[coreboot] option roms in SeaBIOS and Coreboot

ron minnich rminnich at gmail.com
Wed Nov 26 17:46:43 CET 2008

On Wed, Nov 26, 2008 at 8:39 AM, Kevin O'Connor <kevin at koconnor.net> wrote:

> In order to minimize the number of address decoders needed, a device
> may share a decoder between the Expansion ROM Base Address register
> and other Base Address registers. When expansion ROM decode is
> enabled, the decoder is used for accesses to the expansion ROM and
> device independent software must not access the device through any
> other Base Address registers.

Wow, I hope no hardware ever implemented that bad idea :-)

Anybody know? how is an expansion rom supposed to actually get to the
hardware at that point, I wonder. ...


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