
>> >> > > > >> >> but
>> >> > > > >> >> even a
>> >> > > > >> >> 16550AFN
>> >> > > > >> >> will only give you 115,200bps. And, if it's an
>> >> > > > >> >> 8250A/16450
>> >> > > > >> >> UART, you
>> >> > > > >> >> have
>> >> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
>> >> > > > >> >> standard
>> >> > > > >> >> parallel
>> >> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
>> >> > > > >> >> faster with
>> >> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of
>> >> > > > >> >> a
>> >> > > > >> >> GRiD, but
>> >> > > > >> >> even
>> >> > > > >> >> if you could directly tie in to the ISA bus, it would be
>> >> > > > >> >> tough.
>> >> > > > >> >>
>> >> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> > > > >> >> "She said it was either her or the ham radio. Over."
>> >> > > > >> >>
>> >> > > > >> >>
>> >> > > > >> >> ----- Original Message -----
>> >> > > > >> >> From: "Androgenoide" <androgenoide@>
>> >> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
>> >> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
>> >> > > > >> >> modes?
>> >> > > > >> >>
>> >> > > > >> >>
>> >> > > > >> >> > The only real obstacle to DOS networking with the Grid
>> >> > > > >> >> > is
>> >> > > > >> >> > finding an
>> >> > > > >> >> > Ethernet adapter that will work through either the
>> >> > > > >> >> > serial
>> >> > > > >> >> > or
>> >> > > > >> >> > parallel
>> >> > > > >> >> > ports. I used the Xircom on the parallel port because
>> >> > > > >> >> > I
>> >> > > > >> >> > had one at
>> >> > > > >> >> > the
>> >> > > > >> >> > time. I've got a serial device server now that would
>> >> > > > >> >> > probably work
>> >> > > > >> >> > too
>> >> > > > >> >> > but I've got too much going on at the moment to dig out
>> >> > > > >> >> > a
>> >> > > > >> >> > Grid just
>> >> > > > >> >> > to
>> >> > > > >> >> > see
>> >> > > > >> >> > what would be required. Either of those solutions
>> >> > > > >> >> > would
>> >> > > > >> >> > be limited
>> >> > > > >> >> > by
>> >> > > > >> >> > the speed of the ports(and the Grid itself), of course.
>> >> > > > >> >> > Gigabit
>> >> > > > >> >> > speeds
>> >> > > > >> >> > are out of the question!
>> >> > > > >> >> > Another thought... The guy who put together the Techworm
>> >> > > > >> >> > boot disk
>> >> > > > >> >> > also
>> >> > > > >> >> > had one called Networm, a single floppy that could do a
>> >> > > > >> >> > dialup
>> >> > > > >> >> > internet
>> >> > > > >> >> > connection... (if you still have access to a dialup
>> >> > > > >> >> > service... if
>> >> > > > >> >> > not,
>> >> > > > >> >> > Budget Dial Up has a prepaid service that allows you to
>> >> > > > >> >> > buy
>> >> > > > >> >> > just a
>> >> > > > >> >> > few
>> >> > > > >> >> > hours at a time).
>> >> > > > >> >> >
>> >> > > > >> >> > Generally speaking, if an old machine has either a
>> >> > > > >> >> > serial
>> >> > > > >> >> > or
>> >> > > > >> >> > parallel
>> >> > > > >> >> > port
>> >> > > > >> >> > and you can get it to boot into DOS, there is always a
>> >> > > > >> >> > way
>> >> > > > >> >> > to
>> >> > > > >> >> > transfer
>> >> > > > >> >> > files to another machine. Even if it has no floppy you
>> >> > > > >> >> > can use
>> >> > > > >> >> > another
>> >> > > > >> >> > DOS machine running Laplink. If it does have a floppy
>> >> > > > >> >> > there are a
>> >> > > > >> >> > lot
>> >> > > > >> >> > of
>> >> > > > >> >> > file transfer programs out there, from Kermit to the
>> >> > > > >> >> > original
>> >> > > > >> >> > version
>> >> > > > >> >> > of
>> >> > > > >> >> > Procomm that will fit on a single floppy.
>> >> > > > >> >> >
>> >> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of
>> >> > > > >> >> > RAM... a
>> >> > > > >> >> > full
>> >> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95
>> >> > > > >> >> > would
>> >> > > > >> >> > be
>> >> > > > >> >> > tricky
>> >> > > > >> >> > and
>> >> > > > >> >> > would require some hardware tweaks even to make a slow
>> >> > > > >> >> > machine...
>> >> > > > >> >> > kind
>> >> > > > >> >> > of
>> >> > > > >> >> > an extreme project. I've heard of a Linux distro that
>> >> > > > >> >> > will fit on
>> >> > > > >> >> > a
>> >> > > > >> >> > single floppy and run on systems with limited resources
>> >> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but
>> >> > > > >> >> > even that
>> >> > > > >> >> > one
>> >> > > > >> >> > seems to want 4MB of RAM.
>> >> > > > >> >> >
>> >> > > > >> >> > There are plenty of people on the web who have too much
>> >> > > > >> >> > time on
>> >> > > > >> >> > their
>> >> > > > >> >> > hands and are still playing with machines even older
>> >> > > > >> >> > than
>> >> > > > >> >> > the
>> >> > > > >> >> > Grid...
>> >> > > > >> >> > You
>> >> > > > >> >> > can still buy new after-market accessories for
>> >> > > > >> >> > Commodores,
>> >> > > > >> >> > for
>> >> > > > >> >> > example,
>> >> > > > >> >> > so
>> >> > > > >> >> > don't assume that there are no new solutions to old
>> >> > > > >> >> > problems.
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@>
>> >> > > > >> >> > wrote:
>> >> > > > >> >> >>
>> >> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> > > > >> >> >> >
>> >> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the
>> >> > > > >> >> >> > parallel
>> >> > > > >> >> >> > port
>> >> > > > >> >> >> > to
>> >> > > > >> >> >> > a NIC... although I've been wondering lately if it
>> >> > > > >> >> >> > might
>> >> > > > >> >> >> > not have
>> >> > > > >> >> >> > made
>> >> > > > >> >> >> > equally good sense to use a device server on the
>> >> > > > >> >> >> > serial
>> >> > > > >> >> >> > port...?
>> >> > > > >> >> >> > And,
>> >> > > > >> >> >> > of course, the Arachne browser... not many choices
>> >> > > > >> >> >> > for a
>> >> > > > >> >> >> > DOS
>> >> > > > >> >> >> > browser
>> >> > > > >> >> >> > are there? I used it to check my Yahoo web mail and
>> >> > > > >> >> >> > I'll
>> >> > > > >> >> >> > have to
>> >> > > > >> >> >> > say
>> >> > > > >> >> >> > that it gave a whole new dimension of meaning to the
>> >> > > > >> >> >> > word "slow."
>> >> > > > >> >> >> > Go
>> >> > > > >> >> >> > ahead, make a pot of tea while it's loading that
>> >> > > > >> >> >> > page,
>> >> > > > >> >> >> > it will be
>> >> > > > >> >> >> > a
>> >> > > > >> >> >> > while.
>> >> > > > >> >> >> >
>> >> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran
>> >> > > > >> >> >> > into a
>> >> > > > >> >> >> > web page
>> >> > > > >> >> >> > last
>> >> > > > >> >> >> > week of a guy who was competing with a friend to see
>> >> > > > >> >> >> > who
>> >> > > > >> >> >> > could
>> >> > > > >> >> >> > force
>> >> > > > >> >> >> > Windows XP to run with the least resources. It won't
>> >> > > > >> >> >> > install
>> >> > > > >> >> >> > unless
>> >> > > > >> >> >> > it
>> >> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor
>> >> > > > >> >> >> > but,
>> >> > > > >> >> >> > once
>> >> > > > >> >> >> > installed
>> >> > > > >> >> >> > you can remove RAM and underclock the machine... He
>> >> > > > >> >> >> > said
>> >> > > > >> >> >> > he got
>> >> > > > >> >> >> > one
>> >> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock
>> >> > > > >> >> >> > and
>> >> > > > >> >> >> > it took a
>> >> > > > >> >> >> > half
>> >> > > > >> >> >> > hour to boot.
>> >> > > > >> >> >> >
>> >> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I
>> >> > > > >> >> >> > have nothing
>> >> > > > >> >> >> > else
>> >> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can
>> >> > > > >> >> >> > get
>> >> > > > >> >> >> > online
>> >> > > > >> >> >> > with
>> >> > > > >> >> >> > a
>> >> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that
>> >> > > > >> >> >> > Contiki
>> >> > > > >> >> >> > OS/browser
>> >> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
>> >> > > > >> >> >> >
>> >> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "techtalklive@"
>> >> > > > >> >> >> > <doug@> wrote:
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> > > Like the hack job? :O
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone
>> >> > > > >> >> >> > > swapped
>> >> > > > >> >> >> > > screes?
>> >> > > > >> >> >> > > Should I take the kbd apart and clean it (will that
>> >> > > > >> >> >> > > likely
>> >> > > > >> >> >> > > fix it?) or look for a replacement?
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> > > So what can I do with this thing if I put more mem
>> >> > > > >> >> >> > > in
>> >> > > > >> >> >> > > it?
>> >> > > > >> >> >> > > Its all accessed funky through expaned mem methods,
>> >> > > > >> >> >> > > isn't it?
>> >> > > > >> >> >> > > I have a coprocessor I could put in this but not
>> >> > > > >> >> >> > > sure
>> >> > > > >> >> >> > > of
>> >> > > > >> >> >> > > the point there.
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> > > I think I might like to accomplish getting it on
>> >> > > > >> >> >> > > the
>> >> > > > >> >> >> > > web.
>> >> > > > >> >> >> > > I'd need the LAN hardware I guess.
>> >> > > > >> >> >> > > Any other ideas?
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
>> >> > > > >> >> >> > > contact on
>> >> > > > >> >> >> > > it that mate inside the cavity. But one of the two
>> >> > > > >> >> >> > > spring
>> >> > > > >> >> >> > > contacts
>> >> > > > >> >> >> > > inside is "rubberized", so only the one contact
>> >> > > > >> >> >> > > hits
>> >> > > > >> >> >> > > metal to
>> >> > > > >> >> >> > > metal.
>> >> > > > >> >> >> > > So the P.S. only works using the cord to go from
>> >> > > > >> >> >> > > the
>> >> > > > >> >> >> > > P.S. into
>> >> > > > >> >> >> > > the
>> >> > > > >> >> >> > > radial DC jack. Strange?
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> > > DC
>> >> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> > > > >> >> >> > <Jeriddian@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > Great job, Doug!
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of
>> >> > > > >> >> >> > > > these
>> >> > > > >> >> >> > > > beautiful
>> >> > > > >> >> >> > machines? And yep, that's the way it works.
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > Once you restore battery power to the 1287A, the
>> >> > > > >> >> >> > > > CMOS
>> >> > > > >> >> >> > > > registers
>> >> > > > >> >> >> > are again active. It's just that they're filled with
>> >> > > > >> >> >> > nonsense, so
>> >> > > > >> >> >> > the
>> >> > > > >> >> >> > computer tells you the clock had stopped (which it
>> >> > > > >> >> >> > did),
>> >> > > > >> >> >> > and
>> >> > > > >> >> >> > simply
>> >> > > > >> >> >> > prompts you to reset the time. Once you do that and
>> >> > > > >> >> >> > reboot,
>> >> > > > >> >> >> > everything's hunky-dory.
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > You can probably find some more 256K sticks
>> >> > > > >> >> >> > > > somewhere and
>> >> > > > >> >> >> > > > upgrade
>> >> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to
>> >> > > > >> >> >> > Ver.
>> >> > > > >> >> >> > 6.22.
>> >> > > > >> >> >> > Great
>> >> > > > >> >> >> > to
>> >> > > > >> >> >> > hear the HDD is good too.
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on
>> >> > > > >> >> >> > > > sale on ebay
>> >> > > > >> >> >> > > > that
>> >> > > > >> >> >> > I looked at, however it was strange. It was
>> >> > > > >> >> >> > definitely
>> >> > > > >> >> >> > branded a
>> >> > > > >> >> >> > 1520,
>> >> > > > >> >> >> > and advertised that way, but the flip up screen said
>> >> > > > >> >> >> > it
>> >> > > > >> >> >> > was a 386
>> >> > > > >> >> >> > machine. I decided to get it, and it was only about
>> >> > > > >> >> >> > $90
>> >> > > > >> >> >> > with
>> >> > > > >> >> >> > shipping.
>> >> > > > >> >> >> > When I got the machine, I was very excited when it
>> >> > > > >> >> >> > began
>> >> > > > >> >> >> > to post,
>> >> > > > >> >> >> > because I got a full 8MB of RAM! It of course
>> >> > > > >> >> >> > displayed
>> >> > > > >> >> >> > the
>> >> > > > >> >> >> > configuration error 02 indicating the CMOS battery
>> >> > > > >> >> >> > was
>> >> > > > >> >> >> > dead. So I
>> >> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
>> >> > > > >> >> >> > model, but
>> >> > > > >> >> >> > that
>> >> > > > >> >> >> > was
>> >> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I
>> >> > > > >> >> >> > had a
>> >> > > > >> >> >> > spare.
>> >> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard
>> >> > > > >> >> >> > off
>> >> > > > >> >> >> > to
>> >> > > > >> >> >> > discover
>> >> > > > >> >> >> > that not only was this really a 386 machine (a 1530),
>> >> > > > >> >> >> > but it also
>> >> > > > >> >> >> > had
>> >> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced
>> >> > > > >> >> >> > the
>> >> > > > >> >> >> > 1287A and
>> >> > > > >> >> >> > this
>> >> > > > >> >> >> > solved the configuration error just fine. But alas, I
>> >> > > > >> >> >> > didn't get
>> >> > > > >> >> >> > a
>> >> > > > >> >> >> > triple crown winner here. The Conner drive was
>> >> > > > >> >> >> > definitely dead.
>> >> > > > >> >> >> > But
>> >> > > > >> >> >> > heck, getting another HDD is easy compared to the
>> >> > > > >> >> >> > other
>> >> > > > >> >> >> > benefits!
>> >> > > > >> >> >> > The
>> >> > > > >> >> >> > original owner of this machine definitely took care
>> >> > > > >> >> >> > of
>> >> > > > >> >> >> > it.
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > Phil
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > > >
>> >> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
>> >> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and
>> >> > > > >> >> >> > > > > ran
>> >> > > > >> >> >> > > > > the wires
>> >> > > > >> >> >> > > > > to
>> >> > > > >> >> >> > > > > a
>> >> > > > >> >> >> > convenient place for the battery. Upon power up it
>> >> > > > >> >> >> > said
>> >> > > > >> >> >> > > > > that the RTC was stopped, and it needed
>> >> > > > >> >> >> > > > > setting.
>> >> > > > >> >> >> > > > > The "stopped" message threw me, I thought
>> >> > > > >> >> >> > > > > something was
>> >> > > > >> >> >> > > > > wrong
>> >> > > > >> >> >> > > > > with
>> >> > > > >> >> >> > > > > the chip. It took an F1 to continue and went
>> >> > > > >> >> >> > > > > right
>> >> > > > >> >> >> > > > > through
>> >> > > > >> >> >> > > > > POST
>> >> > > > >> >> >> > and Autoexec.
>> >> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory
>> >> > > > >> >> >> > > > > set
>> >> > > > >> >> >> > > > > the RTC.
>> >> > > > >> >> >> > > > > Now it boots cleanly.
>> >> > > > >> >> >> > > > > Has Lotus123 on the HD.
>> >> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"...
>> >> > > > >> >> >> > > > > page 2!
>> >> > > > >> >> >> > > > > The only remaining issue is that a few keys on
>> >> > > > >> >> >> > > > > the
>> >> > > > >> >> >> > > > > keyboard
>> >> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external
>> >> > > > >> >> >> > > > > kbd
>> >> > > > >> >> >> > > > > everything
>> >> > > > >> >> >> > > > > works.
>> >> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01
>> >> > > > >> >> >> > > > > 386
>> >> > > > >> >> >> > > > > with 1MB
>> >> > > > >> >> >> > > > > RAM,
>> >> > > > >> >> >> > > > > a
>> >> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some
>> >> > > > >> >> >> > smokin'
>> >> > > > >> >> >> > system!
>> >> > > > >> >> >> > > > >
>> >> > > > >> >> >> > > > >
>> >> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > > > >
>> >> > > > >> >> >> > > > > > Thanks so much that was great info. I had no
>> >> > > > >> >> >> > > > > > idea on the
>> >> > > > >> >> >> > > > > > X2
>> >> > > > >> >> >> > > > > > being a rating. May have to try it without
>> >> > > > >> >> >> > > > > > them
>> >> > > > >> >> >> > > > > > just to
>> >> > > > >> >> >> > > > > > make sure the rest of it is still good.
>> >> > > > >> >> >> > > > > >
>> >> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "fullsizewagon"
>> >> > > > >> >> >> > <andrebakken@> wrote:
>> >> > > > >> >> >> > > > > > >
>> >> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes
>> >> > > > >> >> >> > > > > > > a
>> >> > > > >> >> >> > > > > > > big
>> >> > > > >> >> >> > > > > > > difference.
>> >> > > > >> >> >> > The X2 also signifies they're an enhanced type meant
>> >> > > > >> >> >> > to
>> >> > > > >> >> >> > go
>> >> > > > >> >> >> > directly
>> >> > > > >> >> >> > across the mains. Be sure to get X2 rated
>> >> > > > >> >> >> > replacements.
>> >> > > > >> >> >> > > > > > > The PSU will work without those cap's in
>> >> > > > >> >> >> > > > > > > place, but
>> >> > > > >> >> >> > > > > > > will
>> >> > > > >> >> >> > radiate more interference/noise out onto the mains.
>> >> > > > >> >> >> > > > > > >
>> >> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > > > > > >
>> >> > > > >> >> >> > > > > > > > There are two in there that are the same.
>> >> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square
>> >> > > > >> >> >> > > > > > > > package.
>> >> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
>> >> > > > >> >> >> > > > > > > > radial shape.
>> >> > > > >> >> >> > > > > > > > I have them out already.
>> >> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
>> >> > > > >> >> >> > > > > > > >
>> >> > > > >> >> >> > > > > > > > DC
>> >> > > > >> >> >> > > > > ; > >
>> >> > > > >> >> >> > > > > > > >
>> >> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
>> >> > > > >> >> >> > <Jeriddian@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > Good Find, DC
>> >> > > > >> >> >> > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > I guess they got burnt to the point
>> >> > > > >> >> >> > > > > > > > > where
>> >> > > > >> >> >> > > > > > > > > you can't
>> >> > > > >> >> >> > identify the capcity amount. Could you give me the
>> >> > > > >> >> >> > output voltage
>> >> > > > >> >> >> > and
>> >> > > > >> >> >> > amperage? I'll look through my units and see if I can
>> >> > > > >> >> >> > identify
>> >> > > > >> >> >> > them
>> >> > > > >> >> >> > for you.
>> >> > > > >> >> >> > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > Phil
>> >> > > > >> >> >> > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like
>> >> > > > >> >> >> > > > > > > > > > a
>> >> > > > >> >> >> > > > > > > > > > failed cap
>> >> > > > >> >> >> > > > > > > > > > in
>> >> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
>> >> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
>> >> > > > >> >> >> > > > > > > > > > Any identification tips welcome,
>> >> > > > >> >> >> > > > > > > > > > thanks.
>> >> > > > >> >> >> > > > > > > > > > There appears to be two of the same
>> >> > > > >> >> >> > > > > > > > > > caps, would
>> >> > > > >> >> >> > replace both
>> >> > > > >> >> >> > > > > > > > > > of course.
>> >> > > > >> >> >> > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > > DC
>> >> > > > >> >> >> > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> > > > >> >> >> > wrote:
>> >> > > > >> >> >> > > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > > > I am considering tackling the
>> >> > > > >> >> >> > > > > > > > > > > repair
>> >> > > > >> >> >> > > > > > > > > > > of a 1530
>> >> > > > >> >> >> > > > > > > > > > > that
>> >> > > > >> >> >> > > > > > > > > > > does not respond to the power
>> >> > > > >> >> >> > > > > > > > > > > switch.
>> >> > > > >> >> >> > > > > > > > > > > The power
>> >> > > > >> >> >> > > > > > > > > > > supply
>> >> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think
>> >> > > > >> >> >> > > > > > > > > > > its
>> >> > > > >> >> >> > > > > > > > > > > fine
>> >> > > > >> >> >> > (unfortunately,
>> >> > > > >> >> >> > > > > > > > > > > that would have been an easy
>> >> > > > >> >> >> > > > > > > > > > > problem
>> >> > > > >> >> >> > > > > > > > > > > isolation!)
>> >> > > > >> >> >> > > > > > > > > > > So its something internal. I have
>> >> > > > >> >> >> > > > > > > > > > > the
>> >> > > > >> >> >> > > > > > > > > > > service
>> >> > > > >> >> >> > > > > > > > > > > manuals
>> >> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd
>> >> > > > >> >> >> > > > > > > > > > > get
>> >> > > > >> >> >> > > > > > > > > > > some
>> >> > > > >> >> >> > > > > > > > > > > pointers
>> >> > > > >> >> >> > form
>> >> > > > >> >> >> > > > > > > > > > > folks who have already performed
>> >> > > > >> >> >> > > > > > > > > > > cold
>> >> > > > >> >> >> > > > > > > > > > > stone
>> >> > > > >> >> >> > > > > > > > > > > dead
>> >> > > > >> >> >> > diagnosis.
>> >> > > > >> >> >> > > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this
>> >> > > > >> >> >> > > > > > > > > > > very clean
>> >> > > > >> >> >> > > > > > > > > > > 1530
>> >> > > > >> >> >> > > > > > > > > > > will
>> >> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
>> >> > > > >> >> >> > > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > > > Thanks in advance,
>> >> > > > >> >> >> > > > > > > > > > > DC
>> >> > > > >> >> >> > > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > > >
>> >> > > > >> >> >> > > > > > > > >
>> >> > > > >> >> >> > > > > > > >
>> >> > > > >> >> >> > > > > > >
>> >> > > > >> >> >> > > > > >
>> >> > > > >> >> >> > > > >
>> >> > > > >> >> >> > > >
>> >> > > > >> >> >> > >
>> >> > > > >> >> >> >
>> >> > > > >> >> >>
>> >> > > > >> >> >> Since we are on the topic of TCP does anyone have a
>> >> > > > >> >> >> formula stashed
>> >> > > > >> >> >> that
>> >> > > > >> >> >> can be easily had to run say serial (probably ppp) from
>> >> > > > >> >> >> something
>> >> > > > >> >> >> like
>> >> > > > >> >> >> a
>> >> > > > >> >> >> small system like the raspberry pi serially to a system
>> >> > > > >> >> >> with dos
>> >> > > > >> >> >> and a
>> >> > > > >> >> >> stack? It's been so long since I messed with dos
>> >> > > > >> >> >> environment
>> >> > > > >> >> >> networking
>> >> > > > >> >> >> I forget.
>> >> > > > >> >> >>
>> >> > > > >> >> >> I think windows of some sort had trumpet to handle part
>> >> > > > >> >> >> of
>> >> > > > >> >> >> the
>> >> > > > >> >> >> equation,
>> >> > > > >> >> >> but I don' t have any references right now over a dos
>> >> > > > >> >> >> stack.
>> >> > > > >> >> >>
>> >> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98
>> >> > > > >> >> >> would be
>> >> > > > >> >> >> better,
>> >> > > > >> >> >> but I don't know if the hardware here would be up to
>> >> > > > >> >> >> those
>> >> > > > >> >> >> os's.
>> >> > > > >> >> >>
>> >> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be
>> >> > > > >> >> >> nice too.
>> >> > > > >> >> >> I'm
>> >> > > > >> >> >> asking for everything here. Objective is to have
>> >> > > > >> >> >> something that
>> >> > > > >> >> >> could
>> >> > > > >> >> >> suck off or load a disk image with a floppy boot. I
>> >> > > > >> >> >> suspect it was
>> >> > > > >> >> >> a
>> >> > > > >> >> >> difficult thing to get going in the day, though, and
>> >> > > > >> >> >> even
>> >> > > > >> >> >> wors now.
>> >> > > > >> >> >>
>> >> > > > >> >> >> jim
>> >> > > > >> >> >> >
>> >> > > > >> >> >> > ,___
>> >> > > > >> >> >> >
>> >> > > > >> >> >>
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> > ------------------------------------
>> >> > > > >> >> >
>> >> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
>> >> > > > >> >> > Groups
>> >> > > > >> >> > Links
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >> >
>> >> > > > >> >>
>> >> > > > >> >
>> >> > > > >> >
>> >> > > > >> >
>> >> > > > >> >
>> >> > > > >> > ------------------------------------
>> >> > > > >> >
>> >> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
>> >> > Links
>> >> > > > >> >
>> >> > > > >> >
>> >> > > > >> >
>> >> > > > >>
>> >> > > > >
>> >> > > > >
>> >> > > > >
>> >> > > > >
>> >> > > > > ------------------------------------
>> >> > > > >
>> >> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
>> >> > > > > Links
>> >> > > > >
>> >> > > > >
>> >> > > > >
>> >> > > >
>> >> > >
>> >> >
>> >>
>> >>
>> >>
>> >>
>> >> ------------------------------------
>> >>
>> >> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Sun, 21 Oct 2012 18:34:29 -0000
From: "jeriddian"
Subject: Re: Typical 1500 series failure modes?
Accessing the bus might not be that hard. Shawn was able to hook up a regular ISA cable that had both the Master and Slave connectors, which he was using to try and boot the computer from a flash drive and it could see the regular hard drive, I believe. So theoretically you could use the second connnector for that purpose, but then again hooking up the AMI card is another matter. I do have a couple of 1535's which have the extended bus connector going through the bottom of the computer and hook up to an axternal bay compartment which fits under the bottom of the computer and can hook up two separate external cards like that. I've never messed with it though. They're also in storage right now, so I can't access them.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>
> I wonder if it would be possible to rig up an 8-bit ISA slot somewhere
> inside the 1530 so you could use one of those AMI cards. Finding one would
> be tough, though.
>
> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> "She said it was either her or the ham radio. Over."
>
>
> ----- Original Message -----
> From: "techtalklive@..." <doug@...>
> To: <RuGRiD-Laptop@yahoogroups.com>
> Sent: Saturday, October 20, 2012 10:40 PM
> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>
>
> > I'm going to take a shot at shoe-horning some low height 1MB SIMMs
> > in their. Let ya'll know how it goes.
> > That Megatrends card sounds familiar; I suspect I worried about
> > drive support way back in the day. Actually drive support
> > is also an issue with these 1530s.
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >>
> >> Wow. And, I suppose if you could find SIPPs from, say, Crucial or
> >> Corsair,
> >> they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
> >> printer I owned, and Crucial wanted about a buck and a half a meg. Yeah,
> >> that Paradox adapter would be swell. That may have gone the way of the
> >> $50
> >> card that American Megatrends used to make that would plug into any ISA
> >> slot
> >> and patch the BIOS so that you could use any size hard drive by any
> >> manufacturer. Lots of good ideas like that, but they just sort of faded
> >> away.
> >>
> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> "She said it was either her or the ham radio. Over."
> >>
> >>
> >> ----- Original Message -----
> >> From: "jeriddian" <Jeriddian@>
> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> Sent: Thursday, October 18, 2012 9:41 PM
> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >>
> >>
> >> > There was a company that at one time made an adaptation for the GRiD's
> >> > called paradox in which they made an adapter that fit into the pin
> >> > slots
> >> > (I think. I've never actually seen it, but this is what I heard) and
> >> > into
> >> > which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for
> >> > this,
> >> > but never found it. That would be cool to find and use.
> >> >
> >> > The problems with the memory adaptation is ther is very, very little
> >> > room
> >> > for the memory to fit. The MoBo was actually designed to fit the
> >> > smallest
> >> > RAM stick they made at the time. You have to use a low profile SIPP,
> >> > one
> >> > with no extra PC Board material off to the sides. You could try laying
> >> > the
> >> > wired SIMM's over, but I looked at trying to do that with high profile
> >> > SIPP's and there really isn't any room to do that either. I think if
> >> > someone coud come up with an adapter like the paradox I described that
> >> > fit
> >> > 2 4 MB sticks to run in the eight rows of holes, that would likely be
> >> > the
> >> > best answer.
