[coreboot] USB debug cables and emulation

[Joseph Smith]

On Thu, 26 Jun 2008 21:36:04 +0200, Peter Stuge <peter at stuge.se> wrote:
> On Thu, Jun 26, 2008 at 03:29:00PM -0400, Joseph Smith wrote:
>> > USB 2.0 Host-to-Host Cable
>> > http://www.pccasegear.com/prod3972.htm
>> >
>> > The USB 2.0 LINK & NETWORK CABLE
>> > http://www.linkusb.com/
>> >
>> > USB 2.0 Host-to-Host Cable
>> > http://www.datapro.net/products/UL2.html
>> >
>> > PCLinq2 (PL-2501) Hi-Speed USB Bridge Cable
>> > http://www.usbfiletransfer.com/
> 
> None of these cables work.
> 
> 
>> Hmm, hardware wise, what is the difference between these and the
>> NET20DC?
> 
> The above are typically Communication Device Class functions, while
> the NET20DC is a Debug Class funcion.
>
That's the software side right? I'm wondering about physical hardware?
> 
> Please read the Debug Class specification which is linked from the
> wiki page. That spec is easy to grok if you already know USB. :)
> 
Maybe that's my problem, I know some about USB (thanks to coreboot), but
not a whole lot. If I did, I would already have UHCI and EHCI working in
filo :-)

-- 
Thanks,
Joseph Smith
Set-Top-Linux
www.settoplinux.org