Re: vic20 repair problem

From: Ruud Baltissen (
Date: 2001-02-21 16:02:09

> 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
> 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,
> cursor starts blinking if I apply IRQs with a wire :-)
> Any ideas?

My fair gues: 6522 UAB1, the one closest to the keyboard connector.

Groetjes, Ruud

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