> >> >
> >> > Phil
> >> >
> >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >> >>
> >> >> If you made the leads long enough to lay the SIMMs over on their side,
> >> >> and insulated them so that they wouldn't short anything out, would you
> >> >> have any lead dress problems, such as EMI/RFI, stray capacitance or
> >> >> inductance, etc.? And, if so, wonder if installing ferrite beads on
> >> >> the
> >> >> leads would help.
> >> >>
> >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> >> "She said it was either her or the ham radio. Over."
> >> >>
> >> >>
> >> >> ----- Original Message -----
> >> >> From: Shawnerz
> >> >> To: rugrid-laptop@yahoogroups.com
> >> >> Sent: Wednesday, October 17, 2012 12:52 PM
> >> >> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM.
> >> >> Once I soldered the pins on, the module height would not allow the
> >> >> cover
> >> >> to go on.
> >> >> Your results may vary,
> >> >> -Shawn
> >> >>
> >> >>
> >> >>
> >> >> -------- Original message --------
> >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> >> From: "techtalklive@" <doug@>
> >> >> To: RuGRiD-Laptop@yahoogroups.com
> >> >> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> Well that sounds promising. The only thing that would
> >> >> top that would be a native SCSI attached to the bus connectors
> >> >> in the accessory port. A ParPort one would do in the meantime.
> >> >> Thanks!
> >> >>
> >> >> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> >> >> Anyone know the mem speed? Hate to take the thing apart right
> >> >> now to find out.
> >> >> Thanks!
> >> >>
> >> >> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >> >> >
> >> >> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked
> >> >> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the
> >> >> > mobo
> >> >> > clocked down to 12.5 MHz.
> >> >> >
> >> >> > The problem with trying to access a higher capacity drive from the
> >> >> > parallel port is that DOS is not capable of handling a large number
> >> >> > of
> >> >> > addresses. Of course, SCSI then is an option in doing that. I have a
> >> >> > portable SCSI device which hooks into the parallel port made by
> >> >> > Adaptec, called the Mini-SCSI which will allow the computer to
> >> >> > connect
> >> >> > to a larger drive such as a CDROM, large HDD, ZIP drive, or similar
> >> >> > device by a SCSI-II connection. The SCSI connector has a parallel
> >> >> > port
> >> >> > on it that allows you to throughput a connection to your printer. I
> >> >> > think that the maximum HDD capacity I can use with this thing is 2T.
> >> >> >
> >> >> > Phil
> >> >> >
> >> >> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >> >> > >
> >> >> > > I used to have all that stuff. Today I think I can run a dos
> >> >> > > program
> >> >> > > on the GRiD that talks to my trusty TotalCommander on another PC.
> >> >> > > As I might have mentioned in another post, if I could get
> >> >> > > another PC to appear as a mounted drive to the GRiD I'd be in
> >> >> > > real fat city. Then I'd have the machine wide open to the rest of
> >> >> > > the world.
> >> >> > > Any ideas there?
> >> >> > >
> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
> >> >> > > wrote:
> >> >> > > >
> >> >> > > > Good luck with the Backpack stuff.
> >> >> > > >
> >> >> > > > There's a book called "Hot Links", which was produced by the
> >> >> > > > same
> >> >> > > > people
> >> >> > > > that produced LapLink. In the back of the book is a disk with
> >> >> > > > programs that
> >> >> > > > will let you transfer files, either via null modem cable or
> >> >> > > > LapLink
> >> >> > > > cable.
> >> >> > > > I doubt that the book is still in print, but it might be
> >> >> > > > something
> >> >> > > > to look
> >> >> > > > for. If you get the book without the disk, let me know, and
> >> >> > > > I'll
> >> >> > > > get you
> >> >> > > > the software. I can't remember if it lets you map the host
> >> >> > > > drive
> >> >> > > > to the
> >> >> > > > client machine, but that would be cool, if it does that.
> >> >> > > >
> >> >> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> >> > > > "She said it was either her or the ham radio. Over."
> >> >> > > >
> >> >> > > >
> >> >> > > > ----- Original Message -----
> >> >> > > > From: "techtalklive@" <doug@>
> >> >> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> >> >> > > > Sent: Monday, October 15, 2012 10:47 PM
> >> >> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >> >> > > >
> >> >> > > >
> >> >> > > > > Its a 1530... clock is... I dont know 20Mhz?
> >> >> > > > > Yes checking out Backpacks now. Just collected drivers from
> >> >> > > > > around the web for them and am checking on ebay for
> >> >> > > > > equipment. I suspect they will work.
> >> >> > > > >
> >> >> > > > > I thought I might take a look to see if there was parallel
> >> >> > > > > port
> >> >> > > > > software that would work like "laplink" to tether to another
> >> >> > > > > PC
> >> >> > > > > but would make a directory/drive on the the host PC appear as
> >> >> > > > > a
> >> >> > > > > drive to
> >> >> > > > > the 1530.
> >> >> > > > >
> >> >> > > > > That would be cool... and avoid purchasing old hardware.
> >> >> > > > >
> >> >> > > > >
> >> >> > > > >
> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> >> >> > > > > <n8euj@>
> >> >> > > > > wrote:
> >> >> > > > >>
> >> >> > > > >> What's the bus clock of the 1520, for example? If it's
> >> >> > > > >> 10MHz,
> >> >> > > > >> it *might*
> >> >> > > > >> make it, but it would be breathing hard. As for parallel
> >> >> > > > >> drives, see if
> >> >> > > > >> you
> >> >> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive
> >> >> > > > >> that
> >> >> > > > >> works off
> >> >> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> >> >> > > > >>
> >> >> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> >> > > > >> "She said it was either her or the ham radio. Over."
> >> >> > > > >>
> >> >> > > > >>
> >> >> > > > >> ----- Original Message -----
> >> >> > > > >> From: "techtalklive@" <doug@>
> >> >> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> >> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> >> >> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> >> >> > > > >> modes?
> >> >> > > > >>
> >> >> > > > >>
> >> >> > > > >> >
> >> >> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has
> >> >> > > > >> > limited
> >> >> > > > >> > driver
> >> >> > > > >> > support.
> >> >> > > > >> > Other similar devices don't seem to be on the used market
> >> >> > > > >> > right not.
> >> >> > > > >> > I'm also considering a parallel based disk drive at this
> >> >> > > > >> > point.
> >> >> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
> >> >> > > > >> > think... I
> >> >> > > > >> > didn't
> >> >> > > > >> > actually run the numbers.
> >> >> > > > >> > DC
> >> >> > > > >> >
> >> >> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> >> >> > > > >> > <n8euj@> wrote:
> >> >> > > > >> >>
> >> >> > > > >> >> I don't think I'd even bother with the serial port. You
> >> >> > > > >> >> might get
> >> >> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs,
> >> >> > > > >> >> but
> >> >> > > > >> >> even a
> >> >> > > > >> >> 16550AFN
> >> >> > > > >> >> will only give you 115,200bps. And, if it's an
> >> >> > > > >> >> 8250A/16450
> >> >> > > > >> >> UART, you
> >> >> > > > >> >> have
> >> >> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
> >> >> > > > >> >> standard
> >> >> > > > >> >> parallel
> >> >> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
> >> >> > > > >> >> faster with
> >> >> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of
> >> >> > > > >> >> a
> >> >> > > > >> >> GRiD, but
> >> >> > > > >> >> even
> >> >> > > > >> >> if you could directly tie in to the ISA bus, it would be
> >> >> > > > >> >> tough.
> >> >> > > > >> >>
> >> >> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> >> >> > > > >> >> "She said it was either her or the ham radio. Over."
> >> >> > > > >> >>
> >> >> > > > >> >>
> >> >> > > > >> >> ----- Original Message -----
> >> >> > > > >> >> From: "Androgenoide" <androgenoide@>
> >> >> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> >> >> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> >> >> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> >> >> > > > >> >> modes?
> >> >> > > > >> >>
> >> >> > > > >> >>
> >> >> > > > >> >> > The only real obstacle to DOS networking with the Grid
> >> >> > > > >> >> > is
> >> >> > > > >> >> > finding an
> >> >> > > > >> >> > Ethernet adapter that will work through either the
> >> >> > > > >> >> > serial
> >> >> > > > >> >> > or
> >> >> > > > >> >> > parallel
> >> >> > > > >> >> > ports. I used the Xircom on the parallel port because
> >> >> > > > >> >> > I
> >> >> > > > >> >> > had one at
> >> >> > > > >> >> > the
> >> >> > > > >> >> > time. I've got a serial device server now that would
> >> >> > > > >> >> > probably work
> >> >> > > > >> >> > too
> >> >> > > > >> >> > but I've got too much going on at the moment to dig out
> >> >> > > > >> >> > a
> >> >> > > > >> >> > Grid just
> >> >> > > > >> >> > to
> >> >> > > > >> >> > see
> >> >> > > > >> >> > what would be required. Either of those solutions
> >> >> > > > >> >> > would
> >> >> > > > >> >> > be limited
> >> >> > > > >> >> > by
> >> >> > > > >> >> > the speed of the ports(and the Grid itself), of course.
> >> >> > > > >> >> > Gigabit
> >> >> > > > >> >> > speeds
> >> >> > > > >> >> > are out of the question!
> >> >> > > > >> >> > Another thought... The guy who put together the Techworm
> >> >> > > > >> >> > boot disk
> >> >> > > > >> >> > also
> >> >> > > > >> >> > had one called Networm, a single floppy that could do a
> >> >> > > > >> >> > dialup
> >> >> > > > >> >> > internet
> >> >> > > > >> >> > connection... (if you still have access to a dialup
> >> >> > > > >> >> > service... if
> >> >> > > > >> >> > not,
> >> >> > > > >> >> > Budget Dial Up has a prepaid service that allows you to
> >> >> > > > >> >> > buy
> >> >> > > > >> >> > just a
> >> >> > > > >> >> > few
> >> >> > > > >> >> > hours at a time).
> >> >> > > > >> >> >
> >> >> > > > >> >> > Generally speaking, if an old machine has either a
> >> >> > > > >> >> > serial
> >> >> > > > >> >> > or
> >> >> > > > >> >> > parallel
> >> >> > > > >> >> > port
> >> >> > > > >> >> > and you can get it to boot into DOS, there is always a
> >> >> > > > >> >> > way
> >> >> > > > >> >> > to
> >> >> > > > >> >> > transfer
> >> >> > > > >> >> > files to another machine. Even if it has no floppy you
> >> >> > > > >> >> > can use
> >> >> > > > >> >> > another
> >> >> > > > >> >> > DOS machine running Laplink. If it does have a floppy
> >> >> > > > >> >> > there are a
> >> >> > > > >> >> > lot
> >> >> > > > >> >> > of
> >> >> > > > >> >> > file transfer programs out there, from Kermit to the
> >> >> > > > >> >> > original
> >> >> > > > >> >> > version
> >> >> > > > >> >> > of
> >> >> > > > >> >> > Procomm that will fit on a single floppy.
> >> >> > > > >> >> >
> >> >> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of
> >> >> > > > >> >> > RAM... a
> >> >> > > > >> >> > full
> >> >> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95
> >> >> > > > >> >> > would
> >> >> > > > >> >> > be
> >> >> > > > >> >> > tricky
> >> >> > > > >> >> > and
> >> >> > > > >> >> > would require some hardware tweaks even to make a slow
> >> >> > > > >> >> > machine...
> >> >> > > > >> >> > kind
> >> >> > > > >> >> > of
> >> >> > > > >> >> > an extreme project. I've heard of a Linux distro that
> >> >> > > > >> >> > will fit on
> >> >> > > > >> >> > a
> >> >> > > > >> >> > single floppy and run on systems with limited resources
> >> >> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but
> >> >> > > > >> >> > even that
> >> >> > > > >> >> > one
> >> >> > > > >> >> > seems to want 4MB of RAM.
> >> >> > > > >> >> >
> >> >> > > > >> >> > There are plenty of people on the web who have too much
> >> >> > > > >> >> > time on
> >> >> > > > >> >> > their
> >> >> > > > >> >> > hands and are still playing with machines even older
> >> >> > > > >> >> > than
> >> >> > > > >> >> > the
> >> >> > > > >> >> > Grid...
> >> >> > > > >> >> > You
> >> >> > > > >> >> > can still buy new after-market accessories for
> >> >> > > > >> >> > Commodores,
> >> >> > > > >> >> > for
> >> >> > > > >> >> > example,
> >> >> > > > >> >> > so
> >> >> > > > >> >> > don't assume that there are no new solutions to old
> >> >> > > > >> >> > problems.
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@>
> >> >> > > > >> >> > wrote:
> >> >> > > > >> >> >>
> >> >> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the
> >> >> > > > >> >> >> > parallel
> >> >> > > > >> >> >> > port
> >> >> > > > >> >> >> > to
> >> >> > > > >> >> >> > a NIC... although I've been wondering lately if it
> >> >> > > > >> >> >> > might
> >> >> > > > >> >> >> > not have
> >> >> > > > >> >> >> > made
> >> >> > > > >> >> >> > equally good sense to use a device server on the
> >> >> > > > >> >> >> > serial
> >> >> > > > >> >> >> > port...?
> >> >> > > > >> >> >> > And,
> >> >> > > > >> >> >> > of course, the Arachne browser... not many choices
> >> >> > > > >> >> >> > for a
> >> >> > > > >> >> >> > DOS
> >> >> > > > >> >> >> > browser
> >> >> > > > >> >> >> > are there? I used it to check my Yahoo web mail and
> >> >> > > > >> >> >> > I'll
> >> >> > > > >> >> >> > have to
> >> >> > > > >> >> >> > say
> >> >> > > > >> >> >> > that it gave a whole new dimension of meaning to the
> >> >> > > > >> >> >> > word "slow."
> >> >> > > > >> >> >> > Go
> >> >> > > > >> >> >> > ahead, make a pot of tea while it's loading that
> >> >> > > > >> >> >> > page,
> >> >> > > > >> >> >> > it will be
> >> >> > > > >> >> >> > a
> >> >> > > > >> >> >> > while.
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran
> >> >> > > > >> >> >> > into a
> >> >> > > > >> >> >> > web page
> >> >> > > > >> >> >> > last
> >> >> > > > >> >> >> > week of a guy who was competing with a friend to see
> >> >> > > > >> >> >> > who
> >> >> > > > >> >> >> > could
> >> >> > > > >> >> >> > force
> >> >> > > > >> >> >> > Windows XP to run with the least resources. It won't
> >> >> > > > >> >> >> > install
> >> >> > > > >> >> >> > unless
> >> >> > > > >> >> >> > it
> >> >> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor
> >> >> > > > >> >> >> > but,
> >> >> > > > >> >> >> > once
> >> >> > > > >> >> >> > installed
> >> >> > > > >> >> >> > you can remove RAM and underclock the machine... He
> >> >> > > > >> >> >> > said
> >> >> > > > >> >> >> > he got
> >> >> > > > >> >> >> > one
> >> >> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock
> >> >> > > > >> >> >> > and
> >> >> > > > >> >> >> > it took a
> >> >> > > > >> >> >> > half
> >> >> > > > >> >> >> > hour to boot.
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I
> >> >> > > > >> >> >> > have nothing
> >> >> > > > >> >> >> > else
> >> >> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can
> >> >> > > > >> >> >> > get
> >> >> > > > >> >> >> > online
> >> >> > > > >> >> >> > with
> >> >> > > > >> >> >> > a
> >> >> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that
> >> >> > > > >> >> >> > Contiki
> >> >> > > > >> >> >> > OS/browser
> >> >> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "techtalklive@"
> >> >> > > > >> >> >> > <doug@> wrote:
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> > > Like the hack job? :O
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone
> >> >> > > > >> >> >> > > swapped
> >> >> > > > >> >> >> > > screes?
> >> >> > > > >> >> >> > > Should I take the kbd apart and clean it (will that
> >> >> > > > >> >> >> > > likely
> >> >> > > > >> >> >> > > fix it?) or look for a replacement?
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> > > So what can I do with this thing if I put more mem
> >> >> > > > >> >> >> > > in
> >> >> > > > >> >> >> > > it?
> >> >> > > > >> >> >> > > Its all accessed funky through expaned mem methods,
> >> >> > > > >> >> >> > > isn't it?
> >> >> > > > >> >> >> > > I have a coprocessor I could put in this but not
> >> >> > > > >> >> >> > > sure
> >> >> > > > >> >> >> > > of
> >> >> > > > >> >> >> > > the point there.
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> > > I think I might like to accomplish getting it on
> >> >> > > > >> >> >> > > the
> >> >> > > > >> >> >> > > web.
> >> >> > > > >> >> >> > > I'd need the LAN hardware I guess.
> >> >> > > > >> >> >> > > Any other ideas?
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
> >> >> > > > >> >> >> > > contact on
> >> >> > > > >> >> >> > > it that mate inside the cavity. But one of the two
> >> >> > > > >> >> >> > > spring
> >> >> > > > >> >> >> > > contacts
> >> >> > > > >> >> >> > > inside is "rubberized", so only the one contact
> >> >> > > > >> >> >> > > hits
> >> >> > > > >> >> >> > > metal to
> >> >> > > > >> >> >> > > metal.
> >> >> > > > >> >> >> > > So the P.S. only works using the cord to go from
> >> >> > > > >> >> >> > > the
> >> >> > > > >> >> >> > > P.S. into
> >> >> > > > >> >> >> > > the
> >> >> > > > >> >> >> > > radial DC jack. Strange?
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> > > DC
> >> >> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> >> >> > > > >> >> >> > <Jeriddian@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > Great job, Doug!
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of
> >> >> > > > >> >> >> > > > these
> >> >> > > > >> >> >> > > > beautiful
> >> >> > > > >> >> >> > machines? And yep, that's the way it works.
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > Once you restore battery power to the 1287A, the
> >> >> > > > >> >> >> > > > CMOS
> >> >> > > > >> >> >> > > > registers
> >> >> > > > >> >> >> > are again active. It's just that they're filled with
> >> >> > > > >> >> >> > nonsense, so
> >> >> > > > >> >> >> > the
> >> >> > > > >> >> >> > computer tells you the clock had stopped (which it
> >> >> > > > >> >> >> > did),
> >> >> > > > >> >> >> > and
> >> >> > > > >> >> >> > simply
> >> >> > > > >> >> >> > prompts you to reset the time. Once you do that and
> >> >> > > > >> >> >> > reboot,
> >> >> > > > >> >> >> > everything's hunky-dory.
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > You can probably find some more 256K sticks
> >> >> > > > >> >> >> > > > somewhere and
> >> >> > > > >> >> >> > > > upgrade
> >> >> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to
> >> >> > > > >> >> >> > Ver.
> >> >> > > > >> >> >> > 6.22.
> >> >> > > > >> >> >> > Great
> >> >> > > > >> >> >> > to
> >> >> > > > >> >> >> > hear the HDD is good too.
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on
> >> >> > > > >> >> >> > > > sale on ebay
> >> >> > > > >> >> >> > > > that
> >> >> > > > >> >> >> > I looked at, however it was strange. It was
> >> >> > > > >> >> >> > definitely
> >> >> > > > >> >> >> > branded a
> >> >> > > > >> >> >> > 1520,
> >> >> > > > >> >> >> > and advertised that way, but the flip up screen said
> >> >> > > > >> >> >> > it
> >> >> > > > >> >> >> > was a 386
> >> >> > > > >> >> >> > machine. I decided to get it, and it was only about
> >> >> > > > >> >> >> > $90
> >> >> > > > >> >> >> > with
> >> >> > > > >> >> >> > shipping.
> >> >> > > > >> >> >> > When I got the machine, I was very excited when it
> >> >> > > > >> >> >> > began
> >> >> > > > >> >> >> > to post,
> >> >> > > > >> >> >> > because I got a full 8MB of RAM! It of course
> >> >> > > > >> >> >> > displayed
> >> >> > > > >> >> >> > the
> >> >> > > > >> >> >> > configuration error 02 indicating the CMOS battery
> >> >> > > > >> >> >> > was
> >> >> > > > >> >> >> > dead. So I
> >> >> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
> >> >> > > > >> >> >> > model, but
> >> >> > > > >> >> >> > that
> >> >> > > > >> >> >> > was
> >> >> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I
> >> >> > > > >> >> >> > had a
> >> >> > > > >> >> >> > spare.
> >> >> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard
> >> >> > > > >> >> >> > off
> >> >> > > > >> >> >> > to
> >> >> > > > >> >> >> > discover
> >> >> > > > >> >> >> > that not only was this really a 386 machine (a 1530),
> >> >> > > > >> >> >> > but it also
> >> >> > > > >> >> >> > had
> >> >> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced
> >> >> > > > >> >> >> > the
> >> >> > > > >> >> >> > 1287A and
> >> >> > > > >> >> >> > this
> >> >> > > > >> >> >> > solved the configuration error just fine. But alas, I
> >> >> > > > >> >> >> > didn't get
> >> >> > > > >> >> >> > a
> >> >> > > > >> >> >> > triple crown winner here. The Conner drive was
> >> >> > > > >> >> >> > definitely dead.
> >> >> > > > >> >> >> > But
> >> >> > > > >> >> >> > heck, getting another HDD is easy compared to the
> >> >> > > > >> >> >> > other
> >> >> > > > >> >> >> > benefits!
> >> >> > > > >> >> >> > The
> >> >> > > > >> >> >> > original owner of this machine definitely took care
> >> >> > > > >> >> >> > of
> >> >> > > > >> >> >> > it.
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > Phil
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > > >
> >> >> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> >> >> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and
> >> >> > > > >> >> >> > > > > ran
> >> >> > > > >> >> >> > > > > the wires
> >> >> > > > >> >> >> > > > > to
> >> >> > > > >> >> >> > > > > a
> >> >> > > > >> >> >> > convenient place for the battery. Upon power up it
> >> >> > > > >> >> >> > said
> >> >> > > > >> >> >> > > > > that the RTC was stopped, and it needed
> >> >> > > > >> >> >> > > > > setting.
> >> >> > > > >> >> >> > > > > The "stopped" message threw me, I thought
> >> >> > > > >> >> >> > > > > something was
> >> >> > > > >> >> >> > > > > wrong
> >> >> > > > >> >> >> > > > > with
> >> >> > > > >> >> >> > > > > the chip. It took an F1 to continue and went
> >> >> > > > >> >> >> > > > > right
> >> >> > > > >> >> >> > > > > through
> >> >> > > > >> >> >> > > > > POST
> >> >> > > > >> >> >> > and Autoexec.
> >> >> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory
> >> >> > > > >> >> >> > > > > set
> >> >> > > > >> >> >> > > > > the RTC.
> >> >> > > > >> >> >> > > > > Now it boots cleanly.
> >> >> > > > >> >> >> > > > > Has Lotus123 on the HD.
> >> >> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"...
> >> >> > > > >> >> >> > > > > page 2!
> >> >> > > > >> >> >> > > > > The only remaining issue is that a few keys on
> >> >> > > > >> >> >> > > > > the
> >> >> > > > >> >> >> > > > > keyboard
> >> >> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external
> >> >> > > > >> >> >> > > > > kbd
> >> >> > > > >> >> >> > > > > everything
> >> >> > > > >> >> >> > > > > works.
> >> >> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01
> >> >> > > > >> >> >> > > > > 386
> >> >> > > > >> >> >> > > > > with 1MB
> >> >> > > > >> >> >> > > > > RAM,
> >> >> > > > >> >> >> > > > > a
> >> >> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some
> >> >> > > > >> >> >> > smokin'
> >> >> > > > >> >> >> > system!
> >> >> > > > >> >> >> > > > >
> >> >> > > > >> >> >> > > > >
> >> >> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > > > >
> >> >> > > > >> >> >> > > > > > Thanks so much that was great info. I had no
> >> >> > > > >> >> >> > > > > > idea on the
> >> >> > > > >> >> >> > > > > > X2
> >> >> > > > >> >> >> > > > > > being a rating. May have to try it without
> >> >> > > > >> >> >> > > > > > them
> >> >> > > > >> >> >> > > > > > just to
> >> >> > > > >> >> >> > > > > > make sure the rest of it is still good.
> >> >> > > > >> >> >> > > > > >
> >> >> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "fullsizewagon"
> >> >> > > > >> >> >> > <andrebakken@> wrote:
> >> >> > > > >> >> >> > > > > > >
> >> >> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes
> >> >> > > > >> >> >> > > > > > > a
> >> >> > > > >> >> >> > > > > > > big
> >> >> > > > >> >> >> > > > > > > difference.
> >> >> > > > >> >> >> > The X2 also signifies they're an enhanced type meant
> >> >> > > > >> >> >> > to
> >> >> > > > >> >> >> > go
> >> >> > > > >> >> >> > directly
> >> >> > > > >> >> >> > across the mains. Be sure to get X2 rated
> >> >> > > > >> >> >> > replacements.
> >> >> > > > >> >> >> > > > > > > The PSU will work without those cap's in
> >> >> > > > >> >> >> > > > > > > place, but
> >> >> > > > >> >> >> > > > > > > will
> >> >> > > > >> >> >> > radiate more interference/noise out onto the mains.
> >> >> > > > >> >> >> > > > > > >
> >> >> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > > > > > >
> >> >> > > > >> >> >> > > > > > > > There are two in there that are the same.
> >> >> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> >> >> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square
> >> >> > > > >> >> >> > > > > > > > package.
> >> >> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
> >> >> > > > >> >> >> > > > > > > > radial shape.
> >> >> > > > >> >> >> > > > > > > > I have them out already.
> >> >> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> >> >> > > > >> >> >> > > > > > > >
> >> >> > > > >> >> >> > > > > > > > DC
> >> >> > > > >> >> >> > > > > ; > >
> >> >> > > > >> >> >> > > > > > > >
> >> >> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> >> >> > > > >> >> >> > <Jeriddian@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > Good Find, DC
> >> >> > > > >> >> >> > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > I guess they got burnt to the point
> >> >> > > > >> >> >> > > > > > > > > where
> >> >> > > > >> >> >> > > > > > > > > you can't
> >> >> > > > >> >> >> > identify the capcity amount. Could you give me the
> >> >> > > > >> >> >> > output voltage
> >> >> > > > >> >> >> > and
> >> >> > > > >> >> >> > amperage? I'll look through my units and see if I can
> >> >> > > > >> >> >> > identify
> >> >> > > > >> >> >> > them
> >> >> > > > >> >> >> > for you.
> >> >> > > > >> >> >> > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > Phil
> >> >> > > > >> >> >> > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like
> >> >> > > > >> >> >> > > > > > > > > > a
> >> >> > > > >> >> >> > > > > > > > > > failed cap
> >> >> > > > >> >> >> > > > > > > > > > in
> >> >> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> >> >> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> >> >> > > > >> >> >> > > > > > > > > > Any identification tips welcome,
> >> >> > > > >> >> >> > > > > > > > > > thanks.
> >> >> > > > >> >> >> > > > > > > > > > There appears to be two of the same
> >> >> > > > >> >> >> > > > > > > > > > caps, would
> >> >> > > > >> >> >> > replace both
> >> >> > > > >> >> >> > > > > > > > > > of course.
> >> >> > > > >> >> >> > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > > DC
> >> >> > > > >> >> >> > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> >> >> > > > >> >> >> > "techtalklive@" <doug@>
> >> >> > > > >> >> >> > wrote:
> >> >> > > > >> >> >> > > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > > > I am considering tackling the
> >> >> > > > >> >> >> > > > > > > > > > > repair
> >> >> > > > >> >> >> > > > > > > > > > > of a 1530
> >> >> > > > >> >> >> > > > > > > > > > > that
> >> >> > > > >> >> >> > > > > > > > > > > does not respond to the power
> >> >> > > > >> >> >> > > > > > > > > > > switch.
> >> >> > > > >> >> >> > > > > > > > > > > The power
> >> >> > > > >> >> >> > > > > > > > > > > supply
> >> >> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think
> >> >> > > > >> >> >> > > > > > > > > > > its
> >> >> > > > >> >> >> > > > > > > > > > > fine
> >> >> > > > >> >> >> > (unfortunately,
> >> >> > > > >> >> >> > > > > > > > > > > that would have been an easy
> >> >> > > > >> >> >> > > > > > > > > > > problem
> >> >> > > > >> >> >> > > > > > > > > > > isolation!)
> >> >> > > > >> >> >> > > > > > > > > > > So its something internal. I have
> >> >> > > > >> >> >> > > > > > > > > > > the
> >> >> > > > >> >> >> > > > > > > > > > > service
> >> >> > > > >> >> >> > > > > > > > > > > manuals
> >> >> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd
> >> >> > > > >> >> >> > > > > > > > > > > get
> >> >> > > > >> >> >> > > > > > > > > > > some
> >> >> > > > >> >> >> > > > > > > > > > > pointers
> >> >> > > > >> >> >> > form
> >> >> > > > >> >> >> > > > > > > > > > > folks who have already performed
> >> >> > > > >> >> >> > > > > > > > > > > cold
> >> >> > > > >> >> >> > > > > > > > > > > stone
> >> >> > > > >> >> >> > > > > > > > > > > dead
> >> >> > > > >> >> >> > diagnosis.
