>Would it be simpler to dedicate the needed number of
>pins on each PIC, and have them pass info back and
>forth just using bit status?

If I was doing this I would use the method that TI80 series calculators have
to talk to each other. This will involve bit-banging the pins, but will
allow either device to be the master, without needing to do specific
handovers.

See http://www.ticalc.org/pub/text/calcinfo/tixx_guide.zip

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