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PMC10 Programmer Schematic Questions

 
To my fellow PMC10 users:
 
I've recently received PMC10 schematics from Digitech, and I doesn't seem like it would be too hard to build a remote programmer, but I have the following questions which the schematics don't quite answer. Hopefully, some of you have already been down the "trial and error" path and can answer them for me. If not, I will definitely breadboard the circuit first.
 
1. How do the schematic's switch numbers (SW1A, SW2A, etc.) correspond to the buttons on the face of the programmer (SET/+, MENU/NEXT, etc.)?
 
2. How do the pins of H1/PA5 (H1A, H1B, etc.) correspond to the pins of the mini-DIN plug? Or for that matter, how are the pins of the mini-DIN plug numbered? The diagram of the mini-DIN plug given in the schematic doesn't look exactly like the real thing.
 
3. Any ideas on construction, hardware, packaging, etc.? I'm already formulating some ideas of my own, but I'd be interested in a discussion.
 
Feel free to e-mail privately if you like, and thank you all very much for any input.
 
-- Mango --