Int 15 Fn 1D  - Multidos Plus - Test Resource Semaphore By Name            [T]

   AH = 1Dh
   DS:SI -> 8-byte name

Return: AH = status
       00h semaphore not in use
       01h semaphore owned by another task
       02h invalid semaphore number
       03h caller owns semaphore
       04h out of string space

Notes: (see AH=10h"MultiDOS")
   equivalent to AH=1Ah followed by AH=10h

See Also: AH=10h"MultiDOS",AH=1Ah"MultiDOS",AH=1Bh"MultiDOS",AH=1Ch"MultiDOS"