Full disclosure: [Óscar] isn’t nine now, but he was in 1988 when he wrote LOCS, a drawing program in Z80 assembly modeled after Logo. You can see a demo of the system in the video below. You might wonder why you’d want to study a three-decade-old program written for a CPU by a nine-year-old almost five decades ago. Well, honestly, we aren’t sure either. But it did get us thinking.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/03/16/a-nine-year-olds-z80-drawing-program/