[coreboot] USB debug port in ICH5?

Ed Swierk eswierk at aristanetworks.com
Fri Sep 11 03:53:44 CEST 2009

On Thu, Sep 10, 2009 at 5:13 PM, ron minnich <rminnich at gmail.com> wrote:
> I'm looking but don't see info yet on a USB debug port in ICH5, anyone know?
> The issue is that the Dell Server 1850 node I'm trying to get working
> doesn't give direct COM1 access to the P4; it goes through a (ack!
> Ptui!) baseboard maintenance controller. So to talk to COM1 you have
> to know how to talk to the BMC. This may just be another non-standard
> IPMI interface or something else, not sure, but in any case I figure
> the USB debug port might be easier.

Sec. 5.20.10 of the ICH5 datasheet
describes the EHCI debug port.

I suppose you could also try reverse-engineering Dell's configuration
utilities (bioscfg.exe and bmccfg.exe) to see how they configure the
COM1 port.


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