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Date: | Tue, 8 Nov 2011 07:55:34 +1100 |
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Subject: | Re: [geda-user] PCIe card? |
From: | Stephen Ecob <stephen DOT ecob AT sioi DOT com DOT au> |
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On Tue, Nov 8, 2011 at 6:04 AM, Peter Clifton <pcjc2 AT cam DOT ac DOT uk> wrote: > Has anyone here designed a PCI Express card (Using gEDA / PCB or > otherwise?) I haven't, but earlier this year Darrell Harmon was using PCB to make a PCIE x1 plug in card using an Altera Cyclone 4 GX FPGA: http://archives.seul.org/geda/user/Mar-2011/msg00077.html > I'm mainly curious as to what others have tried, and how tricky the > process was. I'm looking at doing one, and am starting to think I might > need to code support for differential traces in PCB ;). That would be awesome! I've given a little thought to it myself, but haven't had time to make anything happen. One idea I had for a quick start was to lay out and edit a PCB with the differential pairs replaced by fat single traces of thickness (2 * differential trace copper thickness + differential trace internal spacing). A fairly simple bit of code could later convert these from fat single traces to differential pairs. Best regards, Stephen -- Stephen Ecob Silicon On Inspiration Sydney Australia www.sioi.com.au
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