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> What Is The "bug" In The Sst49lf020
btownsen4
post Jan 15 2009, 01:22 AM
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There seems to be alot of responses to the "why i cant use an alternative chip" question and the response is always a "quirk" or "bug" in the SST49LF020 chip. Can someone explain this bug in a technical manner? Im interested in building a 'cheap mod' and will construct a CPLD to interface if needed.

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btownsen4
post Jan 15 2009, 04:42 AM
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Actually, I thought of a quick and easy way to "find" these features, I noticed the SST49LF020[A] does not work with the xbox, and theres this article, (www.sst.com/downloads/app_note/S72045.pdf).

Can someone confirm that the reason the A model does not work is because the System Memory Mapping redefinition? i.e. the SST49LF020A ignores LPC cycles outside of the new defined range?

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StrictPuppet
post Jan 15 2009, 06:37 AM
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Sorry I cannot give you the technical reasons anymore for why that chip doesn't work. I am sure you could build your own cheapmod for ~$5, but since you can buy a doux2 for ~$11-13, it's hardly worth the effort anymore.
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