Tag: 6526

Current FPGA replacement for MOS 6526 and 8521 CIA chips with selectable old- or new-CIA behavior.

The official project page links multiple current retailers, and AmericanRetro exposed a direct Buy Now route on 2026-07-30. The maker says the implementation passes its diagnostic and software suites but explicitly warns that a reproduction cannot be guaranteed identical under every hardware and software combination. Clockwork64's maker separately reports problems with J-CIA replacements.

Tested period 6526, 6526A, and 6526B interface chips for repairing either CIA position in a Commodore 64.

Retroleum listed tested original CIA variants with stock on 2026-07-30, but the store was temporarily closed until approximately the beginning of August. These are finite harvested period parts. Confirm that ordering has resumed, the pin and test condition of the selected part, and the return terms.

Adds an internal SwiftLink-compatible ESP8266 Wi-Fi modem to the flat-model Commodore 128 while leaving its cartridge port available.

The assembled Tindie listing was retired by 2026-07-30, while the open project retains hardware and firmware material. The archived Tindie instructions specify socket U4, but the maker's merged README says U2, and human review found no surviving material that resolves the conflict. Do not install from the catalog summary; inspect the project files and verify the correct CIA socket against the exact board.

Adds an internal SwiftLink-compatible ESP8266 Wi-Fi modem to supported Commodore 64 longboards and Commodore 128DCR systems.

The assembled Tindie listing was retired by 2026-07-30. The open project retains Eagle design files, firmware, patches, and installation material. This is a board-specific internal installation that requires removing and reusing a 6526 CIA plus routing flying leads; verify the motherboard revision and instructions before fitting it.