[coreboot] Super I/O: Winbond LPC Super I/O WPCN381U

Peter Stuge peter at stuge.se
Thu Apr 7 17:39:49 CEST 2011

Jeremy Moles wrote:
> > To clarify, superiotool has functions internally for writing to
> > registers in superios,
> I will need to find whatever register corresponds to GPIO03 and
> set just that particular HIGH bit?

Yes. Look at the data sheet and maybe as a help you can step through
superiotool as well.

> (Other keywords in their email were things like "GPIO:0x2" and
> GPIO:0x18", but I haven't been able to get any additional
> clarification from them...)

Superios are easier to program than many other components, and are
well documented, so you shouldn't have too much trouble. GPIO 3 is
what you need to know about how the hardware is built.


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