Space Invaders - relationship between Mother/Daughter boards?
So, I have two SI motherboards, and three SI daughter boards. I have one of the motherboards working. When using daughter board A, I get perfect gameplay, but no sounds. When using daughter board B (which is actually an Invader's Revenge sound board), the game boots far enough to show player 1 / high /player 2 scores but nothing else happens. When using daughter board C, the game boots to garbage.
If the motherboard is the same and works, what's different about these daughter boards that the game won't play with two of them? I was under the assumption that the daughter board was 100% for sound only, and also for collecting the player inputs / coinup.
EDIT: When I try to boot w/ the Invader's Revenge sound board & Invaders Revenge Roms, the game boots to garbage. :\
DOUBLE EDIT: for clarity.
So, I have two SI motherboards, and three SI daughter boards. I have one of the motherboards working. When using daughter board A, I get perfect gameplay, but no sounds. When using daughter board B (which is actually an Invader's Revenge sound board), the game boots far enough to show player 1 / high /player 2 scores but nothing else happens. When using daughter board C, the game boots to garbage.
If the motherboard is the same and works, what's different about these daughter boards that the game won't play with two of them? I was under the assumption that the daughter board was 100% for sound only, and also for collecting the player inputs / coinup.
EDIT: When I try to boot w/ the Invader's Revenge sound board & Invaders Revenge Roms, the game boots to garbage. :\
DOUBLE EDIT: for clarity.
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