Analogue-sequencer

> Thanks for that, but that wouldn't explain why the midi dump from the 
> P3 to the computer, which seemed to work OK, could not then be 
> reloaded back in to the P3.

Rather than trying to solve two problems at the same time, let's see if
we can work out why the firmware update isn't working.
If you get that fixed and the bulk dump still doesn't work, I'll be
surprised.
The firmware update code and the P3 main program are completely
separate. The CPU config is quite different between them (polled midi
rx/tx in the FWU vs interrupt driven in the P3 code for example, FWU is
pure assembler, P3 is 99% C). Given this level of difference, and the
fact that the interface hardware seems to be OK, it strongly suggests a
common, external cause of sysex failure.

Here's a thought... you could mail me your pattern dump, and I'll check
it here. If it works for me, the problem will have to be in your
re-transmission of the data to P3.

Cheers,
Colin f