OS/2 was originally a joint effort between IBM and Microsoft. It grew out of efforts to create a Multitasking MS-DOS. It was intended to be the future OS for IBM's new PS/2 series. At release it competed against Microsoft's Windows GUI shell, but most users continued to use DOS. OS/2 1.x was used as the basis for Citrix Multiuser

1.x was heavily criticized for its poor backwards compatibility, heavier system requirements, design decisions made in order to support 286s instead of just 386s, poor hardware compatiblity, and lack of third party driver support. There was an inaccurate, but justifiable, common belief that OS/2 could only run on genuine IBM hardware.

Still, it was believed that all future software development would be for OS/2, until an almost overnight fallout between IBM and Microsoft shifted the spotlight to the yet to be developed Windows NT.

Without Microsoft's help, IBM massively re-wrote OS/2 to produce OS/2 2.x

Have something to share about OS/2 1.x? Tell us! Comments on any WinWorld articles are welcome over on WinBoards, WinWorld's discussion forum.



OS/2 1.0 is command-line only. It was designed to run on a 286 or later.

To install on a faster computer or VirtualBox, you must first apply the OS/2 speed patches described here to the boot disk: http://www.os2museum.com/wp/installing-os2-1-x-in-a-virtualbox-vm/

To summarize, replace all occurrences of: B8 F4 01 BB C8 00 F7 E3 F7 F1 with B8 F4 01 BB C8 00 F7 E3 90 90

You may also need to partition the disk in advance.


Stats/Requirements

Category: Operating System
Platform: OS2
Release: 1987
End of Life: Unknown
RAM: 1.5 MB
Disk Space: Unknown
Required CPU: 286
Type: Console (Text)

Screenshots

Downloads

Name Version Size Language Architecture Contents
IBM OS/2 1.00 Extended Edition (3.5-1.44mb)  1.00 Extended Edition 4.53 MB English x86 3.5" Floppy
IBM OS/2 1.00 Standard Edition (3.5-1.2mb)  1.00 Standard Edition 774.98 KB English x86 3.5" Floppy
IBM OS/2 1.00 Standard Edition (3.5-1.44mb)  1.00 Standard Edition 1.58 MB English x86 3.5" Floppy
IBM OS/2 1.00 Standard Edition Manual  1.00 Standard Edition 64.28 MB English x86 File Archive
IBM OS/2 1.00 Standard Edition [German] (3.5-1.44mb)  1.00 Standard Edition 599.85 KB German x86 3.5" Floppy
Microsoft OS/2 1.00 Standard Edition (3.5-1.44mb)  1.00 Standard Edition 698.22 KB English x86 3.5" Floppy
Microsoft OS/2 1.00 Standard Edition [Tandy OEM] (5.25-1.2mb)  1.00 Standard Edition [Tandy OEM] 686.51 KB English x86 3.5" Floppy
Microsoft OS2 SDK 1.02 (3.5-1.44mb)  SDK 1.02 (Microsoft) 2 MB English x86 3.5" Floppy