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Sorry, I mean like a 'universal' circuit board for a controller - one that could potentially be integrated into several different console projects. And was wondering what the most useful or common interface is between the two - seperate pins for each button, or combined as a serial signal? Do the ...

...if you were designing a general purpose gamepad PCB, would it be more useful to have all of the buttons available as seperate signals or as a serial output like the (S)NES controller's 4021 IC? is there a general standard as to how controller pinouts apply to "on a chip" systems? thanks for any ...

...nobody? they look pretty similar to me:

http://www.flickr.com/photos/garyfixler ... 063066942/

http://i24.ebayimg.com/04/i/000/8d/5b/ff22_1_b.JPG

I've found that the D-Pad and A&B buttons are directly interchangeable between the NES controller and the original GameBoy (but not the rubber pads or the Select & Start buttons) but does anyone know if this is true for later GameBoy models, or even SNES controllers, so replacement buttons for those ...