FPGA replacement for MOS 6526 & 8521 CIAs.
Complete logic and all features of the original IC's implemented.
Some tested hardware: WifiModem, Ultimate-II+, SD2IEC, Pi1541, TapeCart, 1531-mouse, all original C64 mainboards, SX-64, EVO64, Commodore 128, 1570 & 1571 drives.
More info.