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I > IBM  > PS/1


This mini forum is intended to provide a simple means of discussion about the IBM  PS/1 computer. If you want to share your own experience or memories, or add relevant information about this system: post a message!

  Click Here to add a message in the forum


Monday 27th March 2017

My IBM PS/1 came with 8MB of ram using 30 pin simms, it also came with OS/2 2.0 where I could launch Windows 3.1 inside of it for some extreme slow fun. I want to say the price was closer to 2k near the end of 93.

Eventually upgraded the 483dx 33 to a amd/cyrix processor, upgraded the motherboard and the ram to 20MB 72pin, added a 28.8 and lots of other stuff before tossing it out

Sunday 10th April 2016
Rose (USA)

I see that the price section below is blank. My first and second computers were both IBM PS1. I recall paying about $1100-$1200 for the first one circa 1988. the second one was less expensive as the technology was no longer cutting edge. I had to start it in DOS prompt and hated when window first came out because it seemed so different.

Tuesday 22nd March 2016

I had two of these systems. I do not remember the models but I remember the hardware. The first one I bought from a friend for 50 bucks. It had a 486SX at 25MHz, 4MB of ram, 1.44MB floppy and a 1.2MB floppy. It also had a 1200 baud internal modem and had a beeper speaker. A few months later a random person in the neighborhood knew I was into computers and gave me their old PS$1 that was a 386. No memory, had both floppies and once again a 1200 baud modem. Later down the road I fixed them up by adding memory, CD-ROM drives and added sound cards. The 486 received a multimedia/modem card that was pulled some a Packardbell. It was basically a soundblaster with a 14.4K dial-up modem. The 386 got a Diamond monster card with a ESS sound chip. I used the systems to play games with friends via null modem. Played mostly the DOOM series. I don''t remember the hard drive sizes. I know they were the original ones but the 486 model got a new drive and I tossed the old one as a slave into the 386.

Sunday 5th January 2014

I have a fully functioning PS/1 with 3 1/4 and 5 1/2 inch drives and a hard disk as well. Came with Windows 3.1. I currently run MuLinux on it with no issues. 386 is 16mhz and it has 4mb of ram.

Tuesday 3rd September 2013
Carol (USA)

I have an old IMB ps/1 that I have had in my basement for years. I wanted to take the memory out of it before recycling it but can''t find where it''s located. Can anyone help? How do you remove the memory? (I lost the power cords so I can''t turn it on.) Thanks!

Monday 14th January 2013
nick Mandalaywala (United States)

buy printer ribbons
for my IBM PS-1 Printer. I have tried all over with no luck

can any one help

Wednesday 9th January 2013

The PS/1$I have the 486sx version that I purchased in ''93$is a great old computer. My first IBM, my first real computer after a succession of 8 bit machines, the first one I could do real work on. Built like a tank, and still works today (well, the floppy is dead and the monitor is close to it). I still love it and will never get rid of it. :-)

Saturday 13rd October 2012

The IBM PS/1 was my first pc purchased in ''93 with monitor from Sears. I soon went out a bought a pair of Creative Labs Soundblaster speakers which had the mosiac games with it. I believe the monitor was 13-inch, 25mhz? 486 SX processor, 250mb hard drive, and 1.44 floppy disk. Processor was not upgradable. It came with a Dune game, Prodigy, Aol, and Compuserve.

Wednesday 10th October 2012
Carol Schlim

I have the complete setup purchased in 1991: PS/1 computer, printer and all instruction manuals. The computer has 2.5 megabytes of memory. I would like to sell this.

Wednesday 10th October 2012
Carol Schlim

I have the complete setup purchased in 1991: PS/1 computer, printer and all instruction manuals. The computer has 2.5 megabytes of memory. I would like to sell this.

Thursday 5th April 2012
hazael (chih mexico)

I have an IBM 2133-G53 ps1 consultant
I want to sell but not its price
anyone can tell me how much it costs
my email is hazael.delgado @


Thursday 5th April 2012

I have a PS/1 TYPE 2121. I bought it in 1993.

It had a 386SX chip, 2MB of RAM and a 40MB Hard Drive.

It has IBM DOS 4.00 and Windows 3.00 installed. Works 2.0 was also included.

I upgraded it with the Adaptor Unit with 3 ISA slots. I also upgraded to a 486SX chip and added 4MB of memory.

