Rare CSG branded 6526A chip for the Commodore 64 computer from U.S. seller.  Also referred to as a CIA chip, this particular CSG 6526A chip was recently pulled (carefully) from a used Commodore 64 computer.  The production date code for this particular chip is 3489 which indicates it was manufactured in the 34th week of 1989 meaning that it is one of the newer 6526A chips ever produced.  The production date codes on most other 6526 and 6526A chips are usually significantly older than this one!  The used Commodore 64 computer this chip was pulled from tested ok around 15 years ago but hasn't been tested or used since then.  We assume this chip is still ok but after that many years who knows!  30-day guarantee regardless.  The legs are in good condition.  

We ship these chips in special static-resistant chip boxes with black crisp anti-static foam to protect them.

We take note of the production date codes of all chips shipped and will put a little (numbered) warranty sticker on the bottom of the chip before shipping it in order to make sure that any returns are chips which we actually sold.  Any returned chips which do not match the production date codes or which have missing or damaged warranty stickers will not be refunded.

The Commodore 64 and 128 both use two of the 6526 chips.  One is for keyboard and joystick input and the other is for data input from external devices.  The most common symptom of a 6526 or 6526A chip failure is a joystick that won't go one direction or another or a keyboard with certain patterns of letters that won't work.  Of course a defective joystick could also be the problem.  However, if you have tested multiple joysticks and they all have the same problem going one direction or the other then it is very likely that you need to replace a 6526 or 6526A chip.  The 6526 and 6526A chips are usually damaged by touching static electricity to one of the game ports.  If you get this chip from us PLEASE make sure to keep static electricity away from your computer!  Static electricity can easily come from carpets or from touching the front of old television screens or monitors.  If you do get static electricity on you PLEASE touch something which is electrically grounded before touching your Commodore 64 or 128 computer-- especially around the game ports!

Note: Our shipping price is a couple of dollars higher than our actual shipping cost on these normally because of our cost on the special anti-static boxes which we ship them in.

We have been selling Commodore hardware, parts and accessories for nearly 39 years (since 1983) and have a great reputation.