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