Analogue-sequencer

> I need DIN Sync in or out, selectable in user configuration. 
> Handy for a use in a studio.

I had originally planned to make the DIN sync port bi-directional, and used
an interrupt input on the CPU for the CLOCK.
But it turned out the interrupt could only be triggered on a negative edge,
so the only way to make it work would have been to poll the input pin.
Ugh.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com