I have a couple of CPS1 A boards that I got from a lot of broken boards that are able to boot games, but have very bad graphics. Can someone tell me if I am looking at bad custom A chips or something else? Work RAM tests out ok, and all the colors seem to display, that as much as I can test right now. I read in another thread about a diagnostic ROM from JAMMA Arcade, but I am waiting on the correct EEPROM to arrive to be able to flash that.
