[openbeos] Re: HaikIu PXE boot
- From: "François Revol" <revol@xxxxxxx>
- To: openbeos@xxxxxxxxxxxxx
- Date: Sun, 07 Jan 2007 12:41:10 +0100 CET
> Marcus Overhagen <marcusoverhagen@xxxxxxxx> wrote:
> > In protected mode, there shouldn't be any 1MB barrier. Something in
> > the
> > kernel's vm_init seems to go wrong when the page directory it at
> > 0x100000.
>
> I would rather think it's the boot loader's fault - it might mess up
> the pages there for some reason (for example when jumping into real
> mode). Maybe we should look into this one day (ie. open a bug for
> it).
Could it be somehow related to A20 that must be enabled manually at
some point ? Maybe you fill in the page tables before enabling A20 in
which case you are actually overwriting 0x00000...
François.
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