My first home computer was a OSI C2-4P and I wired it up with two jacks to certain keys and replaced the plugs on two Atari VCS joysticks for playing games on i

My first home computer was a OSI C2-4P and I wired it up with two jacks to certain keys and replaced the plugs on two Atari VCS joysticks for playing games on it. Later I bought an Atari 400 and modded it with a kit that replaced the membrane keyboard with a real keyboard.