On Thu, Sep 14, 2006 at 08:58:43AM -0400, Thor Lancelot
Simon wrote:
> On Thu, Sep 14, 2006 at 02:49:53PM +0200, Manuel Bouyer
wrote:
> >
> > With a 32bit non-PAE system you can't have much
more than 3GB physical memory
> > anyway, because in the 4GB physical address space
you have to put all what's
> > memory-mapped: RAM, BIOS roms, PCI memory-mapped
space, etc ...
> > usually all of this needs about 1GB, so out of the
4GB RAM one part of it
> > (1GB) is mapped above 4GB and can't be accessed
by 32bit systems.
>
> It's usually more like 200MB.
Depends on the system. On an Intel systeme here (i955x) I
couln't get
less than 600M, with only display, on-bopard network and one
IDE controller
active in BIOS. Enabling all SATA and PATA, and USB
controllers bumps it to
more than 800M. I immagine it could be more than 1G if all
PCI slots were
populated.
--
Manuel Bouyer, LIP6, Universite Paris VI.
Manuel.Bouyer lip6.fr
NetBSD: 26 ans d'experience feront toujours la
difference
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