My close encounters gottlieb is using portions of the high score as credits. I.e. 77601 high score comes up as either 77 credits or 60. I went through the tests and zeroed out the bookeeping. But as soon as i play it the first high score controlls the credits. It doesnt use them either. It just stays at 77 or60.
Bad mpu? Ive heard of grounding issues confusing the board.