From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Mon, 6 Oct 2003 08:31:44 -0600 From: Grant Grundler To: Matthew Wilcox Cc: Derek Engelhaupt , Joel Soete , parisc-linux@lists.parisc-linux.org Subject: Re: [parisc-linux] L2000/N4000 smp devices/boot compare?? Message-ID: <20031006143144.GA19370@dsl2.external.hp.com> References: <3F5CB6FB0000C2D7@ocpmta1.freegates.net> <20031002233801.23113.qmail@web12508.mail.yahoo.com> <20031003001810.GH24824@parcelfarce.linux.theplanet.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20031003001810.GH24824@parcelfarce.linux.theplanet.co.uk> Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: On Fri, Oct 03, 2003 at 01:18:10AM +0100, Matthew Wilcox wrote: > I once downloaded an N-class PDF which I've subsequently lost. > If I remember correctly, it looked like: > > CPU --+-- CPU RAM CPU --+-- CPU > DEW ||||| DEW > +--------+--------+---- Stretch ----+--------+------+ > IKE DEW DEW IKE > ||||| CPU --+-- CPU CPU --+-- CPU ||||| > Ropes Ropes > > (Elroys on the end of the ropes, of course). I thought Ike was hanging off of "Stretch" like this: CPU --+-- CPU RAM CPU --+-- CPU DEW ||||| DEW +----------------- Stretch ----------------+ DEW | | DEW CPU --+-- CPU IKE IKE CPU --+-- CPU ||...|| ||...|| 12 ropes 12 ropes DEW == Runway to Merced bus converter IKe == I/O Controller (DMA Coherency and IO MMU) 10 PCI slots are "Twin Turbo" (Double Rope) and two are "Turbo" (singl rope). "Core I/O" gets the remaining two ropes. However, the original N-class has been replaced with rp7410. Not sure if when the switchover took place. rp7410 is now kin to Superdome (HalfDome) and rp8400 (QuarterDome) and is based on a follow-on chipset. URL's here: http://www.hp.com/products1/servers/mid_range/index.html http://www.hp.com/products1/servers/rackoptimized/rp7410/infolibrary/rp7410_wp.pdf grant ps. We are completely under representing the complexity of "RAM" and all the memory controllers that made this such a hot box 4 years ago.