INT 13 - DISK - GET STATUS OF LAST OPERATION

	AH = 01h
	DL = drive (bit 7 set for hard disk)
Return: CF clear if successful (returned status 00h)
	CF set on error
	AH = status of previous operation (see #00234)
Note:	some BIOSes return the status in AL; the PS/2 Model 30/286 returns the
	  status in both AH and AL
SeeAlso: AH=00h,INT 4D/AH=01h,MEM 0040h:0041h,MEM 0040h:0074h