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- Jan 19, 2024
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I've been gradually bringing pac-man back to life. I finally got the board to boot without constant reset. Some bad traces in a couple of the bus circuits and a short in the clock circuit at 3R & 3S. I finally have data on the screen, not the correct data but not a white screen. This screen occurs in test mode or run mode. The Z80 and all eproms, proms, and memory except (2A-2D) have been replaced. Same goes for both daughter cards. Many of the buffer ICs in the various bus circuits have also been replaced.
Somewhere I saw a document with screenshots of various failures but I can't find it now that I need it. Does anyone have such a document? Any suggestions on what I need to check that could be throwing these random characters on the screen?
Somewhere I saw a document with screenshots of various failures but I can't find it now that I need it. Does anyone have such a document? Any suggestions on what I need to check that could be throwing these random characters on the screen?
