Ran into this on Rich's Classic Computer Pages, a PDF copy of the KIM-1 Programming Guide, which contains one of the most readable explanations of how to program 6502 assembly I've seen. I wish I had a chance to read this back then!
It's amazing how people were able to figure out how to code in ML back then, I've played around a little bit with YouTube videos to help but it is still rather difficult.
I hadn't even heard of the KIM-1 when I was programming for the Commodore, it seems amazing to me now how there was all this home computer prehistory I had no inkling of.
Back in the day when men were men and boys were boys - those in between did amazing things with amazing tech. For GLORY! I feel sorry for kids these days 😢