Tag Archives: repair

MOS 6526: The CIA chip You turn on your beloved SX-64 and you don’t see the blinking cursor. Don’t panic. Most probably one of the CIA chips (MOS 6526) is not working correctly. The Commodore 64 has two CIA chips. What you need to do is to replace the one that controls the keyboard, the CIAContinue reading “Fixing the Commodore SX-64: Replacing the MOS 6526”