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Have you seen this little daughter board on a cps2?

Kidkaos

Kidkaos

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Like the title says, have you seen this daughter board? And what's it for? I bought this cps2 board off YAJ and it doesn't work. Opened it up and it has no battery. Is this little board some kind of battery bypass? I see a bunch of little solder pads like the undamned infinikey...board boots to black ⚫️ screen. Probably suicided. Any guesses?
 

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That's simply a rom board to extend the Q-Sound rom space, because there is only 2 slots in the main B board dedicated to that. Some games use that to allocate more sound data space.
 
Perfectly normal daughter board or C-board. Looks like original roms with no battery, so needs an Infinikey or Phoenix chips. I may be very wrong, but I believe if Super had an Infinikey, it'd be on top near where the battery should've been.

Edit: looks familiar because I just replaced the original battery on my blue Super this weekend. Still working since '93!
 
Thanks for clarification guys. I haven't opened a green board before so was like wth maybe it's rare 😅 I've only opened blue and red/orange cases. Almost was thinking it was a communication board or something. Good to know
I may have a spare infinikey somewhere. But if I don't, does anyone have a spare they wanna sell? Or know somewhere that has them in stock?
 
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