Int 7F/AH=B1h/SF=00h

AH = B1h subfn 00h
AL = (bits 7-5) 000
(bits 4-0) user ID

Note: MW386 ignores AL; it releases all semaphores locked using INT 67 or INT 7F locking functions

See Also: AH=B0h - AH=B2h - AH=B3h - AH=B4h

Category: Network - Int 7Fh - A