Hi this is my first post on these forums. I wanted to see if anyone knew anything about this type of flash cart. I believe I saw somewhere before it was called a DMG Multi-Cart Checker but I could be wrong. There are 2 eeprom chips on the one I have and they each have a build of the game Go Go Tank on it. Any info at all would be appreciated I'm just curious to find out what it really is because it seems like most of the proto carts looked like regular carts with an open top.
That's one of the older GB prototype boards. Newer ones got smaller, like the same size as regular carts. It's only a "cart checker" if it has the checker EPROM on it.