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



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