RE: Fautly memory?

From: Baltissen, R (Ruud) (
Date: 2003-08-13 14:35:29

Hallo Mario,

> As usual, I got hold of a broken C-64 (three, actually), with 
> an interesting problem: when turned on, it randomly displays 
> "818 MEMORY FREE" or "326 MEMORY FREE".
> ....
> My first thought was that one of the RAMs is faulty, but am I 
> correct to suppose so? Is there some other part I could point 
> my finger of blame at?

I had one with a similar problem and it turned out to be a faulty
addressline-multiplexer, 74LS257, U13 or U25.

   / __|__
  / /  |_/     Groetjes, Ruud
  \ \__|_\


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