"Bolis Bortolo BB PCBDesign" <[EMAIL PROTECTED]> on 2001-03-27 03:47:44 AM
wondered:
>I followed the PCI specs about traces lenghts ( 1.5 inches for
>interface data signals and 2.5 +- 0.1 inches for the clock ).
...
>the sample board from OS doesn't follow
>the PCI specs
...
>I discovered the same situation in other boards
...
>Are those boards out of specs or what
...
>Bolis Bortolo


Meta:
There's a fine PCI SIG mailing list where topics like this get discussed in
depth.
``Send a message to <[EMAIL PROTECTED]>. In the "Subject:" line have the
word "subscribe" and that is all there is to it.''
Anyone can subscribe to this list.
More details are at
  http://www.pcisig.com/support/forum.php3
and there's even a mailing list archive there (the "PCI reflector archive").
.

To answer your actual question:
Yes, quite a few commercial cards are slightly out-of-spec. Because the PCI spec
is a little bit conservative, they usually still work OK, as long as the
motherboard and all the other cards stay within spec.

--
David Cary



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