> My original c64 has always had major graphics corruption, there appears to be a > timing issue on colour ram when one of the scroll positions is used. I ended up > missing it when using an emulator or c128. Most games weren't affected as they didn't > scroll color ram, but there were a few games that became so unplayable I had to fix > them by changing the scrolling from 1 pixel per frame to 2 pixels every 2 frames.
I had one of the few NTSC Commodore 16s in existence. It had some kind of hardware issue which I don't remember the details of because I was 5 at the time, but which my dad managed to overcome (overheating TED chip? I remember him opening it up and smearing grease on some component) He didn't manage to overcome the other problem, which was that half the game cassettes we bought didn't actually work because they were all European and any of them that used raster effects required PAL timing.