This port builds only the generic Z80 emulator and installs various
CP/M-80 disk images. The images can be copied into user directories
and updated from within the emulation of with the cpmtools programs.
The emulation covers CP-NET and MP/M-80 and addition to CP/M-1.4,
CP/M-2.2, and CP/M-3.0.
The port could be extended to install the full hardware emulation of
some classic S-100 bus computers from ALTAIR, IMSAI, and Cromemco
(including working emulation of the front panels).
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