Date: Wed, 18 Jun 2003 14:00:05 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-alpha@freebsd.org Subject: Re: 5.1beta2 on Alpha ES40 w/ 32GB pys ram Message-ID: <20030618120004.GG3626@cicely12.cicely.de> In-Reply-To: <16111.55358.756861.374441@grasshopper.cs.duke.edu> References: <16094.16676.273466.121560@grasshopper.cs.duke.edu> <20030613190624.W36168-100000@mail.chesapeake.net> <16110.27799.68056.48679@grasshopper.cs.duke.edu> <20030618005958.GD3626@cicely12.cicely.de> <20030618024716.GE3626@cicely12.cicely.de> <16111.55358.756861.374441@grasshopper.cs.duke.edu>
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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@bwct.de info@bwct.de
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