IBM DOS for PS/1 R4.01

Category: OS
Year: 1990
Description:IBM DOS for PS/1
Manufacturer: IBM
Localization: EN

Files to download

#11183dos401ps1.zip650.7 KB0xF16F97D7

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On Sunday September 2, 2012 mastercontrol90 said:

hey guys! this works with ps/1 model 2011 (286 cpu) ?????

On Wednesday April 11, 2012 said:

I've restored the backup to the PS/1. It has Dos 4.00 and Windows 3.00. Also Programs called Systutor and Prodpack and Works 2.00 for Dos

On Monday March 19, 2012 said:

The PS/1 was the first PC that I bought. I learned a lot about computing from it.Like don't delete the DOS directory.
I read somewhere that only 5,000 units were made. As I'm in Ireland, it must be a pretty rare machine here.
I'll put the PS/1 into service and see whats on it. I think Works 2.? is

On Monday March 19, 2012 said:

Hi Rauli,
The PC was an IBM PS/1 TYPE 2121, a 386sx with 40 Mb disk and 2 Meg of ram.
Software loaded was IBM DOS 4.0 and Windows 3.0.
The file with the wina20.386 was, I think, the 1st backup disk from the PC that I made.
There were no disks other than a Disl labelled IBM DOS for PS/1, Version R4.01
I seem to recall that the only the IBMBIO.COM IBMDOS.COM were different. I dont have that PC loaded so can't check at the moment. I'll answer any questions as best i can

On Monday March 19, 2012 Rauli said:

Thanks, I downloaded and it boots and works. Just 2 questions:
1 - Why "4.01"? It says 4.00 and programs recognise it as 4.00.
2 - In 1st ZIP (with single files) there was a WINA20.386, but it is not in this ZIP (with disk image). Is it in your boot disk?
Anyway, thanks again (there are many people interested in DOS 4.xx versions :)

On Sunday March 18, 2012 said:

I downloaded the file image and made a new floppy which boots up