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Concurrent DOS XM

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Digital Research Concurrent DOS XM can run multiple CP/M-86 and DOS programs concurrently and supports up to three users.

Versions

IBM PC DOS 2.10 emulation

  • Oct 1986: Concurrent DOS XM 5.0 (BDOS 5.0)
  • Jan 1987: Concurrent DOS XM 5.1
  • Sep 1987: Concurrent DOS XM 5.2

IBM PC DOS 3.30 emulation

  • Dec 1987: Concurrent DOS XM 6.0 (BDOS 6.0)
  • May 1988: Concurrent DOS XM 6.01
  • Dec 1988: Concurrent DOS XM 6.2 (BDOS 6.2)
  • Concurrent DOS XM 6.21