Analogue-sequencer

> Looking at those nice production P3 pics, I remember again 
> that the production P3 has 4 MIDI outs on the back, while 
> the DIY version I'm playing now (Boele's) only has one.
> 
> Does the OS already support those 4 outs? That would be very 
> nice! 

The four outs on the production units all carry the same single midi stream.
At the moment they just act as a built-in thru box.
But the wiring of the 4 output sockets has been kept separate in case I come
up with a scheme for providing multiple outputs to drive them.

The existing P3 CPU only has a single UART (serial interface) so it can only
provide a single output.
You can use software to emulate a UART, but the CPU doesn't have any spare
pins for this, nor would I want to put the extra load onto it.

What could be done is that an additional small CPU, I'd probably use an
18-series PIC, could be attached either to the UI bus, or memory mapped in
place of a couple of RAM locations, which would accept extra midi streams as
parallel data from the main CPU, and provide the necessary FIFO buffering
and serial conversion for additional midi outputs.

I know how I would do this in theory, but I haven't made any start on
implementing it.
If this were avaiable as a retro-fit, how many people would be interested ?

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