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Date:      Thu, 13 Aug 1998 10:57:25 -0700 (PDT)
From:      Tom <tom@uniserve.com>
To:        The Hermit Hacker <scrappy@hub.org>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: More PCI Slots... (fwd)
Message-ID:  <Pine.BSF.3.96.980813105242.19010D-100000@shell.uniserve.ca>
In-Reply-To: <Pine.BSF.4.02.9808131324580.4823-100000@hub.org>

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On Thu, 13 Aug 1998, The Hermit Hacker wrote:

> On Thu, 13 Aug 1998, Tom wrote:
> 
> > 
> > On Thu, 13 Aug 1998, The Hermit Hacker wrote:
> > 
> > > Sorry, I couldn't think of anywhere else more appropriate...but, is this
> > > restricted to only Sun's, or has anyone looked at similar under an
> > > Intel/PCI environment?
> > 
> >   PCI extender boxes have been available for a long time.  Not long ago
> > there was a mention of someone who hooked several of these up to a FreeBSD
> > system.
> 
> 	The OS doesn't need to do anything special to recognize them?  Are
> there any limitations?

  It is part of the PCI standard.  PCI-PCI bridging.

> 	At work, we are looking at a Sparc Enterprise 450, which has 10PCI
> slots spread over something like 3-4 PCI busses...do the extende do
> something like that, or is it all one big bus?

  I belive each extender is considered a separate bus, but of course is
linked back to whatever bus it is plugged into.  However, some x86
motherboards have their PCI slots slit over two buses too.

Tom


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