- The main game pcb (left) which conatins all the game code
- A smaller separate sound board (right) which contains and processes all the game sounds
Finally there are two cables:
- A ribbon cable (akin to a PC IDE cable) which transfers all the sounds from the sound board back to the main board
- A power/sound cable which provides power to the sound board from the main board
So needless to say when I fired up the game for the first time I had no audio.