On Wed, 21 Feb 2001, Nicolas Welte wrote: > Hi, > > I have a VIC20CR (PAL) here that gives me a headache. The really big problem > is that all chips except the three LS245 are soldered in and I don't want to > remove them without having an idea of what is bad. > > This machine starts up almost fine, the correct amount of RAM is displayed > (even with expansion plugged in), but no IRQs are generated (thus the cursor > is not blinking) and some character colors are messed up, they turn to > purple. After each reset the purple is somewhere else, so it's probably not a > bad color RAM but a bus conflict or something. Maybe even a bad VIC. Oh, the > cursor starts blinking if I apply IRQs with a wire :-) > > Any ideas? VIC chip Timing circuits Address multiplexers - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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