I have just installed a 125 MB drive. I also added a 5.25" floppy drive unit (brand new)

Friday 6th January 2012
Carlos (Niteroi, RJ, Brasil)

I do have one PS/1, just behind me.
It was bougth at Sears, back in 1991, for my daugther.
Cost was US$2.000 !!
Did not turn it on for a while, though.
But I will give it a try.

Saturday 5th November 2011


That computer is beyond repair. It''s a piece of history though. Send it to my home computer museum. :P

(Jk sounds like it just needs a little TLC, and a new CMOS battery. Not hard to do. :P )

Thursday 6th October 2011
William (Ohio)

Does it hold true that if you put a processor in the "Co-processor" socket, it disables the onboard one? I am absolutely certain my friend put a 486 DX2-66 in the socket, and it showed up in W95 and the BIOS as a 486 DX2-66 CPU installed, instead of the original 486 SX-25.

Thursday 1st September 2011
Jim Norton (Crescent City, California)

That spare "CPU socket" on the motherboard is actually for a math co-processor... something that was built into the -DX versions of the CPU''s. Like a graphics card offloads the graphics duties from the CPU, the math co-processor offloaded the floating point calculations and other intensive math functions from the CPU, resulting in improved performance. The socket was disabled when used with a -DX processor.
I never actually saw one with the co-processor installed... if you bought an SX unit, you were interested in shaving costs or knew very little about the differences between the SX and DX versions... either way, the amount of increase performance versus the price (and lack of availability) of the co-processor tended to discourage their proliferation.
Well... this has been a bit of trivia that I never thought I''d use again... :-)

Thursday 25th August 2011
Margie (MI, USA)

I''m interested in selling my IBM PS1 computer. I bought it on 8/15/93 from Best Buy. I used AOL for e-mailing up until the internet grew (or like in ''98)$ $ then I tried to $ some stuff in order to use the internet more efficiently. So, some programs are not working right $ I am not that computer literate. The Travel Planner says the working directory is invalid$that''s in the expert software$ The Desk jet (tool box) says "File error" cannot find HPG MON11.DLL$the print manager$"The queue processor for port LPT1 could not be loaded-(I had purchased a Panasonic colored, Impact Dot Matrix printer (KX-P2123) at the same time$ The ribbons last "forever"$-$ I have extra!! Anyway, I think this problem is in not having it in the right port?$or it''s just with the queue (if I''m remembering right).

I was playing music on the Keyboard about 4 months ago, but when I tried it recently, it said C:$SB$DRV$organ.drv is not a valid sound file. (Sounds like I don''t know how to load the driver??)
One last thing: When I turn it on it says (161 Bad CMOS Battery). I don''t know what all this means, but maybe someone out there who loves the IBM PS1$$like I did, will know how to fix these problems.
If anyone is interested, let me know...

Monday 13rd December 2010
Chris Miller (Houston/TX)

I''ve still got my PS/1 Model 2155. It''s been upgraded to a 486DX/2 66, 28MB RAM, and a 6GB hard drive. I still fire it up on occasion to play my old DOS games.

Wednesday 8th December 2010

I HAD an IBM PS/1 with a 44x CD-ROM drive 10 GB HDD
HD (1.44 MB) FDD and windows 95 on it
UNTIL I ACCIDTENDLY fried the built-in grafics card then i threw it away I didn''t throw away monitor though

Monday 8th November 2010

I had the 386sx one, a really happy little computer. Someone gave me it in the late 1990''s. I was able to make it into a "Dos peer server" and I was able to see it in a windows network up to Windows 2000 server when Microsoft still supported legacy dos systems. The integrated monitor went on the unit, and I actually gave it to someone else would wanted to try and repair it. A good machine. I remember that it also had a "loud" speaker in it.

Sunday 24th October 2010
caitlin lopez

I never hear about PS/1 I know about the PS/2 (which makes now sense why the $2)

Friday 22nd October 2010
Exin (Germany)

Oh, i forgot: The ISA slots on the 486SX model had a 3rd 8-Bit slot. I only used it for the Soundcard. (A 8-bit SB 2.1 Clone)

Friday 22nd October 2010
Exin (Germany)

I frequently used my PS/1 until my mom threw it away for no reason. I used to have the small version. (486SX)

I tried alot of things with this machine, and i always ended up with having not enough. It had only 2 ISA slots, instead of the stated 4. It didnt like 2 big (more than 512MB) harddisks on the same controller, so if i wanted to connect 2, i had to use a CDROM controller.

