Anyone have experience with designs of these things?
It's a VIA mombo which has to work with some telcom boards.
I think we're seeing SI issues due to the use of a few inches of 25 thou pitch flex cable. Go multilayer flex-rigid with a ground plane?
Best regards, Spehro Pefhany
-- "it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com
If there are other PCI slots on the board, a riser will not work unless it is plugged into the last slot (furthest away from the CPU-PCI bridge chip). If you need to plug the riser into a different slot, you'll need a PCI to PCI bridge to create a new bus.
I don't know if PCI will work over flex or ribbon cable. The impedance changes when going from PCB to flex cable may cause problems. A PCI bus is an unterminated bus BTW. The spec says a maximum of 4 slots per bus segment is allowed.
You could move to PCI express. Because these are point to point connections, they are easier to extend to approx 1 meter (3 feet). IIRC I've already seen PCI express devices for which the card is a simple extender to a DVI-like connector. The actuall PCI express device is in an external enclosure.
-- Programmeren in Almere? E-mail naar nico@nctdevpuntnl (punt=.)
I have an ~3 dm long PCI 32 bit extender taken from a laptop docking station. It works quite ok. But SI issues can easily be noted. It might be related to that the original box had only 1 slot, and was shielded. :)
Ie extending internal computer bus is tricky. The only solution without any real concers to electrical characteristics is that of an 1-2 MHz Z80 system connected to an A/D card via 1-meter of cable.
I have one in the works, its an offset design. You need to avoid discontinuities of the ground plain that the signal rides on. It is also a reflective switching bus, that is the PCI slot closest to the PCI interface is the last to be clocked. if you need to extend it you must use the furthest slot. Get the PCI spec, it floating around on the net somewhere.
Cheers
Forgery what?
You are posting via Aioe.org NNTP Server.
You are about to be eliminated.
...Jim Thompson
-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et |
It's too bad that someone hasn't used about 12 pounds of C4 on the aioe.org server. I wonder if 'Homeland Security' should have a talk with the Italian government about aioe.org?
It is registered through Tucows inc. and is due renewal on
11-May-2008The 'operator's phone numer is listed below, if anyone would like to personally file a complaint.
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Yes, and it's not by choice. The webb interface of google groups suck. Suggestions on free usenet servers that have an NNTP interface is welcome. I was not aware of the aioe.org mess, I just found it. It worked, servers stay up, speedy etc.. So it became the choice. I will try to find a more permanent solution but for the time being aioe.org will have to do.
I think that there are free accounts on giganews or terranews. They also have reasonably priced accounts as well.
Maybe not.
Is aioe.org your real ISP? Doesn't your ISP have a news server of their own?
Thanks, Rich
There are also titannews and supernews, who may or may not have free accounts but usually have inexpensive accounts.
It's not my ISP.
They "had" and then b0rked it. Proberbly gone into club of misworking organisation. And I don't wan't to waste too much energy on it. I have a superb solution to it. But it will take time esp when doing an electronics project aswell & other stuff.
I do find webbforums to attract more of the "eternal september" type of ppl. So it's useful, but no real edge on it.
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