In this video I will show you how to assemble your own SEGA MegaDrive/Genesis cartridge, using an erasable programmable ROM chip, a so called EPROM. Those can be had for relatively small money, used on eBay, for example. You also need an adapter for the popular TL866II+ programmer, to be able to read and write EPROMs up to 32 Megabits (4 Megabyte) in size. This can be used to make your own repro cartridges of rare games, homebrew or demoscene productions.