Great step-by-step guide on hacking the Atari Flashback 2 Console, adding a cartridge port to play old 2600 games – “So, you’ve decided to take your Atari Flashback 2 console to the next level? Well then, here are the basic details to help assist you in hacking/modding your console into a full fledged Atari 2600 system that can use your original cartridges.” Link.