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    SubjectRe: More info on port 80 symptoms on MCP51 machine.
    Allen Martin wrote:
    >
    > Nothing inside the chipset should be decoding port 80 writes. It's
    > possible this board has a port 80 decoder wired onto the board that's
    > misbehaving. I've seen other laptop boards with port 80 decoders
    > wired onto the board, even if the 7 segment display is only populated
    > on debug builds.
    >
    > We use PCI port 80 decoders internally for debugging quite often, so
    > if there were some chipset issue related to port 80 it would have
    > showed up a long time ago, and this is the first I've heard of
    > hangs related to port 80 writes.
    >

    Presumably you have programmable decoders to trigger SMI? If not, then
    they're probably doing the equivalent in a SuperIO chip or similar.

    -hpa


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