Date: Fri, 13 Jan 95 16:00:46 -0500
From: dj AT stealth DOT ctron DOT com (DJ Delorie)
To: jab AT netrix DOT com
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: PC memory access with DJGPP


If you use a physical address of 0xe0000000, it adds the base address
(0x10000000) to get 0xf0000000, maps this through the page table, and
ends up with a physical address of 0.

Using the gdt and page tables is the only absolutely accurate way of
determining if a page fault will occur.