INT 21 - Novell NetWare - FILE SERVER - SEND CONSOLE BROADCAST
        AH = E3h subfn D1h
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status
            00h successful
            C6h no console rights
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
        the broadcast message will not be received by workstations which have
          disabled broadcasts with AH=E1h/SF=02h
SeeAlso: AH=E1h/SF=09h,AH=E3h/SF=C8h,AH=E3h/SF=D3h

Format of request buffer:
Offset  Size    Description
 00h    WORD    length of following data (max A2h)
 02h    BYTE    D1h (subfunction "Send Console Broadcast")
 03h    BYTE    number of connections to receive message
                00h = all, else specific list below
 04h  N BYTEs   connection list
        BYTE    length of message (max 3Ch)
      N BYTEs   message

Format of reply buffer:
Offset  Size    Description
 00h    WORD    (call) 0000h (no results returned)