INT 21 - Novell NetWare - MESSAGE SERVICES - BROADCAST TO CONSOLE
        AH = E1h subfn 09h
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status
            00h successful
            FCh full message queue
            FEh out of dynamic workspace
Desc:   send a one-line message to the system console on the default file
          server
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AH=E1h/SF=00h,AH=E1h/SF=01h,AH=E3h/SF=D1h

Format of request buffer:
Offset  Size    Description
 00h    WORD    length of following data (max 3Eh)
 02h    BYTE    09h (subfunction "Broadcast to Console")
 03h    BYTE    length of message (01h-3Ch)
 04h  N BYTEs   message (no control characters or characters > 7Eh)

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