I put together another article about it on a input device wiki: https://deskthority.net/wiki/Atari_interface https://deskthority.net/wiki/Atari_interface This

I put together another article about it on a input device wiki: https://deskthority.net/wiki/Atari_interface https://deskthority.net/wiki/Atari_interface This contains more technical info on the pinouts, the signals and how different devices and systems are incompatible. I had written it in preparation for building an adaptor for myself, and I have identified a few issues to watch out for.