I have just uploaded one of my old (but barely started) projects. It is a NES emulator written in python. https://github.com/x0r9/pyNESEmu At present it doesn’t even emulate half of the 6502 processor instructions. But as part of me delving into datasheets about the system, I have had to create my own dissembler. I have never created my own dissembler, but I was naturally excited to do it, as I enjoy writing my own reverse engineering tools.