So today I was cleaning the garage, and I see this little cheapo 13" CRT TV sitting there. I was reminded of an old Hackaday post that demonstrated that you can reverse the horizontal deflection coil wires, and get a mirrored image (For some reason I cant find this post). I then thought, "What would it be like to play NES games backwards??"
This is a super simple hack that took me about 30 minutes, but is fun! It adds a new dimension of play to old games.
Find and swap the Horizontal deflection wires on the yoke, as shown here:
Hook up something, and test it out! It took me a couple of attempts to find what pair is horizontal, and which were vertical.
Rip open an NES controller, and cut the 2 traces coming out of the Bottom of the "Left" and "Right" buttons. Expose some copper, and swap the traces using small wire, as shown.
Re-assemble and test... That's it! You can now play with normal controls, on a reversed screen. Here's the result: