"David S. Miller" wrote: > From: Colin Ngam <cngam@sgi.com> > Date: Thu, 15 May 2003 19:36:55 -0500 > > I do not believe it is within spec to perform DAC when the > Upper 32bits are 0s. > > That is an illogical requirement in that it means PCI-X mode is > illegal in the presence of such addresses. It means that PCI-X > devices cannot work in x86 systems with <4GB of memory which is > obviously not true. No that is not the case. If you have an address that only has the Lower 32bits set, your card do a SAC and not a DAC. SAC is not prohibited in PCI-X mode. But DAC has to be supported by the card. Someone please correct me if I misread. Thanks. colinReceived on Thu May 15 18:06:09 2003
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