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Bitfields for CP/M type indicator

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Bit Description

7 - 4

CPU type
0000 = 8080
0001 = 8086

3 - 0

OS type
0000 = CP/M
0001 = MP/M
0002 = CP/Net
0004 = multiuser

Note:

Usually 10h (single-user) or 14h (multi-user).
While earlier releases of the system utilities performed a test for a version code of (>)= (10)xxh, this was changed with DR-OpenDOS 7.02+ (now taking a possible multi-user version into account): Most utilities now test for AH being either 10h or 14h, and a BDOS version >=xxh to allow them to properly run on possible future multi-user releases of DR-DOS. Before doing this test, some of them strip off the CP/Net bit.

See Also:

#01580