WIZARD600XL

thanks guys I'll check that

hey folks I got two 1064 memory expansions here right next to me one of them works flawlessly, memory self-test shows no errors I connected the other one, pushed and held the option key and turned the 600XL on, but the self-test screen didn't show up, screen stayed black, that's it Turning on the computer without Option key: screeen with »READY« shows up. However, while typing some keys work, other keys do not, producing an error sound and messages like »ERROR 136« Could it be, that there's no problem with the memory chips, but with connection port, perhaps due to corrosion? What do you think?