Overlaping IO resource for AMD K8

Stefan Reinauer stepan at openbios.org
Tue Jan 18 09:29:01 CET 2005


* Eric W. Biederman <ebiederman at lnxi.com> [050118 20:29]:
> In addition it is quite possible some of those cards still follow the original
> option rom specification (pre pci enhancements) which simply requires 
> the 0x55aa signature the length byte and the jump to the entry point.

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.

Stefan




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