IBM OS/2 1.0

IBM OS/2 1.0 is the official RTM build of IBM OS/2 1.0. It only installs a command prompt interface, alongside an introduction program and a new shell called Program Selector.

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

Processor reset
The setup in this version also utilizes a processor reset sequence to change from protected mode to real mode. As a result, most hypervisors such as VirtualBox will crash when the processor resets due to a triple fault. It is necessary to enable resetting on triple fault on hypervisors that support it to allow setup to load.