From owner-freebsd-hackers Mon Sep 11 21:05:03 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id VAA19666 for hackers-outgoing; Mon, 11 Sep 1995 21:05:03 -0700 Received: from brasil.moneng.mei.com (brasil.moneng.mei.com [151.186.20.4]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id VAA19660 for ; Mon, 11 Sep 1995 21:05:01 -0700 Received: (from jgreco@localhost) by brasil.moneng.mei.com (8.7.Beta.1/8.7.Beta.1) id XAA18652; Mon, 11 Sep 1995 23:03:53 -0500 From: Joe Greco Message-Id: <199509120403.XAA18652@brasil.moneng.mei.com> Subject: Re: Help! :-( (fwd) To: jkh@time.cdrom.com (Jordan K. Hubbard) Date: Mon, 11 Sep 1995 23:03:52 -0500 (CDT) Cc: gibbs@freefall.freebsd.org, hackers@freebsd.org In-Reply-To: <954.810877253@time.cdrom.com> from "Jordan K. Hubbard" at Sep 11, 95 08:40:53 pm X-Mailer: ELM [version 2.4 PL24] Content-Type: text Sender: hackers-owner@freebsd.org Precedence: bulk > > This is looking like it may well be a configuration problem, but I don't > > really have a clue. I did some minimal debugging and tracing but it's not > > clear to me how it's all supposed to work together. > > Well, THIS is certainly interesting: > > > de1 rev 35 int a irq 11 on pci0:10 > ^^ > > de1: not configured; kernel is built for only 1 device. > > AND > > > ahc1 rev 0 int a irq 11 on pci1:5 > ^^ > > [pci1 uses memory from fbc00000 to fbcfffff] Yeah, I noticed that only after having been able to borrow a PC to capture all the messages. Unfortunately, it is next to impossible to stop the screen and look at the messages while they are on the screen (and when the machine blows up, scroll lock and pause have little effect). However, de1 is not being installed, as far as I can tell.. > Can you explain a little more about this system? What's in the thing? > I've never seen one of these: > chip2 rev 2 on pci0:11 > Before! :-) As it's been explained to me, that is a PCI to PCI bridge ("PPB"), which "connects" two PCI busses together, or somesuch. It's a gateway onto a different bus. Apparently certain PCI peripherals, such as 4-way Ethernet cards, like to glue 4 PCI controllers together on a bus and then provide a single gateway onto the system's PCI bus. In this case, the AHA3940 apparently puts two controllers behind a PPB. I'm mostly familiar with bus bridges in other contexts, so I am not sure that my description is totally correct, and I have no idea what the issues all are. I'll be the first to admit that PCI puzzles me. I'm not really a PC hardware guy - I leave that to the geniuses like Rod. Speaking of Rod, he was the one who sold execpc.com the motherboard and PCI Ethernet cards in question. Thanks, ... Joe ------------------------------------------------------------------------------- Joe Greco - Systems Administrator jgreco@ns.sol.net Solaria Public Access UNIX - Milwaukee, WI 414/342-4847