> >> >> > > > >> >> >> > > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this
> >> >> > > > >> >> >> > > > > > > > > > > very clean
> >> >> > > > >> >> >> > > > > > > > > > > 1530
> >> >> > > > >> >> >> > > > > > > > > > > will
> >> >> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> >> >> > > > >> >> >> > > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> >> >> > > > >> >> >> > > > > > > > > > > DC
> >> >> > > > >> >> >> > > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > > >
> >> >> > > > >> >> >> > > > > > > > >
> >> >> > > > >> >> >> > > > > > > >
> >> >> > > > >> >> >> > > > > > >
> >> >> > > > >> >> >> > > > > >
> >> >> > > > >> >> >> > > > >
> >> >> > > > >> >> >> > > >
> >> >> > > > >> >> >> > >
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >>
> >> >> > > > >> >> >> Since we are on the topic of TCP does anyone have a
> >> >> > > > >> >> >> formula stashed
> >> >> > > > >> >> >> that
> >> >> > > > >> >> >> can be easily had to run say serial (probably ppp) from
> >> >> > > > >> >> >> something
> >> >> > > > >> >> >> like
> >> >> > > > >> >> >> a
> >> >> > > > >> >> >> small system like the raspberry pi serially to a system
> >> >> > > > >> >> >> with dos
> >> >> > > > >> >> >> and a
> >> >> > > > >> >> >> stack? It's been so long since I messed with dos
> >> >> > > > >> >> >> environment
> >> >> > > > >> >> >> networking
> >> >> > > > >> >> >> I forget.
> >> >> > > > >> >> >>
> >> >> > > > >> >> >> I think windows of some sort had trumpet to handle part
> >> >> > > > >> >> >> of
> >> >> > > > >> >> >> the
> >> >> > > > >> >> >> equation,
> >> >> > > > >> >> >> but I don' t have any references right now over a dos
> >> >> > > > >> >> >> stack.
> >> >> > > > >> >> >>
> >> >> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98
> >> >> > > > >> >> >> would be
> >> >> > > > >> >> >> better,
> >> >> > > > >> >> >> but I don't know if the hardware here would be up to
> >> >> > > > >> >> >> those
> >> >> > > > >> >> >> os's.
> >> >> > > > >> >> >>
> >> >> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be
> >> >> > > > >> >> >> nice too.
> >> >> > > > >> >> >> I'm
> >> >> > > > >> >> >> asking for everything here. Objective is to have
> >> >> > > > >> >> >> something that
> >> >> > > > >> >> >> could
> >> >> > > > >> >> >> suck off or load a disk image with a floppy boot. I
> >> >> > > > >> >> >> suspect it was
> >> >> > > > >> >> >> a
> >> >> > > > >> >> >> difficult thing to get going in the day, though, and
> >> >> > > > >> >> >> even
> >> >> > > > >> >> >> wors now.
> >> >> > > > >> >> >>
> >> >> > > > >> >> >> jim
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >> > ,___
> >> >> > > > >> >> >> >
> >> >> > > > >> >> >>
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> > ------------------------------------
> >> >> > > > >> >> >
> >> >> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
> >> >> > > > >> >> > Groups
> >> >> > > > >> >> > Links
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >> >
> >> >> > > > >> >>
> >> >> > > > >> >
> >> >> > > > >> >
> >> >> > > > >> >
> >> >> > > > >> >
> >> >> > > > >> > ------------------------------------
> >> >> > > > >> >
> >> >> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> >> >> > Links
> >> >> > > > >> >
> >> >> > > > >> >
> >> >> > > > >> >
> >> >> > > > >>
> >> >> > > > >
> >> >> > > > >
> >> >> > > > >
> >> >> > > > >
> >> >> > > > > ------------------------------------
> >> >> > > > >
> >> >> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> >> >> > > > > Links
> >> >> > > > >
> >> >> > > > >
> >> >> > > > >
> >> >> > > >
> >> >> > >
> >> >> >
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> ------------------------------------
> >> >>
> >> >> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >>
> >> >
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
>
Date: Sun, 21 Oct 2012 18:40:56 -0000
From: "jeriddian"
Subject: Re: Best GRID 1530 Processor
I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> The original part was a 386DX-16. Got pics to prove it.
> Yes the 33Mhz part I put in is a DX and is working great.
>
> About the TI486DLC... a loose reading about the chip suggested to me
> it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> is bricked.
>
> I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
>
> On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> If that's so it chaps my butt...
> Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
>
> Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
>
> And how does a 16Mhz part cut it on a 25Mhz MB?
> Does the 16bit data bus, if that is what it is, decouple the
> DX's critical timing so that the lower rated parts work OK?
> Or dos the part also not actually get a 25Mhz clock?
>
> Inquiring minds want to know!
>
> I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> parts. Perhaps there are TI and IBM parts too. It gets confusing!
>
> If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
>
> From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> Q. Which one of the Cyrix Upgrade products do I use?
> A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
>
> On the other hand, what am I fighting for? Its still going to
> be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> try to max it out.
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > OK I'll talk to myself here...
> > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > Talk about early overclocking! GRiD cut corners?
> > > Glad this one didn't go on the space shuttle.
> > > So I put a 33Mhz part in.
> > > I got confused on drop in parts and tried the 486DLC I had around.
> > > no go of course, its "wasn't intended for drop in compatibility"
> > > so I've now read.
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > old parts. First I found a '387. Put it in, it works.
> > > > Then, almost forgetting the 486 history, I found
> > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > internals and a 1k cache. So that got me thinking, what would
> > > > be the best in class 386 replacement...
> > > > So far I get that the answer is a TI486SXL-50.
> > > >
> > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > Needs a dos sys file to enable the cache at boot.
> > > >
> > > > Concur?
> > > >
> > > > I don't suppose there is much hope in increasing the clocks
> > > > around the MB...
> > > >
> > > > Other optimizing ideas?
> > > >
> > >
> >
>
Date: Sun, 21 Oct 2012 19:12:27 -0000
From: "techtalklive@..."
Subject: Re: Typical 1500 series failure modes?
I would imagine the ISA is right there in the power supply/accessory
cavity on those connectors. Not sure I want to get into
trying to wire that.
The external bay configuration as you have with the 1535 would be
very practical!
Thanks. Just the same maybe I'll try to look up "Shawns" work.
Is it locatable here?
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Accessing the bus might not be that hard. Shawn was able to hook up a regular ISA cable that had both the Master and Slave connectors, which he was using to try and boot the computer from a flash drive and it could see the regular hard drive, I believe. So theoretically you could use the second connnector for that purpose, but then again hooking up the AMI card is another matter. I do have a couple of 1535's which have the extended bus connector going through the bottom of the computer and hook up to an axternal bay compartment which fits under the bottom of the computer and can hook up two separate external cards like that. I've never messed with it though. They're also in storage right now, so I can't access them.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >
> > I wonder if it would be possible to rig up an 8-bit ISA slot somewhere
> > inside the 1530 so you could use one of those AMI cards. Finding one would
> > be tough, though.
> >
> > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > "She said it was either her or the ham radio. Over."
> >
> >
> > ----- Original Message -----
> > From: "techtalklive@" <doug@>
> > To: <RuGRiD-Laptop@yahoogroups.com>
> > Sent: Saturday, October 20, 2012 10:40 PM
> > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >
> >
> > > I'm going to take a shot at shoe-horning some low height 1MB SIMMs
> > > in their. Let ya'll know how it goes.
> > > That Megatrends card sounds familiar; I suspect I worried about
> > > drive support way back in the day. Actually drive support
> > > is also an issue with these 1530s.
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >>
> > >> Wow. And, I suppose if you could find SIPPs from, say, Crucial or
> > >> Corsair,
> > >> they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
> > >> printer I owned, and Crucial wanted about a buck and a half a meg. Yeah,
> > >> that Paradox adapter would be swell. That may have gone the way of the
> > >> $50
> > >> card that American Megatrends used to make that would plug into any ISA
> > >> slot
> > >> and patch the BIOS so that you could use any size hard drive by any
> > >> manufacturer. Lots of good ideas like that, but they just sort of faded
> > >> away.
> > >>
> > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> "She said it was either her or the ham radio. Over."
> > >>
> > >>
> > >> ----- Original Message -----
> > >> From: "jeriddian" <Jeriddian@>
> > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> Sent: Thursday, October 18, 2012 9:41 PM
> > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >>
> > >>
> > >> > There was a company that at one time made an adaptation for the GRiD's
> > >> > called paradox in which they made an adapter that fit into the pin
> > >> > slots
> > >> > (I think. I've never actually seen it, but this is what I heard) and
> > >> > into
> > >> > which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for
> > >> > this,
> > >> > but never found it. That would be cool to find and use.
> > >> >
> > >> > The problems with the memory adaptation is ther is very, very little
> > >> > room
> > >> > for the memory to fit. The MoBo was actually designed to fit the
> > >> > smallest
> > >> > RAM stick they made at the time. You have to use a low profile SIPP,
> > >> > one
> > >> > with no extra PC Board material off to the sides. You could try laying
> > >> > the
> > >> > wired SIMM's over, but I looked at trying to do that with high profile
> > >> > SIPP's and there really isn't any room to do that either. I think if
> > >> > someone coud come up with an adapter like the paradox I described that
> > >> > fit
> > >> > 2 4 MB sticks to run in the eight rows of holes, that would likely be
> > >> > the
> > >> > best answer.
> > >> >
> > >> > Phil
> > >> >
> > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >> >>
> > >> >> If you made the leads long enough to lay the SIMMs over on their side,
> > >> >> and insulated them so that they wouldn't short anything out, would you
> > >> >> have any lead dress problems, such as EMI/RFI, stray capacitance or
> > >> >> inductance, etc.? And, if so, wonder if installing ferrite beads on
> > >> >> the
> > >> >> leads would help.
> > >> >>
> > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> "She said it was either her or the ham radio. Over."
> > >> >>
> > >> >>
> > >> >> ----- Original Message -----
> > >> >> From: Shawnerz
> > >> >> To: rugrid-laptop@...m
> > >> >> Sent: Wednesday, October 17, 2012 12:52 PM
> > >> >> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM.
> > >> >> Once I soldered the pins on, the module height would not allow the
> > >> >> cover
> > >> >> to go on.
> > >> >> Your results may vary,
> > >> >> -Shawn
> > >> >>
> > >> >>
> > >> >>
> > >> >> -------- Original message --------
> > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >> From: "techtalklive@" <doug@>
> > >> >> To: RuGRiD-Laptop@yahoogroups.com
> > >> >> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> Well that sounds promising. The only thing that would
> > >> >> top that would be a native SCSI attached to the bus connectors
> > >> >> in the accessory port. A ParPort one would do in the meantime.
> > >> >> Thanks!
> > >> >>
> > >> >> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> > >> >> Anyone know the mem speed? Hate to take the thing apart right
> > >> >> now to find out.
> > >> >> Thanks!
> > >> >>
> > >> >> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >> >> >
> > >> >> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked
> > >> >> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the
> > >> >> > mobo
> > >> >> > clocked down to 12.5 MHz.
> > >> >> >
> > >> >> > The problem with trying to access a higher capacity drive from the
> > >> >> > parallel port is that DOS is not capable of handling a large number
> > >> >> > of
> > >> >> > addresses. Of course, SCSI then is an option in doing that. I have a
> > >> >> > portable SCSI device which hooks into the parallel port made by
> > >> >> > Adaptec, called the Mini-SCSI which will allow the computer to
> > >> >> > connect
> > >> >> > to a larger drive such as a CDROM, large HDD, ZIP drive, or similar
> > >> >> > device by a SCSI-II connection. The SCSI connector has a parallel
> > >> >> > port
> > >> >> > on it that allows you to throughput a connection to your printer. I
> > >> >> > think that the maximum HDD capacity I can use with this thing is 2T.
> > >> >> >
> > >> >> > Phil
> > >> >> >
> > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >> >> > >
> > >> >> > > I used to have all that stuff. Today I think I can run a dos
> > >> >> > > program
> > >> >> > > on the GRiD that talks to my trusty TotalCommander on another PC.
> > >> >> > > As I might have mentioned in another post, if I could get
> > >> >> > > another PC to appear as a mounted drive to the GRiD I'd be in
> > >> >> > > real fat city. Then I'd have the machine wide open to the rest of
> > >> >> > > the world.
> > >> >> > > Any ideas there?
> > >> >> > >
> > >> >> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
> > >> >> > > wrote:
> > >> >> > > >
> > >> >> > > > Good luck with the Backpack stuff.
> > >> >> > > >
> > >> >> > > > There's a book called "Hot Links", which was produced by the
> > >> >> > > > same
> > >> >> > > > people
> > >> >> > > > that produced LapLink. In the back of the book is a disk with
> > >> >> > > > programs that
> > >> >> > > > will let you transfer files, either via null modem cable or
> > >> >> > > > LapLink
> > >> >> > > > cable.
> > >> >> > > > I doubt that the book is still in print, but it might be
> > >> >> > > > something
> > >> >> > > > to look
> > >> >> > > > for. If you get the book without the disk, let me know, and
> > >> >> > > > I'll
> > >> >> > > > get you
> > >> >> > > > the software. I can't remember if it lets you map the host
> > >> >> > > > drive
> > >> >> > > > to the
> > >> >> > > > client machine, but that would be cool, if it does that.
> > >> >> > > >
> > >> >> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> > > > "She said it was either her or the ham radio. Over."
> > >> >> > > >
> > >> >> > > >
> > >> >> > > > ----- Original Message -----
> > >> >> > > > From: "techtalklive@" <doug@>
> > >> >> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> > > > Sent: Monday, October 15, 2012 10:47 PM
> > >> >> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >> > > >
> > >> >> > > >
> > >> >> > > > > Its a 1530... clock is... I dont know 20Mhz?
> > >> >> > > > > Yes checking out Backpacks now. Just collected drivers from
> > >> >> > > > > around the web for them and am checking on ebay for
> > >> >> > > > > equipment. I suspect they will work.
> > >> >> > > > >
> > >> >> > > > > I thought I might take a look to see if there was parallel
> > >> >> > > > > port
> > >> >> > > > > software that would work like "laplink" to tether to another
> > >> >> > > > > PC
> > >> >> > > > > but would make a directory/drive on the the host PC appear as
> > >> >> > > > > a
> > >> >> > > > > drive to
> > >> >> > > > > the 1530.
> > >> >> > > > >
> > >> >> > > > > That would be cool... and avoid purchasing old hardware.
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> > >> >> > > > > <n8euj@>
> > >> >> > > > > wrote:
> > >> >> > > > >>
> > >> >> > > > >> What's the bus clock of the 1520, for example? If it's
> > >> >> > > > >> 10MHz,
> > >> >> > > > >> it *might*
> > >> >> > > > >> make it, but it would be breathing hard. As for parallel
> > >> >> > > > >> drives, see if
> > >> >> > > > >> you
> > >> >> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive
> > >> >> > > > >> that
> > >> >> > > > >> works off
> > >> >> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > >> >> > > > >>
> > >> >> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> > > > >> "She said it was either her or the ham radio. Over."
> > >> >> > > > >>
> > >> >> > > > >>
> > >> >> > > > >> ----- Original Message -----
> > >> >> > > > >> From: "techtalklive@" <doug@>
> > >> >> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > >> >> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> > >> >> > > > >> modes?
> > >> >> > > > >>
> > >> >> > > > >>
> > >> >> > > > >> >
> > >> >> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has
> > >> >> > > > >> > limited
> > >> >> > > > >> > driver
> > >> >> > > > >> > support.
> > >> >> > > > >> > Other similar devices don't seem to be on the used market
> > >> >> > > > >> > right not.
> > >> >> > > > >> > I'm also considering a parallel based disk drive at this
> > >> >> > > > >> > point.
> > >> >> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
> > >> >> > > > >> > think... I
> > >> >> > > > >> > didn't
> > >> >> > > > >> > actually run the numbers.
> > >> >> > > > >> > DC
> > >> >> > > > >> >
> > >> >> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> > >> >> > > > >> > <n8euj@> wrote:
> > >> >> > > > >> >>
> > >> >> > > > >> >> I don't think I'd even bother with the serial port. You
> > >> >> > > > >> >> might get
> > >> >> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs,
> > >> >> > > > >> >> but
> > >> >> > > > >> >> even a
> > >> >> > > > >> >> 16550AFN
> > >> >> > > > >> >> will only give you 115,200bps. And, if it's an
> > >> >> > > > >> >> 8250A/16450
> > >> >> > > > >> >> UART, you
> > >> >> > > > >> >> have
> > >> >> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
> > >> >> > > > >> >> standard
> > >> >> > > > >> >> parallel
> > >> >> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
> > >> >> > > > >> >> faster with
> > >> >> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of
> > >> >> > > > >> >> a
> > >> >> > > > >> >> GRiD, but
> > >> >> > > > >> >> even
> > >> >> > > > >> >> if you could directly tie in to the ISA bus, it would be
> > >> >> > > > >> >> tough.
> > >> >> > > > >> >>
> > >> >> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> > > > >> >> "She said it was either her or the ham radio. Over."
> > >> >> > > > >> >>
> > >> >> > > > >> >>
> > >> >> > > > >> >> ----- Original Message -----
> > >> >> > > > >> >> From: "Androgenoide" <androgenoide@>
> > >> >> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > >> >> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> > >> >> > > > >> >> modes?
> > >> >> > > > >> >>
> > >> >> > > > >> >>
> > >> >> > > > >> >> > The only real obstacle to DOS networking with the Grid
> > >> >> > > > >> >> > is
> > >> >> > > > >> >> > finding an
> > >> >> > > > >> >> > Ethernet adapter that will work through either the
> > >> >> > > > >> >> > serial
> > >> >> > > > >> >> > or
> > >> >> > > > >> >> > parallel
> > >> >> > > > >> >> > ports. I used the Xircom on the parallel port because
> > >> >> > > > >> >> > I
> > >> >> > > > >> >> > had one at
> > >> >> > > > >> >> > the
> > >> >> > > > >> >> > time. I've got a serial device server now that would
> > >> >> > > > >> >> > probably work
> > >> >> > > > >> >> > too
> > >> >> > > > >> >> > but I've got too much going on at the moment to dig out
> > >> >> > > > >> >> > a
> > >> >> > > > >> >> > Grid just
> > >> >> > > > >> >> > to
> > >> >> > > > >> >> > see
> > >> >> > > > >> >> > what would be required. Either of those solutions
> > >> >> > > > >> >> > would
> > >> >> > > > >> >> > be limited
> > >> >> > > > >> >> > by
> > >> >> > > > >> >> > the speed of the ports(and the Grid itself), of course.
> > >> >> > > > >> >> > Gigabit
> > >> >> > > > >> >> > speeds
> > >> >> > > > >> >> > are out of the question!
> > >> >> > > > >> >> > Another thought... The guy who put together the Techworm
> > >> >> > > > >> >> > boot disk
> > >> >> > > > >> >> > also
> > >> >> > > > >> >> > had one called Networm, a single floppy that could do a
> > >> >> > > > >> >> > dialup
> > >> >> > > > >> >> > internet
> > >> >> > > > >> >> > connection... (if you still have access to a dialup
> > >> >> > > > >> >> > service... if
> > >> >> > > > >> >> > not,
> > >> >> > > > >> >> > Budget Dial Up has a prepaid service that allows you to
> > >> >> > > > >> >> > buy
> > >> >> > > > >> >> > just a
> > >> >> > > > >> >> > few
> > >> >> > > > >> >> > hours at a time).
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > Generally speaking, if an old machine has either a
> > >> >> > > > >> >> > serial
> > >> >> > > > >> >> > or
> > >> >> > > > >> >> > parallel
> > >> >> > > > >> >> > port
> > >> >> > > > >> >> > and you can get it to boot into DOS, there is always a
> > >> >> > > > >> >> > way
> > >> >> > > > >> >> > to
> > >> >> > > > >> >> > transfer
> > >> >> > > > >> >> > files to another machine. Even if it has no floppy you
> > >> >> > > > >> >> > can use
> > >> >> > > > >> >> > another
> > >> >> > > > >> >> > DOS machine running Laplink. If it does have a floppy
> > >> >> > > > >> >> > there are a
> > >> >> > > > >> >> > lot
> > >> >> > > > >> >> > of
> > >> >> > > > >> >> > file transfer programs out there, from Kermit to the
> > >> >> > > > >> >> > original
> > >> >> > > > >> >> > version
> > >> >> > > > >> >> > of
> > >> >> > > > >> >> > Procomm that will fit on a single floppy.
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of
> > >> >> > > > >> >> > RAM... a
> > >> >> > > > >> >> > full
> > >> >> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95
> > >> >> > > > >> >> > would
> > >> >> > > > >> >> > be
> > >> >> > > > >> >> > tricky
> > >> >> > > > >> >> > and
> > >> >> > > > >> >> > would require some hardware tweaks even to make a slow
> > >> >> > > > >> >> > machine...
> > >> >> > > > >> >> > kind
> > >> >> > > > >> >> > of
> > >> >> > > > >> >> > an extreme project. I've heard of a Linux distro that
> > >> >> > > > >> >> > will fit on
> > >> >> > > > >> >> > a
> > >> >> > > > >> >> > single floppy and run on systems with limited resources
> > >> >> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but
> > >> >> > > > >> >> > even that
> > >> >> > > > >> >> > one
> > >> >> > > > >> >> > seems to want 4MB of RAM.
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > There are plenty of people on the web who have too much
> > >> >> > > > >> >> > time on
> > >> >> > > > >> >> > their
> > >> >> > > > >> >> > hands and are still playing with machines even older
> > >> >> > > > >> >> > than
> > >> >> > > > >> >> > the
> > >> >> > > > >> >> > Grid...
> > >> >> > > > >> >> > You
> > >> >> > > > >> >> > can still buy new after-market accessories for
> > >> >> > > > >> >> > Commodores,
> > >> >> > > > >> >> > for
> > >> >> > > > >> >> > example,
> > >> >> > > > >> >> > so
> > >> >> > > > >> >> > don't assume that there are no new solutions to old
> > >> >> > > > >> >> > problems.
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@>
> > >> >> > > > >> >> > wrote:
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the
> > >> >> > > > >> >> >> > parallel
> > >> >> > > > >> >> >> > port
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > a NIC... although I've been wondering lately if it
> > >> >> > > > >> >> >> > might
> > >> >> > > > >> >> >> > not have
> > >> >> > > > >> >> >> > made
> > >> >> > > > >> >> >> > equally good sense to use a device server on the
> > >> >> > > > >> >> >> > serial
> > >> >> > > > >> >> >> > port...?
> > >> >> > > > >> >> >> > And,
> > >> >> > > > >> >> >> > of course, the Arachne browser... not many choices
> > >> >> > > > >> >> >> > for a
> > >> >> > > > >> >> >> > DOS
> > >> >> > > > >> >> >> > browser
> > >> >> > > > >> >> >> > are there? I used it to check my Yahoo web mail and
> > >> >> > > > >> >> >> > I'll
> > >> >> > > > >> >> >> > have to
> > >> >> > > > >> >> >> > say
> > >> >> > > > >> >> >> > that it gave a whole new dimension of meaning to the
> > >> >> > > > >> >> >> > word "slow."
> > >> >> > > > >> >> >> > Go
> > >> >> > > > >> >> >> > ahead, make a pot of tea while it's loading that
> > >> >> > > > >> >> >> > page,
> > >> >> > > > >> >> >> > it will be
> > >> >> > > > >> >> >> > a
> > >> >> > > > >> >> >> > while.
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran
> > >> >> > > > >> >> >> > into a
> > >> >> > > > >> >> >> > web page
> > >> >> > > > >> >> >> > last
> > >> >> > > > >> >> >> > week of a guy who was competing with a friend to see
> > >> >> > > > >> >> >> > who
> > >> >> > > > >> >> >> > could
> > >> >> > > > >> >> >> > force
> > >> >> > > > >> >> >> > Windows XP to run with the least resources. It won't
> > >> >> > > > >> >> >> > install
> > >> >> > > > >> >> >> > unless
> > >> >> > > > >> >> >> > it
> > >> >> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor
> > >> >> > > > >> >> >> > but,
> > >> >> > > > >> >> >> > once
> > >> >> > > > >> >> >> > installed
> > >> >> > > > >> >> >> > you can remove RAM and underclock the machine... He
> > >> >> > > > >> >> >> > said
> > >> >> > > > >> >> >> > he got
> > >> >> > > > >> >> >> > one
> > >> >> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock
> > >> >> > > > >> >> >> > and
> > >> >> > > > >> >> >> > it took a
> > >> >> > > > >> >> >> > half
> > >> >> > > > >> >> >> > hour to boot.
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I
> > >> >> > > > >> >> >> > have nothing
> > >> >> > > > >> >> >> > else
> > >> >> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can
> > >> >> > > > >> >> >> > get
> > >> >> > > > >> >> >> > online
> > >> >> > > > >> >> >> > with
> > >> >> > > > >> >> >> > a
> > >> >> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that
> > >> >> > > > >> >> >> > Contiki
> > >> >> > > > >> >> >> > OS/browser
> > >> >> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@"
> > >> >> > > > >> >> >> > <doug@> wrote:
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > Like the hack job? :O
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone
> > >> >> > > > >> >> >> > > swapped
> > >> >> > > > >> >> >> > > screes?
> > >> >> > > > >> >> >> > > Should I take the kbd apart and clean it (will that
> > >> >> > > > >> >> >> > > likely
> > >> >> > > > >> >> >> > > fix it?) or look for a replacement?
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > So what can I do with this thing if I put more mem
> > >> >> > > > >> >> >> > > in
> > >> >> > > > >> >> >> > > it?
> > >> >> > > > >> >> >> > > Its all accessed funky through expaned mem methods,
> > >> >> > > > >> >> >> > > isn't it?
> > >> >> > > > >> >> >> > > I have a coprocessor I could put in this but not
> > >> >> > > > >> >> >> > > sure
> > >> >> > > > >> >> >> > > of
> > >> >> > > > >> >> >> > > the point there.
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > I think I might like to accomplish getting it on
> > >> >> > > > >> >> >> > > the
> > >> >> > > > >> >> >> > > web.
> > >> >> > > > >> >> >> > > I'd need the LAN hardware I guess.
> > >> >> > > > >> >> >> > > Any other ideas?
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
> > >> >> > > > >> >> >> > > contact on
> > >> >> > > > >> >> >> > > it that mate inside the cavity. But one of the two
> > >> >> > > > >> >> >> > > spring
> > >> >> > > > >> >> >> > > contacts
> > >> >> > > > >> >> >> > > inside is "rubberized", so only the one contact
> > >> >> > > > >> >> >> > > hits
> > >> >> > > > >> >> >> > > metal to
> > >> >> > > > >> >> >> > > metal.
> > >> >> > > > >> >> >> > > So the P.S. only works using the cord to go from
> > >> >> > > > >> >> >> > > the
> > >> >> > > > >> >> >> > > P.S. into
> > >> >> > > > >> >> >> > > the
> > >> >> > > > >> >> >> > > radial DC jack. Strange?
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > DC
> > >> >> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > >> >> > > > >> >> >> > <Jeriddian@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Great job, Doug!
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of
> > >> >> > > > >> >> >> > > > these
> > >> >> > > > >> >> >> > > > beautiful
> > >> >> > > > >> >> >> > machines? And yep, that's the way it works.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Once you restore battery power to the 1287A, the
> > >> >> > > > >> >> >> > > > CMOS
> > >> >> > > > >> >> >> > > > registers
> > >> >> > > > >> >> >> > are again active. It's just that they're filled with
> > >> >> > > > >> >> >> > nonsense, so
> > >> >> > > > >> >> >> > the
> > >> >> > > > >> >> >> > computer tells you the clock had stopped (which it
> > >> >> > > > >> >> >> > did),
> > >> >> > > > >> >> >> > and
> > >> >> > > > >> >> >> > simply
> > >> >> > > > >> >> >> > prompts you to reset the time. Once you do that and
> > >> >> > > > >> >> >> > reboot,
> > >> >> > > > >> >> >> > everything's hunky-dory.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > You can probably find some more 256K sticks
> > >> >> > > > >> >> >> > > > somewhere and
> > >> >> > > > >> >> >> > > > upgrade
> > >> >> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to
> > >> >> > > > >> >> >> > Ver.
