Hey guys. Nice to be back after a while. Sorry but I didn't know where else to put this. My megadrive was having problems with graphics so I opened it up for a look: See that red thing? It's a plastic cover that says DO NOT REMOVE. Guess what I did. So, yeah. Protected by that cover is a how-ever many pinned card: Have a close look at it, then at the bottom of one of your game cartridges. It seems to be the same type of card. A quick try with the top of a 'Sonic & Knuckles' cartridge confirms this. So, what's it for?