Matched Pair MOS 6526 CIA – 1985 Date Code – Tested Working – Commodore 64

Original matched pair of MOS 6526 CIA chips for Commodore 64 systems.

Both chips carry 1984 manufacture date codes and have been tested together as a set.

Each pair has been:

• Bench tested in a dedicated chip tester
• Installed and tested under load in a known-good Commodore 64
• Verified for stable timer, I/O, and interrupt operation

These chips are being sold as a matched pair and were confirmed working together before listing.

Guaranteed Working

This matched pair is fully tested and backed by a 30-day guarantee. If you experience any issue, I offer free returns or replacement.

Ships via USPS (rates calculated by , no markup).