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IBM PS/1 Consultant 1993 with Sound blaster.

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Reply 40 of 66, by Intel486dx33

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Actually, i have one ps/1 installed with wib95b and it works okay.
But it has 32mb of ram and a 540mb 5400rpm EIDE drive and intel overdrive cpu 46sx2-50mhz.
So it is not stock hardware.
This would have costs about $6,500 in 1993

Reply 41 of 66, by Intel486dx33

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Anonymous Coward wrote:

Between 1992-1995 IBMs were a serious ripoff. They still pretended their machines were relevant and charged twice as the competition for basically the same thing.

Caluser2000 wrote:

Goodness only 50%. From previous posts by other members here you would've thought 486s were dropped as soon as the P60s were released 1993.

No kidding. Nobody really bought Pentiums until 1995. Only organisations and uninformed rich jerks bought Socket4 before the P54C came out. I remember 1995 as the year that normies started buying DX2-66 in volume. The 486 was definitely still a thing 1995. Windows 95 effectively killed off the 486. It was one of the first must have software that made the 486 feel like a slow piece of shit. I switched back to 3.x and tried to ignore it, but that became hard when the industry focused on software for 95 and eventually gave up on 3.x. Windows 95 was only really okay on a DX4 or 5x86 if you had 16MB of RAM. I know some people claim that a DX-33 with 8MB is good enough, but those people are masochists.

What I really like about these IBM PS/1’s are the install of DOS and Win3x and the IBM menus, apps, and recovery tools.
They provide allot of tools and batch files for restoring the PS/1 back to default.
Allot of easy configuration tools too.
Kind of like a Mac in how easy it is to configure and learn with the programs and tools IBM provided in the default setup.

All PC’s running DOS / Win3x should have had a menu system like this.
It makes learning and running DOS/Win3x really easy.

I would have like to have one of these back in early PC days( 1985-1993 ).

Reply 42 of 66, by Caluser2000

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Quite few of the bigger OEMs system set ups were similar, having 3rd party tools as well as tutorials included in the default installation.. Maybe that could be another thread on it's own. Amstrad for example shipped systems in 1990 with Counterpoint.

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It had a tutorial built in and dos utility assistace

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Compaq shipped TabWorks with their systems. HP had a very nice nice Dos menu with tutorial included. Windows really didn't be come relevant in the market place until 3.0 was shipped. Then 3.1 bundled with systems. Though Zenith supported MS with the project from the early days.

And of course prior to 1990 IBM/MS were pushing MCA and OS/2 as a replacement for Dos. Most of the industry ignored them apart from implementing vga. MS didn't want to continue the 286 OS/2 support which IBM wouldn't agree to and the the famous lovers break up. IBM saw their error and released the PS/1 and PS/ValuePoint lines to grab back some of the market share.

There's a glitch in the matrix.
A founding member of the 286 appreciation society.
Apparently 32-bit is dead and nobody likes P4s.
Of course, as always, I'm open to correction...😉

Reply 43 of 66, by Intel486dx33

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What is the best way to shut down this computer becasue it just goes in a loop.
The IBM menu system makes this computer just go in a loop.
When in Win3.1 I can exit to IBM DOS menu and then exit to command line DOS.
But the power button will NOT work then. It just exits DOS back to Win3x.

So what is the best way to shut down this computer?
Did IBM provide a solution for this ?

I have an original IBM installation of DOS 6.21 and Win3.1

Reply 44 of 66, by Caluser2000

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Push the POWER button. Front lower right colored WHITE. You know that BIG switch. Press IN for start and you will see some pretty lights. Press IN again for stop the pretty lights will go out.

There's a glitch in the matrix.
A founding member of the 286 appreciation society.
Apparently 32-bit is dead and nobody likes P4s.
Of course, as always, I'm open to correction...😉

Reply 46 of 66, by Intel486dx33

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Actually, I have a IBM PS/1 Multimedia edition. It must have been one of the first generation but it does not have VLB it is all ISA.
And it came with a Intel 486dx2-50mhz CPU and Sound Blaster 1740 sound card and 2x Panasonic CDROM drive.
8kb cache and 8mb ram.

