mousetrap characters disappear?

djdaveofkc

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hi guys, i have a mousetrap board that shows all the characters in the attract mode, then when you give it a credit the mouse goes down the maze to the middle(normal start) then disappears and there are no characters on the screen? Any thoughts? thanks
 
hi guys, i have a mousetrap board that shows all the characters in the attract mode, then when you give it a credit the mouse goes down the maze to the middle(normal start) then disappears and there are no characters on the screen? Any thoughts? thanks

This is usually a character (sprite) ram issue.
 
Got it figured out, it was the roms (the A one's) that have the version on them that were bad. I had a spare board so i swapped all socketed one's a few at a time til it worked. Only crappy thing is i went from version 5 to 2 but it's working perfect. anyone here burn roms for the upgrade on something like this? thanks
 
Got it figured out, it was the roms (the A one's) that have the version on them that were bad. I had a spare board so i swapped all socketed one's a few at a time til it worked. Only crappy thing is i went from version 5 to 2 but it's working perfect. anyone here burn roms for the upgrade on something like this? thanks

Usually we go to steph for roms and proms. That is his specialty, especially if you need the set. His site is

http://www.hobbyroms.com/
 
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