Int 15 Fn 10 - Multidos Plus - Test Resource Semaphore [T] AH = 10h AL = semaphore number (00h-3Fh) Return: AH = status 00h semaphore not in use 01h semaphore owned by another task 02h invalid semaphore number 03h semaphore owned by caller See Also: AH=02h"MultiDOS",AH=0Dh"MultiDOS",AH=1Dh"MultiDOS"