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In <2436@deadmin.ucsd.edu> lu@topcad.ucsd.edu (George Lu) writes:

>1) Is there any previous or ongoing transputer systems that uses the
>   hypercube type interconnection? For a 16-node system, each transputer
>   would have to use all 4 channels for communication. Is there a way to
>   multiplex the channels to handle more transputer-to-transputer 
>   interconnections?

If you need more than 4 links per node in your hypercube, you can use
more than a single transputer per node.  E.g., two transputers connected
by one link have 6 links free, so allow for a 64 node hypercube consisting
of 128 transputers.

The 93.1 release of our PACT Parallel C compiler features virtual
channels, removing the logical restriction of 4 outgoing (and incoming)
channels per processor.  With virtual channels, arbitrary logical networks
can be implemented on arbitrary hardware, with multiplexer and router
processes automatically inserted where necessary to allow any task to
connect to any other task in the entire system.  The upcoming T9000
provides hardware support for this, of course.

>Thanks in advance for any helpful pointers. Either post or mail is fine.

Hope this helps.  Feel free to email me if you have additional questions
or comments.

>George Lu

Best,

Rob

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