The GEOS operating system managed to clone the Macintosh GUI on the Commodore 64, a computer with an 8 bit CPU and 64 KB of RAM. Based on Maciej Witkowiak’s work, I created a reverse-engineered source version of the C64 GEOS 2.0 KERNAL for the cc65 compiler suite: https://github.com/mist64/geos The…
Source: Reverse-Engineered GEOS 2.0 for C64 Source Code