[coreboot] USB POST card

[Andrew Goodbody]

Myles Watson wrote:
> I was hoping for a PCI POST card that buffered codes so that they could 
> be read from another computer by USB.  Then it wouldn't depend on 
> working USB or serial, just port 0x80.

The USB debug port requires much less support than full blown USB and so 
can be used in restricted environments. PCI seems to be going away and 
even when it is present port 80h does not always work by default, it can 
need configuring.

Support for passing POST codes or even progress strings over USB debug 
devices would be very useful indeed.

Andrew