Compatibility: 5.0+
Expects: AX    440dH
BX    drive (0=default, 1=A, 2=B, etc.)
CL    68H
CH    08H (device category: block device)
DS:DX addr of a 16-bit word to receive the current media type
                                                                  
Returns: AX    error code  if CF is set to CY
DS:DX buffer contains two 8-bit values identifying the media type
in the specified drive
DS:[DX+0]  01H=it is the default media type
00H=it is NOT the default media type
DS:[DX+1]  02H=720K media is in the drive
07H=1.44 MB media
09H=2.88 MB media
                                                                  
Info: Obtains information on what type of media is currently in the
specified drive.

This function is not supported by all device drivers for all
media types.

See Also: Fn 44H (IOCTL)
Fn 440dH (generic IOCTL for block devices)
Fn 440dH 66H (query media ID)
- -

DOS Fn 440dH CL=68H: IOCTL Sense Media Type