DOS_SERVICE                     EQU    021h
DOS_WRITE_CHARACTER             EQU    002h
DOS_GET_DEFAULT_DRIVE           EQU    019h
DOS_SET_DTA                     EQU    01Ah
DOS_GET_DTA                     EQU    02Fh
DOS_CREATE_FILE                 EQU    03Ch
DOS_OPEN_FILE                   EQU    03Dh
DOS_CLOSE_FILE                  EQU    03Eh
DOS_READ_FROM_HANDLE            EQU    03Fh
DOS_WRITE_TO_HANDLE             EQU    040h
DOS_MOVE_FILE_POINTER           EQU    042h
DOS_GET_CURRENT_DIRECTORY       EQU    047h
DOS_ALLOCATE_MEMORY             EQU    048h
DOS_FREE_ALLOCATED_MEMORY       EQU    049h
DOS_SET_MEMORY_BLOCK_SIZE       EQU    04Ah
DOS_TERMINATE_EXE               EQU    04Ch
DOS_FIND_FIRST_FILE             EQU    04Eh
DOS_FIND_NEXT_FILE              EQU    04Fh
DOS_GET_DEVICE_PARAMETERS       EQU  0440Dh
DOS_GET_MEDIA_ID                EQU  0440Dh
DOS_SENSE_MEDIA_TYPE            EQU  0440Dh
DOS_GET_ALLOCATION_STRATEGY     EQU  05800h
DOS_SET_ALLOCATION_STRATEGY     EQU  05801h

DOS_DEFAULT_DRIVE               EQU    000h
DOS_FILE_READ_ONLY              EQU    000h
DOS_FILE_WRITE_ONLY             EQU    001h
DOS_FILE_READ_WRITE             EQU    002h
DOS_MOVE_FILE_POINTER_BEGIN     EQU    000h
DOS_MOVE_FILE_POINTER_CURR      EQU    001h
DOS_MOVE_FILE_POINTER_END       EQU    002h
DOS_FIND_FILES                  EQU  00000h
DOS_FIND_DIRECTORIES            EQU  00010h
DOS_PATH_NOT_FOUND              EQU  00003h
DOS_DRIVE_NOT_READY             EQU  00005h
DOS_DRIVE_NOT_AVAILABLE         EQU  0000Fh
DOS_STRATEGY_MEM_FIRST_FIT      EQU  00000h
DOS_STRATEGY_MEM_LAST_FIT       EQU  00001h
DOS_STRATEGY_MEM_BEST_FIT       EQU  00002h
DOS_STRATEGY_MEM_CONV           EQU  00000h
DOS_STRATEGY_MEM_UMB_CONV       EQU  00040h
DOS_STRATEGY_MEM_UMB            EQU  00080h
DOS_GET_DEVICE_PARAMETERS_CX    EQU  00860h
DOS_GET_MEDIA_ID_CX             EQU  00866h
DOS_SENSE_MEDIA_TYPE_CX         EQU  00868h