The Commodore 64 isn’t kept alive by its manufacturer. It’s kept alive by a remarkably durable community of repair experts, hardware designers, archivists, and YouTubers — many of whom have been at it for decades. This is the short list I keep in my head when something on the platform breaks or I’m trying to figure out what’s possible now. Carlsen sits at the top because that’s where I started; the rest are people and places I’ve found indispensable since.
Repair and how-it-works
- Ray Carlsen — Decades of hands-on Commodore 8-bit repair distilled into chip-vs-symptom guides, schematics, service notes, and his own modern replacement power supplies. The reference for anything PET / VIC-20 / C64 / C128 / 1541 / 1571 / 1581 that won’t boot.
- Adrian’s Digital Basement — Long-form repair videos with a heavy Commodore lean. Adrian’s known-good test rig — a working C64 board with ZIF sockets at the major positions — is the model for how to drop a suspect chip in and confirm it’s bad in seconds.
- The 8-Bit Guy (David Murray) — Approachable hardware history, restorations, and original projects. Also designed the Commander X16, a from-scratch new 6502-based machine built in the spirit of the era.
- 8-Bit Show and Tell (Robin Harbron) — The software-side counterpart: BASIC, 6510 assembly, demoscene tricks, less-common machines (Plus/4, C16). The channel for understanding what the C64 actually did, not just how it was repaired.
- Bil Herd — Original Commodore engineer (lead designer of the C128). His talks and Hackaday writeups are some of the only first-person accounts of how this hardware actually got built.
Modern hardware vendors and designers
- Gideon Zweijtzer / Ultimate — The 1541 Ultimate II+ cartridge and the Ultimate-64 FPGA board lineage. Same engineering line that became the new Commodore 64 Ultimate.
- Christian Simpson — Retro Recipes / new Commodore — Retro Recipes YouTube channel, then the investor group that acquired Commodore Corporation BV and brought the C64 Ultimate to retail in 2025.
- Jim Brain — RETRO Innovations — Long catalog of C64 hardware including the Epyx FastLoad Reloaded cartridge that lives on my breadbin’s expansion port, plus various IEC interfaces, X-Pander boards, and cassette adapters.
- Individual Computers (Jens Schönfeld) — Long-running source of C64 hardware including modern PLA replacements like PLAnkton.
- Retrocomp (retrocomp.cz) — Source of the ARMSID drop-in SID replacement that’s in my SX-64.
- The Future Was 8-bit (TFW8b) — UK-based shop and the most accessible source in Europe for Commodore hardware. Sells pre-built Pi1541 units, the Penultimate multi-cart, replacement keycaps, and a long list of small-batch hardware that would otherwise mean tracking down individual hobbyist makers.
Archives, forums, and references
- zimmers.net (Bo Zimmerman’s archive) — The deepest archive of Commodore firmware images, schematics, service manuals, technical reference material, and primary-source documentation on the open web. Predates most modern community sites and is what other archives mirror from. The first place to look when something obscure isn’t on Carlsen’s site.
- CSDb (Commodore Scene Database) — The C64 demoscene’s canonical archive. Releases, parties, groups, sceners, and decades of productions catalogued and downloadable. Where you go to understand why the C64’s demoscene is still active in 2026.
- Lemon64 — The community’s general-purpose forum and game database. Active, opinionated, and the place where most repair / mod / “is this real” questions surface.
- CBM-Hackers mailing list — Long-running, low-volume, high-signal mailing list for deep-technical Commodore work — schematic-level questions, ROM disassembly, firmware reverse-engineering, hardware quirks at the cycle level. Where you go when Lemon64 isn’t deep enough.
- Gamebase64 — Catalog of nearly every C64 game release, with cover art, manuals, and playable D64s. Companion archive to Lemon64.
- C64-Wiki — Community-maintained encyclopedia. The default first stop for “what does this POKE address do” / “what year did this game ship” / “which revision of the 1541 is this.”