I was in my twenties, I was hugely turned on by the electronics I was learning, and I was bursting with creativity! There's a little bit of Back Story explained here, especially the "my KIM" section at the bottom of the page. http://laughtonelectronics.com/Arcana/KimKlone/BrideOfSon%20...

Also I'm a Forth fan, and when when I realized the counter/timer of a 6522 could be tricked into serving as IP for a 9-cycle machine-code NEXT instruction, the idea amused me immoderately (LMFAO) and I had to build the darn thing! :oD Previous HN thread here: https://news.ycombinator.com/item?id=3070169