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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"
Category: DOS-Based Task Switchers/Multitaskers - Int 15h - M
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