Robocop
Data East, 1989You're currently viewing posts by Pinsider TheDrewster.
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The original MPU in my Robocop was having some big time controlled light issues, so I decided to swap MPUs for now. It was an MPU from a TMNT machine which I believe should be fully backwards compatible. But this MPU is having an issue with the display, where it's adding a right parentheses on all segments of the lower display. Is there a quick and dirty troubleshoot for this type of issue? What do I need to look at first?
Quoted from wayout440:I think you need to change the display ROM. Robocop requires version A03-4 and TMNT requires version A1.04
I don’t think there’s a separate swappable ROM for alphanumeric games? At least I can’t find one.
Quoted from PinballManiac40:Did you try reseating the ribbon cable at both connections (display and MPU)?
Yup. I’ve tried that, I’ve swapped different MPU boards, and swapped different displays. The issue is solely with this specific MPU board.
Quoted from PinballManiac40:Do you have a logic probe? Seems that is what it will take now to troubleshoot it down to the part.
I do, I just need some guidance as to where I am poking around.
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Reno, NV