INT 21 - Novell NetWare - MESSAGE SERVICES - ENABLE/DISABLE BROADCAST MESSAGES
AH = E1h
DS:SI -> request buffer (see below)
ES:DI -> reply buffer
Return: AL = error code
Note:   these functions are supported by NetWare 4.0+ but are not listed in
_NetWare_System_Calls--DOS_; they may be obsolete
SeeAlso: AH=E1h/SF=04h,AH=E1h/SF=09h

Format of request buffer:
Offset  Size    Description
00h    WORD    length of following data (max 9Eh)
02h    BYTE    subfunction
02h disable station broadcasts
03h enable station broadcasts
03h    ???

Format of reply buffer:
Offset  Size    Description
00h    WORD    (call) size of following results buffer
02h    ???

See also: 21E1

21E1 - Novell NetWare - MESSAGE SERVICES - ENABLE/DISABLE BROADCAST MESSAGES