> > >> >> > > > >> >> >> > 6.22.
> > >> >> > > > >> >> >> > Great
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > hear the HDD is good too.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on
> > >> >> > > > >> >> >> > > > sale on ebay
> > >> >> > > > >> >> >> > > > that
> > >> >> > > > >> >> >> > I looked at, however it was strange. It was
> > >> >> > > > >> >> >> > definitely
> > >> >> > > > >> >> >> > branded a
> > >> >> > > > >> >> >> > 1520,
> > >> >> > > > >> >> >> > and advertised that way, but the flip up screen said
> > >> >> > > > >> >> >> > it
> > >> >> > > > >> >> >> > was a 386
> > >> >> > > > >> >> >> > machine. I decided to get it, and it was only about
> > >> >> > > > >> >> >> > $90
> > >> >> > > > >> >> >> > with
> > >> >> > > > >> >> >> > shipping.
> > >> >> > > > >> >> >> > When I got the machine, I was very excited when it
> > >> >> > > > >> >> >> > began
> > >> >> > > > >> >> >> > to post,
> > >> >> > > > >> >> >> > because I got a full 8MB of RAM! It of course
> > >> >> > > > >> >> >> > displayed
> > >> >> > > > >> >> >> > the
> > >> >> > > > >> >> >> > configuration error 02 indicating the CMOS battery
> > >> >> > > > >> >> >> > was
> > >> >> > > > >> >> >> > dead. So I
> > >> >> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
> > >> >> > > > >> >> >> > model, but
> > >> >> > > > >> >> >> > that
> > >> >> > > > >> >> >> > was
> > >> >> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I
> > >> >> > > > >> >> >> > had a
> > >> >> > > > >> >> >> > spare.
> > >> >> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard
> > >> >> > > > >> >> >> > off
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > discover
> > >> >> > > > >> >> >> > that not only was this really a 386 machine (a 1530),
> > >> >> > > > >> >> >> > but it also
> > >> >> > > > >> >> >> > had
> > >> >> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced
> > >> >> > > > >> >> >> > the
> > >> >> > > > >> >> >> > 1287A and
> > >> >> > > > >> >> >> > this
> > >> >> > > > >> >> >> > solved the configuration error just fine. But alas, I
> > >> >> > > > >> >> >> > didn't get
> > >> >> > > > >> >> >> > a
> > >> >> > > > >> >> >> > triple crown winner here. The Conner drive was
> > >> >> > > > >> >> >> > definitely dead.
> > >> >> > > > >> >> >> > But
> > >> >> > > > >> >> >> > heck, getting another HDD is easy compared to the
> > >> >> > > > >> >> >> > other
> > >> >> > > > >> >> >> > benefits!
> > >> >> > > > >> >> >> > The
> > >> >> > > > >> >> >> > original owner of this machine definitely took care
> > >> >> > > > >> >> >> > of
> > >> >> > > > >> >> >> > it.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Phil
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > >> >> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and
> > >> >> > > > >> >> >> > > > > ran
> > >> >> > > > >> >> >> > > > > the wires
> > >> >> > > > >> >> >> > > > > to
> > >> >> > > > >> >> >> > > > > a
> > >> >> > > > >> >> >> > convenient place for the battery. Upon power up it
> > >> >> > > > >> >> >> > said
> > >> >> > > > >> >> >> > > > > that the RTC was stopped, and it needed
> > >> >> > > > >> >> >> > > > > setting.
> > >> >> > > > >> >> >> > > > > The "stopped" message threw me, I thought
> > >> >> > > > >> >> >> > > > > something was
> > >> >> > > > >> >> >> > > > > wrong
> > >> >> > > > >> >> >> > > > > with
> > >> >> > > > >> >> >> > > > > the chip. It took an F1 to continue and went
> > >> >> > > > >> >> >> > > > > right
> > >> >> > > > >> >> >> > > > > through
> > >> >> > > > >> >> >> > > > > POST
> > >> >> > > > >> >> >> > and Autoexec.
> > >> >> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory
> > >> >> > > > >> >> >> > > > > set
> > >> >> > > > >> >> >> > > > > the RTC.
> > >> >> > > > >> >> >> > > > > Now it boots cleanly.
> > >> >> > > > >> >> >> > > > > Has Lotus123 on the HD.
> > >> >> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"...
> > >> >> > > > >> >> >> > > > > page 2!
> > >> >> > > > >> >> >> > > > > The only remaining issue is that a few keys on
> > >> >> > > > >> >> >> > > > > the
> > >> >> > > > >> >> >> > > > > keyboard
> > >> >> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external
> > >> >> > > > >> >> >> > > > > kbd
> > >> >> > > > >> >> >> > > > > everything
> > >> >> > > > >> >> >> > > > > works.
> > >> >> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01
> > >> >> > > > >> >> >> > > > > 386
> > >> >> > > > >> >> >> > > > > with 1MB
> > >> >> > > > >> >> >> > > > > RAM,
> > >> >> > > > >> >> >> > > > > a
> > >> >> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some
> > >> >> > > > >> >> >> > smokin'
> > >> >> > > > >> >> >> > system!
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > >
> > >> >> > > > >> >> >> > > > > > Thanks so much that was great info. I had no
> > >> >> > > > >> >> >> > > > > > idea on the
> > >> >> > > > >> >> >> > > > > > X2
> > >> >> > > > >> >> >> > > > > > being a rating. May have to try it without
> > >> >> > > > >> >> >> > > > > > them
> > >> >> > > > >> >> >> > > > > > just to
> > >> >> > > > >> >> >> > > > > > make sure the rest of it is still good.
> > >> >> > > > >> >> >> > > > > >
> > >> >> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "fullsizewagon"
> > >> >> > > > >> >> >> > <andrebakken@> wrote:
> > >> >> > > > >> >> >> > > > > > >
> > >> >> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes
> > >> >> > > > >> >> >> > > > > > > a
> > >> >> > > > >> >> >> > > > > > > big
> > >> >> > > > >> >> >> > > > > > > difference.
> > >> >> > > > >> >> >> > The X2 also signifies they're an enhanced type meant
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > go
> > >> >> > > > >> >> >> > directly
> > >> >> > > > >> >> >> > across the mains. Be sure to get X2 rated
> > >> >> > > > >> >> >> > replacements.
> > >> >> > > > >> >> >> > > > > > > The PSU will work without those cap's in
> > >> >> > > > >> >> >> > > > > > > place, but
> > >> >> > > > >> >> >> > > > > > > will
> > >> >> > > > >> >> >> > radiate more interference/noise out onto the mains.
> > >> >> > > > >> >> >> > > > > > >
> > >> >> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > There are two in there that are the same.
> > >> >> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > >> >> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square
> > >> >> > > > >> >> >> > > > > > > > package.
> > >> >> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
> > >> >> > > > >> >> >> > > > > > > > radial shape.
> > >> >> > > > >> >> >> > > > > > > > I have them out already.
> > >> >> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > DC
> > >> >> > > > >> >> >> > > > > ; > >
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > >> >> > > > >> >> >> > <Jeriddian@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > Good Find, DC
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > I guess they got burnt to the point
> > >> >> > > > >> >> >> > > > > > > > > where
> > >> >> > > > >> >> >> > > > > > > > > you can't
> > >> >> > > > >> >> >> > identify the capcity amount. Could you give me the
> > >> >> > > > >> >> >> > output voltage
> > >> >> > > > >> >> >> > and
> > >> >> > > > >> >> >> > amperage? I'll look through my units and see if I can
> > >> >> > > > >> >> >> > identify
> > >> >> > > > >> >> >> > them
> > >> >> > > > >> >> >> > for you.
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > Phil
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like
> > >> >> > > > >> >> >> > > > > > > > > > a
> > >> >> > > > >> >> >> > > > > > > > > > failed cap
> > >> >> > > > >> >> >> > > > > > > > > > in
> > >> >> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > >> >> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > >> >> > > > >> >> >> > > > > > > > > > Any identification tips welcome,
> > >> >> > > > >> >> >> > > > > > > > > > thanks.
> > >> >> > > > >> >> >> > > > > > > > > > There appears to be two of the same
> > >> >> > > > >> >> >> > > > > > > > > > caps, would
> > >> >> > > > >> >> >> > replace both
> > >> >> > > > >> >> >> > > > > > > > > > of course.
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > DC
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > > I am considering tackling the
> > >> >> > > > >> >> >> > > > > > > > > > > repair
> > >> >> > > > >> >> >> > > > > > > > > > > of a 1530
> > >> >> > > > >> >> >> > > > > > > > > > > that
> > >> >> > > > >> >> >> > > > > > > > > > > does not respond to the power
> > >> >> > > > >> >> >> > > > > > > > > > > switch.
> > >> >> > > > >> >> >> > > > > > > > > > > The power
> > >> >> > > > >> >> >> > > > > > > > > > > supply
> > >> >> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think
> > >> >> > > > >> >> >> > > > > > > > > > > its
> > >> >> > > > >> >> >> > > > > > > > > > > fine
> > >> >> > > > >> >> >> > (unfortunately,
> > >> >> > > > >> >> >> > > > > > > > > > > that would have been an easy
> > >> >> > > > >> >> >> > > > > > > > > > > problem
> > >> >> > > > >> >> >> > > > > > > > > > > isolation!)
> > >> >> > > > >> >> >> > > > > > > > > > > So its something internal. I have
> > >> >> > > > >> >> >> > > > > > > > > > > the
> > >> >> > > > >> >> >> > > > > > > > > > > service
> > >> >> > > > >> >> >> > > > > > > > > > > manuals
> > >> >> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd
> > >> >> > > > >> >> >> > > > > > > > > > > get
> > >> >> > > > >> >> >> > > > > > > > > > > some
> > >> >> > > > >> >> >> > > > > > > > > > > pointers
> > >> >> > > > >> >> >> > form
> > >> >> > > > >> >> >> > > > > > > > > > > folks who have already performed
> > >> >> > > > >> >> >> > > > > > > > > > > cold
> > >> >> > > > >> >> >> > > > > > > > > > > stone
> > >> >> > > > >> >> >> > > > > > > > > > > dead
> > >> >> > > > >> >> >> > diagnosis.
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this
> > >> >> > > > >> >> >> > > > > > > > > > > very clean
> > >> >> > > > >> >> >> > > > > > > > > > > 1530
> > >> >> > > > >> >> >> > > > > > > > > > > will
> > >> >> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > >> >> > > > >> >> >> > > > > > > > > > > DC
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > >
> > >> >> > > > >> >> >> > > > > >
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> Since we are on the topic of TCP does anyone have a
> > >> >> > > > >> >> >> formula stashed
> > >> >> > > > >> >> >> that
> > >> >> > > > >> >> >> can be easily had to run say serial (probably ppp) from
> > >> >> > > > >> >> >> something
> > >> >> > > > >> >> >> like
> > >> >> > > > >> >> >> a
> > >> >> > > > >> >> >> small system like the raspberry pi serially to a system
> > >> >> > > > >> >> >> with dos
> > >> >> > > > >> >> >> and a
> > >> >> > > > >> >> >> stack? It's been so long since I messed with dos
> > >> >> > > > >> >> >> environment
> > >> >> > > > >> >> >> networking
> > >> >> > > > >> >> >> I forget.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> I think windows of some sort had trumpet to handle part
> > >> >> > > > >> >> >> of
> > >> >> > > > >> >> >> the
> > >> >> > > > >> >> >> equation,
> > >> >> > > > >> >> >> but I don' t have any references right now over a dos
> > >> >> > > > >> >> >> stack.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98
> > >> >> > > > >> >> >> would be
> > >> >> > > > >> >> >> better,
> > >> >> > > > >> >> >> but I don't know if the hardware here would be up to
> > >> >> > > > >> >> >> those
> > >> >> > > > >> >> >> os's.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be
> > >> >> > > > >> >> >> nice too.
> > >> >> > > > >> >> >> I'm
> > >> >> > > > >> >> >> asking for everything here. Objective is to have
> > >> >> > > > >> >> >> something that
> > >> >> > > > >> >> >> could
> > >> >> > > > >> >> >> suck off or load a disk image with a floppy boot. I
> > >> >> > > > >> >> >> suspect it was
> > >> >> > > > >> >> >> a
> > >> >> > > > >> >> >> difficult thing to get going in the day, though, and
> > >> >> > > > >> >> >> even
> > >> >> > > > >> >> >> wors now.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> jim
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > ,___
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > ------------------------------------
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
> > >> >> > > > >> >> > Groups
> > >> >> > > > >> >> > Links
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >>
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> > ------------------------------------
> > >> >> > > > >> >
> > >> >> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> > >> >> > Links
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >>
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > > ------------------------------------
> > >> >> > > > >
> > >> >> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> > >> >> > > > > Links
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > >
> > >> >> > >
> > >> >> >
> > >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> ------------------------------------
> > >> >>
> > >> >> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >> >>
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > ------------------------------------
> > >> >
> > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >> >
> > >> >
> > >> >
> > >>
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >
> > >
> > >
> >
>
Date: Sun, 21 Oct 2012 19:13:35 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
I suspect you are right. I hope you at least enjoyed my rant!
I'll probably try a Cyrix if I'm still at this when one comes by.
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > The original part was a 386DX-16. Got pics to prove it.
> > Yes the 33Mhz part I put in is a DX and is working great.
> >
> > About the TI486DLC... a loose reading about the chip suggested to me
> > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > is bricked.
> >
> > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> >
> > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > If that's so it chaps my butt...
> > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> >
> > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> >
> > And how does a 16Mhz part cut it on a 25Mhz MB?
> > Does the 16bit data bus, if that is what it is, decouple the
> > DX's critical timing so that the lower rated parts work OK?
> > Or dos the part also not actually get a 25Mhz clock?
> >
> > Inquiring minds want to know!
> >
> > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> >
> > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> >
> > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > Q. Which one of the Cyrix Upgrade products do I use?
> > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> >
> > On the other hand, what am I fighting for? Its still going to
> > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > try to max it out.
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > OK I'll talk to myself here...
> > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > Talk about early overclocking! GRiD cut corners?
> > > > Glad this one didn't go on the space shuttle.
> > > > So I put a 33Mhz part in.
> > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > so I've now read.
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > old parts. First I found a '387. Put it in, it works.
> > > > > Then, almost forgetting the 486 history, I found
> > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > be the best in class 386 replacement...
> > > > > So far I get that the answer is a TI486SXL-50.
> > > > >
> > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > Needs a dos sys file to enable the cache at boot.
> > > > >
> > > > > Concur?
> > > > >
> > > > > I don't suppose there is much hope in increasing the clocks
> > > > > around the MB...
> > > > >
> > > > > Other optimizing ideas?
> > > > >
> > > >
> > >
> >
>
Date: Sun, 21 Oct 2012 19:29:05 -0000
From: "techtalklive@..."
Subject: 1530 VGA blue LCD
I posted a careful photo of my screen in Doug's 1530 stuff.
The screen is painful to use and I've tried all the contrast controls
of CONFIG and DISPLAY.
Is this typical for such a display or is the LCD/Backlight going.
I remember these monochrome LCDs being A LOT prettier... but
perhaps its the VGA grey scaling that makes it all muddy.
Date: Sun, 21 Oct 2012 12:37:08 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
text/plain; charset=iso-8859-1
It might be. I can't remember if I took any pictures of it. There is a big "gotcha" when trying to connect to the IDE connector.
I'm doing this from memory, so I may not remember everything 100% correctly.
I used 40, long, DIP pins to turn the female connector to a male. Then I used a standard IDE cable to connect the drive to the IDE "card." The problem is the pins are are now "mirrored." Or, the top row is now the bottom row, and vice-versa.
What's bugging me is I can't remember how I fixed that. I think I might have used another 40 pins and another short IDE cable to get the pins in the correct position.
Like Phil said, my stuff is in storage too. :(
-Shawn
________________________________
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Sunday, October 21, 2012 3:12 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
I would imagine the ISA is right there in the power supply/accessory
cavity on those connectors. Not sure I want to get into
trying to wire that.
The external bay configuration as you have with the 1535 would be
very practical!
Thanks. Just the same maybe I'll try to look up "Shawns" work.
Is it locatable here?
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Accessing the bus might not be that hard. Shawn was able to hook up a regular ISA cable that had both the Master and Slave connectors, which he was using to try and boot the computer from a flash drive and it could see the regular hard drive, I believe. So theoretically you could use the second connnector for that purpose, but then again hooking up the AMI card is another matter. I do have a couple of 1535's which have the extended bus connector going through the bottom of the computer and hook up to an axternal bay compartment which fits under the bottom of the computer and can hook up two separate external cards like that. I've never messed with it though. They're also in storage right now, so I can't access them.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> >
> > I wonder if it would be possible to rig up an 8-bit ISA slot somewhere
> > inside the 1530 so you could use one of those AMI cards. Finding one would
> > be tough, though.
> >
> > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > "She said it was either her or the ham radio. Over."
> >
> >
> > ----- Original Message -----
> > From: "techtalklive@" <doug@>
> > To: <RuGRiD-Laptop@yahoogroups.com>
> > Sent: Saturday, October 20, 2012 10:40 PM
> > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> >
> >
> > > I'm going to take a shot at shoe-horning some low height 1MB SIMMs
> > > in their. Let ya'll know how it goes.
> > > That Megatrends card sounds familiar; I suspect I worried about
> > > drive support way back in the day. Actually drive support
> > > is also an issue with these 1530s.
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >>
> > >> Wow. And, I suppose if you could find SIPPs from, say, Crucial or
> > >> Corsair,
> > >> they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
> > >> printer I owned, and Crucial wanted about a buck and a half a meg. Yeah,
> > >> that Paradox adapter would be swell. That may have gone the way of the
> > >> $50
> > >> card that American Megatrends used to make that would plug into any ISA
> > >> slot
> > >> and patch the BIOS so that you could use any size hard drive by any
> > >> manufacturer. Lots of good ideas like that, but they just sort of faded
> > >> away.
> > >>
> > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> "She said it was either her or the ham radio. Over."
> > >>
> > >>
> > >> ----- Original Message -----
> > >> From: "jeriddian" <Jeriddian@>
> > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> Sent: Thursday, October 18, 2012 9:41 PM
> > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >>
> > >>
> > >> > There was a company that at one time made an adaptation for the GRiD's
> > >> > called paradox in which they made an adapter that fit into the pin
> > >> > slots
> > >> > (I think. I've never actually seen it, but this is what I heard) and
> > >> > into
> > >> > which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for
> > >> > this,
> > >> > but never found it. That would be cool to find and use.
> > >> >
> > >> > The problems with the memory adaptation is ther is very, very little
> > >> > room
> > >> > for the memory to fit. The MoBo was actually designed to fit the
> > >> > smallest
> > >> > RAM stick they made at the time. You have to use a low profile SIPP,
> > >> > one
> > >> > with no extra PC Board material off to the sides. You could try laying
> > >> > the
> > >> > wired SIMM's over, but I looked at trying to do that with high profile
> > >> > SIPP's and there really isn't any room to do that either. I think if
> > >> > someone coud come up with an adapter like the paradox I described that
> > >> > fit
> > >> > 2 4 MB sticks to run in the eight rows of holes, that would likely be
> > >> > the
> > >> > best answer.
> > >> >
> > >> > Phil
> > >> >
> > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
> > >> >>
> > >> >> If you made the leads long enough to lay the SIMMs over on their side,
> > >> >> and insulated them so that they wouldn't short anything out, would you
> > >> >> have any lead dress problems, such as EMI/RFI, stray capacitance or
> > >> >> inductance, etc.? And, if so, wonder if installing ferrite beads on
> > >> >> the
> > >> >> leads would help.
> > >> >>
> > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> "She said it was either her or the ham radio. Over."
> > >> >>
> > >> >>
> > >> >> ----- Original Message -----
> > >> >> From: Shawnerz
> > >> >> To: rugrid-laptop@yahoogroups.com
> > >> >> Sent: Wednesday, October 17, 2012 12:52 PM
> > >> >> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> IIRC, it's 70 mS. The problem I ran in to is the height of the SIMM.
> > >> >> Once I soldered the pins on, the module height would not allow the
> > >> >> cover
> > >> >> to go on.
> > >> >> Your results may vary,
> > >> >> -Shawn
> > >> >>
> > >> >>
> > >> >>
> > >> >> -------- Original message --------
> > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >> From: "techtalklive@" <doug@>
> > >> >> To: RuGRiD-Laptop@yahoogroups.com
> > >> >> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> Well that sounds promising. The only thing that would
> > >> >> top that would be a native SCSI attached to the bus connectors
> > >> >> in the accessory port. A ParPort one would do in the meantime.
> > >> >> Thanks!
> > >> >>
> > >> >> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
> > >> >> Anyone know the mem speed? Hate to take the thing apart right
> > >> >> now to find out.
> > >> >> Thanks!
> > >> >>
> > >> >> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >> >> >
> > >> >> > The clock frequency of the 1520 CPU is 20 MHz, with the bus clocked
> > >> >> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz, the
> > >> >> > mobo
> > >> >> > clocked down to 12.5 MHz.
> > >> >> >
> > >> >> > The problem with trying to access a higher capacity drive from the
> > >> >> > parallel port is that DOS is not capable of handling a large number
> > >> >> > of
> > >> >> > addresses. Of course, SCSI then is an option in doing that. I have a
> > >> >> > portable SCSI device which hooks into the parallel port made by
> > >> >> > Adaptec, called the Mini-SCSI which will allow the computer to
> > >> >> > connect
> > >> >> > to a larger drive such as a CDROM, large HDD, ZIP drive, or similar
> > >> >> > device by a SCSI-II connection. The SCSI connector has a parallel
> > >> >> > port
> > >> >> > on it that allows you to throughput a connection to your printer. I
> > >> >> > think that the maximum HDD capacity I can use with this thing is 2T.
> > >> >> >
> > >> >> > Phil
> > >> >> >
> > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >> >> > >
> > >> >> > > I used to have all that stuff. Today I think I can run a dos
> > >> >> > > program
> > >> >> > > on the GRiD that talks to my trusty TotalCommander on another PC.
> > >> >> > > As I might have mentioned in another post, if I could get
> > >> >> > > another PC to appear as a mounted drive to the GRiD I'd be in
> > >> >> > > real fat city. Then I'd have the machine wide open to the rest of
> > >> >> > > the world.
> > >> >> > > Any ideas there?
> > >> >> > >
> > >> >> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
> > >> >> > > wrote:
> > >> >> > > >
> > >> >> > > > Good luck with the Backpack stuff.
> > >> >> > > >
> > >> >> > > > There's a book called "Hot Links", which was produced by the
> > >> >> > > > same
> > >> >> > > > people
> > >> >> > > > that produced LapLink. In the back of the book is a disk with
> > >> >> > > > programs that
> > >> >> > > > will let you transfer files, either via null modem cable or
> > >> >> > > > LapLink
> > >> >> > > > cable.
> > >> >> > > > I doubt that the book is still in print, but it might be
> > >> >> > > > something
> > >> >> > > > to look
> > >> >> > > > for. If you get the book without the disk, let me know, and
> > >> >> > > > I'll
> > >> >> > > > get you
> > >> >> > > > the software. I can't remember if it lets you map the host
> > >> >> > > > drive
> > >> >> > > > to the
> > >> >> > > > client machine, but that would be cool, if it does that.
> > >> >> > > >
> > >> >> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> > > > "She said it was either her or the ham radio. Over."
> > >> >> > > >
> > >> >> > > >
> > >> >> > > > ----- Original Message -----
> > >> >> > > > From: "techtalklive@" <doug@>
> > >> >> > > > To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> > > > Sent: Monday, October 15, 2012 10:47 PM
> > >> >> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> > >> >> > > >
> > >> >> > > >
> > >> >> > > > > Its a 1530... clock is... I dont know 20Mhz?
> > >> >> > > > > Yes checking out Backpacks now. Just collected drivers from
> > >> >> > > > > around the web for them and am checking on ebay for
> > >> >> > > > > equipment. I suspect they will work.
> > >> >> > > > >
> > >> >> > > > > I thought I might take a look to see if there was parallel
> > >> >> > > > > port
> > >> >> > > > > software that would work like "laplink" to tether to another
> > >> >> > > > > PC
> > >> >> > > > > but would make a directory/drive on the the host PC appear as
> > >> >> > > > > a
> > >> >> > > > > drive to
> > >> >> > > > > the 1530.
> > >> >> > > > >
> > >> >> > > > > That would be cool... and avoid purchasing old hardware.
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> > >> >> > > > > <n8euj@>
> > >> >> > > > > wrote:
> > >> >> > > > >>
> > >> >> > > > >> What's the bus clock of the 1520, for example? If it's
> > >> >> > > > >> 10MHz,
> > >> >> > > > >> it *might*
> > >> >> > > > >> make it, but it would be breathing hard. As for parallel
> > >> >> > > > >> drives, see if
> > >> >> > > > >> you
> > >> >> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive
> > >> >> > > > >> that
> > >> >> > > > >> works off
> > >> >> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
> > >> >> > > > >>
> > >> >> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> > > > >> "She said it was either her or the ham radio. Over."
> > >> >> > > > >>
> > >> >> > > > >>
> > >> >> > > > >> ----- Original Message -----
> > >> >> > > > >> From: "techtalklive@" <doug@>
> > >> >> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
> > >> >> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> > >> >> > > > >> modes?
> > >> >> > > > >>
> > >> >> > > > >>
> > >> >> > > > >> >
> > >> >> > > > >> > Agreed! The Xircom Parallel port 10bT is available but has
> > >> >> > > > >> > limited
> > >> >> > > > >> > driver
> > >> >> > > > >> > support.
> > >> >> > > > >> > Other similar devices don't seem to be on the used market
> > >> >> > > > >> > right not.
> > >> >> > > > >> > I'm also considering a parallel based disk drive at this
> > >> >> > > > >> > point.
> > >> >> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
> > >> >> > > > >> > think... I
> > >> >> > > > >> > didn't
> > >> >> > > > >> > actually run the numbers.
> > >> >> > > > >> > DC
> > >> >> > > > >> >
> > >> >> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
> > >> >> > > > >> > <n8euj@> wrote:
> > >> >> > > > >> >>
> > >> >> > > > >> >> I don't think I'd even bother with the serial port. You
> > >> >> > > > >> >> might get
> > >> >> > > > >> >> 230,400bps out of it if it has one of the fancier UARTs,
> > >> >> > > > >> >> but
> > >> >> > > > >> >> even a
> > >> >> > > > >> >> 16550AFN
> > >> >> > > > >> >> will only give you 115,200bps. And, if it's an
> > >> >> > > > >> >> 8250A/16450
> > >> >> > > > >> >> UART, you
> > >> >> > > > >> >> have
> > >> >> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
> > >> >> > > > >> >> standard
> > >> >> > > > >> >> parallel
> > >> >> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
> > >> >> > > > >> >> faster with
> > >> >> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out of
> > >> >> > > > >> >> a
> > >> >> > > > >> >> GRiD, but
> > >> >> > > > >> >> even
> > >> >> > > > >> >> if you could directly tie in to the ISA bus, it would be
> > >> >> > > > >> >> tough.
> > >> >> > > > >> >>
> > >> >> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
> > >> >> > > > >> >> "She said it was either her or the ham radio. Over."
> > >> >> > > > >> >>
> > >> >> > > > >> >>
> > >> >> > > > >> >> ----- Original Message -----
> > >> >> > > > >> >> From: "Androgenoide" <androgenoide@>
> > >> >> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
> > >> >> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
> > >> >> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
> > >> >> > > > >> >> modes?
> > >> >> > > > >> >>
> > >> >> > > > >> >>
> > >> >> > > > >> >> > The only real obstacle to DOS networking with the Grid
> > >> >> > > > >> >> > is
> > >> >> > > > >> >> > finding an
> > >> >> > > > >> >> > Ethernet adapter that will work through either the
> > >> >> > > > >> >> > serial
> > >> >> > > > >> >> > or
> > >> >> > > > >> >> > parallel
> > >> >> > > > >> >> > ports. I used the Xircom on the parallel port because
> > >> >> > > > >> >> > I
> > >> >> > > > >> >> > had one at
> > >> >> > > > >> >> > the
> > >> >> > > > >> >> > time. I've got a serial device server now that would
> > >> >> > > > >> >> > probably work
> > >> >> > > > >> >> > too
> > >> >> > > > >> >> > but I've got too much going on at the moment to dig out
> > >> >> > > > >> >> > a
> > >> >> > > > >> >> > Grid just
> > >> >> > > > >> >> > to
> > >> >> > > > >> >> > see
> > >> >> > > > >> >> > what would be required. Either of those solutions
> > >> >> > > > >> >> > would
> > >> >> > > > >> >> > be limited
> > >> >> > > > >> >> > by
> > >> >> > > > >> >> > the speed of the ports(and the Grid itself), of course.
