CP/M 86 8680 2.x

CP/M-86 is a port of Digital Research's CP/M operating system to the Intel 8088/8086. The earlier CP/M-80 was extremely popular on 8080/Z80 microcomputers.

It was anticipated that CP/M-86 would be the de-facto operating system on IBM's 8088 based IBM Personal Computer. However after a failure between Digital Research and IBM to coordinate a license for the IBM Personal Computer's August 1981 release, IBM instead partnered with Microsoft to release PC-DOS. CP/M-86 for the IBM PC was released on April 1982, but by that time DOS already had a foothold.

CP/M-86 was ported to a number of non IBM compatible platforms that also used the x86 CPU. It later evolved in to DOS Plus and DR-DOS and branched in to Concurrent CP/M-86

CP/M is currently open sourced under the BSD license.

Release notes

CP/M-8680 is a hybrid version of CP/M for the Digital DEC Rainbow computer that can run software designed for both CP/M-80 and CP/M-86. This is possible because the DEC Rainbow includes an 8-bit Z80 co-processor in addition to its more powerful 16-bit Intel 8086.

The "2" version number corresponds with the CP/M-80 version.

Product type
Release date
User interface
Download count
13 (0 for release)


Download name Version Language Architecture File size Downloads
Digital Research CPM-8680 2.0 (1983) [DEC Rainbow] (5.25-SSQD) 2.0 English 29.21MB 0
Digital Research CPM-8680 2.0 [DEC Rainbow] (5.25-SSQD) (alt) 2.0 English 142.87KB 0
Digital Research CPM-8680 2.1 [DEC Rainbow] (5.25-SSQD) 2.1 English 158.52KB 0


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