Int 7F Fn 10  - Alloy Ntnx, Mw386 - Channel Control - Unlock Channel       [N]

   AH = 10h
   CL = 03h
   AL = channel number

Return: AL = status (00h-03h,0Ah) (see AH=10h/CL=00h)

Notes: should only be used on channels locked with AH=10h/CL=02h, not on those
     locked by receipt of a datagram
   may not be invoked from within a hardware interrupt handler

See Also: AH=10h/CL=02h,AH=10h/CL=04h,AH=10h/CL=09h