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    SubjectRe: Determine if card is in 32 or 64 bit PCI slot?
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    >>>>> "Johannes" == Johannes Erdfelt <johannes@erdfelt.com> writes:

    Johannes> On Wed, Aug 08, 2001, Alan Cox <alan@lxorguk.ukuu.org.uk>
    Johannes> wrote:
    >> Are you sure the card actually needs this. Most such cards support
    >> dual address cycle, so when placed in a 32bit slot will still do
    >> 64bit DMA

    Johannes> No I don't know if it's needed. I had no idea that PCI could
    Johannes> do that.

    Johannes> Is dual address cycle mandated by the PCI specs?

    According to the PCI spec "The master is required in all cases to use
    two clocks to communicate a 64-bit address, since the width of a
    target's bus is not known during the address phase."

    Aka, the answer to your question is yes.

    Jes
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