Ok guys, just another quick update.
I've got myself a ribbon cable and soldered it to the points listed below. The other end is attached to a printer socket (25pin DIP, not sure what they're called) which gives me 25 different outputs from the machine. It's already been modified (poorly) to provide seperate outs, but these were taken from IC and sounded terrible so I ripped them out. The printer socket is going in their place. Anyway, i've got 9 ROM pins and 9 pins from IC's 6-8, as well as resistor 82 leaving me 5 pins unconnected. The IC 6-8 group will have 9 two way (centre off) switches, allowing two simultaneous combinations, as will the Rom. I figured this was the way to go for simplicity's sake. Since i'm using a breakout box I can always make a patch-bay as well.
Does anybody have any suggestions for utilising these last 5 pins?? I was planning to connect some of the individual outs to them, so I need to know which of the caps is which instrument. Can anybody save me the bother of probing around??
I still need to finalise my switching scheme for the 6-8 group, that's gonna cause some headaches man!
Anyway, here's the pins i found to be the most creative:
IC8
5, 6, 9, & 13.
IC7
3, 5, & 6.
IC6
6 & 10.
ROM
3, 4, 7, 11, 13, 27, 24, 23, 15,