From owner-freebsd-net Mon Aug 2 7:54: 4 1999 Delivered-To: freebsd-net@freebsd.org Received: from wopr.caltech.edu (wopr.caltech.edu [131.215.240.222]) by hub.freebsd.org (Postfix) with ESMTP id 25B891507F for ; Mon, 2 Aug 1999 07:53:57 -0700 (PDT) (envelope-from mph@wopr.caltech.edu) Received: (from mph@localhost) by wopr.caltech.edu (8.9.3/8.9.1) id HAA89472; Mon, 2 Aug 1999 07:52:54 -0700 (PDT) (envelope-from mph) Date: Mon, 2 Aug 1999 07:52:54 -0700 From: Matthew Hunt To: chrisk@tpgi.com.au Cc: freebsd-net@FreeBSD.ORG Subject: Re: ed0 or ed1? Message-ID: <19990802075254.A89367@wopr.caltech.edu> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.4i In-Reply-To: ; from Chris Keladis on Tue, Aug 03, 1999 at 12:07:01AM +1000 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, Aug 03, 1999 at 12:07:01AM +1000, Chris Keladis wrote: > ed1: rev 0x00 int a irq 10 on pci0.11.0 > ed1: address 00:00:01:00:a6:f7, type NE2000 (16 bit) > > And in the kernel config file, i've specified: > > device ed0 I think the reasoning goes like this, and I'm sure someone will correct me if I'm wrong: PCI devices are discovered earlier in the boot process than ISA devices. Therefore, when PCI devices are found, the kernel doesn't yet know what ISA devices will be present. If a driver supports both PCI and ISA devices (as "ed" does), PCI unit numbers will start at 1, to leave 0 available for ISA devices found later. This phenomenon is also observed with "pcm", the sound driver. It seems that PnP ISA devices are found before non-PnP ones, so most people with PnP sound cards end up with a pcm1 instead of a pcm0. This behavior is normal and expected, and you shouldn't worry about it. Matt -- Matthew Hunt * Science rules. http://www.pobox.com/~mph/ * To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message