The C64C was an update to the C64 that brought a more modern look (for its time) to the Commodore 64. After Commodore finished off its stock of motherboards, it also got a new updated “short board” that cost a lot less to produce. By the time the Commodore 64 was discontinued, they were able to make them at about $20 a pop. Pretty good for something that retailed for about $100.
These short boards were not actually 100% compatible with the older version. Many of the parts were not interchangeable with older boards, and the famous SID chip was actually changed. (If you’re curious, you can test this with a C64C by playing Impossible Mission. If you can’t hear “stay awhile…. staaaaay forever!” then you have the updated SID chip.) Compatibility with the older C64 approached 100% but didn’t quite get there.
Anyway, this particular model has one great advantage: lots of empty space under the keyboard for modifications! So below is what I did with mine, in video and in higher resolution pictures.
- Added a reset switch.
- Replaced the KERNAL ROM with JiffyDOS. (My board did not have socketed chips, so I had to remove the old ROM and install a socket.)
- Internally mounted a uIEC/SD — a great sd2iec-based device for mass storage from Retro Innovations. Easily the most gratifying part of this project!
- Installed all four control switches for the uIEC/SD, too, and
- Gave it a gold paint job with a shiny clear coat.