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                       DOS BACKUP Control Information

      BACKUPID.@@@ Format

      Offset Size             Description
        00   byte   Disk sequence flag:
                        00  indicates disk is not the last backup diskette
                        FF  indicates disk is the last backup diskette
        01   word   Floppy disk sequence number (Intel format)
        03   word   Backup year, four digits (Intel format)
        05   byte   Day of month (1-31)
        06   byte   Month of year (1-12)
        07   dword  System time if /T was specified (see FILE ATTRIBUTES)
        0B 117bytes Unused


      Backup File Header

      Offset Size             Description
        00   byte   Disk sequence flag:
                        00  indicates disk is not the last backup diskette
                        FF  indicates disk is the last backup diskette
        01   byte   Floppy disk sequence number
        02  3bytes  Unused
        05 64bytes  Full pathname (without drive designator)
        45 14bytes  Unused
        53   byte   Length of file path name at offset 05 plus 1
        54 44Bytes  Unused