Int 67 Fn 01  - PC-net, Alloy Ntnx - Lock Semaphore                        [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"PC-NET",INT 7F/AH=01h"Alloy"