Retro Recipes did a whole video about this very thing: https://www.youtube.com/watch?v=Qhdc-jgwqVQ https://www.youtube.com/watch?v=Qhdc-jgwqVQ Studying how th

Retro Recipes did a whole video about this very thing: https://www.youtube.com/watch?v=Qhdc-jgwqVQ https://www.youtube.com/watch?v=Qhdc-jgwqVQ Studying how the old chips work and recreating them is an excellent way to document and preserve. I'm always happy for projects like these. The eventual availability of Amiga CIAs will save some old hardware, too :)