Personal Computer Technical Reference
Software
  Operating Systems
    MS-DOS or PC-DOS
      Services Summary
	Process Management

Description					      Version	 Function
----------------------------------------------------- ---------- -----------
File Load or Execute (program file)                              Int\21f\4B
Terminate Program updates FAT, flushes buffers, restores registers       00
Create New Program Segment Prefix (PSP)                                  26
Terminate Process and Stay Resident                                      31
terminate prog and return to DOS                                 Int\21f\4C	
Move a File Read/Write Pointer                                           4D
get program segment prefix (PSP)                                 Int\21f\62