[iyonix-support] Re: PCI or not PCI
- From: Barrie McElroy <barrie@xxxxxxxxxxxxxx>
- To: iyonix-support@xxxxxxxxxxxxx
- Date: Thu, 28 Jun 2007 15:49:42 +0930
In message <46821572.6080003@xxxxxxxxxx>
John Ballance <jwb@xxxxxxxxxx> wrote:
> Hi
>
> the notches in pci connectors signify the signalling voltage to use..
> notch nearest card backpanel = 3.3v signalling (iyonix) .. notch
> furthest from panel = 5v signalling. (legacy PC and badly built cards)
>
Ah!
> both notches.. will adapt as required.
>
> iyonix HAS to use 3v3 signalling as the cpu cannot handle 5v signals safely.
>
Thank you John for this concise, useful explanation. That seems to be my
problem.
I really should use Wikipedia before asking qus, but without John's and
David's guidance would probably not have twigged the voltage thing.
> as a matter of interest.. some of the cards used in production iyo
> machines arrive with us without the proper key slot; I mill the relevant
> slot once I am happy the card design and chips on it will behave
> correctly at 3v3 signalling.
>
I did (very) briefly consider doing this myself, but even at the
physical level was concerned about damaging some tracks.
I am currently trying to negotiate a return of the product. If that
fails I can use it to upgrade an old PC sometime I guess.
Thanks
Barrie
> John
>
[snip]
--
-------------------------------------------------------------
Barrie McElroy RISC OS, Iyonix & Chuditch country
Consciousness: That annoying time between naps.
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