this looks like a lot to a CORE with embedded DIN. Moreover, Microchip PIC … so ? 4685 ? I can not see well.
It is a PIC16F877
Might I suggest the discussion be taken off-forum? No offense intended…
Not sure why you needed to resurrect this old thread?
INCredibly boutiqe looking site ;D
There are many ways to make a PIC-based midi “thing”, and even more ways to program it. It really has nothing to do with Midibox, IMO. :-X