J-CIA64 6526/8521 Replacement for Commodore 64/128/1570/1571

Main features and specifications:

FPGA based replacement for MOS 6526 & 8521 CIA chips Complete logic and all features of the original IC's implemented All diagnostic & software tests passed 100%, including all tests in Wolfgang Lorenz's test suite and Vice-project's CIA-tests. Vice's ciaports-tests may show partially incorrect results, but then again, original CIAs can show variable results too. Hundreds of demos and games already tested with no known compatibility issues. Physically about the same size as the original CIAs, and drops right in place of the original chip without any mainboard modifications or soldering required. Lots of peripheral hardware tested and found to be compatible including (but not limited to) WifiModem, Ultimate-II+, SD2IEC, TapeCart, 1351 mouse. Tested with all C64 mainboard revisions, Commodore 128 (including CP/M) and 1570 & 1571 disk drives. Works in 1 MHz and 2 MHz modes. The 6526/8521 has been tested during beta with a 1581 drive too and confirmed to work. The correct chip for the 1581 drive would be the Amiga 8520. Full compatibility can therefore not be guaranteed. This "J-CIA64" -version is not compatible with Amiga / 8520-CIA and cannot be later converted or upgraded to be. Amiga-compatible version will be separate product that will be released later.

Disclaimers:

J-CIA / J-CIA64 reproduces the functionality of the original MOS CIA's. Because it's a reproduction, it cannot be ever fully like the original. Logic aims to be exactly like the original, but there may be differences that have not been found yet. Electrically J-CIA is "close enough" to the original CIA, but it is not exactly the same. Although tested with a LOT of hardware and software, compatibility with ALL hardware and software cannot be guaranteed. Installing the J-CIA requires careful handling. Manufacturer or seller cannot be held responsible for any possible damage this product may cause to your equipment due to incorrect installation or mishandling of the product.

The J-CIA was recently featured in an episode of Retro Recipes (make sure to subscribe!)

https://www.youtube.com/watch?v=EL2HVRtjuIg For EU customers, price listed includes applicable VAT rate