Retrogithub.com
Someone simulated a Commodore 64 pin by pin, so you can break it on purpose
A developer who goes by antirez put c64-hw-sim on GitHub, and it simulates the Commodore 64's motherboard pin by pin.
Tag
commodore
Retrohackaday.io
Two Commodore 64 sound chips get a USB connection to modern computers
A maker who goes by LouD built a board that plugs real Commodore 64 sound chips into a modern computer.