CP/M-86

CP/M-86 was a version of the CP/M operating system for the Intel 8086. The commands are those of CP/M-80. It was later reworked to become MS-DOS compatible and renamed to DR-DOS and is discussed at more length in that article.

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A given version of CP/M-86 will have two version numbers. One applies to the whole system and is usually displayed at startup; the other applies to the BDOS kernel. Versions known to exist include:

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• CP/M-86 for the IBM Personal Computer Version 1.0 (BDOS 2.2) - January 1982 - Initial release for the IBM PC.
• CP/M-86 for the IBM Personal Computer Version 1.1 (BDOS 2.2) - March 1983 - Hard drive support was added.
• Personal CP/M-86 Version 1.0 (BDOS 3.1) - November 1983 - Released for the Siemens PG685. Based on the multitasking Concurrent CP/M kernel, it could run up to four tasks at once.
• Personal CP/M-86 Version 3.1 (BDOS 3.3) - January 1985 - A version for the Apricot F-Series computers. This version gained the ability to use MS-DOS formatted disks.
• Personal CP/M-86 Version 2.0 (BDOS 4.1) - 1986 or later - Released for the Siemens PC16-20. This is the same BDOS used in DOS Plus.
• Personal CP/M-86 Version 2.11 (BDOS 4.1) - 1986 or later - Released for the Siemens PG685.

It is believed that the various Personal CP/M-86 versions were based on an unreleased product known as CP/M-86 Plus; all known Personal CP/M-86 versions contain this string.

CP/M-86: Versions ►



 

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