🚀 go-pugleaf

In article <27661@castle.ed.ac.uk> bxhv02@castle.ed.ac.uk (Tim Wilkinson) writes:
>
>I'm looking for some info on the probability of splitting a single transputer
>link to allow it to be connected to more than one destination transputer. 

>         Tim Wilkinson 		 email tjw@cs.hull.ac.uk

A transputer uses both wires of a link, even for unidirectional
communication. Each byte that goes out, must have an acknowledge come
back before another byte will be sent.

So, don't even *think* of bi-directional communication.

The Correct Way would be to have the two 'return' wires go into a
circuit that produced a 200ns pulse (10Mhz) or 100ns pulse (20Mhz) when
one ack had been received from each return wire.

The Dirty Way would be connect one return wire, ignore the other return
wire, and hope for the best.

What could go wrong ?

Well, only that the second receiving transputer could drop, garble, and
generally behave in a very un-transputery fashion. But, if it isn't
doing anything else, and (especially) if you are nice to it and have
comms go straight into internal RAM, or you help it along by delaying
the other ack by a tick or two, you might get away with it.

Don't tell the Transputer police, though.

print ! "Just another occam hacker",   Cheers, Andy.
-- 
andyr@wizzy.com  Andy Rabagliati, RR1 Box 33, Wyalusing, PA 18853 (717)746-7780