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The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

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Re: [vox-tech] Physical Memory vs. Reported Memory
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Re: [vox-tech] Physical Memory vs. Reported Memory

On Tue, Jul 10, 2001 at 10:58:37PM -0700, Mark K. Kim wrote:
> > 1. Memory size detection by the kernel is not reliable on i386
> >    architectures above 64Mb. 
> > 
> > 2. The GRUB bootloader can generally detect the memory size reliably
> >    and will pass the size it finds to the kernel!
> > 
> > 3. The hardware memory check is done by the BIOS, well before the kernel
> >    loads, so Linux knows nothing about it.
> Then one can ask: How does Windows do it and why can't we do the same?

Most likely using real-mode BIOS calls. Linux always runs in proctected mode.

Henry House
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