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Microprocessor Report 970 Overview Article
The PDF summarizes much of the information on the PowerPC 970 which was presented at the Microproessor Forum in October, 2002 by Peter Sandon. A PDF of that presentation has been available since November.
While the article provides little new information, does give a good overview as well as comparison of the 970 as compared to the other PowerPC chips. Information may have changed since the time this article was published.