Date: Mon, 2 Aug 1999 07:52:54 -0700 From: Matthew Hunt <mph@astro.caltech.edu> To: chrisk@tpgi.com.au Cc: freebsd-net@FreeBSD.ORG Subject: Re: ed0 or ed1? Message-ID: <19990802075254.A89367@wopr.caltech.edu> In-Reply-To: <XFMail.990803000701.chris@twilight.tpgi.com.au>; from Chris Keladis on Tue, Aug 03, 1999 at 12:07:01AM %2B1000 References: <XFMail.990803000701.chris@twilight.tpgi.com.au>
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On Tue, Aug 03, 1999 at 12:07:01AM +1000, Chris Keladis wrote: > ed1: <NE2000 PCI Ethernet (RealTek 8029)> 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 <mph@astro.caltech.edu> * 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
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