Re: x86 36-bit support easier with Xeon?

Stefan Traby (
Tue, 7 Jul 1998 00:00:04 +0200

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.

  ciao - 

Stefan Traby phone: +43-3133-6107-2 Mitterlasznitzstr. 13 fax: +43-3133-6107-9 8302 Nestelbach mailto:// Austria

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