Int 7F Fn 10 - Alloy Ntnx, Mw386 - Channel Control - Lock Channel [N] AH = 10h CL = 02h AL = channel number Return: AL = status (00h-03h,0Ah,0Ch) (see AH=10h/CL=00h) Note: may not be invoked from within a hardware interrupt handler See Also: AH=10h/CL=03h,AH=10h/CL=06h,AH=10h/CL=08h