If you want more from other carts, let us know and we’ll expand this.
Cut them out, and place them on top of your C64 function keys.
We’ve open sourced our designs for a modern C64 that won’t kill your C64 it if breaks.
Using the 4A part will make it powerful enough to power a C128. Everything, well almost, you need is described in the project of github.
You can find a link to the project in our DIY Open Source Stuff page, found in the menu Misc -> Own Production.
It is rumored that the pcb can be fit inside the C64c model of the brick psu.