Well the one's under the cartridge are cheating devices, the Sega Megadrive, CD and 32x all required power though, so imagine having it all plugged in. It was little wonder the Ps1 slaughtered it.
Game Genie for modifying the game content, the one box with the different switches was for changing the region of the game or the one above it I think, the 32x was for 32bit games and the Sega CD was for CD games.
just sold sonic and knuckles.haha.still got some sega games for sale including sonic 3.check the sales thread if ppl still keen on those old school games for their collection.and if someone has sonic 1.i know a collector who wants it