Int 15 Fn 1B  - Multidos Plus - Request Resource Semaphore By Name         [T]

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

Return: AH = status
       00h successful
       02h invalid semaphore number
       03h caller already owns semaphore
       04h out of string space

Notes: (see AH=01h"MultiDOS")
   equivalent to AH=1Ah followed by AH=01h

See Also: AH=01h"MultiDOS",AH=1Ah"MultiDOS",AH=1Ch"MultiDOS",AH=1Dh"MultiDOS"