Jump to content

Category:Commodore 64 Modifications and Enhancements

From RetroTechCollection
⚙️ Commodore 64 Modifications and Enhancements
Commodore 64 modifications and enhancements to save and make the most out of your C64


Modifications & Upgrades Description
JiffyDOS Kernal Upgrade Commercial ROM replacement, installation, feature set, legal sources.
Jump-less Dual-Kernal Switcher DIY and ready-made boards for toggling between two or more Kernals without a hole-mounted toggle.
PLA Replacement Options EPROM “hack” PLAs, PLAnkton, GAL-based RealPLA, CPLD / FPGA solutions, compatibility matrix.
Ultimate 64 Motherboard Fully FPGA-based drop-in board, configuration menu, HDMI output and 48 MHz turbo mode.
C64 Reloaded MK2 Individual Computers re-issue, modern regulators, ZIF sockets, optional on-board SID filter presets.
SixtyClone Bare-Board Project Open-hardware replicas of the 250407, 250425 & 250466 PCBs, assembly tips.
SuperCPU and Turbo Accelerators The SuperCPU v2, Chameleon 64 turbo, Pi1541-based “PiStorm64” projects.
SD2IEC & IEC-2-SD Adapters SD-card floppy emulators, firmware families, case builds, JiffyDOS interplay.
Tapuino / Tape Emulation Mods Arduino-based Datasette replacements, OLED menu versions, accuracy tweaks.
Dual-SID & Stereo SID Boards SwinSID-dual, MixSID, SIDFX, addressing, filter-trim, stereo-mix wiring.
6581↔︎8580 Voltage Switch Jumper or MOSFET-switched 12 V↔︎9 V rail, filter-cap selection, MOS 8580 in breadbins.
Lumafix64 Video Noise Suppressor Jail-bar reduction theory, fitting guide, before/after scope plots.
S-Video / Composite Bypass Mod RF-modulator removal, direct-drive amplifier boards, 75 Ω impedance matching.
Analog RGB / Component Output Tim Worthington’s RGB board, s-video-to-Y-Pb-Pr converters, CRT vs. flat-panel results.
Switchless PAL/NTSC VIC-II Mod Crystal switching, 8565/8562 dual-VIC daughter-boards, Kernal auto-detect.
Internal Universal Power Regulator Replacing 7805/7812 with cool-running switch-modes, 9 VAC sensing, ripple tests.
Heat-Sinking & Active Cooling Guide PLA/SID/VIC heatsinks, quiet 40 mm fan mounts, thermal-pad alternatives.
On-board RAM Expansion (256 KiB) Persistence / GEORAM clones inside the case, DMA-less design, software support.
Cartridge-Port Break-Out Backplanes Cartridge port risers, diagnostic header, EasyFlash stacking considerations.
User-Port USB-Serial Interface μC-based USB adapters, PETSCIIscope terminal, firmware flashing.
C64 Saver / Over-Voltage Protectors Ray Carlsen design, SaV64, SaRuMan-64—principle of crowbar vs. latch-off.
Internal Pi1541 Hat Integration Mounting a Raspberry Pi zero/3A+ inside, cooling, OLED status screen.
SID Player LED VU Meter Mod Using CIA timer IRQs (software) vs. hardware envelope followers, acrylic light bars.
Keyboard-LED Caps-Lock & Drive-LED Hacks Adding a caps-lock indicator, dual-color disk-access LED wiring.
Switchable Kernal/BASIC ROM Banking (32 KB EPROM) 27C256 adapter boards, three-way rotary or soft-switch, menu ROMs.
RTC and Battery-Backed SRAM Mods DS1307/3231 boards on the user port, KFF RTC, backing up high-score tables.
Wireless Joystick Receiver 2.4 GHz modules in DB-9 shell, low-latency protocol, power from 5 V pin.
Internal Wi-Fi Modems ESP8266/ESP32 inside the housing, wedge command set, BBS how-to.
External Memory-Mapped DAC / SID-Kick 8-bit parallel DAC projects, dual SID-Kick FPGA board, tracker support.
PETSCII Keyboard Overlay Back-Light Edge-lit acrylic, USB-powered, fitting under stock keycaps.