> > I saw an example of switching in real mode in linux' sources (it looks
> > pretty clear) and thouhgt it is possible to do the same under FreeBSD.
> > The problem is I'm absolutely lost in FreeBSD's physical memory management
> > implementation (page tables and directory and so on).
> 
> That code is quite broken. You need to check out the ones I mentioned
> earlier. All that the code does in the linux kernel is fail badly.
> 
> Actually there used to be in freebsd some really nice code for popping
> into real mode and back again. It was to support calling BIOS for certain
> things.

I believe the code is still there, and it's used for APM bios calls,
if I remember correctly.



Nate

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