From owner-freebsd-alpha Mon Jun 4 17:11:44 2001 Delivered-To: freebsd-alpha@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id 998DA37B401 for ; Mon, 4 Jun 2001 17:11:41 -0700 (PDT) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id UAA26770; Mon, 4 Jun 2001 20:11:40 -0400 (EDT) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.3/8.9.1) id f550BAx84169; Mon, 4 Jun 2001 20:11:10 -0400 (EDT) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15132.9118.863339.708828@grasshopper.cs.duke.edu> Date: Mon, 4 Jun 2001 20:11:10 -0400 (EDT) To: Mark Nipper Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: SCSI devices settling and illegal request In-Reply-To: <20010604165948.A18399@arrakis.tamu.edu> References: <15132.765.786027.851646@grasshopper.cs.duke.edu> <20010604165948.A18399@arrakis.tamu.edu> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Mark Nipper writes: > --- > > Whoohoo. So will a 3Com 905C-TX work in this thing? > That's all I need that NCR 53C875 card for... Yes. And, in fact, 3com (and intel etherexpress pro) cards are generally a better choice than tulip based nics because they can do byte-aligned DMA, whereas the tulip 21x4x chip can do only word-aligned DMA. Because ethernet headers are 14-bytes, this means all incoming frames must be copied to properly (mis)aligned mbufs on alpha, which isn't terribly efficient. Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message