5.1beta2 on Alpha ES40 w/ 32GB pys ram
Bernd Walter
ticso at cicely12.cicely.de
Wed Jun 18 05:00:17 PDT 2003
On Tue, Jun 17, 2003 at 11:10:54PM -0400, Andrew Gallatin wrote:
>
> Bernd Walter writes:
> > On Wed, Jun 18, 2003 at 03:00:00AM +0200, Bernd Walter wrote:
> > > In the first step I would say we should start checking cards for DAC
> > > support and if there are enough of them then do the monster window
> > > thing first.
> >
> > Forget this part.
> > I just checked a numer of cards and it seems that DAC is still a rare
> > feature.
> >
>
> How do you tell? Is there someting in config space, or do you just
> check the device's docs?
I've checked the memory base registers.
A memory base register return bit set to zero 0 and bit2/1 tell
the width (00 = 32bit, 10 = 64bit).
I don't know if this is a shure indicator.
But there are cards that definitive can't without replacement.
E.g. USB OHCI controllers are defined with 32bit DMA registers.
--
B.Walter BWCT http://www.bwct.de
ticso at bwct.de info at bwct.de
More information about the freebsd-alpha
mailing list