C64 Mods
Cosmetic mods, LED lighting, hardware upgrades and the most striking C64 builds from the community
Commodore 64 Mods: Case, LED and Hardware Modifications
C64 modding is the practice of modifying the hardware, casing or electronics of a Commodore 64 to make it more personal, more capable or more visually distinctive. It ranges from a fresh coat of paint on the keyboard bezel to a complete internal rebuild using modern components.
The C64 modding community has been active for decades, producing everything from transparent acrylic cases and LED lighting rigs to LEGO shells and custom SID chip upgrades. Each modification reflects the character of its maker and the enduring appeal of the machine itself.
On these pages we document some of the most notable modifications: from cosmetic changes and lighting effects to hardware upgrades and full case replacements.
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Cosmetic C64 Modifications: Cases, Colours and Custom Keys
Cosmetic modding covers any change to the external appearance of the C64 without altering the internal electronics. It is the most accessible form of C64 modification and produces the most visible results.
- ▶New case colours:Original C64 cases were beige or light grey. Replacement cases are available in red, blue, black, grey, white, wood grain and transparent acrylic.
- ▶Stickers and badges:Replacing the original Commodore and Commodore 64 badges with custom designs, or restoring faded originals to factory condition.
- ▶Custom keycaps:Replacement keycap sets in different colours or with redesigned legends, compatible with the original keyboard mechanism.
- ▶Custom case panels:Hand-made wooden, acrylic or 3D-printed replacement side panels and bottom plates that give the machine an entirely new character.
LED Lighting Mods for the Commodore 64
Lighting is one of the most popular and visually dramatic forms of C64 modification. LED strips fitted inside a transparent acrylic case turn the C64 into a light display as well as a working computer.
The most common approach uses LED strips mounted inside the case, with the light diffusing through the keyboard and ventilation slots. More advanced builds synchronise the lighting to the SID sound chip output, so the lights react in real time to whatever music the C64 is playing.
The Ultimate 64 Elite supports direct LED strip control, making sound-reactive lighting straightforward to implement on an FPGA-based build.
A transparent acrylic C64c case with colour-cycling LED strips, showing how lighting transforms the look of the machine while it runs.
C64 Hardware Modifications: SID, Motherboard and Power
Hardware modding goes beyond the case and into the electronics. The most common modifications involve the SID sound chip, the power supply and the motherboard.
- ▶SID chip upgrades:The SIDFX board fits into the original SID socket and allows two SID chips to run simultaneously, enabling true stereo sound playback without permanent modifications to the motherboard.
- ▶Motherboard replacement:The Ultimate 64 Elite is an FPGA-based motherboard that fits into an original C64 case and replaces the entire circuit board, maintaining full compatibility with original cartridges and peripherals.
- ▶Power supply replacement:The original C64 power supply is a known failure point. Modern replacements offer regulated output, thermal protection and a much longer service life.
C64 Modifications
Three of the most distinctive C64 builds documented on this site: a hand-crafted wooden case, a full-size LEGO computer and a personal collection of rare colour variants.
Raspberry Pi C64 Mod
One of the most practical C64 modifications combines a Raspberry Pi with a Keyrah V2b keyboard interface board inside an original C64c case. The result looks identical to a real C64 from the outside but runs a modern Raspberry Pi internally.
The Keyrah V2b translates the C64 keyboard matrix into standard USB HID signals that the Raspberry Pi understands. With VICE installed, the keyboard and joystick ports work exactly as they would on an original machine.
This combination can emulate not just the C64 but a wide range of 8-bit and 16-bit systems, all from within the original case.
Read the Raspberry Pi C64 mod guide ▶
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Explore the Commodore 64 Hardware
Joysticks, disk drives, monitors and modern add-ons: all the essential peripherals for the Commodore 64, explained.
C64 Hardware ▶
