From owner-freebsd-hackers Wed Sep 18 09:31:38 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id JAA10823 for hackers-outgoing; Wed, 18 Sep 1996 09:31:38 -0700 (PDT) Received: from root.com (implode.root.com [198.145.90.17]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id JAA10608 for ; Wed, 18 Sep 1996 09:31:04 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by root.com (8.7.5/8.6.5) with SMTP id JAA12503; Wed, 18 Sep 1996 09:31:14 -0700 (PDT) Message-Id: <199609181631.JAA12503@root.com> X-Authentication-Warning: implode.root.com: Host localhost [127.0.0.1] didn't use HELO protocol To: tam@riogrande.cs.tcu.edu cc: hackers@freefall.freebsd.org Subject: Re: Slow Etherlink In-reply-to: Your message of "Wed, 18 Sep 1996 08:07:44 CDT." From: David Greenman Reply-To: dg@root.com Date: Wed, 18 Sep 1996 09:31:13 -0700 Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk >Hi folks, > I have followed this thread for a while now, and I just thought >that I would share my observation of my 3Com 509(b?) Card. I had put this >card in a 486/33 Mhz, and it is now in a 586-133 Mhz (I forgot who made >these chips), and in both cases I was able to make transfers of up to 100 >Kb/s. What is even stranger is the fact that I was running this under >FreeBSD 2.1.0-release (and later current of that period). > Subsequently, although I know very little about hardware. I find >it hard to understand how the card would work, if the card was >misconfigured. I say this because I have always done ftp installs, and >because the interupt that my 3 Com card is using is not the default one >the kernel expects (Some silly conflict). This means that if I should >forget to tell the kernel about it with the -c flag, that the probes will >not even find the card. Or maybe I did something else, that is equally >dumb. It can work because in addition to the interrupt, there is also a 1 second timer that goes off that checks for any transmit/receive completions. This allows the card to limp along when interrupts aren't working. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project