[LinuxBIOS] SPD as debug channel

ron minnich rminnich at gmail.com
Fri Dec 1 17:10:08 CET 2006

On 12/1/06, Peter Stuge <stuge-linuxbios at cdy.org> wrote:
> On Thu, Nov 30, 2006 at 07:44:47PM -0600, Bari Ari wrote:
> > Someone could fab these however as a 2 sided pcb with only the
> > SMBus signals for next to nothing in cost.
> I looked into this yesterday.
> The place I normally order prototype boards from (Olimex) don't stock
> any 1.2mm laminate.
> The place I order production boards from (local fab) do have 1.2mm
> laminate but the minimum order they do is one full panel (about .5m2)
> - that means a big bag of boards. :)
> If there's interest I'll be happy to make a DDR2 board that does high
> speed SPD<->USB.
> I estimate they would go at $150 assembled or a bit cheaper as kits.
> (All SMD though.)
> I need about 20 orders before starting it up, then roughly two months
> until they're shipping.
> This is pretty special-purpose though. Perhaps time would be better
> spent on the LPC thingy, since they can be used for testing too.

I am missing something here. If we have enough of PCI up to do
SPD->USB, I would bet that we have enough of it up to do USB debug? or

LPC is going away on many boards, I understand. I think that we are
going into a world where we have to figure out usb debug port. I don't
think that the PCI initial setup for USB debug is going to be
impossible -- the vendors have to debug these boards too. All the
boards I have used lately have a very straightforward path to USB,
that could be set up in the ROMCC or CAR code.


More information about the coreboot mailing list