J-CIA 64 Commodore 64 and 128 (C64 / C128) MOS 6526 CIA Replacement

J-CIA 64 Commodore 64 and 128 (C64 / C128) MOS 6526 CIA Replacement

(for the Commodore 64, Commodore 128, SX-64 and 1570/1571 drives)

FPGA based, so it functions as a piece of real hardware, identical in capability to the MOS 6526 & 8521 CIA chips that it replaces
Incorporates the complete logic set and all features of the original chips

Pass all known diagnostic & software tests (including all Wolfgang Lorenz’s test suite and the Vice-project’s CIA-tests
Hundreds of demos and games have already been tested, with no known compatibility issues

Physically very similar to the original chip size, so it fits well into all C64 boards, including EVO Rel 1 and the BluePearl. Tested with many hardware perhipherals, including Wifi Modems, the Ultimate-II+ cart, SD2IEC, TapeCart, 1351-mouse and others.

Tested with all C64 mainboard revisions, SX-64 and with EVO64 mainboard, Commodore 128 (including CP/M and disk drive burst-mode) and 1570 & 1571. Works in both 1 MHz and 2 MHz modes

Developed by Jani Laatikainen