I used Windows 98SE on it, but the installation took hours.

The max Memory i could ever achieve was 48MB (2x16MB + 2x8MB). I had it full with 32MB Modules, but without effect.
Alo, it didnt like EDO modules alot. (Edo wasnt invented when this came out.) It just didnt recognize the modules. (as well as ALOT of other, i never have seen a machine that was SO GODDAMN picky about "PS/2" memory modules.)

The onboard graphics only allowed 640x480@256colors or 800x600@16 colors. So, if i wanted to have more, i''d sacrifice the only slot left. If i wanted to use the network(which i did alot), i had to stick with shitty graphics.

As CPU, i used a 486DX2 66. The machine didnt start with anything else. I had one adapter for DX4 CPU''s, but it didnt work, neither did AMD''s CPU''s.

What good was, the PS/2 Mouse and Keyboard. Also the nice Compact Case Design. ("Reinvented" as HTPC''s Today.)
Alot people were impressed with the Front plate, that could be opened to reveal the drives when needed.

But fitting the harddisks was too much for the system. It was a pain in the ass to fit tthe first drive alone. It had to be mounted under the CD drive and the second one was covered in a sheet of paper next to the ISA cards above the memory. (Which was luckily in "angeled" slots.)

I think it was somehow possible to upgrade the onboard video memory...but have 800x600 in 256 colors?....

I would really like to have one of those again. Too bad they are fucking rare nowadays.

Tuesday 4th May 2010

Can you help me, please? I habe a PS/1 (Type 2011) without Monitor. So i have a problem with the power-supply. i need the pinout from the power-connector on the backside from the PS/1. it is a Sub-D, like a gameport.
Can you help me$ thanks so much.
Greets from SATSCHY

Monday 19th April 2010
Ed Bratt (Canada)

My brother is in the process of moving, and has a ps/1-2011 which he left with me. It is complete with mouse, printer, and original books. He told me I should find a buyer. Unfortunately I am in Saskatchewan, Canada, and it is a long way from Switzerland, (and most other places).

Thursday 25th March 2010
frood (USA)

i have a p2/1 with windows 3.1 over ms-dos 6.2
it works like a charm, for now.
it''s funny, when i got it, it was shrouded in coincidence,
i had just got a manual for dos 6.2 and i was just expecting to take it apart and get out the 5.5'''' drive, but the thing came on perfectly, and so i kept it like it is. it has one of the earliest instances of the OEM putting lotsa useless stuff on your drive, as is so common now (it came with a lot of disney games that , as far as i can tell, were installed by the OEM).
it is a great computer.

Thursday 18th March 2010
docpc (switzerland)

I''m desperately seeking for a ps/1-2011 in order to transfer some very important information that I have on my old PS/1. Can somebody help me or do somebody know where I can buy one?

Thursday 31st December 2009
EPA (Germany)

Hello from Freiburg, Germany!

I am actually using two PS/1: 2011 and 2121.
Both have the nice IBM 4quad screen, but both were not fully preloaded.

On US machines of PS/1 there was IBM Promenade service preloaded (4quad screen under INFORMATION) from 1990 till 1994.

Does anybody has the Promenade service program on a floppy disk or on harddisk?

Thanks and nice to read your experiences here!


Tuesday 9th December 2008
Leland (USA)

I had the 486sx model with 4MB ram.

Its a LPX form factor (layout). Everything was built into the motherboard and had a four expansion slots of 16bit ISA but on a riser card. The memory was 72pin simms.

The CPU was integrated onto the motherboard but there was a socket3 that was empty. From what I was told you could put in another 486 CPU and the system disables the built-in CPU.

Later a friend gave me another PS$1 that had the 386sx. It used 72pin simms and had 8MB of ram. Pretty much the same thing as the later 486 but no way to expand the CPU.

The software was Windows 3.1 and MS-DOS 6.2 on both systems. There was a bootloader from IBM that let you $ ether to boot into DOS or Windows.

Monday 10th November 2008
Ian Robertson (UK)

Hiya I used to have one of these computers. I had the PS/1 2121 and it has designed as a cheap PS/2 for home use for basic office use. It ran MS-DOS 4.1 and Windows 3.0. It had DOS built into the ROM and was very strange in that respect. It booted up to a nice GUI called romshell. It was actually a lot easier to use than most PCs at the time as it was entirely possible to use it without using the command prompt and also without using windows.

