IBM OS/2 1.0 revision 7.68
| Build of OS/2 1.0 | |
 | |
| Architecture | x86 16-bit |
|---|---|
| Compiled on | 1986-10-22 |
IBM OS/2 1.0 revision 7.68 is an early build of OS/2 1.0 and is currently the earliest available build of OS/2. It is available as a boot disk. The operating system for this build is branded as "CP/DOS" and "ADOS 5.00".
Changes from Multitasking MS-DOS 4[edit | edit source]
- System calls were optimised to use Intel 80186
ENTER/EXITinstructions. - The system has been ported to use the protected mode of the Intel 80286 processor.
Bugs[edit | edit source]
This build requires an EGA or lower display adapter, otherwise the screen will blank after boot.
Slack space[edit | edit source]
While not very much remains, the slack space on this disk has references to an unknown version of Windows (with the directory entry strangely indicating a cluster number corresponding to a position on the disk far past the size of the disk image) installed on 30 October 1986 as well as several older versions of the linker.
Gallery[edit | edit source]
Boot screen
Session Manager
