From owner-freebsd-smp Tue Apr 29 00:04:48 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id AAA00764 for smp-outgoing; Tue, 29 Apr 1997 00:04:48 -0700 (PDT) Received: from jumping-spider.aracnet.com (root@jumping-spider.aracnet.com [204.188.47.14]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id AAA00746 for ; Tue, 29 Apr 1997 00:04:43 -0700 (PDT) Received: from cbrowni2-home (ppp-r21.aracnet.com [205.238.13.23]) by jumping-spider.aracnet.com (8.8.5/8.8.5) with SMTP id AAA10745; Tue, 29 Apr 1997 00:05:20 -0700 Message-ID: <33659138.D27@earthling.net> Date: Mon, 28 Apr 1997 23:12:08 -0700 From: Chris Browning Reply-To: brownie@earthling.net X-Mailer: Mozilla 3.01 (WinNT; U) MIME-Version: 1.0 To: Poul-Henning Kamp CC: smp@freebsd.org Subject: Re: Quad Pro 150 motherboard? References: <291.862250592@critter> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > >The PPro's are stackable without additional electronics external > >to the processor. This makes it a *lot* easier to do multiple > >CPU's up to large numbers. > > The original design was for up to four PP's to be stackable. > Unfortunately it transpired to not be the case (for reasons > for signal integrity I belive, and therefore 4*PP cards have > a number of buffers more than 2*PP cards. What are you talking about here? I have never heard anything about having to add buffers for > 2 PPP designs. Can you point to a PPP errata for this? I think someone has misinformed you. Chris Not speaking for Intel.