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    SubjectRe: x86 36-bit support easier with Xeon?
    Followup to:  <>
    By author: Stefan Traby <>
    In newsgroup:
    > Hi !
    > > 'How do we DMA into >4G physical RAM?'
    > >
    > > 2) PCI cards which support 64 bit addresses might work (ie. none of most
    > > current PCI cards, and i guess chipsets arent too overtested either,
    > > regarding this feature).
    > Hmm, the current "64 bit" PCI-Slots (ex. on Alphas) allow 64 Bit data but
    > only 32 bit addresses. This is no real problem for current boards
    > (UX && BX: 6x512M == 3GB max mem); but I'm not shure if the PCI specs
    > covers 64 bit addresses at all; I don't think so.

    They do, but it's an extension, and most cards don't support them it

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