DL drive: 00H thru 03H = diskette drive
Returns: AH 00H = not installed
01H = diskette drive: can't detect disk change
02H = diskette drive: CAN detect disk change
Info: This checks to see if a hard drive or diskette drive is
For diskette drives, this also finds if the drive is capable of
detecting change-line status (that is, will it be able to sense
when the drive door has been opened).
Notes: On diskette drives which detect change-line status, you can use
See Also: DOS fn 440dH 68H (IOCTL sense media type)