Int 21 Fn DE  - Novell Netware - Message Services - Get Broadcast Mode     [N]

   AH = DEh
   DL = 04h

Return: AL = current broadcast mode
       00h receive server and workstation broadcasts (default)
       01h receive server broadcasts, discard user message
       02h store server broadcasts for retrieval
       03h store all broadcasts for retrieval

Note:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+