Mine was a 386 SX20 with 2MB RAM and it was very slow even by the time we bought it new in 1993.

Monday 27th October 2008

it''s the first serious product to the home market since the failure of the ibm pc jr.

Saturday 16th August 2008

It was my 1st love , my 1st computer. It had also windows 3.0 , 2mb ram , 286, speed don't know as I didn't know about computers by then, the hard drive was built in had 40megas i think from calculation i remember i had once about 29mb free with windows on it just so 40 i think again, don't know what more to say.

I wish there was a emulator dedicated to this machine with it's 4 windows when starts.

Saturday 2nd August 2008
Chris Anderson

You could also get windows 3.1 on this PC as well and DOS 6.2

Wednesday 21st May 2008
Tiago Cardoso Pinto (Portugal)

I had contact with the IBM PS/1 Computer System in late 1990, when it first arrived in Portugal. The grand IBM campaign to sell it here named it as the easiest computer to work with, due to it's OS, the PC-DOS (originally).
In later versions, we can find MS-DOS, OS/2 and OS/2 WARP on the IBM PS/1. Also, in later 386 and 486 processor versions, Windows was pre-installed onto the computer.
A great machine for the time. It came (originally) with a 40MB HD, and the last model I found on sale carried a 500MB HD unit.

Friday 25th April 2008
Gita (USA)

I have a question, how much did the IBM PS/1 cost in 1990?


Saturday 22nd March 2008
Dave (Earth)

In response to Micheal McGeary, I wanted to comment that my PS/1 Consultant came with a bog standard 2x tray-loading CD-ROM that connected to a SB16 ISA card. Both came with the machine; it was the multimedia version.

170MH HD, 3.5", 2x CD-ROM, SB16, 2400 BPS modem on ISA, integrated 1MB 2D accelerator, 14" CRT, model M2 keyboard, 486SX/25 CPU.

Saturday 22nd March 2008
Dave (Earth)

I've owned several. I had the base model of the earlier revision. It had a 286-10 CPU, 512k RAM, dual 3.5 drives, a 12" mono VGA display, and a 2400BPS internal (might be an IBM upgrade?) modem. The best early models came with a 120 megabyte fixed disk, color 12" VGA, 4 megabytes ram, 386SX 25, bundled Windows 3.11, and a similar modem. All the early units kept the PSU and speaker in the monitor. The later Consultants, as pictured on this page, were very generic and felt like whitebox clones. They had standard ISA slots and monitors, unlike the earlier revision, which used a unique and very proprietary modular system for the RAM and modem. No PS/1 of these systems used MCA slots; IBM reserved those for their PS/2 systems.

If anyone is curious, I used the 286/10 in the late 1990s as a shellnet dialin terminal. It was a cheap way to get on the Internet outside of the den. It wasn't bad, as like seemingly all PS/1s, it came with a Model M2 buckling spring keyboard.

Saturday 8th March 2008
Arthur Bielski (Earth)

This was the first model that used the IBM proprietary microchannel bus architecture. It's failure was a direct result of not being able to accept 3rd part standard ISA cards.

Wednesday 12th December 2007
Michael McGeary (USA)

I recently recycled a PS/1. It had a 129MB hard drive,4MB of SIMM memory, and a CD-ROM drive that is not slot or tray loading. It has a spring mechinisim that discs keep getting stuck in. THere are no jumpers on it.

Thursday 8th November 2007
Mark Christoph (Apache Junction, AZ)

I bought my PS/1 in 1992, while working as an employee at the IBM East Fishkill facility. We made the memory chips that went into this computer, so part of my work is in it. I absolutely loved my PS/1 - it was reliable and an easy system to use. Mine came with a 25Mhz clock, 1Mb RAM (I later added another 1Mb) and a 129Mb hard drive, plus a 3 1/2" drive and a 5" drive. It was loaded with Windows 3.1.1 and DOS 5.0, and had a 1200 baud modem (which I later replaced with a 2400 and then a 9600 baud modem). I used it in the very early days before the Web existed, and the only online communities were Prodigy and Delphi, which I still have loaded on the system. It used a vanilla VGA monitor. My system still works fine and was a good product. I also purchased a 24 pin dot matrix printer with it, and the total package at that time was about $1000.

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