Editing Category:Commodore 64 Modifications and Enhancements

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__NOTOC__{{CategoryHeaderBox
| title = ⚙️ ''Commodore 64 Modifications and Enhancements''
| subtitle = Commodore 64 modifications and enhancements to save and make the most out of your C64
}}
{| class="wikitable styled-table" style="width:100%; text-align:center;
!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.
|-
|'''[[Commodore 64 Power-Supply Protector (C64 Saver)|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.
|}
[[Category:Commodore_Systems]]