So most of the IBM PS/1 computers from 1993 and 1994 are basically the same. Being with the onboard Intel 486sx-25 CPU
You can upgrade the CPU, RAM, Cache, and add a Sound Blaster card.

The 1994 Multimedia edition may have 32bit bus IDE controller. I am not sure.

You are right. 1993 was a strange time for Multimedia computers. Builders where pushing the capabilities of the computers with minimum hardware specs and marketing these computers as “Multimedia computers”.

But I think they where very under powered to have been a good performance multimedia computer.

A Better build would have been this
486dx2-66
256kb cache
8mb ram
4x CDROM drive
VGA video
16-bit sound card.
Color SVGA monitor.

Reply 47 of 66, by Intel486dx33

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CPU and Cache jumper settings. Video ram and onboard video.

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Reply 48 of 66, by Intel486dx33

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I have another Intel Over drive CPU to try out.
Its a ( 25mhz x 2 ) for at total of 50mhz. But this one is a DX2 model.
The other one was an SX 33mhz model.

So I will be testing this computer to see which works bests.
It is getting harder to find these 169 pin Intel over drive CPUs.

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Reply 49 of 66, by Intel486dx33

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I just picked up a 33mhz bus Intel over drive CPU that I will test out.
These 169-pin CPU are getting hard to find.

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Reply 50 of 66, by Intel486dx33

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Here is a link to the hardware manual:
http://ps-2.kev009.com/pccbbs/aptiva/63g2028.pdf

See My other IBM Ps/1 restore posts:
IBM PS/1 Multimedia ( max restore ).

Cache upgrade info:
I just used standard Cache ( 20ns ) 256kb ( 9 pieces , All the same cache type even for TAG ).

CPU upgrade info:
Check the hardware manual for your motherboard type because there were many IBM PS/1 versions produced and
It all depended on where you purchased the PS/1 they all had a different version of motherboard.
This was a marketing scheme by IBM.

But there is a jumper on the motherboard to switch the BUS speed from 25mhz or 33mhz.
For a 486-25 or a 486-50 you need to use a 25mhz bus speed.
For all other 486 CPU’s including Overdrive CPU’s you need to switch the BUS speed to 33mhz.

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Reply 51 of 66, by BLockOUT

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Intel486dx33 wrote on 2021-08-25, 22:16:
CPU upgrade info: Check the hardware manual for your motherboard type because there were many IBM PS/1 versions produced and It […]
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CPU upgrade info:
Check the hardware manual for your motherboard type because there were many IBM PS/1 versions produced and
It all depended on where you purchased the PS/1 they all had a different version of motherboard.
This was a marketing scheme by IBM.

But there is a jumper on the motherboard to switch the BUS speed from 25mhz or 33mhz.
For a 486-25 or a 486-50 you need to use a 25mhz bus speed.
For all other 486 CPU’s including Overdrive CPU’s you need to switch the BUS speed to 33mhz.

hey, i have the same motherboard as you have made in the UK here are pictures of mine, but on the manual and on the motherboard, there is no sign of a 33mhz jumper.
are you sure there is one? can you show me where it is?

Whats-App-Image-2021-05-04-at-1-21-32-PM.jpg

ppl.jpg

ppl2.jpg

ppl3.jpg

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Reply 52 of 66, by Intel486dx33

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See my posts above with the manual white pages.
It shows the jumper settings for 486dx2.
Use that jumper setting for 33mhz. CPU
Or maybe it was the Pentium overdrive CPU setting.

You need to switch the jumpers for 286kb of cache too when used.

See photos above.

Update:
Actually, your motherboard is different from mine.
I don’t see your motherboard in the hardware manual.

Look on the back of your computer and see the “Machine type model”
It’s something like “2255”

Then search the internet for that model type manual.

Reply 53 of 66, by BLockOUT

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Intel486dx33 wrote on 2021-08-25, 23:06:
See my posts above with the manual white pages. It shows the jumper settings for 486dx2. Use that jumper setting for 33mhz. CPU […]
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See my posts above with the manual white pages.
It shows the jumper settings for 486dx2.
Use that jumper setting for 33mhz. CPU
Or maybe it was the Pentium overdrive CPU setting.

