ruud.baltissen_at_abp.nl
Date: 2007-11-14 12:12:40
Hallo David,
> Systems that aren't yet running the network software won't pass
> the packetsto the next link in the ring. This can be mitigated
> by having a circuit link the in and out together until an output
> on the userport is set. ;-)
Which means that you need an incoming and outgoing line? But what about
if no computer+circuit is connected at all? Using a dummy connector that
shortcircuits those lines?
Next question: how are you going to detect that a token is sent? NMI,
generated by the Userport 6526 IMHO. But what happens if you're playing
a game or using a utility that has disabled/rerouted the vector handling
this NMI routine?
That is why I prefer collision detection or a master/slave construction.
In case of the last oneL: the master checks if a computer is present or
not and informs the other connected computers of this facts and so they
know on their turn where (not) to send the token to.
--
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/ __|__
/ / |_/ Groetjes, Ruud
\ \__|_\
\___| URL: Ruud.C64.org
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