Date: Wed, 18 Sep 1996 09:31:13 -0700 From: David Greenman <dg@root.com> To: tam@riogrande.cs.tcu.edu Cc: hackers@freefall.freebsd.org Subject: Re: Slow Etherlink Message-ID: <199609181631.JAA12503@root.com> In-Reply-To: Your message of "Wed, 18 Sep 1996 08:07:44 CDT." <Pine.SUN.3.91.960918063751.2967A-100000@sabine>
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>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
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