Re: [LinuxBIOS] bios addressing

[Peter Stuge]

On Wed, Jun 07, 2006 at 09:09:18AM -0700, Tyler Pohl wrote:
> What is the first instructions address in a 2Mb bios chip ?  I'm not very
> familiar with i386 processors obviously because i assumed the first
> instruction on power up was 0h but i don't think thats the case now.  Is
> there a good flow chart somewhere on the web I don't know about ?

x86 always boot at 0xfffffff0 and BIOS ROM ends at 4GB with very few
exceptions, if any.

For a 2Mbit BIOS chip (256kbyte) that means the BIOS ROM is at
0xfffc0000 and x86 will boot from 0x3fff0 in the chip.

//Peter