kazanova225
Student
yellow everyone
I recently acquired a Conbatribes board with issues. the game runs well but has some graphical glitches.
i inspected the board and it looks to have no physical damage. I have no sound but someone mentioned that it was probably because I did not have a -5 volts on the board.
here is a video of the board running.
video 1
I have been searching the web for schematic so far no luck, I found a video of the youtuber @doktorzett who did a repair on the same board and it gave me a bit of info.
with that I removed the B prom which was a bit hot, and was able to see the background layer. here which has what looks like things displayed at the wrong place in a wave pattern
video 2 background
after grouding pin 10 and 11 on the B prom socket I was able to display the city layer and the characters layers.
the city has the same glitches as the background and the characters layers has some pixel artefacts. see here
City layer
character layer
so this is where I'm currently stuck, any help will be much appreciated.
with @doktorzett video I was able to identify the multiplexes, the ram, the buffers and the bprom, the palette rams, my next move will be to probe those.
hopefully someone can help
I recently acquired a Conbatribes board with issues. the game runs well but has some graphical glitches.
i inspected the board and it looks to have no physical damage. I have no sound but someone mentioned that it was probably because I did not have a -5 volts on the board.
here is a video of the board running.
video 1
I have been searching the web for schematic so far no luck, I found a video of the youtuber @doktorzett who did a repair on the same board and it gave me a bit of info.
with that I removed the B prom which was a bit hot, and was able to see the background layer. here which has what looks like things displayed at the wrong place in a wave pattern
video 2 background
after grouding pin 10 and 11 on the B prom socket I was able to display the city layer and the characters layers.
the city has the same glitches as the background and the characters layers has some pixel artefacts. see here
City layer
character layer
so this is where I'm currently stuck, any help will be much appreciated.
with @doktorzett video I was able to identify the multiplexes, the ram, the buffers and the bprom, the palette rams, my next move will be to probe those.
hopefully someone can help
