MEM 0040h:0041h - DISKETTE - LAST OPERATION STATUS Size: BYTE SeeAlso: MEM 0040h:003Eh,MEM 0040h:0042h,INT 13/AH=01h Bitfields for diskette last operation status: Bit(s) Description (Table M0014) 7 drive not ready 6 seek error 5 general controller failure 4-0 error reason 00h no error 01h invalid request/parameter 02h address mark not found 03h write-protect error 04h sector not found 06h diskette change line active 08h DMAsee Direct Memory Access overrun 09h DMAsee Direct Memory Access across 64k boundary 0Ch media type unknown 10h CRC error on read Note: the following values for this byte differ somewhat from the bitfield definition above: 30h drive does not support media sense 31h no media in drive 32h drive does not support media type AAh diskette drive not ready