thanks for your interest
sorry, I do not have a camera that can take decent photos, so I toke a couple, and added visual hints to one, in case you can't see every spot
(click to enlarge)
by the way, here are some test I made: (I'm repeating test now, just before hitting SEND)
with the bankstick circuit unplugged and ICs unmounted(looking at the schematic I made in eagle), using OHM-Meter:
- every IC pin that should be connected to GND, it is in connection with GND pin. every other: not.
- every IC pin that should be connected to +5V, it is in connection with +5V pin. every other: not.
- the 2 wire data bus does not touch +5V neither GND
- the 2 wire data bus is consistent (J4:2 touches only IC1:6 and IC2:6, J4:3 touches only IC1:5 and IC2:5)
with the bankstick attached to core, and core powered on, I can measure 5V between GND and 5v on every IC
that should exclude problems in the bankstick circuit itself
R2: ok (brown,black,red,gold = 10*100 = 1k)
R12: ok 1k too
as I said (text in the photo), I refer to red wire on ribbon cable as GND, and I measured +5V between GND and +5V on the bankstick circuit
given the tests I made above, it should be very unlikely.
unfortunately I don't have access to a logic probe or an oscilloscope... I don't know what to do then.
every other part is functional (sid functions, audio output, midi io, etc..)