> > >> >> > > > >> >> > Gigabit
> > >> >> > > > >> >> > speeds
> > >> >> > > > >> >> > are out of the question!
> > >> >> > > > >> >> > Another thought... The guy who put together the Techworm
> > >> >> > > > >> >> > boot disk
> > >> >> > > > >> >> > also
> > >> >> > > > >> >> > had one called Networm, a single floppy that could do a
> > >> >> > > > >> >> > dialup
> > >> >> > > > >> >> > internet
> > >> >> > > > >> >> > connection... (if you still have access to a dialup
> > >> >> > > > >> >> > service... if
> > >> >> > > > >> >> > not,
> > >> >> > > > >> >> > Budget Dial Up has a prepaid service that allows you to
> > >> >> > > > >> >> > buy
> > >> >> > > > >> >> > just a
> > >> >> > > > >> >> > few
> > >> >> > > > >> >> > hours at a time).
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > Generally speaking, if an old machine has either a
> > >> >> > > > >> >> > serial
> > >> >> > > > >> >> > or
> > >> >> > > > >> >> > parallel
> > >> >> > > > >> >> > port
> > >> >> > > > >> >> > and you can get it to boot into DOS, there is always a
> > >> >> > > > >> >> > way
> > >> >> > > > >> >> > to
> > >> >> > > > >> >> > transfer
> > >> >> > > > >> >> > files to another machine. Even if it has no floppy you
> > >> >> > > > >> >> > can use
> > >> >> > > > >> >> > another
> > >> >> > > > >> >> > DOS machine running Laplink. If it does have a floppy
> > >> >> > > > >> >> > there are a
> > >> >> > > > >> >> > lot
> > >> >> > > > >> >> > of
> > >> >> > > > >> >> > file transfer programs out there, from Kermit to the
> > >> >> > > > >> >> > original
> > >> >> > > > >> >> > version
> > >> >> > > > >> >> > of
> > >> >> > > > >> >> > Procomm that will fit on a single floppy.
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB of
> > >> >> > > > >> >> > RAM... a
> > >> >> > > > >> >> > full
> > >> >> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95
> > >> >> > > > >> >> > would
> > >> >> > > > >> >> > be
> > >> >> > > > >> >> > tricky
> > >> >> > > > >> >> > and
> > >> >> > > > >> >> > would require some hardware tweaks even to make a slow
> > >> >> > > > >> >> > machine...
> > >> >> > > > >> >> > kind
> > >> >> > > > >> >> > of
> > >> >> > > > >> >> > an extreme project. I've heard of a Linux distro that
> > >> >> > > > >> >> > will fit on
> > >> >> > > > >> >> > a
> > >> >> > > > >> >> > single floppy and run on systems with limited resources
> > >> >> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html) but
> > >> >> > > > >> >> > even that
> > >> >> > > > >> >> > one
> > >> >> > > > >> >> > seems to want 4MB of RAM.
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > There are plenty of people on the web who have too much
> > >> >> > > > >> >> > time on
> > >> >> > > > >> >> > their
> > >> >> > > > >> >> > hands and are still playing with machines even older
> > >> >> > > > >> >> > than
> > >> >> > > > >> >> > the
> > >> >> > > > >> >> > Grid...
> > >> >> > > > >> >> > You
> > >> >> > > > >> >> > can still buy new after-market accessories for
> > >> >> > > > >> >> > Commodores,
> > >> >> > > > >> >> > for
> > >> >> > > > >> >> > example,
> > >> >> > > > >> >> > so
> > >> >> > > > >> >> > don't assume that there are no new solutions to old
> > >> >> > > > >> >> > problems.
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@>
> > >> >> > > > >> >> > wrote:
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts the
> > >> >> > > > >> >> >> > parallel
> > >> >> > > > >> >> >> > port
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > a NIC... although I've been wondering lately if it
> > >> >> > > > >> >> >> > might
> > >> >> > > > >> >> >> > not have
> > >> >> > > > >> >> >> > made
> > >> >> > > > >> >> >> > equally good sense to use a device server on the
> > >> >> > > > >> >> >> > serial
> > >> >> > > > >> >> >> > port...?
> > >> >> > > > >> >> >> > And,
> > >> >> > > > >> >> >> > of course, the Arachne browser... not many choices
> > >> >> > > > >> >> >> > for a
> > >> >> > > > >> >> >> > DOS
> > >> >> > > > >> >> >> > browser
> > >> >> > > > >> >> >> > are there? I used it to check my Yahoo web mail and
> > >> >> > > > >> >> >> > I'll
> > >> >> > > > >> >> >> > have to
> > >> >> > > > >> >> >> > say
> > >> >> > > > >> >> >> > that it gave a whole new dimension of meaning to the
> > >> >> > > > >> >> >> > word "slow."
> > >> >> > > > >> >> >> > Go
> > >> >> > > > >> >> >> > ahead, make a pot of tea while it's loading that
> > >> >> > > > >> >> >> > page,
> > >> >> > > > >> >> >> > it will be
> > >> >> > > > >> >> >> > a
> > >> >> > > > >> >> >> > while.
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran
> > >> >> > > > >> >> >> > into a
> > >> >> > > > >> >> >> > web page
> > >> >> > > > >> >> >> > last
> > >> >> > > > >> >> >> > week of a guy who was competing with a friend to see
> > >> >> > > > >> >> >> > who
> > >> >> > > > >> >> >> > could
> > >> >> > > > >> >> >> > force
> > >> >> > > > >> >> >> > Windows XP to run with the least resources. It won't
> > >> >> > > > >> >> >> > install
> > >> >> > > > >> >> >> > unless
> > >> >> > > > >> >> >> > it
> > >> >> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor
> > >> >> > > > >> >> >> > but,
> > >> >> > > > >> >> >> > once
> > >> >> > > > >> >> >> > installed
> > >> >> > > > >> >> >> > you can remove RAM and underclock the machine... He
> > >> >> > > > >> >> >> > said
> > >> >> > > > >> >> >> > he got
> > >> >> > > > >> >> >> > one
> > >> >> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock
> > >> >> > > > >> >> >> > and
> > >> >> > > > >> >> >> > it took a
> > >> >> > > > >> >> >> > half
> > >> >> > > > >> >> >> > hour to boot.
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > I scored an HP 95LX a while back and someday, when I
> > >> >> > > > >> >> >> > have nothing
> > >> >> > > > >> >> >> > else
> > >> >> > > > >> >> >> > to do (Hah!) it might be interesting to see if I can
> > >> >> > > > >> >> >> > get
> > >> >> > > > >> >> >> > online
> > >> >> > > > >> >> >> > with
> > >> >> > > > >> >> >> > a
> > >> >> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe that
> > >> >> > > > >> >> >> > Contiki
> > >> >> > > > >> >> >> > OS/browser
> > >> >> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@"
> > >> >> > > > >> >> >> > <doug@> wrote:
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > Like the hack job? :O
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen... someone
> > >> >> > > > >> >> >> > > swapped
> > >> >> > > > >> >> >> > > screes?
> > >> >> > > > >> >> >> > > Should I take the kbd apart and clean it (will that
> > >> >> > > > >> >> >> > > likely
> > >> >> > > > >> >> >> > > fix it?) or look for a replacement?
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > So what can I do with this thing if I put more mem
> > >> >> > > > >> >> >> > > in
> > >> >> > > > >> >> >> > > it?
> > >> >> > > > >> >> >> > > Its all accessed funky through expaned mem methods,
> > >> >> > > > >> >> >> > > isn't it?
> > >> >> > > > >> >> >> > > I have a coprocessor I could put in this but not
> > >> >> > > > >> >> >> > > sure
> > >> >> > > > >> >> >> > > of
> > >> >> > > > >> >> >> > > the point there.
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > I think I might like to accomplish getting it on
> > >> >> > > > >> >> >> > > the
> > >> >> > > > >> >> >> > > web.
> > >> >> > > > >> >> >> > > I'd need the LAN hardware I guess.
> > >> >> > > > >> >> >> > > Any other ideas?
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
> > >> >> > > > >> >> >> > > contact on
> > >> >> > > > >> >> >> > > it that mate inside the cavity. But one of the two
> > >> >> > > > >> >> >> > > spring
> > >> >> > > > >> >> >> > > contacts
> > >> >> > > > >> >> >> > > inside is "rubberized", so only the one contact
> > >> >> > > > >> >> >> > > hits
> > >> >> > > > >> >> >> > > metal to
> > >> >> > > > >> >> >> > > metal.
> > >> >> > > > >> >> >> > > So the P.S. only works using the cord to go from
> > >> >> > > > >> >> >> > > the
> > >> >> > > > >> >> >> > > P.S. into
> > >> >> > > > >> >> >> > > the
> > >> >> > > > >> >> >> > > radial DC jack. Strange?
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> > > DC
> > >> >> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > >> >> > > > >> >> >> > <Jeriddian@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Great job, Doug!
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Isn't it nice when you manage to salvage one of
> > >> >> > > > >> >> >> > > > these
> > >> >> > > > >> >> >> > > > beautiful
> > >> >> > > > >> >> >> > machines? And yep, that's the way it works.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Once you restore battery power to the 1287A, the
> > >> >> > > > >> >> >> > > > CMOS
> > >> >> > > > >> >> >> > > > registers
> > >> >> > > > >> >> >> > are again active. It's just that they're filled with
> > >> >> > > > >> >> >> > nonsense, so
> > >> >> > > > >> >> >> > the
> > >> >> > > > >> >> >> > computer tells you the clock had stopped (which it
> > >> >> > > > >> >> >> > did),
> > >> >> > > > >> >> >> > and
> > >> >> > > > >> >> >> > simply
> > >> >> > > > >> >> >> > prompts you to reset the time. Once you do that and
> > >> >> > > > >> >> >> > reboot,
> > >> >> > > > >> >> >> > everything's hunky-dory.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > You can probably find some more 256K sticks
> > >> >> > > > >> >> >> > > > somewhere and
> > >> >> > > > >> >> >> > > > upgrade
> > >> >> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to
> > >> >> > > > >> >> >> > Ver.
> > >> >> > > > >> >> >> > 6.22.
> > >> >> > > > >> >> >> > Great
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > hear the HDD is good too.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > I recently got a great deal. There was a 1520 on
> > >> >> > > > >> >> >> > > > sale on ebay
> > >> >> > > > >> >> >> > > > that
> > >> >> > > > >> >> >> > I looked at, however it was strange. It was
> > >> >> > > > >> >> >> > definitely
> > >> >> > > > >> >> >> > branded a
> > >> >> > > > >> >> >> > 1520,
> > >> >> > > > >> >> >> > and advertised that way, but the flip up screen said
> > >> >> > > > >> >> >> > it
> > >> >> > > > >> >> >> > was a 386
> > >> >> > > > >> >> >> > machine. I decided to get it, and it was only about
> > >> >> > > > >> >> >> > $90
> > >> >> > > > >> >> >> > with
> > >> >> > > > >> >> >> > shipping.
> > >> >> > > > >> >> >> > When I got the machine, I was very excited when it
> > >> >> > > > >> >> >> > began
> > >> >> > > > >> >> >> > to post,
> > >> >> > > > >> >> >> > because I got a full 8MB of RAM! It of course
> > >> >> > > > >> >> >> > displayed
> > >> >> > > > >> >> >> > the
> > >> >> > > > >> >> >> > configuration error 02 indicating the CMOS battery
> > >> >> > > > >> >> >> > was
> > >> >> > > > >> >> >> > dead. So I
> > >> >> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
> > >> >> > > > >> >> >> > model, but
> > >> >> > > > >> >> >> > that
> > >> >> > > > >> >> >> > was
> > >> >> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I
> > >> >> > > > >> >> >> > had a
> > >> >> > > > >> >> >> > spare.
> > >> >> > > > >> >> >> > Imagine my surprise and joy when I took the keyboard
> > >> >> > > > >> >> >> > off
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > discover
> > >> >> > > > >> >> >> > that not only was this really a 386 machine (a 1530),
> > >> >> > > > >> >> >> > but it also
> > >> >> > > > >> >> >> > had
> > >> >> > > > >> >> >> > the math coprocessor 30387 chip as well! I replaced
> > >> >> > > > >> >> >> > the
> > >> >> > > > >> >> >> > 1287A and
> > >> >> > > > >> >> >> > this
> > >> >> > > > >> >> >> > solved the configuration error just fine. But alas, I
> > >> >> > > > >> >> >> > didn't get
> > >> >> > > > >> >> >> > a
> > >> >> > > > >> >> >> > triple crown winner here. The Conner drive was
> > >> >> > > > >> >> >> > definitely dead.
> > >> >> > > > >> >> >> > But
> > >> >> > > > >> >> >> > heck, getting another HDD is easy compared to the
> > >> >> > > > >> >> >> > other
> > >> >> > > > >> >> >> > benefits!
> > >> >> > > > >> >> >> > The
> > >> >> > > > >> >> >> > original owner of this machine definitely took care
> > >> >> > > > >> >> >> > of
> > >> >> > > > >> >> >> > it.
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > Phil
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
> > >> >> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and
> > >> >> > > > >> >> >> > > > > ran
> > >> >> > > > >> >> >> > > > > the wires
> > >> >> > > > >> >> >> > > > > to
> > >> >> > > > >> >> >> > > > > a
> > >> >> > > > >> >> >> > convenient place for the battery. Upon power up it
> > >> >> > > > >> >> >> > said
> > >> >> > > > >> >> >> > > > > that the RTC was stopped, and it needed
> > >> >> > > > >> >> >> > > > > setting.
> > >> >> > > > >> >> >> > > > > The "stopped" message threw me, I thought
> > >> >> > > > >> >> >> > > > > something was
> > >> >> > > > >> >> >> > > > > wrong
> > >> >> > > > >> >> >> > > > > with
> > >> >> > > > >> >> >> > > > > the chip. It took an F1 to continue and went
> > >> >> > > > >> >> >> > > > > right
> > >> >> > > > >> >> >> > > > > through
> > >> >> > > > >> >> >> > > > > POST
> > >> >> > > > >> >> >> > and Autoexec.
> > >> >> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL directory
> > >> >> > > > >> >> >> > > > > set
> > >> >> > > > >> >> >> > > > > the RTC.
> > >> >> > > > >> >> >> > > > > Now it boots cleanly.
> > >> >> > > > >> >> >> > > > > Has Lotus123 on the HD.
> > >> >> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530 stuff"...
> > >> >> > > > >> >> >> > > > > page 2!
> > >> >> > > > >> >> >> > > > > The only remaining issue is that a few keys on
> > >> >> > > > >> >> >> > > > > the
> > >> >> > > > >> >> >> > > > > keyboard
> > >> >> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an external
> > >> >> > > > >> >> >> > > > > kbd
> > >> >> > > > >> >> >> > > > > everything
> > >> >> > > > >> >> >> > > > > works.
> > >> >> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01
> > >> >> > > > >> >> >> > > > > 386
> > >> >> > > > >> >> >> > > > > with 1MB
> > >> >> > > > >> >> >> > > > > RAM,
> > >> >> > > > >> >> >> > > > > a
> > >> >> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some
> > >> >> > > > >> >> >> > smokin'
> > >> >> > > > >> >> >> > system!
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > >
> > >> >> > > > >> >> >> > > > > > Thanks so much that was great info. I had no
> > >> >> > > > >> >> >> > > > > > idea on the
> > >> >> > > > >> >> >> > > > > > X2
> > >> >> > > > >> >> >> > > > > > being a rating. May have to try it without
> > >> >> > > > >> >> >> > > > > > them
> > >> >> > > > >> >> >> > > > > > just to
> > >> >> > > > >> >> >> > > > > > make sure the rest of it is still good.
> > >> >> > > > >> >> >> > > > > >
> > >> >> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "fullsizewagon"
> > >> >> > > > >> >> >> > <andrebakken@> wrote:
> > >> >> > > > >> >> >> > > > > > >
> > >> >> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which makes
> > >> >> > > > >> >> >> > > > > > > a
> > >> >> > > > >> >> >> > > > > > > big
> > >> >> > > > >> >> >> > > > > > > difference.
> > >> >> > > > >> >> >> > The X2 also signifies they're an enhanced type meant
> > >> >> > > > >> >> >> > to
> > >> >> > > > >> >> >> > go
> > >> >> > > > >> >> >> > directly
> > >> >> > > > >> >> >> > across the mains. Be sure to get X2 rated
> > >> >> > > > >> >> >> > replacements.
> > >> >> > > > >> >> >> > > > > > > The PSU will work without those cap's in
> > >> >> > > > >> >> >> > > > > > > place, but
> > >> >> > > > >> >> >> > > > > > > will
> > >> >> > > > >> >> >> > radiate more interference/noise out onto the mains.
> > >> >> > > > >> >> >> > > > > > >
> > >> >> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > There are two in there that are the same.
> > >> >> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
> > >> >> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a square
> > >> >> > > > >> >> >> > > > > > > > package.
> > >> >> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
> > >> >> > > > >> >> >> > > > > > > > radial shape.
> > >> >> > > > >> >> >> > > > > > > > I have them out already.
> > >> >> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > DC
> > >> >> > > > >> >> >> > > > > ; > >
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>, "jeriddian"
> > >> >> > > > >> >> >> > <Jeriddian@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > Good Find, DC
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > I guess they got burnt to the point
> > >> >> > > > >> >> >> > > > > > > > > where
> > >> >> > > > >> >> >> > > > > > > > > you can't
> > >> >> > > > >> >> >> > identify the capcity amount. Could you give me the
> > >> >> > > > >> >> >> > output voltage
> > >> >> > > > >> >> >> > and
> > >> >> > > > >> >> >> > amperage? I'll look through my units and see if I can
> > >> >> > > > >> >> >> > identify
> > >> >> > > > >> >> >> > them
> > >> >> > > > >> >> >> > for you.
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > Phil
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > I posted pictures of what looks like
> > >> >> > > > >> >> >> > > > > > > > > > a
> > >> >> > > > >> >> >> > > > > > > > > > failed cap
> > >> >> > > > >> >> >> > > > > > > > > > in
> > >> >> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
> > >> >> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
> > >> >> > > > >> >> >> > > > > > > > > > Any identification tips welcome,
> > >> >> > > > >> >> >> > > > > > > > > > thanks.
> > >> >> > > > >> >> >> > > > > > > > > > There appears to be two of the same
> > >> >> > > > >> >> >> > > > > > > > > > caps, would
> > >> >> > > > >> >> >> > replace both
> > >> >> > > > >> >> >> > > > > > > > > > of course.
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > DC
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
> > >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
> > >> >> > > > >> >> >> > "techtalklive@" <doug@>
> > >> >> > > > >> >> >> > wrote:
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > > I am considering tackling the
> > >> >> > > > >> >> >> > > > > > > > > > > repair
> > >> >> > > > >> >> >> > > > > > > > > > > of a 1530
> > >> >> > > > >> >> >> > > > > > > > > > > that
> > >> >> > > > >> >> >> > > > > > > > > > > does not respond to the power
> > >> >> > > > >> >> >> > > > > > > > > > > switch.
> > >> >> > > > >> >> >> > > > > > > > > > > The power
> > >> >> > > > >> >> >> > > > > > > > > > > supply
> > >> >> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I think
> > >> >> > > > >> >> >> > > > > > > > > > > its
> > >> >> > > > >> >> >> > > > > > > > > > > fine
> > >> >> > > > >> >> >> > (unfortunately,
> > >> >> > > > >> >> >> > > > > > > > > > > that would have been an easy
> > >> >> > > > >> >> >> > > > > > > > > > > problem
> > >> >> > > > >> >> >> > > > > > > > > > > isolation!)
> > >> >> > > > >> >> >> > > > > > > > > > > So its something internal. I have
> > >> >> > > > >> >> >> > > > > > > > > > > the
> > >> >> > > > >> >> >> > > > > > > > > > > service
> > >> >> > > > >> >> >> > > > > > > > > > > manuals
> > >> >> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe I'd
> > >> >> > > > >> >> >> > > > > > > > > > > get
> > >> >> > > > >> >> >> > > > > > > > > > > some
> > >> >> > > > >> >> >> > > > > > > > > > > pointers
> > >> >> > > > >> >> >> > form
> > >> >> > > > >> >> >> > > > > > > > > > > folks who have already performed
> > >> >> > > > >> >> >> > > > > > > > > > > cold
> > >> >> > > > >> >> >> > > > > > > > > > > stone
> > >> >> > > > >> >> >> > > > > > > > > > > dead
> > >> >> > > > >> >> >> > diagnosis.
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI this
> > >> >> > > > >> >> >> > > > > > > > > > > very clean
> > >> >> > > > >> >> >> > > > > > > > > > > 1530
> > >> >> > > > >> >> >> > > > > > > > > > > will
> > >> >> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > > > Thanks in advance,
> > >> >> > > > >> >> >> > > > > > > > > > > DC
> > >> >> > > > >> >> >> > > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > > >
> > >> >> > > > >> >> >> > > > > > > >
> > >> >> > > > >> >> >> > > > > > >
> > >> >> > > > >> >> >> > > > > >
> > >> >> > > > >> >> >> > > > >
> > >> >> > > > >> >> >> > > >
> > >> >> > > > >> >> >> > >
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> Since we are on the topic of TCP does anyone have a
> > >> >> > > > >> >> >> formula stashed
> > >> >> > > > >> >> >> that
> > >> >> > > > >> >> >> can be easily had to run say serial (probably ppp) from
> > >> >> > > > >> >> >> something
> > >> >> > > > >> >> >> like
> > >> >> > > > >> >> >> a
> > >> >> > > > >> >> >> small system like the raspberry pi serially to a system
> > >> >> > > > >> >> >> with dos
> > >> >> > > > >> >> >> and a
> > >> >> > > > >> >> >> stack? It's been so long since I messed with dos
> > >> >> > > > >> >> >> environment
> > >> >> > > > >> >> >> networking
> > >> >> > > > >> >> >> I forget.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> I think windows of some sort had trumpet to handle part
> > >> >> > > > >> >> >> of
> > >> >> > > > >> >> >> the
> > >> >> > > > >> >> >> equation,
> > >> >> > > > >> >> >> but I don' t have any references right now over a dos
> > >> >> > > > >> >> >> stack.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> Probably something to do windows 3.1 or win95 / win98
> > >> >> > > > >> >> >> would be
> > >> >> > > > >> >> >> better,
> > >> >> > > > >> >> >> but I don't know if the hardware here would be up to
> > >> >> > > > >> >> >> those
> > >> >> > > > >> >> >> os's.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would be
> > >> >> > > > >> >> >> nice too.
> > >> >> > > > >> >> >> I'm
> > >> >> > > > >> >> >> asking for everything here. Objective is to have
> > >> >> > > > >> >> >> something that
> > >> >> > > > >> >> >> could
> > >> >> > > > >> >> >> suck off or load a disk image with a floppy boot. I
> > >> >> > > > >> >> >> suspect it was
> > >> >> > > > >> >> >> a
> > >> >> > > > >> >> >> difficult thing to get going in the day, though, and
> > >> >> > > > >> >> >> even
> > >> >> > > > >> >> >> wors now.
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >> jim
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >> > ,___
> > >> >> > > > >> >> >> >
> > >> >> > > > >> >> >>
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > ------------------------------------
> > >> >> > > > >> >> >
> > >> >> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
> > >> >> > > > >> >> > Groups
> > >> >> > > > >> >> > Links
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >> >
> > >> >> > > > >> >>
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> > ------------------------------------
> > >> >> > > > >> >
> > >> >> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> > >> >> > Links
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >> >
> > >> >> > > > >>
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > > ------------------------------------
> > >> >> > > > >
> > >> >> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
> > >> >> > > > > Links
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > > >
> > >> >> > > >
> > >> >> > >
> > >> >> >
> > >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> ------------------------------------
> > >> >>
> > >> >> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >> >>
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > ------------------------------------
> > >> >
> > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >> >
> > >> >
> > >> >
> > >>
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> > >
> > >
> > >
> >
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
http://docs.yahoo.com/info/terms/
Date: Sun, 21 Oct 2012 19:42:30 -0000
From: "techtalklive@..."
Subject: Re: 1530 VGA blue LCD
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I posted a careful photo of my screen in Doug's 1530 stuff.
> The screen is painful to use and I've tried all the contrast controls
> of CONFIG and DISPLAY.
> Is this typical for such a display or is the LCD/Backlight going.
> I remember these monochrome LCDs being A LOT prettier... but
> perhaps its the VGA grey scaling that makes it all muddy.
>
Well the screen is actually a little bluer than the pic shows and
it looks better in the pic than to the eye... but
I remember those gleeming white on blue monochrome displays of
yesteryear that I wish this looked like.
Am I missing something?
Date: Sun, 21 Oct 2012 13:01:48 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Re: 1530 VGA blue LCD
text/plain; charset=iso-8859-1
No, I don't think so. The display looks good.
Maybe there is some fancy polarizor on your phone or camera that sharpened up the display. But from what I can tell, it looks great.
-Shawn
________________________________
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Sunday, October 21, 2012 3:42 PM
Subject: [RuGRiD-Laptop] Re: 1530 VGA blue LCD
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I posted a careful photo of my screen in Doug's 1530 stuff.
> The screen is painful to use and I've tried all the contrast controls
> of CONFIG and DISPLAY.
> Is this typical for such a display or is the LCD/Backlight going.
> I remember these monochrome LCDs being A LOT prettier... but
> perhaps its the VGA grey scaling that makes it all muddy.
>
Well the screen is actually a little bluer than the pic shows and
it looks better in the pic than to the eye... but
I remember those gleeming white on blue monochrome displays of
yesteryear that I wish this looked like.
Am I missing something?
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
http://docs.yahoo.com/info/terms/
Date: Sun, 21 Oct 2012 20:38:24 -0000
From: "Andrea"
Subject: Re: Best GRID 1530 Processor
hallo,
i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
Andrea
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I suspect you are right. I hope you at least enjoyed my rant!
> I'll probably try a Cyrix if I'm still at this when one comes by.
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > The original part was a 386DX-16. Got pics to prove it.
> > > Yes the 33Mhz part I put in is a DX and is working great.
> > >
> > > About the TI486DLC... a loose reading about the chip suggested to me
> > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > is bricked.
> > >
> > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > >
> > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > If that's so it chaps my butt...
> > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > >
> > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > >
> > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > Does the 16bit data bus, if that is what it is, decouple the
> > > DX's critical timing so that the lower rated parts work OK?
> > > Or dos the part also not actually get a 25Mhz clock?
> > >
> > > Inquiring minds want to know!
> > >
> > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > >
> > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > >
> > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > Q. Which one of the Cyrix Upgrade products do I use?
> > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > >
> > > On the other hand, what am I fighting for? Its still going to
> > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > try to max it out.
> > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > >
> > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > >
> > > > Phil
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > OK I'll talk to myself here...
> > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > Talk about early overclocking! GRiD cut corners?
> > > > > Glad this one didn't go on the space shuttle.
> > > > > So I put a 33Mhz part in.
> > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > so I've now read.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > Then, almost forgetting the 486 history, I found
> > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > be the best in class 386 replacement...
> > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > >
> > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > >
> > > > > > Concur?
> > > > > >
> > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > around the MB...
> > > > > >
> > > > > > Other optimizing ideas?
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Sun, 21 Oct 2012 20:46:11 -0000
From: "techtalklive@..."
Subject: Re: 1530 VGA blue LCD
By comparison, this 1520 is how I hoped it would look.
Just a totally different LCD I guess?
http://www.youtube.com/watch?v=UeN-kNO_8e0
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> No, I don't think so. The display looks good.
> Maybe there is some fancy polarizor on your phone or camera that sharpened up the display. But from what I can tell, it looks great.
> -Shawn
>
>
> ________________________________
> From: "techtalklive@..." <doug@...>
> To: RuGRiD-Laptop@yahoogroups.com
> Sent: Sunday, October 21, 2012 3:42 PM
> Subject: [RuGRiD-Laptop] Re: 1530 VGA blue LCD
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I posted a careful photo of my screen in Doug's 1530 stuff.
> > The screen is painful to use and I've tried all the contrast controls
> > of CONFIG and DISPLAY.
> > Is this typical for such a display or is the LCD/Backlight going.
> > I remember these monochrome LCDs being A LOT prettier... but
> > perhaps its the VGA grey scaling that makes it all muddy.
> >
>
> Well the screen is actually a little bluer than the pic shows and
> it looks better in the pic than to the eye... but
> I remember those gleeming white on blue monochrome displays of
> yesteryear that I wish this looked like.
