DOS
Description
A rudimentary operating system originally shipped with the IBM PC in 1981, primarily a CP/M clone with some facilities modified for a more "IBM like" behaviour or to conform to IBM naming conventions (config.sys etc.).
Version 1 was so buggy it was rewritten mostly from scratch by IBM for version 1.1, which is the reason all subsequent DOS releases from Microsoft contain an IBM copyright notice, the manual for DOS was also an internal IBM product and not written by either MicroSoft or .
Porting issues
Since we have a few given facts such as:
- OS/2 command line was developed with compatibility with DOS in mind
- OS/2 has support for all known DOS codepages
- OS/2 has a DOS subsystem that is a full version of DOS v5 built in
It is somewhat apparent that porting to and especially from DOS is as easy as it gets, if you cannot get the tools or the time to make a 32 bit version for OS/2, you can in a worst case scenario run the original program under the DOS subsystem.
Known versions
This lists major versions of DOS, minor versions such as 6.21 or 6.22 that are product specific upgrades or minor bug fix releases are not listed
- DOS Plus
- DR-DOS v5
- DR-DOS v8
- DR-DOS v8.1
- MS-DOS v1
- MS-DOS v1.1
- MS-DOS v2
- MS-DOS v3
- MS-DOS v3.3
- MS-DOS v4
- MS-DOS v5
- MS-DOS v6
- MS-DOS v6.2
- MS-DOS v7
- MS-DOS v8 (Current)
- OpenDOS v7.01
- PC-DOS v1
- PC-DOS v6
- PC-DOS v6.1
- PC-DOS v6.3
- PC-DOS v7
- PC-DOS 2000
- PC-DOS v7.1 (Current)
Authors
- Seattle Computer Products (Original Author)
- IBM
- Microsoft
- Digital Research et al.