Int 21 Fn C503  - Novell Netware - Synchronization Services - Signal Sema  [N]

   AX = C503h
   CX:DX = semaphore handle

Return: AL = status
       00h successful
       01h semaphore value overflowed
       FFh invalid handle
Desc:  increment the semaphore's value and signal the first process (if any)
     in the queue waiting on the semaphore

Note:  this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
     Alloy NTNX

See Also: AX=C500h"NetWare",AX=C502h