INT 15 - MultiDOS Plus - RELEASE RESOURCE SEMAPHORE
AH = 02h
AL = semaphore number (00h-3Fh)
Return: AH = status
00h successful
01h not semaphore owner
02h invalid semaphore number
Notes:  if any tasks are waiting for the semaphore, the first task on the wait
queue will become the new owner and be reawakened
do not use within an interrupt handler
SeeAlso: AH=10h"MultiDOS",AH=1Ch"MultiDOS"

See also: 1501

1502 - MultiDOS Plus - RELEASE RESOURCE SEMAPHORE