Mappy Background Issues

Lamonsoff

Well-known member

Donor 2020, 2024
Joined
Mar 27, 2020
Messages
1,103
Reaction score
1,234
Location
Okotoks, AB
I'm at the point that I now have a semi-working Mappy board after someone horrible attempt at a repair. The last part of the puzzle is to get the background working. See the pics below. Unfortunately when I put it into test, that screen is blank so I can't see if it's throwing any codes. I'm assuming it's the video board. All roms are good, as is ram. My fear is it's a prom or pal that's gone. I don't have a spare to confirm which board or to swap parts with.

Thoughts?

Thanks
 

Attachments

  • IMG_1981.jpeg
    IMG_1981.jpeg
    404.3 KB · Views: 16
  • IMG_1983.jpeg
    IMG_1983.jpeg
    386.4 KB · Views: 16
I can't tell you specifically what to look for outside of look at the usual Namco custom chips. there's probably something that controls the generation that's faulty
 
Back
Top Bottom