Gravitar Rom Issue?

mcandrewsoun

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My Gravitar board boots up to the score screen, then advances to the moving gravitar logo, then crashes when it tries the next screen.


Heres what Ive tried:

Test Mode indicates all roms are ok.
I did a rom swap with a Black Widow board, and the BW roms run fine, wheras the gravitar roms crash in the same spot on the BW board.
I tested each rom in my burner with rom ident, and all check out ok.

Is it possible for a rom to work in test mode, but fail during game mode?

Thanks!
Andrew
 
So the answer to this is yes. I had two bad roms.. 102 and 107. One in the program section, and one in the vector. The only way I found this was yanking roms one at a time, booting the game, and seeing what changed the behavior. With both roms hosed, when it would crash, there would be no watchdog.. so it went into a vector black hole. yanked 102, all of a sudden watchdogs. 107 was the only rom I could yank and still get to the crash point. Maybe just dumb luck..

Andrew
 
So the answer to this is yes. I had two bad roms.. 102 and 107. One in the program section, and one in the vector. The only way I found this was yanking roms one at a time, booting the game, and seeing what changed the behavior. With both roms hosed, when it would crash, there would be no watchdog.. so it went into a vector black hole. yanked 102, all of a sudden watchdogs. 107 was the only rom I could yank and still get to the crash point. Maybe just dumb luck..

Andrew

Interesting. Thanks for posting your followup.
 
Speed of the roms is a factor to, most will have the correct crc but at speed can fail if they are not fast enough.
 
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