Compatibility: 2.0+
Expects: AX    4402H
BX    file handle  (device only)
CX    buffer size (maximum number of bytes to receive)
DS:DX Address of buffer to receive data
                                                                  
Returns: AX    error code  if CF is set to CY
Number of bytes actually received (if no error)
                                                                  
Info: Some character device drivers support this method of providing
device-specific information to programs.  The layout and contents
of the returned data varies from device to device.

Notes:   This fn is supported only if bit 14 of the rDevAttr field of
the device driver's DevHdrRec structure is set.  Use Fn 4400H
to check this bit.

See Also: Fn 44H (IOCTL)
Fn 4403H (Send Control Data to Character Device)
Fn 4404H (Receive Control Data from Block Device)
- -

DOS Fn 4402H: IOCTL Receive Control Data from Char Device