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;Xpack's Errorlevel for DOS Batch Processing
;--
; Errorlevel (255) -1: user break (esc)
;                   0: ok
;                   1: Can't Open Input File
;                   2: Can not PacK: Overlay
;                   3: Can not PacK: Non-EXE
;                   4: display usage
;                   5: display help documentation
;                   6: File could not be compressed !!
;                   7: Can not PacK: New EXE
;                   8: disk full
;                   9: Can't Create tmpfile
;                  10: expand function (option/x) not support .exe files
;                  11: .COM File size exceeds 56,000 bytes
;       (reserved) 12: (n/a)
;                  13: file is already compressed
;                  14: file is not compressed
;                  15: .COM file size is 0 byte
;                  16: .COM file size < 512 bytes
;       (reserved) 17: (n/a)
;                  18: memory not enough
;       (reversed) 19: (n/a)
;                  20: Can not unpack non-xpacked archive!
;                  21: Can not unpack not supported filetype!
;                  22: Can not unpack to different diskette size!
;                  23: Data integrity error of .XDi file!
;                  24: Diskette Write Protect!
;                  25: Can't install Xpack OnLine DeCompression System

;Xpack OnLine DeCompression System Application Interface
;----------2137A0BX6A6D-----------------------
;INT 21 - XPACK v1.52 - TSR INSTALLATION CHECK
;	 AX = 37A0h
;        BX = 6A6Dh
;Return: AL = FFh if not present as TSR (default return value from DOS)
;	 AX = 0000h if installed as a TSR
;            CX = 6A6Dh
;            DX = version ID
;Program: XPACK is a transparent file compressor/decompressor by JauMing Tseng
;----------2137A1BX6A6D-----------------------
;INT 21 - XPACK v1.52 - UNLOAD TSR
;	 AX = 37A1h
;        BX = 6A6Dh
;Return: AX = status
;	     0000h successful
;	     FFFFh failed
;Program: XPACK is a transparent file compressor/decompressor by JauMing Tseng
;Index:  uninstall;XPACK
;----------2137A2BX6A6D-----------------------
;INT 21 - XPACK v1.52 - GET TSR STATUS
;	 AX = 37A2h
;        BX = 6A6Dh
;Return: AX = 0000h
;	 DL = status (01h active, 00h disabled)
;----------2137A3BX6A6D-----------------------
;INT 21 - XPACK v1.52 - SET TSR STATUS
;	 AX = 37A3h
;        BX = 6A6Dh
;	 DL = status (01h active, 00h disabled)
;Return: AX = 0000h
;----------2137A4BX6A6D-----------------------
;INT 21 - XPACK v1.65 - COMPRESS A MEMORY BLOCK
;        AX = 37A4h
;        BX = 6A6Dh
;        CX = size of input data
;        DS:SI -> pointer to source block
;        ES:DI -> pointer to target block
;Return: CX = compressed size
;Note: ­ Make sure the target block is always larger than the source block !!
; 'coz if input data is uncompressable, the resulting size will be expanded !
;SeeAlso: AX=37A5h
;----------2137A5BX6A6D-----------------------
;INT 21 - XPACK v1.65 - UNCOMPRESS A MEMORY BLOCK
;        AX = 37A5h
;        BX = 6A6Dh
;        DS:SI -> pointer to source block
;        ES:DI -> pointer to target block
;Return: AX = original size
;        CX = expanded size
;SeeAlso: AX=37A4h
;----------2137A6BX6A6D-----------------------
;INT 21 - XPACK v1.65 - GET TEMPORARY DIRECTORY NAME
;        AX = 37A6h
;        BX = 6A6Dh
;Return: AX = 0000h
;        DS:DX -> name of temporary directory
;SeeAlso: AX=37A7h
;----------2137A7BX6A6D-----------------------
;INT 21 - XPACK v1.65 - SET TEMPORARY DIRECTORY NAME
;        AX = 37A7h
;        BX = 6A6Dh
;        DS:DX -> ASCIZ name of temporary directory (max 64 chars)
;Return: AX = 0000h
;Note:   the specified directory name must include a drive letter and end with
;          a backslash (e.g. 'c:\dos\',0)
;SeeAlso: AX=37A6h


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