Does anyone have any experience with reparing this game? It's driving me batshit crazy.
Talon2000 even brought the Fluke over but the board was so f****ed that we couldn't get the boardset figured out. It appears that you have to hit a memory location to properly bankswitch the ROMs or they just don't sit in the proper address space. (WTF???)
We replaced several chips on it and got it to where it will boot with just the CPU board and not the video board. I replaced a bad 74LS74 and 2 bad 74LS245s on the video board that interface it to the CPU board and got it to boot finally. This was figured out by taking a spare 50 pin interconnect cable and pulling signals until the boardset would boot when connected.
The board plays for awhile then dies with a solid white screen. I replaced 2 more 74LS245s on the CPU board and it plays even longer, but still dies with the solid white screen.
I'm spending too much time on this as I don't like to get beat. I'm behind on shipping things because I'm spending so many hours on this pain in the ass.
Any ideas?
I have the schematics - they are available on the web.
RJ
Talon2000 even brought the Fluke over but the board was so f****ed that we couldn't get the boardset figured out. It appears that you have to hit a memory location to properly bankswitch the ROMs or they just don't sit in the proper address space. (WTF???)
We replaced several chips on it and got it to where it will boot with just the CPU board and not the video board. I replaced a bad 74LS74 and 2 bad 74LS245s on the video board that interface it to the CPU board and got it to boot finally. This was figured out by taking a spare 50 pin interconnect cable and pulling signals until the boardset would boot when connected.
The board plays for awhile then dies with a solid white screen. I replaced 2 more 74LS245s on the CPU board and it plays even longer, but still dies with the solid white screen.
I'm spending too much time on this as I don't like to get beat. I'm behind on shipping things because I'm spending so many hours on this pain in the ass.
Any ideas?
I have the schematics - they are available on the web.
RJ


