I IBM Personal Computers
C. Disk Operating System
3. Function Call
call group description
00h program terminate
01h-0Ch character device I/O, CP/M compatibility format
0Dh-24h file management, CP/M compatibility format
25h-26h nondevice functions, CP/M compatibility format
27h-29h file management, CP/M compatibility format
2Ah-2Eh nondevice functions, CP/M compatibility format
2Fh-38h extended functions
39h-3Bh directory group
3Ch-46h extended file management
47h directory group
48h-4Bh extended memory management
54h-57h extended functions
60h-62h extended functions
63h-66h enhanced foreign language support
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