The Shredz64 project is an attempt to build an interface to connect the Playstation Guitar Hero controller (and any other PS controller) to the Commodore 64 computer, then create a Guitar Hero like game on the C64 utilizing the guitar controller.
So far the project has been going well! As you can see, the interface, which I call the "PSX64", is 98% functional (There are some tiny bugs which don't really impact functionality on the whole). Not only are all guitar functions mapped over successfully, but it works great for playing C64 games with a normal dual shock controller. What's more, since the same DB9 port is used, the PSX64 can be used on the Amiga, Atari and Sega Master System (All tested except SMS). Read more about the interface by clicking "PSX64 Interface" on the left.
The Shredz64 game itself is still in its infancy, but progressing nicely. You can read more about it by clicking "Shredz64 Game" on the left.