[nylug-talk] LOWMEM vs. HIGHMEM performance advantage?

[Ruben Safir]

On Fri, Apr 18, 2008 at 08:08:57AM -0700, Peter C. Norton wrote:
> On Thu, Apr 17, 2008 at 09:02:36PM -0400, Ruben Safir wrote:
> > Why do we still have this ancient DOS ritual?
> > 
> > Ruben
> 
> 1) Because the kernel reserved too much address space back when 32mb
>    was big.
> 
> 2) Because PCI is 32-bits, x86 from pentium2 on has bank-switching
>    capabilities to make it sort-of 36-bits.
> 


Can you explain this in more detail, because my understand was that
GAS assembler essential addresses all ram linearly.

I'm not sure how these things affect the memory addressing.

Ruben


> -Peter
> 
> -- 
> The 5 year plan:
> In five years we'll make up another plan.
> Or just re-use this one.
> 
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