>
> Am I missing something?
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
> http://docs.yahoo.com/info/terms/
>
Date: Sun, 21 Oct 2012 20:52:18 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
What the heck... my MB is completely different.
See the Doug's 1530 photos.
My CPU is along the front edge right next to the '87 socket.
Did you system have an SX in it to start with?
--- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@...> wrote:
>
> hallo,
> i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> Andrea
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I suspect you are right. I hope you at least enjoyed my rant!
> > I'll probably try a Cyrix if I'm still at this when one comes by.
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > The original part was a 386DX-16. Got pics to prove it.
> > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > >
> > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > is bricked.
> > > >
> > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > >
> > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > If that's so it chaps my butt...
> > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > >
> > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > >
> > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > DX's critical timing so that the lower rated parts work OK?
> > > > Or dos the part also not actually get a 25Mhz clock?
> > > >
> > > > Inquiring minds want to know!
> > > >
> > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > >
> > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > >
> > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > >
> > > > On the other hand, what am I fighting for? Its still going to
> > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > try to max it out.
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > >
> > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > >
> > > > > Phil
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > OK I'll talk to myself here...
> > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > Glad this one didn't go on the space shuttle.
> > > > > > So I put a 33Mhz part in.
> > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > so I've now read.
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > be the best in class 386 replacement...
> > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > >
> > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > >
> > > > > > > Concur?
> > > > > > >
> > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > around the MB...
> > > > > > >
> > > > > > > Other optimizing ideas?
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Sun, 21 Oct 2012 22:19:46 -0000
From: "Andrea"
Subject: Re: Best GRID 1530 Processor
No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
sorry for my italianenglish.
Andrea
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
>
> What the heck... my MB is completely different.
> See the Doug's 1530 photos.
> My CPU is along the front edge right next to the '87 socket.
> Did you system have an SX in it to start with?
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> >
> > hallo,
> > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > Andrea
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I suspect you are right. I hope you at least enjoyed my rant!
> > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > >
> > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > >
> > > > Phil
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > >
> > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > is bricked.
> > > > >
> > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > >
> > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > If that's so it chaps my butt...
> > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > >
> > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > >
> > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > >
> > > > > Inquiring minds want to know!
> > > > >
> > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > >
> > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > >
> > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > >
> > > > > On the other hand, what am I fighting for? Its still going to
> > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > try to max it out.
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > >
> > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > >
> > > > > > Phil
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > OK I'll talk to myself here...
> > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > So I put a 33Mhz part in.
> > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > so I've now read.
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > be the best in class 386 replacement...
> > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > >
> > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > >
> > > > > > > > Concur?
> > > > > > > >
> > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > around the MB...
> > > > > > > >
> > > > > > > > Other optimizing ideas?
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Sun, 21 Oct 2012 22:37:05 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
Any idea for why the MB is different in yours then?
Thanks for the link... don't think I can use that package
though. Adapter? Don't think there is verical room for an adapter.
--- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@...> wrote:
>
> No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> sorry for my italianenglish.
> Andrea
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> >
> > What the heck... my MB is completely different.
> > See the Doug's 1530 photos.
> > My CPU is along the front edge right next to the '87 socket.
> > Did you system have an SX in it to start with?
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > >
> > > hallo,
> > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > Andrea
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > >
> > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > >
> > > > > Phil
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > >
> > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > is bricked.
> > > > > >
> > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > >
> > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > If that's so it chaps my butt...
> > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > >
> > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > >
> > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > >
> > > > > > Inquiring minds want to know!
> > > > > >
> > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > >
> > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > >
> > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > >
> > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > try to max it out.
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > >
> > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > >
> > > > > > > Phil
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > OK I'll talk to myself here...
> > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > So I put a 33Mhz part in.
> > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > so I've now read.
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > >
> > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > >
> > > > > > > > > Concur?
> > > > > > > > >
> > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > around the MB...
> > > > > > > > >
> > > > > > > > > Other optimizing ideas?
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Sun, 21 Oct 2012 22:42:30 -0000
From: "Andrea"
Subject: Re: Best GRID 1530 Processor
i'm sorry
the ti486sxlc2 is for upgrade the 1550sx it comes in Plastic QFP-100pin, without the adapter you have to desolder the original one...
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Any idea for why the MB is different in yours then?
> Thanks for the link... don't think I can use that package
> though. Adapter? Don't think there is verical room for an adapter.
>
>
> --- In RuGRiD-Laptop@...m, "Andrea" <zentaro.cane@> wrote:
> >
> > No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> > sorry for my italianenglish.
> > Andrea
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > >
> > > What the heck... my MB is completely different.
> > > See the Doug's 1530 photos.
> > > My CPU is along the front edge right next to the '87 socket.
> > > Did you system have an SX in it to start with?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > >
> > > > hallo,
> > > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > > Andrea
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > >
> > > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > > >
> > > > > > Phil
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > > >
> > > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > > is bricked.
> > > > > > >
> > > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > > >
> > > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > > If that's so it chaps my butt...
> > > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > > >
> > > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > > >
> > > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > > >
> > > > > > > Inquiring minds want to know!
> > > > > > >
> > > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > > >
> > > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > > >
> > > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > > >
> > > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > > try to max it out.
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > >
> > > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > > >
> > > > > > > > Phil
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > OK I'll talk to myself here...
> > > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > > So I put a 33Mhz part in.
> > > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > > so I've now read.
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > > >
> > > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > > >
> > > > > > > > > > Concur?
> > > > > > > > > >
> > > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > > around the MB...
> > > > > > > > > >
> > > > > > > > > > Other optimizing ideas?
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 22 Oct 2012 00:34:40 -0000
From: "jeriddian"
Subject: Re: Best GRID 1530 Processor
I think you're right, tech.
There is no room under the keyboard for anything. That's also one fo teh reasons why the 1287A RTC chip has to be flush with the PC board if it is replaced. The bottom of the keyboard acftually makes contact with both of thse chips. Although they don't use any kind of thermal connector, I wonder if the keyboard helps disperse some of the heat from the CPU, even though it doesn't require a heat sink. I don't think that CPU ever did.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> Any idea for why the MB is different in yours then?
> Thanks for the link... don't think I can use that package
> though. Adapter? Don't think there is verical room for an adapter.
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> >
> > No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> > sorry for my italianenglish.
> > Andrea
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > >
> > > What the heck... my MB is completely different.
> > > See the Doug's 1530 photos.
> > > My CPU is along the front edge right next to the '87 socket.
> > > Did you system have an SX in it to start with?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > >
> > > > hallo,
> > > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > > Andrea
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > >
> > > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > > >
> > > > > > Phil
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > > >
> > > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > > is bricked.
> > > > > > >
> > > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > > >
> > > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > > If that's so it chaps my butt...
> > > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > > >
> > > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > > >
> > > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > > >
> > > > > > > Inquiring minds want to know!
> > > > > > >
> > > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > > >
> > > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > > >
> > > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > > >
> > > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > > try to max it out.
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > >
> > > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > > >
> > > > > > > > Phil
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > OK I'll talk to myself here...
> > > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > > So I put a 33Mhz part in.
> > > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > > so I've now read.
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > > >
> > > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > > >
> > > > > > > > > > Concur?
> > > > > > > > > >
> > > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > > around the MB...
> > > > > > > > > >
> > > > > > > > > > Other optimizing ideas?
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 22 Oct 2012 00:37:11 -0000
From: "jeriddian"
Subject: Re: Best GRID 1530 Processor
I guess I'm confused then. I never heard of any of the 1530's ever being full 32 bit machines. I didn't think that happened until the 1550's came out.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@...> wrote:
>
> No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> sorry for my italianenglish.
> Andrea
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> >
> > What the heck... my MB is completely different.
> > See the Doug's 1530 photos.
> > My CPU is along the front edge right next to the '87 socket.
> > Did you system have an SX in it to start with?
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > >
> > > hallo,
> > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > Andrea
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > >
> > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > >
> > > > > Phil
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > >
> > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > is bricked.
> > > > > >
> > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > >
> > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > If that's so it chaps my butt...
> > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > >
> > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > >
> > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > >
> > > > > > Inquiring minds want to know!
> > > > > >
> > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > >
> > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > >
> > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > >
> > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > try to max it out.
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > >
> > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > >
> > > > > > > Phil
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > OK I'll talk to myself here...
> > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > So I put a 33Mhz part in.
> > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > so I've now read.
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > >
> > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > >
> > > > > > > > > Concur?
> > > > > > > > >
> > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > around the MB...
> > > > > > > > >
> > > > > > > > > Other optimizing ideas?
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 22 Oct 2012 00:40:03 -0000
From: "jeriddian"
Subject: Re: 1530 VGA blue LCD
Some of the LCD displays did seem to be rather 'blah' and not have a lot of contrast to them. I don't know if age had something to do with it, or the brightness and contrast controls were just not that fine in their control. I have several of them. Nice video. Obviously, the CMOS battery needs replacing.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> By comparison, this 1520 is how I hoped it would look.
> Just a totally different LCD I guess?
> http://www.youtube.com/watch?v=UeN-kNO_8e0
>
> --- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@> wrote:
> >
> > No, I don't think so. The display looks good.
> > Maybe there is some fancy polarizor on your phone or camera that sharpened up the display. But from what I can tell, it looks great.
> > -Shawn
> >
> >
> > ________________________________
> > From: "techtalklive@" <doug@>
> > To: RuGRiD-Laptop@yahoogroups.com
> > Sent: Sunday, October 21, 2012 3:42 PM
> > Subject: [RuGRiD-Laptop] Re: 1530 VGA blue LCD
> >
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > I posted a careful photo of my screen in Doug's 1530 stuff.
> > > The screen is painful to use and I've tried all the contrast controls
> > > of CONFIG and DISPLAY.
> > > Is this typical for such a display or is the LCD/Backlight going.
> > > I remember these monochrome LCDs being A LOT prettier... but
> > > perhaps its the VGA grey scaling that makes it all muddy.
> > >
> >
> > Well the screen is actually a little bluer than the pic shows and
> > it looks better in the pic than to the eye... but
> > I remember those gleeming white on blue monochrome displays of
> > yesteryear that I wish this looked like.
> >
> > Am I missing something?
> >
> >
> >
> >
> > ------------------------------------
> >
> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
> >
> >
> >
> > http://docs.yahoo.com/info/terms/
> >
>
Date: Mon, 22 Oct 2012 00:41:44 -0000
From: "jeriddian"
Subject: Re: 1530 VGA blue LCD
Yeah, some of the LCD's are quite faded. I have a good number of them. MAybe they're too old, I think.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> I posted a careful photo of my screen in Doug's 1530 stuff.
> The screen is painful to use and I've tried all the contrast controls
> of CONFIG and DISPLAY.
> Is this typical for such a display or is the LCD/Backlight going.
> I remember these monochrome LCDs being A LOT prettier... but
> perhaps its the VGA grey scaling that makes it all muddy.
>
Date: Mon, 22 Oct 2012 00:47:46 -0000
From: "jeriddian"
Subject: Re: Best GRID 1530 Processor
The possible memory combinations are as follwos:
4 256 KB sticks for 1 MB RAM (slots 1,3,5,7)
8 256 KB sticks for 2 MB RAM
4 1MB sticks for 4 MB RAM (slots 1,3,5,7)
8 1 MB sticks for 8 MB RAM
Technically we were officially told the 1520 would not accept more than 4 MB RAM, however, there have been several poeple who have put 8MB in their 1520's and made it work. I have also seen different combinations when just four sticks are being used such as slots 1,2,5,6.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@...> wrote:
>
> i'm sorry
> the ti486sxlc2 is for upgrade the 1550sx it comes in Plastic QFP-100pin, without the adapter you have to desolder the original one...
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > Any idea for why the MB is different in yours then?
> > Thanks for the link... don't think I can use that package
> > though. Adapter? Don't think there is verical room for an adapter.
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > >
> > > No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> > > sorry for my italianenglish.
> > > Andrea
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > >
> > > > What the heck... my MB is completely different.
> > > > See the Doug's 1530 photos.
> > > > My CPU is along the front edge right next to the '87 socket.
> > > > Did you system have an SX in it to start with?
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > > >
> > > > > hallo,
> > > > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > > > Andrea
> > > > >
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > >
> > > > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > >
> > > > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > > > >
> > > > > > > Phil
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > >
> > > > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > > > >
> > > > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > > > is bricked.
> > > > > > > >
> > > > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > > > >
> > > > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > > > If that's so it chaps my butt...
> > > > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > > > >
> > > > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > > > >
> > > > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > > > >
> > > > > > > > Inquiring minds want to know!
> > > > > > > >
> > > > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > > > >
> > > > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > > > >
> > > > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > > > >
> > > > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > > > try to max it out.
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > > >
> > > > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > > > >
> > > > > > > > > Phil
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > OK I'll talk to myself here...
> > > > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > > > So I put a 33Mhz part in.
> > > > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > > > so I've now read.
> > > > > > > > > >
> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > > >
> > > > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > > > >
> > > > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > > > >
> > > > > > > > > > > Concur?
> > > > > > > > > > >
> > > > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > > > around the MB...
> > > > > > > > > > >
> > > > > > > > > > > Other optimizing ideas?
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 22 Oct 2012 03:27:24 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
Thanks so much!
I might guess their was drive/load issues with the 1520 for 8 SIPPs
at the time. So could be hit or miss depending on the memory parts.
Guessing again, SIPPS were gone by the time higher density memory
became available. I'm going to be using 3 chip SIMMs cause
the chips are turned on their side so the height is lower than
the old 9 chip parts. I'm going to wire in 4 SIMMs to test.
If it goes well I'll put 4 more in.
Then I can run something like muLinux.
I got lucky too, my model has 100MB drive.
*whew*
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> The possible memory combinations are as follwos:
>
> 4 256 KB sticks for 1 MB RAM (slots 1,3,5,7)
> 8 256 KB sticks for 2 MB RAM
> 4 1MB sticks for 4 MB RAM (slots 1,3,5,7)
> 8 1 MB sticks for 8 MB RAM
>
> Technically we were officially told the 1520 would not accept more than 4 MB RAM, however, there have been several poeple who have put 8MB in their 1520's and made it work. I have also seen different combinations when just four sticks are being used such as slots 1,2,5,6.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> >
> > i'm sorry
> > the ti486sxlc2 is for upgrade the 1550sx it comes in Plastic QFP-100pin, without the adapter you have to desolder the original one...
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > Any idea for why the MB is different in yours then?
> > > Thanks for the link... don't think I can use that package
> > > though. Adapter? Don't think there is verical room for an adapter.
> > >
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > >
> > > > No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> > > > sorry for my italianenglish.
> > > > Andrea
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@...m, "techtalklive@" <doug@> wrote:
> > > > >
> > > > >
> > > > > What the heck... my MB is completely different.
> > > > > See the Doug's 1530 photos.
> > > > > My CPU is along the front edge right next to the '87 socket.
> > > > > Did you system have an SX in it to start with?
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > > > >
> > > > > > hallo,
> > > > > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > > > > Andrea
> > > > > >
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > > > > >
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > >
> > > > > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > > > > >
> > > > > > > > Phil
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > > > > >
> > > > > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > > > > is bricked.
> > > > > > > > >
> > > > > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > > > > >
> > > > > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > > > > If that's so it chaps my butt...
> > > > > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > > > > >
> > > > > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > > > > >
> > > > > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > > > > >
> > > > > > > > > Inquiring minds want to know!
> > > > > > > > >
> > > > > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > > > > >
> > > > > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > > > > >
> > > > > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > > > > >
> > > > > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > > > > try to max it out.
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > > > >
> > > > > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > > > > >
> > > > > > > > > > Phil
> > > > > > > > > >
> > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > > >
> > > > > > > > > > > OK I'll talk to myself here...
> > > > > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > > > > So I put a 33Mhz part in.
> > > > > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > > > > so I've now read.
> > > > > > > > > > >
> > > > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > > > >
> > > > > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > > > > >
> > > > > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > > > > >
> > > > > > > > > > > > Concur?
> > > > > > > > > > > >
> > > > > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > > > > around the MB...
> > > > > > > > > > > >
> > > > > > > > > > > > Other optimizing ideas?
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 22 Oct 2012 03:28:38 -0000
From: "techtalklive@..."
Subject: Re: 1530 VGA blue LCD
Good to know you have seen the same thing... and its
not a VGA/greyscale vs Monochrome thing, right?
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Yeah, some of the LCD's are quite faded. I have a good number of them. MAybe they're too old, I think.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > I posted a careful photo of my screen in Doug's 1530 stuff.
> > The screen is painful to use and I've tried all the contrast controls
> > of CONFIG and DISPLAY.
> > Is this typical for such a display or is the LCD/Backlight going.
> > I remember these monochrome LCDs being A LOT prettier... but
> > perhaps its the VGA grey scaling that makes it all muddy.
> >
>
Date: Mon, 22 Oct 2012 03:39:43 -0000
From: "techtalklive@..."
Subject: Re: Best GRID 1530 Processor
Fascinating. So there could be different 1530 MB variants...
Any chance there is a cataloging of this somewhere?
Isn't it interesting how different Andrea's MB and my MB
are?
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> I guess I'm confused then. I never heard of any of the 1530's ever being full 32 bit machines. I didn't think that happened until the 1550's came out.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> >
> > No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> > sorry for my italianenglish.
> > Andrea
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > >
> > > What the heck... my MB is completely different.
> > > See the Doug's 1530 photos.
> > > My CPU is along the front edge right next to the '87 socket.
> > > Did you system have an SX in it to start with?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > >
> > > > hallo,
> > > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > > Andrea
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > >
> > > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > > >
> > > > > > Phil
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > > >
> > > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > > is bricked.
> > > > > > >
> > > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > > >
> > > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > > If that's so it chaps my butt...
> > > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > > >
> > > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > > >
> > > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > > >
> > > > > > > Inquiring minds want to know!
> > > > > > >
> > > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > > >
> > > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > > >
> > > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > > >
> > > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > > try to max it out.
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > >
> > > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > > >
> > > > > > > > Phil
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > OK I'll talk to myself here...
> > > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > > So I put a 33Mhz part in.
> > > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > > so I've now read.
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > > >
> > > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > > >
> > > > > > > > > > Concur?
> > > > > > > > > >
> > > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > > around the MB...
> > > > > > > > > >
> > > > > > > > > > Other optimizing ideas?
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Date: Mon, 22 Oct 2012 01:49:34 -0400
From: Shawnerz
Subject: RE: [RuGRiD-Laptop] Re: Best GRID 1530 Processor
text/plain; charset=utf-8
I don't know if it means anything, but Andrea sent me a copy of his 1520 BIOS. It was different than the other two BIOS versions I've seen in 1520's. It was unique. I remember wondering if it been hacked in from another vendor.
Looking at the file tonight, the copyright strings indicate its from Grid. But there are BIOS error messages in German and French. I have not seen that in other Grid BIOS files.
-Shawn
-------- Original message --------
Subject: [RuGRiD-Laptop] Re: Best GRID 1530 Processor
From: "techtalklive@ymail.com" <doug@crawfordltd.com>
To: RuGRiD-Laptop@yahoogroups.com
CC: [RuGRiD-Laptop] Re: Best GRID 1530 Processor
Fascinating. So there could be different 1530 MB variants...
Any chance there is a cataloging of this somewhere?
Isn't it interesting how different Andrea's MB and my MB
are?
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> I guess I'm confused then. I never heard of any of the 1530's ever being full 32 bit machines. I didn't think that happened until the 1550's came out.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> >
> > No, it's a full 32 bit computer, the original cpu was an intel386dx16, the Grid 1550sx have a 386sx cpu, possible upgrade: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180643654374
> > sorry for my italianenglish.
> > Andrea
> >
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > >
> > > What the heck... my MB is completely different.
> > > See the Doug's 1530 photos.
> > > My CPU is along the front edge right next to the '87 socket.
> > > Did you system have an SX in it to start with?
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "Andrea" <zentaro.cane@> wrote:
> > > >
> > > > hallo,
> > > > i've uploaded some photos about my GRiD 1530 running a 486 upgrade. Best is ti486sxl2 running at 60mhz with cache enabled (landmark software)
> > > > Andrea
> > > >
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > I suspect you are right. I hope you at least enjoyed my rant!
> > > > > I'll probably try a Cyrix if I'm still at this when one comes by.
> > > > >
> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > >
> > > > > > I do remember reading the specs on the 1530 machine to be as I said. I hope that you can still work with it. I do know the Cyrix 486 should be able to work. I think there have been others on the forum who have reported that, but it's been awhile.
> > > > > >
> > > > > > Phil
> > > > > >
> > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > >
> > > > > > > The original part was a 386DX-16. Got pics to prove it.
> > > > > > > Yes the 33Mhz part I put in is a DX and is working great.
> > > > > > >
> > > > > > > About the TI486DLC... a loose reading about the chip suggested to me
> > > > > > > it should drop in: Cyrix WIKI: "Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX"
> > > > > > > but I read other places that it wasn't DESIGNED to be a drop in for 386 upgrades and that they would not be reliable, compatibility would be a problem. It appears so in the GRiD 1530 case. Or my chip
> > > > > > > is bricked.
> > > > > > >
> > > > > > > I've not come across any info that 386DX chips work 16bit data width MBs... what you refer to as 16 bit mode. I see reference that
> > > > > > > the 386 starts in 16 bit mode then goes to 32 mode but I think that is referring to its software model.
> > > > > > >
> > > > > > > On the other hand, I have read that the 1530 requires pairs of 30 pin SIPPs, and that suggests a 16 bit wide memory interface. ARGH.
> > > > > > > If that's so it chaps my butt...
> > > > > > > Finding a DX in there got me all excited that the 1530 was really a 32 bit MB. I have a mind to pull a pair of the SIMMs and verify the board really requires quad SIPPs. Is it possible that there are 32bit version of the 1530?
> > > > > > >
> > > > > > > Which begs the question, assuming that a DX can go on a MB designed for SX, why put a 386DX in there in production anyway?
> > > > > > > Was the 16Mhz DX cheap and plentiful at the time? Did GRiD/Tandy get a great deal on them and threw them in in LEU of an SX?
> > > > > > >
> > > > > > > And how does a 16Mhz part cut it on a 25Mhz MB?
> > > > > > > Does the 16bit data bus, if that is what it is, decouple the
> > > > > > > DX's critical timing so that the lower rated parts work OK?
> > > > > > > Or dos the part also not actually get a 25Mhz clock?
> > > > > > >
> > > > > > > Inquiring minds want to know!
> > > > > > >
> > > > > > > I found references to 486 Cyrix parts that were DESIGNED as drop in replacements: the 5v clock doubled 486DRX2 and 486SRX2
> > > > > > > parts. Perhaps there are TI and IBM parts too. It gets confusing!
> > > > > > >
> > > > > > > If you are right about the board really being 16bit, that opens me up to looking for the SRX2 parts. I can be patient!
> > > > > > >
> > > > > > > From: http://datasheets.chipdb.org/Cyrix/New%20Folder/faq386up.htm
> > > > > > > Q. Which one of the Cyrix Upgrade products do I use?
> > > > > > > A. If you have a 386SX PC, use the CX-486SRX2-25/60. If you have a 386DX PC, use the CX-486DRX2.
> > > > > > >
> > > > > > > On the other hand, what am I fighting for? Its still going to
> > > > > > > be a slow 8MB 386/486 machine... I guess its just a fun challenge to
> > > > > > > try to max it out.
> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > > > > > >
> > > > > > > > The 1530 did use a full DX chip (32 bit), but the motherboard still ran in SX mode (16 bit), thus I believe that designation. So the 33 MHz chip was also a 386DX? And it didn't work? That would make sense to me, though. As to the 486 chips, I think the only ones that worked were the CYRIX 486 chips I heard about that were able to be fitted, and were the only ones that would work, but I'm not completely sure.
> > > > > > > >
> > > > > > > > Phil
> > > > > > > >
> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > >
> > > > > > > > > OK I'll talk to myself here...
> > > > > > > > > Interestingly my "25Mhz" 1530 had a 386DX16 in the socket.
> > > > > > > > > Talk about early overclocking! GRiD cut corners?
> > > > > > > > > Glad this one didn't go on the space shuttle.
> > > > > > > > > So I put a 33Mhz part in.
> > > > > > > > > I got confused on drop in parts and tried the 486DLC I had around.
> > > > > > > > > no go of course, its "wasn't intended for drop in compatibility"
> > > > > > > > > so I've now read.
> > > > > > > > >
> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > > > > > > >
> > > > > > > > > > Revitalizing the 1530 GRiD got me looking into my stash of
> > > > > > > > > > old parts. First I found a '387. Put it in, it works.
> > > > > > > > > > Then, almost forgetting the 486 history, I found
> > > > > > > > > > a TI486DLC. So that's a 486 in 386 pinout with improved
> > > > > > > > > > internals and a 1k cache. So that got me thinking, what would
> > > > > > > > > > be the best in class 386 replacement...
> > > > > > > > > > So far I get that the answer is a TI486SXL-50.
> > > > > > > > > >
> > > > > > > > > > 5V, 8K cache, x2 internal clock, built in 387 and of course 486 goodies.
> > > > > > > > > > Needs a dos sys file to enable the cache at boot.
> > > > > > > > > >
> > > > > > > > > > Concur?
> > > > > > > > > >
> > > > > > > > > > I don't suppose there is much hope in increasing the clocks
> > > > > > > > > > around the MB...
> > > > > > > > > >
> > > > > > > > > > Other optimizing ideas?
> > > > > > gt; > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
------------------------------------
http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
Date: Mon, 22 Oct 2012 11:51:47 -0400
From: "Tom Rutherford"
Subject: Re: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
Yeah, I'd heard about the external bay. Very interesting.
-- 73 DE Tom Rutherford, N8EUJ, Burton, MI
"She said it was either her or the ham radio. Over."
----- Original Message -----
From: "jeriddian" <Jeriddian@...>
To: <RuGRiD-Laptop@yahoogroups.com>
Sent: Sunday, October 21, 2012 2:34 PM
Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
> Accessing the bus might not be that hard. Shawn was able to hook up a
> regular ISA cable that had both the Master and Slave connectors, which he
> was using to try and boot the computer from a flash drive and it could see
> the regular hard drive, I believe. So theoretically you could use the
> second connnector for that purpose, but then again hooking up the AMI card
> is another matter. I do have a couple of 1535's which have the extended
> bus connector going through the bottom of the computer and hook up to an
> axternal bay compartment which fits under the bottom of the computer and
> can hook up two separate external cards like that. I've never messed with
> it though. They're also in storage right now, so I can't access them.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@...> wrote:
>>
>> I wonder if it would be possible to rig up an 8-bit ISA slot somewhere
>> inside the 1530 so you could use one of those AMI cards. Finding one
>> would
>> be tough, though.
>>
>> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> "She said it was either her or the ham radio. Over."
>>
>>
>> ----- Original Message -----
>> From: "techtalklive@..." <doug@...>
>> To: <RuGRiD-Laptop@yahoogroups.com>
>> Sent: Saturday, October 20, 2012 10:40 PM
>> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>>
>>
>> > I'm going to take a shot at shoe-horning some low height 1MB SIMMs
>> > in their. Let ya'll know how it goes.
>> > That Megatrends card sounds familiar; I suspect I worried about
>> > drive support way back in the day. Actually drive support
>> > is also an issue with these 1530s.
>> >
>> >
>> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@> wrote:
>> >>
>> >> Wow. And, I suppose if you could find SIPPs from, say, Crucial or
>> >> Corsair,
>> >> they'd charge you a mint. I bought a 32MB FP SIMM for the first laser
>> >> printer I owned, and Crucial wanted about a buck and a half a meg.
>> >> Yeah,
>> >> that Paradox adapter would be swell. That may have gone the way of
>> >> the
>> >> $50
>> >> card that American Megatrends used to make that would plug into any
>> >> ISA
>> >> slot
>> >> and patch the BIOS so that you could use any size hard drive by any
>> >> manufacturer. Lots of good ideas like that, but they just sort of
>> >> faded
>> >> away.
>> >>
>> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> "She said it was either her or the ham radio. Over."
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "jeriddian" <Jeriddian@>
>> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> Sent: Thursday, October 18, 2012 9:41 PM
>> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >>
>> >>
>> >> > There was a company that at one time made an adaptation for the
>> >> > GRiD's
>> >> > called paradox in which they made an adapter that fit into the pin
>> >> > slots
>> >> > (I think. I've never actually seen it, but this is what I heard) and
>> >> > into
>> >> > which you culd fit 2 4 MB SIMM's to give you 8 MB. I've looked for
>> >> > this,
>> >> > but never found it. That would be cool to find and use.
