remote debug over usb vs. old serial cable?

[Daniel O'Connor]

On Friday 27 March 2009 00:52:36 Andriy Gapon wrote:
> > USB won't work for that purpose.  It requires far too much kernel support
> > to be useful after a panic.
>
> Erik,
> in fact, there is a special USB (EHCI) mode for such purposes:
> http://www.coreboot.org/EHCI_Debug_Port

That's pretty neat :)

The dongle is pretty expensive relative to the cost of a Firewire card though.

> But that requires some special HW in addition to SW support which our
> doesn't have.
>
> BTW, Ronald, it is possible that you might have a serial header on
> motherboard which is not connected to any traditional port.

You could also purchase a Firewire PCI (or PCIe) card, they aren't very 
expensive.

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part.
Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20090327/453da317/attachment.pgp