INT 7F - Alloy NTNX, MW386 - RELEASE SEMAPHORE
        AH = 02h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see AH=00h"NTNX")
        AH = semaphore owner if status=02h
SeeAlso: AH=00h,AH=01h,AH=42h

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