>> >> >
>> >> > The problems with the memory adaptation is ther is very, very little
>> >> > room
>> >> > for the memory to fit. The MoBo was actually designed to fit the
>> >> > smallest
>> >> > RAM stick they made at the time. You have to use a low profile SIPP,
>> >> > one
>> >> > with no extra PC Board material off to the sides. You could try
>> >> > laying
>> >> > the
>> >> > wired SIMM's over, but I looked at trying to do that with high
>> >> > profile
>> >> > SIPP's and there really isn't any room to do that either. I think if
>> >> > someone coud come up with an adapter like the paradox I described
>> >> > that
>> >> > fit
>> >> > 2 4 MB sticks to run in the eight rows of holes, that would likely
>> >> > be
>> >> > the
>> >> > best answer.
>> >> >
>> >> > Phil
>> >> >
>> >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> >> > wrote:
>> >> >>
>> >> >> If you made the leads long enough to lay the SIMMs over on their
>> >> >> side,
>> >> >> and insulated them so that they wouldn't short anything out, would
>> >> >> you
>> >> >> have any lead dress problems, such as EMI/RFI, stray capacitance or
>> >> >> inductance, etc.? And, if so, wonder if installing ferrite beads
>> >> >> on
>> >> >> the
>> >> >> leads would help.
>> >> >>
>> >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> >> "She said it was either her or the ham radio. Over."
>> >> >>
>> >> >>
>> >> >> ----- Original Message -----
>> >> >> From: Shawnerz
>> >> >> To: rugrid-laptop@yahoogroups.com
>> >> >> Sent: Wednesday, October 17, 2012 12:52 PM
>> >> >> Subject: RE: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> IIRC, it's 70 mS. The problem I ran in to is the height of the
>> >> >> SIMM.
>> >> >> Once I soldered the pins on, the module height would not allow the
>> >> >> cover
>> >> >> to go on.
>> >> >> Your results may vary,
>> >> >> -Shawn
>> >> >>
>> >> >>
>> >> >>
>> >> >> -------- Original message --------
>> >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> >> From: "techtalklive@" <doug@>
>> >> >> To: RuGRiD-Laptop@yahoogroups.com
>> >> >> CC: [RuGRiD-Laptop] Re: Typical 1500 series failure modes?
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> Well that sounds promising. The only thing that would
>> >> >> top that would be a native SCSI attached to the bus connectors
>> >> >> in the accessory port. A ParPort one would do in the meantime.
>> >> >> Thanks!
>> >> >>
>> >> >> I'm thinking of moding some SIMM chips to go in the SIPP sockets.
>> >> >> Anyone know the mem speed? Hate to take the thing apart right
>> >> >> now to find out.
>> >> >> Thanks!
>> >> >>
>> >> >> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@>
>> >> >> wrote:
>> >> >> >
>> >> >> > The clock frequency of the 1520 CPU is 20 MHz, with the bus
>> >> >> > clocked
>> >> >> > down to 10 MHz. The clock frequency of the 1530 CPU is 25 MHz,
>> >> >> > the
>> >> >> > mobo
>> >> >> > clocked down to 12.5 MHz.
>> >> >> >
>> >> >> > The problem with trying to access a higher capacity drive from
>> >> >> > the
>> >> >> > parallel port is that DOS is not capable of handling a large
>> >> >> > number
>> >> >> > of
>> >> >> > addresses. Of course, SCSI then is an option in doing that. I
>> >> >> > have a
>> >> >> > portable SCSI device which hooks into the parallel port made by
>> >> >> > Adaptec, called the Mini-SCSI which will allow the computer to
>> >> >> > connect
>> >> >> > to a larger drive such as a CDROM, large HDD, ZIP drive, or
>> >> >> > similar
>> >> >> > device by a SCSI-II connection. The SCSI connector has a parallel
>> >> >> > port
>> >> >> > on it that allows you to throughput a connection to your printer.
>> >> >> > I
>> >> >> > think that the maximum HDD capacity I can use with this thing is
>> >> >> > 2T.
>> >> >> >
>> >> >> > Phil
>> >> >> >
>> >> >> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@>
>> >> >> > wrote:
>> >> >> > >
>> >> >> > > I used to have all that stuff. Today I think I can run a dos
>> >> >> > > program
>> >> >> > > on the GRiD that talks to my trusty TotalCommander on another
>> >> >> > > PC.
>> >> >> > > As I might have mentioned in another post, if I could get
>> >> >> > > another PC to appear as a mounted drive to the GRiD I'd be in
>> >> >> > > real fat city. Then I'd have the machine wide open to the rest
>> >> >> > > of
>> >> >> > > the world.
>> >> >> > > Any ideas there?
>> >> >> > >
>> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford" <n8euj@>
>> >> >> > > wrote:
>> >> >> > > >
>> >> >> > > > Good luck with the Backpack stuff.
>> >> >> > > >
>> >> >> > > > There's a book called "Hot Links", which was produced by the
>> >> >> > > > same
>> >> >> > > > people
>> >> >> > > > that produced LapLink. In the back of the book is a disk
>> >> >> > > > with
>> >> >> > > > programs that
>> >> >> > > > will let you transfer files, either via null modem cable or
>> >> >> > > > LapLink
>> >> >> > > > cable.
>> >> >> > > > I doubt that the book is still in print, but it might be
>> >> >> > > > something
>> >> >> > > > to look
>> >> >> > > > for. If you get the book without the disk, let me know, and
>> >> >> > > > I'll
>> >> >> > > > get you
>> >> >> > > > the software. I can't remember if it lets you map the host
>> >> >> > > > drive
>> >> >> > > > to the
>> >> >> > > > client machine, but that would be cool, if it does that.
>> >> >> > > >
>> >> >> > > > -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> >> > > > "She said it was either her or the ham radio. Over."
>> >> >> > > >
>> >> >> > > >
>> >> >> > > > ----- Original Message -----
>> >> >> > > > From: "techtalklive@" <doug@>
>> >> >> > > > To: <RuGRiD-Laptop@yahoogroups.com>
>> >> >> > > > Sent: Monday, October 15, 2012 10:47 PM
>> >> >> > > > Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
>> >> >> > > > modes?
>> >> >> > > >
>> >> >> > > >
>> >> >> > > > > Its a 1530... clock is... I dont know 20Mhz?
>> >> >> > > > > Yes checking out Backpacks now. Just collected drivers from
>> >> >> > > > > around the web for them and am checking on ebay for
>> >> >> > > > > equipment. I suspect they will work.
>> >> >> > > > >
>> >> >> > > > > I thought I might take a look to see if there was parallel
>> >> >> > > > > port
>> >> >> > > > > software that would work like "laplink" to tether to
>> >> >> > > > > another
>> >> >> > > > > PC
>> >> >> > > > > but would make a directory/drive on the the host PC appear
>> >> >> > > > > as
>> >> >> > > > > a
>> >> >> > > > > drive to
>> >> >> > > > > the 1530.
>> >> >> > > > >
>> >> >> > > > > That would be cool... and avoid purchasing old hardware.
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
>> >> >> > > > > <n8euj@>
>> >> >> > > > > wrote:
>> >> >> > > > >>
>> >> >> > > > >> What's the bus clock of the 1520, for example? If it's
>> >> >> > > > >> 10MHz,
>> >> >> > > > >> it *might*
>> >> >> > > > >> make it, but it would be breathing hard. As for parallel
>> >> >> > > > >> drives, see if
>> >> >> > > > >> you
>> >> >> > > > >> can find any of the Backpack stuff. I have a CD-ROM drive
>> >> >> > > > >> that
>> >> >> > > > >> works off
>> >> >> > > > >> the parallel port, but I haven't tried it on the GRiD yet.
>> >> >> > > > >>
>> >> >> > > > >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> >> > > > >> "She said it was either her or the ham radio. Over."
>> >> >> > > > >>
>> >> >> > > > >>
>> >> >> > > > >> ----- Original Message -----
>> >> >> > > > >> From: "techtalklive@" <doug@>
>> >> >> > > > >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> >> > > > >> Sent: Sunday, October 14, 2012 7:48 PM
>> >> >> > > > >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series failure
>> >> >> > > > >> modes?
>> >> >> > > > >>
>> >> >> > > > >>
>> >> >> > > > >> >
>> >> >> > > > >> > Agreed! The Xircom Parallel port 10bT is available but
>> >> >> > > > >> > has
>> >> >> > > > >> > limited
>> >> >> > > > >> > driver
>> >> >> > > > >> > support.
>> >> >> > > > >> > Other similar devices don't seem to be on the used
>> >> >> > > > >> > market
>> >> >> > > > >> > right not.
>> >> >> > > > >> > I'm also considering a parallel based disk drive at this
>> >> >> > > > >> > point.
>> >> >> > > > >> > Yes, ISA itself would have a hard time saturating 10bT I
>> >> >> > > > >> > think... I
>> >> >> > > > >> > didn't
>> >> >> > > > >> > actually run the numbers.
>> >> >> > > > >> > DC
>> >> >> > > > >> >
>> >> >> > > > >> > --- In RuGRiD-Laptop@yahoogroups.com, "Tom Rutherford"
>> >> >> > > > >> > <n8euj@> wrote:
>> >> >> > > > >> >>
>> >> >> > > > >> >> I don't think I'd even bother with the serial port.
>> >> >> > > > >> >> You
>> >> >> > > > >> >> might get
>> >> >> > > > >> >> 230,400bps out of it if it has one of the fancier
>> >> >> > > > >> >> UARTs,
>> >> >> > > > >> >> but
>> >> >> > > > >> >> even a
>> >> >> > > > >> >> 16550AFN
>> >> >> > > > >> >> will only give you 115,200bps. And, if it's an
>> >> >> > > > >> >> 8250A/16450
>> >> >> > > > >> >> UART, you
>> >> >> > > > >> >> have
>> >> >> > > > >> >> to slow it down with CTS/RTS handshaking. I think the
>> >> >> > > > >> >> standard
>> >> >> > > > >> >> parallel
>> >> >> > > > >> >> port will give you around 5Mbps, won't it? Maybe a tad
>> >> >> > > > >> >> faster with
>> >> >> > > > >> >> IEEE-1284 or ECP+EPP. I'd love to get 10/100 rates out
>> >> >> > > > >> >> of
>> >> >> > > > >> >> a
>> >> >> > > > >> >> GRiD, but
>> >> >> > > > >> >> even
>> >> >> > > > >> >> if you could directly tie in to the ISA bus, it would
>> >> >> > > > >> >> be
>> >> >> > > > >> >> tough.
>> >> >> > > > >> >>
>> >> >> > > > >> >> -- 73 DE Tom Rutherford, N8EUJ, Burton, MI
>> >> >> > > > >> >> "She said it was either her or the ham radio. Over."
>> >> >> > > > >> >>
>> >> >> > > > >> >>
>> >> >> > > > >> >> ----- Original Message -----
>> >> >> > > > >> >> From: "Androgenoide" <androgenoide@>
>> >> >> > > > >> >> To: <RuGRiD-Laptop@yahoogroups.com>
>> >> >> > > > >> >> Sent: Friday, October 12, 2012 3:37 PM
>> >> >> > > > >> >> Subject: [RuGRiD-Laptop] Re: Typical 1500 series
>> >> >> > > > >> >> failure
>> >> >> > > > >> >> modes?
>> >> >> > > > >> >>
>> >> >> > > > >> >>
>> >> >> > > > >> >> > The only real obstacle to DOS networking with the
>> >> >> > > > >> >> > Grid
>> >> >> > > > >> >> > is
>> >> >> > > > >> >> > finding an
>> >> >> > > > >> >> > Ethernet adapter that will work through either the
>> >> >> > > > >> >> > serial
>> >> >> > > > >> >> > or
>> >> >> > > > >> >> > parallel
>> >> >> > > > >> >> > ports. I used the Xircom on the parallel port
>> >> >> > > > >> >> > because
>> >> >> > > > >> >> > I
>> >> >> > > > >> >> > had one at
>> >> >> > > > >> >> > the
>> >> >> > > > >> >> > time. I've got a serial device server now that
>> >> >> > > > >> >> > would
>> >> >> > > > >> >> > probably work
>> >> >> > > > >> >> > too
>> >> >> > > > >> >> > but I've got too much going on at the moment to dig
>> >> >> > > > >> >> > out
>> >> >> > > > >> >> > a
>> >> >> > > > >> >> > Grid just
>> >> >> > > > >> >> > to
>> >> >> > > > >> >> > see
>> >> >> > > > >> >> > what would be required. Either of those solutions
>> >> >> > > > >> >> > would
>> >> >> > > > >> >> > be limited
>> >> >> > > > >> >> > by
>> >> >> > > > >> >> > the speed of the ports(and the Grid itself), of
>> >> >> > > > >> >> > course.
>> >> >> > > > >> >> > Gigabit
>> >> >> > > > >> >> > speeds
>> >> >> > > > >> >> > are out of the question!
>> >> >> > > > >> >> > Another thought... The guy who put together the
>> >> >> > > > >> >> > Techworm
>> >> >> > > > >> >> > boot disk
>> >> >> > > > >> >> > also
>> >> >> > > > >> >> > had one called Networm, a single floppy that could do
>> >> >> > > > >> >> > a
>> >> >> > > > >> >> > dialup
>> >> >> > > > >> >> > internet
>> >> >> > > > >> >> > connection... (if you still have access to a dialup
>> >> >> > > > >> >> > service... if
>> >> >> > > > >> >> > not,
>> >> >> > > > >> >> > Budget Dial Up has a prepaid service that allows you
>> >> >> > > > >> >> > to
>> >> >> > > > >> >> > buy
>> >> >> > > > >> >> > just a
>> >> >> > > > >> >> > few
>> >> >> > > > >> >> > hours at a time).
>> >> >> > > > >> >> >
>> >> >> > > > >> >> > Generally speaking, if an old machine has either a
>> >> >> > > > >> >> > serial
>> >> >> > > > >> >> > or
>> >> >> > > > >> >> > parallel
>> >> >> > > > >> >> > port
>> >> >> > > > >> >> > and you can get it to boot into DOS, there is always
>> >> >> > > > >> >> > a
>> >> >> > > > >> >> > way
>> >> >> > > > >> >> > to
>> >> >> > > > >> >> > transfer
>> >> >> > > > >> >> > files to another machine. Even if it has no floppy
>> >> >> > > > >> >> > you
>> >> >> > > > >> >> > can use
>> >> >> > > > >> >> > another
>> >> >> > > > >> >> > DOS machine running Laplink. If it does have a
>> >> >> > > > >> >> > floppy
>> >> >> > > > >> >> > there are a
>> >> >> > > > >> >> > lot
>> >> >> > > > >> >> > of
>> >> >> > > > >> >> > file transfer programs out there, from Kermit to the
>> >> >> > > > >> >> > original
>> >> >> > > > >> >> > version
>> >> >> > > > >> >> > of
>> >> >> > > > >> >> > Procomm that will fit on a single floppy.
>> >> >> > > > >> >> >
>> >> >> > > > >> >> > The 1530 will run Windows 3.1 just fine with only 1MB
>> >> >> > > > >> >> > of
>> >> >> > > > >> >> > RAM... a
>> >> >> > > > >> >> > full
>> >> >> > > > >> >> > install takes (IIRC) about 7MB of hdd. Running Win95
>> >> >> > > > >> >> > would
>> >> >> > > > >> >> > be
>> >> >> > > > >> >> > tricky
>> >> >> > > > >> >> > and
>> >> >> > > > >> >> > would require some hardware tweaks even to make a
>> >> >> > > > >> >> > slow
>> >> >> > > > >> >> > machine...
>> >> >> > > > >> >> > kind
>> >> >> > > > >> >> > of
>> >> >> > > > >> >> > an extreme project. I've heard of a Linux distro
>> >> >> > > > >> >> > that
>> >> >> > > > >> >> > will fit on
>> >> >> > > > >> >> > a
>> >> >> > > > >> >> > single floppy and run on systems with limited
>> >> >> > > > >> >> > resources
>> >> >> > > > >> >> > (http://www.micheleandreoli.it/mulinux/mulinux.html)
>> >> >> > > > >> >> > but
>> >> >> > > > >> >> > even that
>> >> >> > > > >> >> > one
>> >> >> > > > >> >> > seems to want 4MB of RAM.
>> >> >> > > > >> >> >
>> >> >> > > > >> >> > There are plenty of people on the web who have too
>> >> >> > > > >> >> > much
>> >> >> > > > >> >> > time on
>> >> >> > > > >> >> > their
>> >> >> > > > >> >> > hands and are still playing with machines even older
>> >> >> > > > >> >> > than
>> >> >> > > > >> >> > the
>> >> >> > > > >> >> > Grid...
>> >> >> > > > >> >> > You
>> >> >> > > > >> >> > can still buy new after-market accessories for
>> >> >> > > > >> >> > Commodores,
>> >> >> > > > >> >> > for
>> >> >> > > > >> >> > example,
>> >> >> > > > >> >> > so
>> >> >> > > > >> >> > don't assume that there are no new solutions to old
>> >> >> > > > >> >> > problems.
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> > --- In RuGRiD-Laptop@yahoogroups.com, jim s <jws@>
>> >> >> > > > >> >> > wrote:
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >> On 10/8/2012 7:04 PM, Androgenoide wrote:
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >> > I used a Xircom PE3 Ethernet adapter. It converts
>> >> >> > > > >> >> >> > the
>> >> >> > > > >> >> >> > parallel
>> >> >> > > > >> >> >> > port
>> >> >> > > > >> >> >> > to
>> >> >> > > > >> >> >> > a NIC... although I've been wondering lately if it
>> >> >> > > > >> >> >> > might
>> >> >> > > > >> >> >> > not have
>> >> >> > > > >> >> >> > made
>> >> >> > > > >> >> >> > equally good sense to use a device server on the
>> >> >> > > > >> >> >> > serial
>> >> >> > > > >> >> >> > port...?
>> >> >> > > > >> >> >> > And,
>> >> >> > > > >> >> >> > of course, the Arachne browser... not many choices
>> >> >> > > > >> >> >> > for a
>> >> >> > > > >> >> >> > DOS
>> >> >> > > > >> >> >> > browser
>> >> >> > > > >> >> >> > are there? I used it to check my Yahoo web mail
>> >> >> > > > >> >> >> > and
>> >> >> > > > >> >> >> > I'll
>> >> >> > > > >> >> >> > have to
>> >> >> > > > >> >> >> > say
>> >> >> > > > >> >> >> > that it gave a whole new dimension of meaning to
>> >> >> > > > >> >> >> > the
>> >> >> > > > >> >> >> > word "slow."
>> >> >> > > > >> >> >> > Go
>> >> >> > > > >> >> >> > ahead, make a pot of tea while it's loading that
>> >> >> > > > >> >> >> > page,
>> >> >> > > > >> >> >> > it will be
>> >> >> > > > >> >> >> > a
>> >> >> > > > >> >> >> > while.
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >> > Sometimes it's fun to do things the hard way. Ran
>> >> >> > > > >> >> >> > into a
>> >> >> > > > >> >> >> > web page
>> >> >> > > > >> >> >> > last
>> >> >> > > > >> >> >> > week of a guy who was competing with a friend to
>> >> >> > > > >> >> >> > see
>> >> >> > > > >> >> >> > who
>> >> >> > > > >> >> >> > could
>> >> >> > > > >> >> >> > force
>> >> >> > > > >> >> >> > Windows XP to run with the least resources. It
>> >> >> > > > >> >> >> > won't
>> >> >> > > > >> >> >> > install
>> >> >> > > > >> >> >> > unless
>> >> >> > > > >> >> >> > it
>> >> >> > > > >> >> >> > sees at least 64MB of RAM and a Pentium processor
>> >> >> > > > >> >> >> > but,
>> >> >> > > > >> >> >> > once
>> >> >> > > > >> >> >> > installed
>> >> >> > > > >> >> >> > you can remove RAM and underclock the machine...
>> >> >> > > > >> >> >> > He
>> >> >> > > > >> >> >> > said
>> >> >> > > > >> >> >> > he got
>> >> >> > > > >> >> >> > one
>> >> >> > > > >> >> >> > machine to run with 20MB of RAM with a 20MHz clock
>> >> >> > > > >> >> >> > and
>> >> >> > > > >> >> >> > it took a
>> >> >> > > > >> >> >> > half
>> >> >> > > > >> >> >> > hour to boot.
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >> > I scored an HP 95LX a while back and someday, when
>> >> >> > > > >> >> >> > I
>> >> >> > > > >> >> >> > have nothing
>> >> >> > > > >> >> >> > else
>> >> >> > > > >> >> >> > to do (Hah!) it might be interesting to see if I
>> >> >> > > > >> >> >> > can
>> >> >> > > > >> >> >> > get
>> >> >> > > > >> >> >> > online
>> >> >> > > > >> >> >> > with
>> >> >> > > > >> >> >> > a
>> >> >> > > > >> >> >> > half meg of RAM and a 1MHz processor... (maybe
>> >> >> > > > >> >> >> > that
>> >> >> > > > >> >> >> > Contiki
>> >> >> > > > >> >> >> > OS/browser
>> >> >> > > > >> >> >> > could be ported to a 95LX?)... or maybe not...
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >> > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "techtalklive@"
>> >> >> > > > >> >> >> > <doug@> wrote:
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> > > Like the hack job? :O
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> > > Nice grab! So 1520 <> 386-marked screen...
>> >> >> > > > >> >> >> > > someone
>> >> >> > > > >> >> >> > > swapped
>> >> >> > > > >> >> >> > > screes?
>> >> >> > > > >> >> >> > > Should I take the kbd apart and clean it (will
>> >> >> > > > >> >> >> > > that
>> >> >> > > > >> >> >> > > likely
>> >> >> > > > >> >> >> > > fix it?) or look for a replacement?
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> > > So what can I do with this thing if I put more
>> >> >> > > > >> >> >> > > mem
>> >> >> > > > >> >> >> > > in
>> >> >> > > > >> >> >> > > it?
>> >> >> > > > >> >> >> > > Its all accessed funky through expaned mem
>> >> >> > > > >> >> >> > > methods,
>> >> >> > > > >> >> >> > > isn't it?
>> >> >> > > > >> >> >> > > I have a coprocessor I could put in this but not
>> >> >> > > > >> >> >> > > sure
>> >> >> > > > >> >> >> > > of
>> >> >> > > > >> >> >> > > the point there.
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> > > I think I might like to accomplish getting it on
>> >> >> > > > >> >> >> > > the
>> >> >> > > > >> >> >> > > web.
>> >> >> > > > >> >> >> > > I'd need the LAN hardware I guess.
>> >> >> > > > >> >> >> > > Any other ideas?
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> > > Oh yeah, one other funny thing. The P.S. has two
>> >> >> > > > >> >> >> > > contact on
>> >> >> > > > >> >> >> > > it that mate inside the cavity. But one of the
>> >> >> > > > >> >> >> > > two
>> >> >> > > > >> >> >> > > spring
>> >> >> > > > >> >> >> > > contacts
>> >> >> > > > >> >> >> > > inside is "rubberized", so only the one contact
>> >> >> > > > >> >> >> > > hits
>> >> >> > > > >> >> >> > > metal to
>> >> >> > > > >> >> >> > > metal.
>> >> >> > > > >> >> >> > > So the P.S. only works using the cord to go from
>> >> >> > > > >> >> >> > > the
>> >> >> > > > >> >> >> > > P.S. into
>> >> >> > > > >> >> >> > > the
>> >> >> > > > >> >> >> > > radial DC jack. Strange?
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> > > DC
>> >> >> > > > >> >> >> > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "jeriddian"
>> >> >> > > > >> >> >> > <Jeriddian@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > Great job, Doug!
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > Isn't it nice when you manage to salvage one
>> >> >> > > > >> >> >> > > > of
>> >> >> > > > >> >> >> > > > these
>> >> >> > > > >> >> >> > > > beautiful
>> >> >> > > > >> >> >> > machines? And yep, that's the way it works.
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > Once you restore battery power to the 1287A,
>> >> >> > > > >> >> >> > > > the
>> >> >> > > > >> >> >> > > > CMOS
>> >> >> > > > >> >> >> > > > registers
>> >> >> > > > >> >> >> > are again active. It's just that they're filled
>> >> >> > > > >> >> >> > with
>> >> >> > > > >> >> >> > nonsense, so
>> >> >> > > > >> >> >> > the
>> >> >> > > > >> >> >> > computer tells you the clock had stopped (which it
>> >> >> > > > >> >> >> > did),
>> >> >> > > > >> >> >> > and
>> >> >> > > > >> >> >> > simply
>> >> >> > > > >> >> >> > prompts you to reset the time. Once you do that
>> >> >> > > > >> >> >> > and
>> >> >> > > > >> >> >> > reboot,
>> >> >> > > > >> >> >> > everything's hunky-dory.
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > You can probably find some more 256K sticks
>> >> >> > > > >> >> >> > > > somewhere and
>> >> >> > > > >> >> >> > > > upgrade
>> >> >> > > > >> >> >> > the RAM to 2MB. Also consider upgrading the OS to
>> >> >> > > > >> >> >> > Ver.
>> >> >> > > > >> >> >> > 6.22.
>> >> >> > > > >> >> >> > Great
>> >> >> > > > >> >> >> > to
>> >> >> > > > >> >> >> > hear the HDD is good too.
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > I recently got a great deal. There was a 1520
>> >> >> > > > >> >> >> > > > on
>> >> >> > > > >> >> >> > > > sale on ebay
>> >> >> > > > >> >> >> > > > that
>> >> >> > > > >> >> >> > I looked at, however it was strange. It was
>> >> >> > > > >> >> >> > definitely
>> >> >> > > > >> >> >> > branded a
>> >> >> > > > >> >> >> > 1520,
>> >> >> > > > >> >> >> > and advertised that way, but the flip up screen
>> >> >> > > > >> >> >> > said
>> >> >> > > > >> >> >> > it
>> >> >> > > > >> >> >> > was a 386
>> >> >> > > > >> >> >> > machine. I decided to get it, and it was only
>> >> >> > > > >> >> >> > about
>> >> >> > > > >> >> >> > $90
>> >> >> > > > >> >> >> > with
>> >> >> > > > >> >> >> > shipping.
>> >> >> > > > >> >> >> > When I got the machine, I was very excited when it
>> >> >> > > > >> >> >> > began
>> >> >> > > > >> >> >> > to post,
>> >> >> > > > >> >> >> > because I got a full 8MB of RAM! It of course
>> >> >> > > > >> >> >> > displayed
>> >> >> > > > >> >> >> > the
>> >> >> > > > >> >> >> > configuration error 02 indicating the CMOS battery
>> >> >> > > > >> >> >> > was
>> >> >> > > > >> >> >> > dead. So I
>> >> >> > > > >> >> >> > opened it up. Unfortunately, it was also a DS1287A
>> >> >> > > > >> >> >> > model, but
>> >> >> > > > >> >> >> > that
>> >> >> > > > >> >> >> > was
>> >> >> > > > >> >> >> > no big deal. I decided to replace the DS1287A as I
>> >> >> > > > >> >> >> > had a
>> >> >> > > > >> >> >> > spare.
>> >> >> > > > >> >> >> > Imagine my surprise and joy when I took the
>> >> >> > > > >> >> >> > keyboard
>> >> >> > > > >> >> >> > off
>> >> >> > > > >> >> >> > to
>> >> >> > > > >> >> >> > discover
>> >> >> > > > >> >> >> > that not only was this really a 386 machine (a
>> >> >> > > > >> >> >> > 1530),
>> >> >> > > > >> >> >> > but it also
>> >> >> > > > >> >> >> > had
>> >> >> > > > >> >> >> > the math coprocessor 30387 chip as well! I
>> >> >> > > > >> >> >> > replaced
>> >> >> > > > >> >> >> > the
>> >> >> > > > >> >> >> > 1287A and
>> >> >> > > > >> >> >> > this
>> >> >> > > > >> >> >> > solved the configuration error just fine. But
>> >> >> > > > >> >> >> > alas, I
>> >> >> > > > >> >> >> > didn't get
>> >> >> > > > >> >> >> > a
>> >> >> > > > >> >> >> > triple crown winner here. The Conner drive was
>> >> >> > > > >> >> >> > definitely dead.
>> >> >> > > > >> >> >> > But
>> >> >> > > > >> >> >> > heck, getting another HDD is easy compared to the
>> >> >> > > > >> >> >> > other
>> >> >> > > > >> >> >> > benefits!
