Hoping maybe someone can point me in a good direction here...this is my first Asteroids board I'm messing with. It's Ray's (Mundomans) and I figured I'd try to fix it now that I have the Fluke and all.
The problem is that it watchdogs in both test and game modes. If you disable the watch dog the test mode pattern looks fine, but its missing the dip switch codes and whatever else is supposed to be there. The crosshatch and gradient are there. In game mode its hard to tell on the oscope but in the cab I think it started to draw a P like for Push Start or something.
I tested Rams and Roms with the fluke, all test good. I also tested the addressing/data for the dip switches - seems to read them perfectly fine.
Can someone point me in a direction from here? These things have a helluva lot of signals going on!
The problem is that it watchdogs in both test and game modes. If you disable the watch dog the test mode pattern looks fine, but its missing the dip switch codes and whatever else is supposed to be there. The crosshatch and gradient are there. In game mode its hard to tell on the oscope but in the cab I think it started to draw a P like for Push Start or something.
I tested Rams and Roms with the fluke, all test good. I also tested the addressing/data for the dip switches - seems to read them perfectly fine.
Can someone point me in a direction from here? These things have a helluva lot of signals going on!
