INT 21,44,8 / IOCTL,8 - Device Removable Query


	AH = 44h
	AL = 08
	BL = drive number (0=default, 1=A:, 2=B:, 3=C:, ...)


	on return
	CF = 0 if successful
	   = 1 if error
	AX = 00  removable media
	   = 01  non-removable media
	   = error code if CF set  (see DOS ERROR CODES)


	- used to determine if a device supports removable media
	- RAM disks are not considered removable media
	- device drivers compatible with DOS 2.0 do not always respond
	  correctly to this query
	- implemented from DOS 3.0;  for earlier DOS versions drive A: and
	  B: are removable media since DRIVER.SYS/SUBST are DOS 3.0+ only