Compatibility: 3.3+
Expects: AX    440cH
BX    file handle  (device or disk file)
CL    4dH
CH    device category: 00H=unknown
01H=COMn (DOS 3.3+)
03H=console (screen + keyboard) (DOS 3.3+)
05H=parallel printer (DOS 3.2+)
                                                                  
Returns: AX    error code  if CF is set to CY
                                                                  
Info: Completes the sequence that prepares a device for preparing a
code page list.

See Fn 440cH 4cH (start cp prepare) and 4403H (send IOCTL data)
for related information.

See Also: Fn 44H (IOCTL)
Fn 440cH (generic IOCTL for character devices)
- -

DOS Fn 440cH CL=4DH: IOCTL End Code Page Prepare