Int 7F Fn 01 - Alloy Ntnx, Mw386 - Semaphore Lock [N] AH = 01h DS:DX -> ASCIZ semaphore name (max 64 bytes) Return: AL = status (see AH=00h) AH = semaphore owner if status=02h See Also: AH=00h,AH=02h,AH=41h