http://www.goatstore.com/info.php?id=351955
I am pretty sure that this was supposed to add more system memory to the Genesis and allow 32X games to run smoother with the scaling.No one seems to have any clue what these were for, but if you bought a 32X and didn't have a Sega CD, you were supposed to put it on the end of your Genesis. If you don't, nothing happens. If you do, nothing happens. But at least you can say that you have an official Sega dongle.