OS/2 1.x 1.0

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 compatibility, 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

Other OS/2 Versions:
| 1.x | 2.x | 3.x | 4.x | All |



Screenshots

Release notes

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

Additional Microsoft pre-releases were included in the Microsoft OS/2 SDK.

Installation instructions

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.

Product type
OS
Vendor
IBM / Microsoft
Release date
1987
Minimum CPU
286
Minimum RAM
1.5MB
User interface
Text
Platform
OS2
Download count
19 (10 for release)

Downloads

Download name Version Language Architecture File size Downloads
IBM OS/2 1.00 Extended Edition (3.5-1.44mb) 1.00 Extended Edition English 25.13MB 7
IBM OS/2 1.00 Standard Edition (3.5-1.2mb) 1.00 Standard Edition English 774.98KB 0
IBM OS/2 1.00 Standard Edition (3.5-1.44mb) 1.00 Standard Edition English 1.58MB 1
IBM OS/2 1.00 Standard Edition Manual 1.00 Standard Edition English 64.28MB 0
IBM OS/2 1.00 Standard Edition [German] (3.5-1.44mb) 1.00 Standard Edition German 599.85KB 0
Microsoft OS/2 1.00 Standard Edition (3.5-1.44mb) 1.00 Standard Edition English 698.22KB 2
Microsoft OS/2 1.00 Standard Edition [Tandy OEM] (5.25-1.2mb) 1.00 Standard Edition [Tandy OEM] English 686.51KB 0

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