Microsoft OS/2 1.0

Microsoft OS/2 1.0 is a version of OS/2 1.0 made by Microsoft. This version is command-line only. It was designed to run on a 286 or later. There are two known versions of this build, with one IBM PS/2 variant that only supports IBM PS/2 model 50 and 60 devices.

Installing on newer processors
This version up to 1.30.1 has a bug in the keyboard driver that causes setup to crash loading with TRAP 0000 due a division by zero when installing on any processor faster than a 486 processor. To install on a faster processor, the  files must be patched to remove the sequence that causes the division by zero.