Int 7F Fn 10  - Alloy Ntnx, Mw386 - Channel Control - Lock Multiple Chann  [N]

   AH = 10h
   CL = 08h
   DX = maximum channel number to lock

Return: AL = status (00h-03h) (see #3622)

Notes: locks channels numbered 00h through the value in DX
   may not be invoked from within a hardware interrupt handler

See Also: AH=10h/CL=02h,AH=10h/CL=06h,AH=10h/CL=09h