213700 INT 21 - DOS 2+ - "SWITCHAR" - GET SWITCH CHARACTER
213701 INT 21 - DOS 2+ - "SWITCHAR" - SET SWITCH CHARACTER
2137 INT 21 - DOS 2.x and 3.3+ only - "AVAILDEV" - SPECIFY \DEV\ PREFIX USE
2137A0BX6A6D INT 21 - XPACK v1.52+ - TSR INSTALLATION CHECK
2137A1BX6A6D INT 21 - XPACK v1.52+ - UNINSTALL
2137A2BX6A6D INT 21 - XPACK v1.52+ - GET TSR STATUS
2137A3BX6A6D INT 21 - XPACK v1.52+ - SET TSR STATUS
2137A6BX6A6D INT 21 - XPACK v1.65 - GET TEMPORARY DIRECTORY NAME
2137A7BX6A6D INT 21 - XPACK v1.65 - SET TEMPORARY DIRECTORY NAME
2137D0BX899D INT 21 - DIET v1.43e - TSR INSTALLATION CHECK
2137D1BX899D INT 21 - DIET v1.43e - GET DIET.EXE RESIDENT SEGMENT
2137D2BX899D INT 21 - DIET v1.43e - GET TSR CONTROL FLAGS
2137D3BX899D INT 21 - DIET v1.43e - SET TSR CONTROL FLAGS
2137D4BX899D INT 21 - DIET v1.43e - GET TSR OPTIONS
2137D5BX899D INT 21 - DIET v1.43e - SET TSR OPTIONS
2137D6BX899D INT 21 - DIET v1.43e - GET TEMPORARY DIRECTORY NAMES
2137D7BX899D INT 21 - DIET v1.43e - SET TEMPORARY DIRECTORY NAMES
2137DCBX899D INT 21 - DIET v1.43e - SET ADDRESS OF EXTERNAL PROCEDURE
2137DDBX899D INT 21 - DIET v1.43e - RELEASE EXTERNAL PROCEDURE
2137DEBX899D INT 21 - DIET v1.43e - READ EMS STATUS
2137DFBX899D INT 21 - DIET v1.43e - UNINSTALL TSR