Over the years I've written a bunch of things in the orbit of retrocomputing, the largest of which was an incremental game based on a C64 emulator. Somehow I've never written anything substantial for the C64 itself; this post documents my learning while implementing a graphical effect in assembly language, over the course of twelve thousand words and three digressions into side quests.

Let me know if this was entertaining, useful or even both.

That's absolutely great read - especially recently I'm trying to get back to the childhood fun with C64 myself and re-learn some of the little programming I did back then, learn something new. Articles like this are a treat, thank you!