This last week I started by updating the Incredible KIMplement, my MOS/Commodore KIM-1 emulator for the Commodore 64.
No, that’s not a joke. The KIMplement runs real KIM-1 code using a software 6502 core I’ve christened “6o6” (6502-on-6502). 6o6 implements protected memory, exception handling and all legal NMOS instructions. In addition, the KIMplement not only emulates those famous six seven-segment LEDs and the hex keypad, but also is one of the few KIM-1 emulators that emulates a TTY connection (an old-school ASR-33) and a KIM-4 expander with 16K of RAM, allowing you to run “big programs” too.
Via a discussion on Hacker News [ The KIMplement 0.2b: a KIM-1 emulator for the Commodore 64 | Hacker News ]