Apple Desktop Bus Protocol (2021)

As the author mentions doing it, a note regarding retrobright: it seems to cause faster yellowing than not using it. https://youtu.be/_n_WpjseCXA

Maybe just let your items show their age.

ADB was pretty solid. A shared-single-wire bus that allows multiple slaves by including an address in the message... but includes a protocol-level reset that's used regularly, so a missed single bit doesn't jam things up unrecoverably. When I think of how many fewer hours of my life I would have wasted had I2C learned this lesson...