Hi there,
I'm trying to repair a GYRUSS bootleg.
it has a strange problem: the game plays properly but sound effects are corrupted.
Sound effects means:
- percussions ok
- music (organ) ok
- explosion, fire and other effects don't work properly.
here a bad video
https://www.youtube.com/watch?v=7cgYMrRYJv8this is what I understood:
CPU
-8035 in E7 is dedicated to percussions
-Z80 for the rest
-replacing both CPUs had no effect on the problem
SOUND GENs
-8910 in D/E 11 and 12 are dedicated to the sound effects. Removing them I have good music + percussions but no sound effects (and no corruptions)
-removing (and replacing then) all 3 4066 seems to have no effects on the sound in general
any idea?
thank you
