Date   : Wed, 13 May 2009 15:14:22 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: net monitor - help pls!

"Mark Usher" wrote:
> > I think it's an immediate operation iff the port number is zero.
> 
> Port number 0 and 255 are used to indicate that reception may occur
> regardless of the port number on the incoming packet.
 
Transmission on port 0 indicates an immediate operation, with the
operation code contained in the control byte.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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