Overlaping IO resource for AMD K8

Ronald G. Minnich rminnich at lanl.gov
Tue Jan 18 09:32:00 CET 2005

On Tue, 18 Jan 2005, Stefan Reinauer wrote:

> Also, the 0x55aa sequence has to be at any 4k boundary within the rom.
> Before that any data may occur. IIRC the standard does not say that the
> option rom image has to start at the beginning of the physical chip.

I never saw that requirement adhered to in practice. In fact some vga 
bioses we have seen have several bios versions in one chip.


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