You need to switch the jumpers for 286kb of cache too when used.

See photos above.

Update:
Actually, your motherboard is different from mine.
I don’t see your motherboard in the hardware manual.

Look on the back of your computer and see the “Machine type model”
It’s something like “2255”

Then search the internet for that model type manual.

interesting , in the manual you posted today that motherboard model from our pictures is not included in the manual designs.
but if you say that setting the board jumpers to overdrive...will also work with a dx2 66mhz and a transposer i might give it a try.

Reply 54 of 66, by BLockOUT

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Intel486dx33 wrote on 2021-08-25, 23:06:
See my posts above with the manual white pages. It shows the jumper settings for 486dx2. Use that jumper setting for 33mhz. CPU […]
Show full quote

See my posts above with the manual white pages.
It shows the jumper settings for 486dx2.
Use that jumper setting for 33mhz. CPU
Or maybe it was the Pentium overdrive CPU setting.

You need to switch the jumpers for 286kb of cache too when used.

See photos above.

Update:
Actually, your motherboard is different from mine.
I don’t see your motherboard in the hardware manual.

Look on the back of your computer and see the “Machine type model”
It’s something like “2255”

Then search the internet for that model type manual.

strange, it kind of looks the same as the picture you posted some time ago, did you take this photo?

file.php?id=67843&mode=view

Reply 55 of 66, by Intel486dx33

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Yes, it looks the same.
Then it should work.
For a 33mhz BUS CPU try the “Pentium OPD” jumper setting
I have the computer stored away in my garage or I would check.

In the photo above that is a standard intel 486dx-50 CPU
The jumper are set for that and NO Cache.

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Reply 56 of 66, by Intel486dx33

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Here I have it configured for 256kb cache and 33mhz system BUS using 168-pin Intel Overdrive 486dx4-100 CPU.
32mb RAM. ( This is NOT the 169=pin intel overdrive CPU with the extra pin in the center )

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Last edited by Intel486dx33 on 2021-08-26, 10:58. Edited 2 times in total.

Reply 57 of 66, by BLockOUT

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Intel486dx33 wrote on 2021-08-26, 00:29:

Here I have to configured for 256kb cache and 33mhz BUS using 168-pin Intel Overdrive 486dx4-100 CPU.
32mb RAM.

thanks, i have the same cpu as you, tomorrow i will open it and i just need to flip JP24 to 2-3 position.
does your pc with that cpu run at 100mhz? or 75mhz? do you know?

Reply 58 of 66, by Intel486dx33

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BLockOUT wrote on 2021-08-26, 06:27:
Intel486dx33 wrote on 2021-08-26, 00:29:

Here I have to configured for 256kb cache and 33mhz BUS using 168-pin Intel Overdrive 486dx4-100 CPU.
32mb RAM.

thanks, i have the same cpu as you, tomorrow i will open it and i just need to flip JP24 to 2-3 position.
does your pc with that cpu run at 100mhz? or 75mhz? do you know?

100mhz

See this chart for "SX33"

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Reply 59 of 66, by Intel486dx33

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BLockOUT wrote on 2021-08-25, 23:34:
Intel486dx33 wrote on 2021-08-25, 23:06:
See my posts above with the manual white pages. It shows the jumper settings for 486dx2. Use that jumper setting for 33mhz. CPU […]
Show full quote

See my posts above with the manual white pages.
It shows the jumper settings for 486dx2.
Use that jumper setting for 33mhz. CPU
Or maybe it was the Pentium overdrive CPU setting.

You need to switch the jumpers for 286kb of cache too when used.

See photos above.

Update:
Actually, your motherboard is different from mine.
I don’t see your motherboard in the hardware manual.

Look on the back of your computer and see the “Machine type model”
It’s something like “2255”

Then search the internet for that model type manual.

interesting , in the manual you posted today that motherboard model from our pictures is not included in the manual designs.
but if you say that setting the board jumpers to overdrive...will also work with a dx2 66mhz and a transposer i might give it a try.

I am going to try one of these in my other PS/1 with a 486sx-33. It has an Intel Overdrive socket but only excepts 169-pin CPU’s
So this adapter with a 486dx4-100 should work.

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