debaser138
Well-known member
I have a Gauntlet 2 board that I'm working on. When I first got it, it would go into attract mode but all the graphics were just solid colors (but text was fine) and there was no sound. I fixed the sound problem by installing a good YM121 chip.
When the game starts and the attract music kicks in, it's supposed to show a title screen. Mine just shows a blank white screen. After the music is over and it goes into the mode where it tells you how to play the game, the text for Gauntlet II and the character listings, health, etc on the right hand side are all there but the left hand side is just a red screen. There are boxes with text that pop up in the red during the attract mode telling you about the enemies, etc. Basically all of the game graphics are coming up as solid colors.
I dumped the images for all the roms to make sure they were good. I found 1 ROM at R16 (labeled 1120) that was bad. I have another non-working Gauntlet 2 board so I pulled a good ROM from there. Unfortunately that didn't fix the issue graphics issue. I also tried swapping out all 12 RAM 6C-6K and 7C-7K from another board but that didn't fix it either.
If I go into self test, it first brings up a blank white screen. Then after a few moments it brings up a blank black screen. Then again after a few moments it goes into the switch test mode. From what the manual says, it there was a RAM or ROM error, the test mode would stay on the error page and not continue to the switch test so it appears that my RAMs and ROMs are ok.
I also tried swapping out the SLAGS at K1/K2 along with the AM9128 RAMs at L16/M16 but no change.
Any ideas on what the problem might be?
When the game starts and the attract music kicks in, it's supposed to show a title screen. Mine just shows a blank white screen. After the music is over and it goes into the mode where it tells you how to play the game, the text for Gauntlet II and the character listings, health, etc on the right hand side are all there but the left hand side is just a red screen. There are boxes with text that pop up in the red during the attract mode telling you about the enemies, etc. Basically all of the game graphics are coming up as solid colors.
I dumped the images for all the roms to make sure they were good. I found 1 ROM at R16 (labeled 1120) that was bad. I have another non-working Gauntlet 2 board so I pulled a good ROM from there. Unfortunately that didn't fix the issue graphics issue. I also tried swapping out all 12 RAM 6C-6K and 7C-7K from another board but that didn't fix it either.
If I go into self test, it first brings up a blank white screen. Then after a few moments it brings up a blank black screen. Then again after a few moments it goes into the switch test mode. From what the manual says, it there was a RAM or ROM error, the test mode would stay on the error page and not continue to the switch test so it appears that my RAMs and ROMs are ok.
I also tried swapping out the SLAGS at K1/K2 along with the AM9128 RAMs at L16/M16 but no change.
Any ideas on what the problem might be?
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