CP/M

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CP/M (Control Program for Microcomputers) is an operating system from which MS-DOS was cloned. It was created by Digital Research, Inc. for Intel 8080 computers. The original proprietary version of CP/M from 1978 used up to 64K of RAM on an 8-bit processor. By version 3 (1983), it could work on a 16-bit processor with multi-user mode.

Timeline[edit]

CP/M Versions

Name Version Codename Notes
CP/M 80 1.0 1.0 Released in 1974
CP/M 86 1.0 1.0
CP/M 80 2.2 2.2 Released in 1982
CP/M 80 3.1 3.1 Released in 1983

MP/M Versions

Name Version Codename Notes
MP/M 80 1.0 1.0 Released in 1979
MP/M 80 1.1 1.1 Released in 1980-01
MP/M 80 2.0 2.0 Released in 1981-06
MP/M 80 2.1 2.1 Released in 1982-01
MP/M 86 1.0 1.0

Concurrent CP/M-DOS Versions

Name Version Codename Notes
Concurrent CP/M 80 1.0 1.0
Concurrent CP/M 86 1.0 1.0 Released in 1982
Concurrent CP/M 86 2.0 2.0 Released in 1983
Concurrent CP/M 86 3.0 3.0 Released in 1984
Concurrent DOS 3.2 3.2 Released in 1984
Concurrent DOS 4.0 4.0 Released in 1985