9fans archive / 1997 / 07 / 66 /    prev next

From: jmk@pla... jmk@pla...
Subject: [9fans] ne2000
Date: Tue, 22 Jul 1997 16:29:59 -0400

i can get 100% of a 100Mb/s link with UDP on a 21140 based card.
what are you doing wrong?

------ forwarded message follows ------

>From cse.psu.edu!owner-9fans Tue Jul 22 15:58:04 EDT 1997
Received: from cse.psu.edu ([130.203.3.50]) by plan9; Tue Jul 22 15:58:04 EDT 1997
Received: from localhost (majordom@localhost) by cse.psu.edu (8.8.6/8.7.3) with SMTP id PAA15035; Tue, 22 Jul 1997 15:37:03 -0400 (EDT)
Received: by claven.cse.psu.edu (bulk_mailer v1.5); Tue, 22 Jul 1997 15:36:57 -0400
Received: (from majordom@localhost) by cse.psu.edu (8.8.6/8.7.3) id PAA14996 for 9fans-outgoing; Tue, 22 Jul 1997 15:36:52 -0400 (EDT)
X-Authentication-Warning: claven.cse.psu.edu: majordom set sender to owner-9fans using -f
Received: from ncube.com (hundl.ncube.com [134.242.5.163]) by cse.psu.edu (8.8.6/8.7.3) with SMTP id PAA14989 for <9fans@cse...>; Tue, 22 Jul 1997 15:36:46 -0400 (EDT)
From: ncube.com!beto
Message-Id: <199707221936.PAA14989@cse...>
Date: Tue, 22 Jul 97 12:27:37 PDT
To: cse.psu.edu!9fans
Subject: Re: [9fans] ne2000
Sender: cse.psu.edu!owner-9fans
Reply-To: cse.psu.edu!9fans
Precedence: bulk

In <199707230448.64603.out.baker@pla...>
 David Hogan <dhog@lor...> wrote:

> > the datsheets and application notes for the dp8390 explain most of what you need
> > to know about the wrteched ne2000. they're available on-line at the national
> > semiconductor website.
> 
> Thanks, I'll check it out.
> 
> > no matter how cheap you say it is, it's not worth the money.
> 
> After looking at the driver code, I have to agree.  Reading in
> packets using INSx -- what is this, the stone age??
> 
> The target application is talking to an ISDN gateway, so
> efficiency isn't crucial.  But if cable modem ever arrives,
> I'll probably want a better ethernet card (or if I get
> a second computer...).
> 
> So, which ethernet cards do PCI bus mastering?  :-)

PCI Cogent Ethernet and Fast Ethernet adapters are very good.
We get 60% of a 100mbits link using UDP. These are not
supported on the release, but you could get the information to
write a driver from Digital Semiconductor 
(DECchip 21140A PCI Fast ethenet Lan Controller). 
The interface is very similar to a lance controller 
and it does scatther send (up to two).