0:474h                   Last Fixed Disk Operation Status

 Length: 1 byte

    Holds the status of the last fixed disk operation.

                Value           Last Fixed Disk Operation
                 00h            No error
                 01h            Invalid command
                 02h            Address mark not found
                 03h            Attempt to write on write-protected disk
                 04h            Sector not found
                 05h            Reset failed
                 07h            Drive parameter activity failed
                 08h            DMA overrun
                 09h            Attempt to DMA across a 64K boundary
                 0Ah            Bad sector flag detected
                 0Bh            Bad cylinder found
                 0Dh            Invalid number sectors on format
                 0Eh            Control data address mark detected
                 0Fh            DMA arbitration level out of range
                 10h            ECC data error
                 11h            ECC corrected data error
                 20h            Controller failure
                 40h            Seek failure
                 80h            Time out
                 AAh            Drive not ready
                 BBh            Undefined error
                 CCh            Write fault
                 E0h            Status error
                 FFh            Sense operation failed

       Note:          Use INT 13h, Service 01h, to obtain this
                      information.