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How do I identify a "good" or "bad" DMA chip?

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I've seen conflicting information about whether this DMA debacle is or isn't really a thing that can be fixed with a few well placed capacitors. I too would like to see a "modern" definitive answer on this topic.


I do seem to have an affected unit, though. My 520 STE won't interface with either a Satandisk or Supra 20gb. I can see at boot it does attempt to read them, but no dice. An older STM doesn't have these issues.



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