On Sun, Dec 31, 2006 at 10:13:37PM -0500, Timothy Miller wrote:
> On 12/31/06, tsuraan <[EMAIL PROTECTED]> wrote:
> >> pre-installed with support at a premium. The only thing about this
> >> that's a major drawback is that the market is waning rapidly as PCI
> >> Express takes over.
> >
> >How different from PCIe is PCI? Will the work being done on the PCI
> >interface be in any way useful for moving to PCIe? Obviously, the
> >pinout is totally different, so the cards being made won't work, but
> >other than a bit of re-routing, how hard would adapting OGD1 to PCIe
> >be?
>
> At the signal level, PCI and PCIe are completely different. I doubt
> any of it would carry over. Moreover, PCIe is point-to-point, and we
> would have a hard time snooping a bus without adding loading and
> reflections on the signals.
Tapping a PCIe signal should be doable, but it would take some
serious engineering at the electrical level. What I'd try is to tap the
transmission line with a 3-arm T attenuator, with most of the power passing
straight through, and a greatly attenuated signal coming out the side arm.
Then terminate the side arm, and amplify back to standard logic levels for
compatibility with a logic analyzer. The tap adapter would have to be
implemented as a microwave PC board, with connectors to plug between the
device and the cable.
_______________________________________________
Open-graphics mailing list
[email protected]
http://lists.duskglow.com/mailman/listinfo/open-graphics
List service provided by Duskglow Consulting, LLC (www.duskglow.com)
