Fixing a Poorly Commodore 64 (Part 1)
Following on from the previous post where I’d removed the SID and desoldered the PLA, and with a Commodore 64 that was still exhibiting a fault, I moved onto the next stage of the diagnostics, removing and testing the DRAM. This was a fairly straightforward task, and mostly covered in the video. At the end, it appeared that I was still having issues with the address lines on the CPU, so the next stage was …