VICE EMULATOR
The VICE emulator emulates any of the Commodre 8-Bit microcomputers.
MISSING FIRMWARE OR KEYMAPS
This is a common issue and is generally an issue with the packagers and licensing issues. Thankfully the fix is incredible easy. To see if you are having this category of issue, run the program on a terminal so you can see the output, and thus any errors. If it is indeed the problem...
- Go and download the source code zip/tarball. Sourceforge page
- Open it and inside you will see a "data" directory.
- The contents of that will need to be copied from there into ~/.vice/.