by Daniël Mantione Daniël contributed the commented disassembly of the FC3 freezer functionality to the reverse engineering effort at github.com/mist64/final_cartridge. Thanks to Eric Schlaepfer for his input on 6502 timing. Freezer cartridge theory One key reason why the Commodore 64 was so successful in the 80s was that it was able to do things it wasn’t designed for. Freezer cartridges, which allowed stopping any running program or game, applying cheat codes and resuming, or saving the comple...