>> >> >> > > > >> >> >> > The
>> >> >> > > > >> >> >> > original owner of this machine definitely took
>> >> >> > > > >> >> >> > care
>> >> >> > > > >> >> >> > of
>> >> >> > > > >> >> >> > it.
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > Phil
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > > >
>> >> >> > > > >> >> >> > > > > It runs! Hard Disk is GOOD.
>> >> >> > > > >> >> >> > > > > I did a DS1287 hack to the machine today and
>> >> >> > > > >> >> >> > > > > ran
>> >> >> > > > >> >> >> > > > > the wires
>> >> >> > > > >> >> >> > > > > to
>> >> >> > > > >> >> >> > > > > a
>> >> >> > > > >> >> >> > convenient place for the battery. Upon power up it
>> >> >> > > > >> >> >> > said
>> >> >> > > > >> >> >> > > > > that the RTC was stopped, and it needed
>> >> >> > > > >> >> >> > > > > setting.
>> >> >> > > > >> >> >> > > > > The "stopped" message threw me, I thought
>> >> >> > > > >> >> >> > > > > something was
>> >> >> > > > >> >> >> > > > > wrong
>> >> >> > > > >> >> >> > > > > with
>> >> >> > > > >> >> >> > > > > the chip. It took an F1 to continue and went
>> >> >> > > > >> >> >> > > > > right
>> >> >> > > > >> >> >> > > > > through
>> >> >> > > > >> >> >> > > > > POST
>> >> >> > > > >> >> >> > and Autoexec.
>> >> >> > > > >> >> >> > > > > Using TIME and DATE in the GRIDUTIL
>> >> >> > > > >> >> >> > > > > directory
>> >> >> > > > >> >> >> > > > > set
>> >> >> > > > >> >> >> > > > > the RTC.
>> >> >> > > > >> >> >> > > > > Now it boots cleanly.
>> >> >> > > > >> >> >> > > > > Has Lotus123 on the HD.
>> >> >> > > > >> >> >> > > > > I posted updated pics in "Dougs 1530
>> >> >> > > > >> >> >> > > > > stuff"...
>> >> >> > > > >> >> >> > > > > page 2!
>> >> >> > > > >> >> >> > > > > The only remaining issue is that a few keys
>> >> >> > > > >> >> >> > > > > on
>> >> >> > > > >> >> >> > > > > the
>> >> >> > > > >> >> >> > > > > keyboard
>> >> >> > > > >> >> >> > > > > don't work. 123Q and spacebar. From an
>> >> >> > > > >> >> >> > > > > external
>> >> >> > > > >> >> >> > > > > kbd
>> >> >> > > > >> >> >> > > > > everything
>> >> >> > > > >> >> >> > > > > works.
>> >> >> > > > >> >> >> > > > > Wow. I have am the proud owner of a DOS 4.01
>> >> >> > > > >> >> >> > > > > 386
>> >> >> > > > >> >> >> > > > > with 1MB
>> >> >> > > > >> >> >> > > > > RAM,
>> >> >> > > > >> >> >> > > > > a
>> >> >> > > > >> >> >> > half full 10MB hard disk and 3.5" floppy. Some
>> >> >> > > > >> >> >> > smokin'
>> >> >> > > > >> >> >> > system!
>> >> >> > > > >> >> >> > > > >
>> >> >> > > > >> >> >> > > > >
>> >> >> > > > >> >> >> > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > > > >
>> >> >> > > > >> >> >> > > > > > Thanks so much that was great info. I had
>> >> >> > > > >> >> >> > > > > > no
>> >> >> > > > >> >> >> > > > > > idea on the
>> >> >> > > > >> >> >> > > > > > X2
>> >> >> > > > >> >> >> > > > > > being a rating. May have to try it without
>> >> >> > > > >> >> >> > > > > > them
>> >> >> > > > >> >> >> > > > > > just to
>> >> >> > > > >> >> >> > > > > > make sure the rest of it is still good.
>> >> >> > > > >> >> >> > > > > >
>> >> >> > > > >> >> >> > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "fullsizewagon"
>> >> >> > > > >> >> >> > <andrebakken@> wrote:
>> >> >> > > > >> >> >> > > > > > >
>> >> >> > > > >> >> >> > > > > > > Notice that's 250V AC, not DC, which
>> >> >> > > > >> >> >> > > > > > > makes
>> >> >> > > > >> >> >> > > > > > > a
>> >> >> > > > >> >> >> > > > > > > big
>> >> >> > > > >> >> >> > > > > > > difference.
>> >> >> > > > >> >> >> > The X2 also signifies they're an enhanced type
>> >> >> > > > >> >> >> > meant
>> >> >> > > > >> >> >> > to
>> >> >> > > > >> >> >> > go
>> >> >> > > > >> >> >> > directly
>> >> >> > > > >> >> >> > across the mains. Be sure to get X2 rated
>> >> >> > > > >> >> >> > replacements.
>> >> >> > > > >> >> >> > > > > > > The PSU will work without those cap's in
>> >> >> > > > >> >> >> > > > > > > place, but
>> >> >> > > > >> >> >> > > > > > > will
>> >> >> > > > >> >> >> > radiate more interference/noise out onto the
>> >> >> > > > >> >> >> > mains.
>> >> >> > > > >> >> >> > > > > > >
>> >> >> > > > >> >> >> > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > There are two in there that are the
>> >> >> > > > >> >> >> > > > > > > > same.
>> >> >> > > > >> >> >> > > > > > > > .15uF 250V I think I can replace them.
>> >> >> > > > >> >> >> > > > > > > > Polyprop I think. Radial type in a
>> >> >> > > > >> >> >> > > > > > > > square
>> >> >> > > > >> >> >> > > > > > > > package.
>> >> >> > > > >> >> >> > > > > > > > The bottom is clear so you can see the
>> >> >> > > > >> >> >> > > > > > > > radial shape.
>> >> >> > > > >> >> >> > > > > > > > I have them out already.
>> >> >> > > > >> >> >> > > > > > > > Thanks for the tip on the 1287A
>> >> >> > > > >> >> >> > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > DC
>> >> >> > > > >> >> >> > > > > ; > >
>> >> >> > > > >> >> >> > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "jeriddian"
>> >> >> > > > >> >> >> > <Jeriddian@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > Good Find, DC
>> >> >> > > > >> >> >> > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > I guess they got burnt to the point
>> >> >> > > > >> >> >> > > > > > > > > where
>> >> >> > > > >> >> >> > > > > > > > > you can't
>> >> >> > > > >> >> >> > identify the capcity amount. Could you give me the
>> >> >> > > > >> >> >> > output voltage
>> >> >> > > > >> >> >> > and
>> >> >> > > > >> >> >> > amperage? I'll look through my units and see if I
>> >> >> > > > >> >> >> > can
>> >> >> > > > >> >> >> > identify
>> >> >> > > > >> >> >> > them
>> >> >> > > > >> >> >> > for you.
>> >> >> > > > >> >> >> > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > Phil
>> >> >> > > > >> >> >> > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > --- In RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > > I posted pictures of what looks
>> >> >> > > > >> >> >> > > > > > > > > > like
>> >> >> > > > >> >> >> > > > > > > > > > a
>> >> >> > > > >> >> >> > > > > > > > > > failed cap
>> >> >> > > > >> >> >> > > > > > > > > > in
>> >> >> > > > >> >> >> > the ext p.s. unit. A stinky melt down!
>> >> >> > > > >> >> >> > > > > > > > > > I'm supposing I can replace these.
>> >> >> > > > >> >> >> > > > > > > > > > Any identification tips welcome,
>> >> >> > > > >> >> >> > > > > > > > > > thanks.
>> >> >> > > > >> >> >> > > > > > > > > > There appears to be two of the
>> >> >> > > > >> >> >> > > > > > > > > > same
>> >> >> > > > >> >> >> > > > > > > > > > caps, would
>> >> >> > > > >> >> >> > replace both
>> >> >> > > > >> >> >> > > > > > > > > > of course.
>> >> >> > > > >> >> >> > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > > DC
>> >> >> > > > >> >> >> > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > > --- In
>> >> >> > > > >> >> >> > > > > > > > > > RuGRiD-Laptop@yahoogroups.com
>> >> >> > > > >> >> >> > <mailto:RuGRiD-Laptop%40yahoogroups.com>,
>> >> >> > > > >> >> >> > "techtalklive@" <doug@>
>> >> >> > > > >> >> >> > wrote:
>> >> >> > > > >> >> >> > > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > > > I am considering tackling the
>> >> >> > > > >> >> >> > > > > > > > > > > repair
>> >> >> > > > >> >> >> > > > > > > > > > > of a 1530
>> >> >> > > > >> >> >> > > > > > > > > > > that
>> >> >> > > > >> >> >> > > > > > > > > > > does not respond to the power
>> >> >> > > > >> >> >> > > > > > > > > > > switch.
>> >> >> > > > >> >> >> > > > > > > > > > > The power
>> >> >> > > > >> >> >> > > > > > > > > > > supply
>> >> >> > > > >> >> >> > > > > > > > > > > module measures 16.35v so I
>> >> >> > > > >> >> >> > > > > > > > > > > think
>> >> >> > > > >> >> >> > > > > > > > > > > its
>> >> >> > > > >> >> >> > > > > > > > > > > fine
>> >> >> > > > >> >> >> > (unfortunately,
>> >> >> > > > >> >> >> > > > > > > > > > > that would have been an easy
>> >> >> > > > >> >> >> > > > > > > > > > > problem
>> >> >> > > > >> >> >> > > > > > > > > > > isolation!)
>> >> >> > > > >> >> >> > > > > > > > > > > So its something internal. I
>> >> >> > > > >> >> >> > > > > > > > > > > have
>> >> >> > > > >> >> >> > > > > > > > > > > the
>> >> >> > > > >> >> >> > > > > > > > > > > service
>> >> >> > > > >> >> >> > > > > > > > > > > manuals
>> >> >> > > > >> >> >> > > > > > > > > > > downloaded but I thought maybe
>> >> >> > > > >> >> >> > > > > > > > > > > I'd
>> >> >> > > > >> >> >> > > > > > > > > > > get
>> >> >> > > > >> >> >> > > > > > > > > > > some
>> >> >> > > > >> >> >> > > > > > > > > > > pointers
>> >> >> > > > >> >> >> > form
>> >> >> > > > >> >> >> > > > > > > > > > > folks who have already performed
>> >> >> > > > >> >> >> > > > > > > > > > > cold
>> >> >> > > > >> >> >> > > > > > > > > > > stone
>> >> >> > > > >> >> >> > > > > > > > > > > dead
>> >> >> > > > >> >> >> > diagnosis.
>> >> >> > > > >> >> >> > > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > > > If I don't dive into this FYI
>> >> >> > > > >> >> >> > > > > > > > > > > this
>> >> >> > > > >> >> >> > > > > > > > > > > very clean
>> >> >> > > > >> >> >> > > > > > > > > > > 1530
>> >> >> > > > >> >> >> > > > > > > > > > > will
>> >> >> > > > >> >> >> > > > > > > > > > > be available for parts/repair!
>> >> >> > > > >> >> >> > > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > > > Thanks in advance,
>> >> >> > > > >> >> >> > > > > > > > > > > DC
>> >> >> > > > >> >> >> > > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > > >
>> >> >> > > > >> >> >> > > > > > > >
>> >> >> > > > >> >> >> > > > > > >
>> >> >> > > > >> >> >> > > > > >
>> >> >> > > > >> >> >> > > > >
>> >> >> > > > >> >> >> > > >
>> >> >> > > > >> >> >> > >
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >> Since we are on the topic of TCP does anyone have a
>> >> >> > > > >> >> >> formula stashed
>> >> >> > > > >> >> >> that
>> >> >> > > > >> >> >> can be easily had to run say serial (probably ppp)
>> >> >> > > > >> >> >> from
>> >> >> > > > >> >> >> something
>> >> >> > > > >> >> >> like
>> >> >> > > > >> >> >> a
>> >> >> > > > >> >> >> small system like the raspberry pi serially to a
>> >> >> > > > >> >> >> system
>> >> >> > > > >> >> >> with dos
>> >> >> > > > >> >> >> and a
>> >> >> > > > >> >> >> stack? It's been so long since I messed with dos
>> >> >> > > > >> >> >> environment
>> >> >> > > > >> >> >> networking
>> >> >> > > > >> >> >> I forget.
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >> I think windows of some sort had trumpet to handle
>> >> >> > > > >> >> >> part
>> >> >> > > > >> >> >> of
>> >> >> > > > >> >> >> the
>> >> >> > > > >> >> >> equation,
>> >> >> > > > >> >> >> but I don' t have any references right now over a
>> >> >> > > > >> >> >> dos
>> >> >> > > > >> >> >> stack.
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >> Probably something to do windows 3.1 or win95 /
>> >> >> > > > >> >> >> win98
>> >> >> > > > >> >> >> would be
>> >> >> > > > >> >> >> better,
>> >> >> > > > >> >> >> but I don't know if the hardware here would be up to
>> >> >> > > > >> >> >> those
>> >> >> > > > >> >> >> os's.
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >> Of course a 1.2mb or 1.44 mb live floppy boot would
>> >> >> > > > >> >> >> be
>> >> >> > > > >> >> >> nice too.
>> >> >> > > > >> >> >> I'm
>> >> >> > > > >> >> >> asking for everything here. Objective is to have
>> >> >> > > > >> >> >> something that
>> >> >> > > > >> >> >> could
>> >> >> > > > >> >> >> suck off or load a disk image with a floppy boot. I
>> >> >> > > > >> >> >> suspect it was
>> >> >> > > > >> >> >> a
>> >> >> > > > >> >> >> difficult thing to get going in the day, though, and
>> >> >> > > > >> >> >> even
>> >> >> > > > >> >> >> wors now.
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >> jim
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >> > ,___
>> >> >> > > > >> >> >> >
>> >> >> > > > >> >> >>
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> > ------------------------------------
>> >> >> > > > >> >> >
>> >> >> > > > >> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
>> >> >> > > > >> >> > Groups
>> >> >> > > > >> >> > Links
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >> >
>> >> >> > > > >> >>
>> >> >> > > > >> >
>> >> >> > > > >> >
>> >> >> > > > >> >
>> >> >> > > > >> >
>> >> >> > > > >> > ------------------------------------
>> >> >> > > > >> >
>> >> >> > gt; > >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo!
>> >> >> > Groups
>> >> >> > Links
>> >> >> > > > >> >
>> >> >> > > > >> >
>> >> >> > > > >> >
>> >> >> > > > >>
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > > ------------------------------------
>> >> >> > > > >
>> >> >> > > > > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups
>> >> >> > > > > Links
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > > >
>> >> >> > > >
>> >> >> > >
>> >> >> >
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> ------------------------------------
>> >> >>
>> >> >> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------
>> >> >
>> >> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >> >
>> >> >
>> >> >
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> http://groups.yahoo.com/group/rugrid-laptop/Yahoo! Groups Links
>
>
>
Date: Tue, 23 Oct 2012 04:01:38 -0000
From: "techtalklive@..."
Subject: 1530 AC/DC Power
In interest of preserving my GRiD power pack I did a substition,
for now. Here's how it went:
The GRiD pack is marked on the AC Side
100-200V ~50/60/400Hz 80W
and on the DC Side:
60 Watt Power Suppy
Input: 100-200VAC 50/60Hz 1.5A
Output 16.25VDC 3.7A
Used in GRiDCase 12xx,13xx,15xx GRiDLite 10xx and 3402 Drive
GRiD PN 105572-00
MicroEnergy PN 10-0100
The measured the draw of my 1530 running by itself is, in practice
.47A, 27W, @110V using a KillAWatt meter.
I had an old 16V TARGA univeral laptop pack, the old thin job,
sitting around in a junk box. The DC jack fit the GRiD :)
It is marked 16V 1A@110V, which seems to be a good 2x margin
over the running drawl of the GRiD as it sits.
Maybe this will get closer if I get the 1MB RAM upgrade to 8MB :O
The targa runs moderately warm, less hot than the GRiD pack,
so I think all is OK.
Pictures are posted in Dougs 1530 stuff.
Date: Tue, 23 Oct 2012 07:02:45 -0000
From: "Paolo Binotti"
Subject: Military GridCase 1590
I'm uploading same images af my GridCase 1590.... military Laptop with a strange keyboard...
Any idea about its use ?
Thanks for Your cooperation
Paolo
Date: Sat, 27 Oct 2012 00:45:02 -0000
From: "techtalklive@..."
Subject: Scored something...
http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Looks like Honeywell released a specially configured GRiD for
their purposes.
Should I keep it together or use it for parts?
There is very little I can find on the web about it.
Date: Sat, 27 Oct 2012 03:10:34 -0000
From: "jeriddian"
Subject: Re: Scored something...
I have one of these. I bought it a few years ago off Ebay.
These are standard GRiD 1520 machines, 1MB RAM, with two floppy drives. They have no Hard Disk at all. The only thing different about them is that they have Honeywell software put on them for a very specific purpose, which as best as I can remember is data tranfer to and from other systems. If I remember correctly also, the one I have had a Tadiran battery for the CMOS instead of a Dallas RTC chip. Much easier to replace.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
>
> Looks like Honeywell released a specially configured GRiD for
> their purposes.
>
> Should I keep it together or use it for parts?
>
> There is very little I can find on the web about it.
>
Date: Sat, 27 Oct 2012 21:56:53 -0000
From: "Shawnerz"
Subject: Re: Scored something...
Phil,
Yup, looks like a 1520.
You said they had Honeywell software. Was that on floppy, a special ROM, or was there a special BIOS build for Honeywell?
Thanks,
-Shawn
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> I have one of these. I bought it a few years ago off Ebay.
>
> These are standard GRiD 1520 machines, 1MB RAM, with two floppy drives. They have no Hard Disk at all. The only thing different about them is that they have Honeywell software put on them for a very specific purpose, which as best as I can remember is data tranfer to and from other systems. If I remember correctly also, the one I have had a Tadiran battery for the CMOS instead of a Dallas RTC chip. Much easier to replace.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> >
> > http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
> >
> > Looks like Honeywell released a specially configured GRiD for
> > their purposes.
> >
> > Should I keep it together or use it for parts?
> >
> > There is very little I can find on the web about it.
> >
>
Date: Sun, 28 Oct 2012 01:26:35 -0000
From: "jeriddian"
Subject: Re: Scored something...
Shawn,
As I recall, there was a EPROM on board for that purpose. The computer would automatically launch into the Honeywell program and give an option either to start operating it, or exit out to DOS.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Shawnerz" <shawnerz@...> wrote:
>
> Phil,
> Yup, looks like a 1520.
> You said they had Honeywell software. Was that on floppy, a special ROM, or was there a special BIOS build for Honeywell?
> Thanks,
> -Shawn
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > I have one of these. I bought it a few years ago off Ebay.
> >
> > These are standard GRiD 1520 machines, 1MB RAM, with two floppy drives. They have no Hard Disk at all. The only thing different about them is that they have Honeywell software put on them for a very specific purpose, which as best as I can remember is data tranfer to and from other systems. If I remember correctly also, the one I have had a Tadiran battery for the CMOS instead of a Dallas RTC chip. Much easier to replace.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > >
> > > http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
> > >
> > > Looks like Honeywell released a specially configured GRiD for
> > > their purposes.
> > >
> > > Should I keep it together or use it for parts?
> > >
> > > There is very little I can find on the web about it.
> > >
> >
>
Date: Sun, 28 Oct 2012 07:10:09 -0000
From: "Douglas"
Subject: Re: Scored something...
Does that suggest the eprom can be changed to a std grid?
Or something else using the grid eprom utilities?
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Shawn,
>
> As I recall, there was a EPROM on board for that purpose. The computer would automatically launch into the Honeywell program and give an option either to start operating it, or exit out to DOS.
>
> Phil
>
> --- In RuGRiD-Laptop@yahoogroups.com, "Shawnerz" <shawnerz@> wrote:
> >
> > Phil,
> > Yup, looks like a 1520.
> > You said they had Honeywell software. Was that on floppy, a special ROM, or was there a special BIOS build for Honeywell?
> > Thanks,
> > -Shawn
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > >
> > > I have one of these. I bought it a few years ago off Ebay.
> > >
> > > These are standard GRiD 1520 machines, 1MB RAM, with two floppy drives. They have no Hard Disk at all. The only thing different about them is that they have Honeywell software put on them for a very specific purpose, which as best as I can remember is data tranfer to and from other systems. If I remember correctly also, the one I have had a Tadiran battery for the CMOS instead of a Dallas RTC chip. Much easier to replace.
> > >
> > > Phil
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > >
> > > > http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
> > > >
> > > > Looks like Honeywell released a specially configured GRiD for
> > > > their purposes.
> > > >
> > > > Should I keep it together or use it for parts?
> > > >
> > > > There is very little I can find on the web about it.
> > > >
> > >
> >
>
Date: Mon, 29 Oct 2012 03:21:46 -0000
From: "jeriddian"
Subject: Re: Scored something...
Yes, You can put in a regular EPROM programmed with DOS or whatever you want.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Douglas" <memphis@...> wrote:
>
> Does that suggest the eprom can be changed to a std grid?
> Or something else using the grid eprom utilities?
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > Shawn,
> >
> > As I recall, there was a EPROM on board for that purpose. The computer would automatically launch into the Honeywell program and give an option either to start operating it, or exit out to DOS.
> >
> > Phil
> >
> > --- In RuGRiD-Laptop@yahoogroups.com, "Shawnerz" <shawnerz@> wrote:
> > >
> > > Phil,
> > > Yup, looks like a 1520.
> > > You said they had Honeywell software. Was that on floppy, a special ROM, or was there a special BIOS build for Honeywell?
> > > Thanks,
> > > -Shawn
> > >
> > > --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> > > >
> > > > I have one of these. I bought it a few years ago off Ebay.
> > > >
> > > > These are standard GRiD 1520 machines, 1MB RAM, with two floppy drives. They have no Hard Disk at all. The only thing different about them is that they have Honeywell software put on them for a very specific purpose, which as best as I can remember is data tranfer to and from other systems. If I remember correctly also, the one I have had a Tadiran battery for the CMOS instead of a Dallas RTC chip. Much easier to replace.
> > > >
> > > > Phil
> > > >
> > > > --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" <doug@> wrote:
> > > > >
> > > > > http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
> > > > >
> > > > > Looks like Honeywell released a specially configured GRiD for
> > > > > their purposes.
> > > > >
> > > > > Should I keep it together or use it for parts?
> > > > >
> > > > > There is very little I can find on the web about it.
> > > > >
> > > >
> > >
> >
>
Date: Mon, 29 Oct 2012 03:55:01 -0000
From: "Douglas"
Subject: Re: Scored something...
--- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@...> wrote:
>
> Yes, You can put in a regular EPROM programmed with DOS or whatever you want.
>
> Phil
Well that seems like a worthy project!
I'm going to have to think about that.
Chime in if you have put anything interesting into your GRiD
ROMs!
Hmmmmm!
Date: Mon, 29 Oct 2012 15:22:47 -0000
From: "jeriddian"
Subject: Re: Scored something...
Sure, most ROM chips I've seen put in there usually contain an operating system, usually DOS of some version, But there have been some chips that will have other programs like Lotus 1-2-3, Wordperfect 5.1 or 6.1, Microsoft word, early version, Excel, etc. You can actually program your own EPROMS with whatever software you want to put on it. I'm not quite sure how to do that myself, to be honest, but it can be be done. Your only limit is the 128k limit of the space on the ROM chip.
Phil
--- In RuGRiD-Laptop@yahoogroups.com, "Douglas" <memphis@...> wrote:
>
>
>
> --- In RuGRiD-Laptop@yahoogroups.com, "jeriddian" <Jeriddian@> wrote:
> >
> > Yes, You can put in a regular EPROM programmed with DOS or whatever you want.
> >
> > Phil
>
> Well that seems like a worthy project!
> I'm going to have to think about that.
>
> Chime in if you have put anything interesting into your GRiD
> ROMs!
>
> Hmmmmm!
>
Date: Mon, 29 Oct 2012 15:52:50 -0000
From: "Douglas"
Subject: Re: Scored something...
text/plain; charset="iso-8859-1"
A Honeywell Loader PC Manual!
<https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja\
&ved=0CDYQFjAE&url=https%3A%2F%2Fwww.honeywellprocess.com%2Flibrary%2Fma\
rketing%2Ftech-specs%2FLO-03-01.pdf&ei=QKWOUM66Cab00gGei4GYDQ&>
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...>
wrote:
>
>
http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3\
984.m1497.l2649
>
> Looks like Honeywell released a specially configured GRiD for
> their purposes.
>
> Should I keep it together or use it for parts?
>
> There is very little I can find on the web about it.
>
Date: Mon, 29 Oct 2012 10:29:24 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Re: Scored something...
text/plain; charset=iso-8859-1
Doug,
Did I miss something? It appears to link to the analog displays for a tempature controller.
-SHawn
________________________________
From: Douglas <memphis@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Monday, October 29, 2012 11:52 AM
Subject: [RuGRiD-Laptop] Re: Scored something...
A Honeywell Loader PC Manual!
--- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@..." <doug@...> wrote:
>
> http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
>
> Looks like Honeywell released a specially configured GRiD for
> their purposes.
>
> Should I keep it together or use it for parts?
>
> There is very little I can find on the web about it.
>
Date: Mon, 29 Oct 2012 18:19:36 -0000
From: "techtalklive@..."
Subject: Re: Scored something...
text/plain; charset="iso-8859-1"
ARGH. Too much going on.
One more time...
Honeywell Loader Terminal Manual
<http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&\
ved=0CCsQFjAC&url=http%3A%2F%2Fdownloads.applied-automation.com%2Fsam%2F\
honeywell%2F620%2Fmanuals%2F6208982.pdf&ei=fseOUOX4Bqu60AGroICYCQ&usg=AF\
QjCNFVwk5DjtMx6tUMHcQzBNwbiiXtRg>
Also posted in the files under a folder of similar name.
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> Doug,
> Did I miss something? It appears to link to the analog displays for a
tempature controller.
> -SHawn
>
>
> ________________________________
> From: Douglas memphis@...
> To: RuGRiD-Laptop@yahoogroups.com
> Sent: Monday, October 29, 2012 11:52 AM
> Subject: [RuGRiD-Laptop] Re: Scored something...
>
>
>
>
>
> A Honeywell Loader PC Manual!
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" doug@ wrote:
> >
> >
http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3\
984.m1497.l2649
> >
> > Looks like Honeywell released a specially configured GRiD for
> > their purposes.
> >
> > Should I keep it together or use it for parts?
> >
> > There is very little I can find on the web about it.
> >
>
Date: Mon, 29 Oct 2012 14:45:35 -0700 (PDT)
From: Shawnerz
Subject: Re: [RuGRiD-Laptop] Re: Scored something...
text/plain; charset=iso-8859-1
Wow. That's a big file. But I downloaded it and will look it over later.
Looks interesting. Thanks for the link.
-Shawn
________________________________
From: "techtalklive@..." <doug@...>
To: RuGRiD-Laptop@yahoogroups.com
Sent: Monday, October 29, 2012 2:19 PM
Subject: [RuGRiD-Laptop] Re: Scored something...
ARGH. Too much going on.
One more time...
Honeywell Loader Terminal Manual
Also posted in the files under a folder of similar name.
--- In RuGRiD-Laptop@yahoogroups.com, Shawnerz <shawnerz@...> wrote:
>
> Doug,
> Did I miss something? It appears to link to the analog displays for a tempature controller.
> -SHawn
>
>
> ________________________________
> From: Douglas memphis@...
> To: RuGRiD-Laptop@yahoogroups.com
> Sent: Monday, October 29, 2012 11:52 AM
> Subject: [RuGRiD-Laptop] Re: Scored something...
>
>
>
>
>
> A Honeywell Loader PC Manual!
>
> --- In RuGRiD-Laptop@yahoogroups.com, "techtalklive@" doug@ wrote:
> >
> > http://www.ebay.com/itm/251170311075?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
> >
> > Looks like Honeywell released a specially configured GRiD for
> > their purposes.
> >
> > Should I keep it together or use it for parts?
> >
> > There is very little I can find on the web about it.
> >
>
Date: Mon, 29 Oct 2012 23:45:43 -0000
From: "jadersch"
Subject: Spare Gridcase 3+ system boards?
Hi all --
I'm new to the list and I have a small collection of GRiD systems (A Compass II, a Convertible 486 (2270) and a GridCase 3+).
The last of these I acquired recently and it's suffered some major damage to the system board due to an exploding RTC battery. It's questionable whether it's possible to repair the damage, and before I start along that path I thought I'd ask whether anyone here has any boards going spare.
Thanks!
Josh