Quoted from Robotworkshop:Can you post pictures on how the wires for the sound are plugged in? Also of the Rottendog board.
The photo dump, as promised.
Condition of old MPU after a lot of attempted cleanup, with (original?) ROMs sitting on top:
IMG_20230102_234452342 (resized).jpg
Sound board. The ROM was actually "Music / Spch" which potentially blows my theory that it was that chip, since speech works.
IMG_20230102_233049878 (resized).jpg
Rottendog CPU:
IMG_20230102_233015798 (resized).jpg
Rottendog 11A Audio Module:
IMG_20230102_233026323 (resized).jpg
The area below that in case it's relevant:
IMG_20230102_233040976 (resized).jpg