Re: [LinuxBIOS] Question about protect mode?

[Juergen Beisert]

On Saturday 02 June 2007 10:25, Yu-ning Feng wrote:
> Please check whether I have understood correctly.
>
> The processor lauches a cycle with address = 0xFFFF_FFF0. The north
> bridge chipset explains this address. In this case, it signals the
> read line and chip select line which connect the ROM device, and
> select an address of the ROM device through PCI bus AD[31..8]. To the
> north bridge, the ROM device is like a common BIOS ROM except that it
> uses PCI bus to exchange information. Then the ROM device uses
> AD[7..0] to send 1 byte of data back to the north bridge. That 1 byte
> of data is a portion of the 1st instruction.

This could be a valid scenario, yes.

Juergen