Depending on the model IBM Dos 5.02, 6.1 or IBM Dos 6.3. MS Windows 3.1 or 3.11(not Windows for Wprkgroups.). OS/2 2.0 and OS/2.1.i was also an option for some models.

Info at this site- ttps://web.archive.org/web/20110930123108/http://www.lenovo.com/psref/pdf/vpbook.pdf

You can download the pdf file.

I wouldn't be surprised if Lenovo has the maintenance manual available in pdf format as well.

This might be useful- https://books.google.co.nz/books?id=EaHN5MSNN … monitor&f=false

Novell Networks was the LAN king back then.

I liked the look of IBM ValuePoint range because they never had that pesky, flimsy flap in in the front. The PS/1s were produced in parallel to ValuePoints from late 1992 to mid 1995. I wouldn't be surprised if later unsold ValuePoints had an offer to get Windows 95 upgrade like a lot of other OEMs did at the time.

Caluser2000 wrote on 2021-01-22, 17:04:

Depending on the model IBM Dos 5.02, 6.1 or IBM Dos 6.3. MS Windows 3.1 or 3.11(not Windows for Wprkgroups.). OS/2 2.0 and OS […]
Show full quote

Depending on the model IBM Dos 5.02, 6.1 or IBM Dos 6.3. MS Windows 3.1 or 3.11(not Windows for Wprkgroups.). OS/2 2.0 and OS/2.1.i was also an option for some models.

Info at this site- ttps://web.archive.org/web/20110930123108/http://www.lenovo.com/psref/pdf/vpbook.pdf

You can download the pdf file.

I wouldn't be surprised if Lenovo has the maintenance manual available in pdf format as well.

This might be useful- https://books.google.co.nz/books?id=EaHN5MSNN … monitor&f=false

Novell Networks was the LAN king back then.

I liked the look of IBM ValuePoint range because they never had that pesky, flimsy flap in in the front. The PS/1s were produced in parallel to ValuePoints from late 1992 to mid 1995. I wouldn't be surprised if later unsold ValuePoints had an offer to get Windows 95 upgrade like a lot of other OEMs did at the time.

Thanks for the info.

They're incredibly similar inside. If I didn't know, I'd swear I was looking at a PS/1.

I kind of went with a different route since I was impatient - I installed the bog standard DOS 6.22 but with PS/1 software on top. Considering the BIOS is identical as well I'm not surprised to see it all work fine. It's a fine PC and I also like the lack of a flap. It used to be a huge pain in the ass - each time I wanted to replace a CD, I had to pull back the keyboard so the flap could open. Only thing I don't like, is only one IDE port and a max of 470MB hard drive which is next to nothing for a 486 on a FAT16 system. I'll be forced to install a CD drive just for having easy access to more games.

Add a network card then Network it for easy access to newer kit and software transfer.

Caluser2000 wrote on 2021-01-22, 21:40:

Add a network card then Network it for easy access to newer kit and software transfer.

I do that on my "main" games rig but I wanted to keep this one as simple and as light as possible - once my CF adapter arrives I can just mount it in a bracket so I can access it from the back which to me is a lot easier than using network since I like to make dumps now and then + I it's a LOT faster.

I fully "completed" the PC yesterday - it now has a Mitsumi CD drive which originally came with my IBM Aptiva - cleaned it out, greased it and it runs beautifully again. It runs Doom but considering it's a 486SX 25 that's about the "heaviest" game I intend to run on this machine. I also replaced the crappy on-board PC speaker with a separate one out of a later IBM Aptiva (tower) which sounds MUCH better and crisper. Monkey Island sounds so much better with it. I'm glad IBM didn't skimp too much on the hardware and added a few extra ports at least.

I'd imagine you could upgrade the cpu to a 486DX2/66 if you wanted. I 've bought a number of systems that shipped new with a 486SX25 cpu. All of those cpus were upgraded with a 486DX2/50 or 486DX2/66 😉

Caluser2000 wrote on 2021-01-23, 09:30:

I'd imagine you could upgrade the cpu to a 486DX2/66 if you wanted. I 've bought a number of systems that shipped new with a 486SX25 cpu. All of those cpus were upgraded with a 486DX2/50 or 486DX2/66 😉

IBM PCs are weird - they require a special Overdrive upgrade CPU I believe with an extra pin. I Actually bought a 486DX2 66 Overdrive CPU for another IBM and it didn't work for this very reason. Finding one with the extra pin is proving to be more difficult.

But I have a Pentium 75 that I use for all later DOS games that is up to the task. That one also has VESA, the Valuepoint one is very close to my first PS/1 - it just has VGA so I'll stick to 1993 and older games with this one.

Look here:
https://ps1stuff.wordpress.com/download/downl … -for-type-2133/

I use the 1994 image on my PS/1 consultant 1993 computer.

It comes with DOS 5.0 and Win 3.1
And IBM menu system and utilities.
Works well with Sound Blaster 16 with OPL3 like a CT2950 , CT1600
Originally these came with a Panasonic CDROM and Sound Blaster CT2950.
So the divers and config files are all setup in the image but you can change as you like.
What I like about this image is the IBM menu and DOS utilities and batch files for preforming tastk. Which I think
Is what set IBM apart from all the other PC manufactures. There Menu and DOS utilities made it easy to perform
Backups and system restores.
You can edit the batch files to fit your needs.
But they are nice to have.

1) Download the Disk Image on your Win-10 PC
2) Extract in a folder
3) Burn files to a CDR disk.
4) Put in your 486 computer.
5) Boot off a DOS 5.0 boot disks which you can get from Allbootdisks.com
6) Format and Sys the harddrive in the 486
7) Use xcopy to copy the files from CD to the hard drive
# A:\xcopy /s/e D:*.* C:\

Intel486dx33 wrote on 2021-01-23, 17:57:

Look here: https://ps1stuff.wordpress.com/download/downl … -for-type-2133/ […]
Show full quote

Look here:
https://ps1stuff.wordpress.com/download/downl … -for-type-2133/

I use the 1994 image on my PS/1 consultant 1993 computer.

It comes with DOS 5.0 and Win 3.1
And IBM menu system and utilities.
Works well with Sound Blaster 16 with OPL3 like a CT2950 , CT1600
Originally these came with a Panasonic CDROM and Sound Blaster CT2950.
So the divers and config files are all setup in the image but you can change as you like.
What I like about this image is the IBM menu and DOS utilities and batch files for preforming tastk. Which I think
Is what set IBM apart from all the other PC manufactures. There Menu and DOS utilities made it easy to perform
Backups and system restores.
You can edit the batch files to fit your needs.
But they are nice to have.

1) Download the Disk Image on your Win-10 PC
2) Extract in a folder
3) Burn files to a CDR disk.
4) Put in your 486 computer.
5) Boot off a DOS 5.0 boot disks which you can get from Allbootdisks.com
6) Format and Sys the harddrive in the 486
7) Use xcopy to copy the files from CD to the hard drive
# A:\xcopy /s/e D:*.* C:\

Thanks - I currently have something similar installed. I installed the CT2940 (with OPL3 chip - lovely card) which is sadly not compatible - it's a Vibra SB16 so needs CTCM instead of the regular drives. The upside is it uses no memory, the downside is that it's not compatible with the default drivers IBM installed for Windows. Not a huge deal since this PC is VGA only so I won't be using Windows much if at all.

It's a lovely little machine though - I threw 40 of my favorite games at it and they all work flawlessly. It will make for a fine early 90's gaming PC without a lot of frills.