Gottlieb rarely released ROM updates, so most of the time, the ROM that came with the game was the only version that was released.

Also, make sure that the battery has been removed from the MPU and that there is no battery damage on the board.

Here's a page for Gottlieb System 80 information:

http://pinwiki.com/wiki/index.php?title=Gottlieb_System_80

That should give you an overview of the game system and photos of the boards so you can identify them.

Caveman-specific information is rather thin, unfortunately.

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