Date: Mon, 4 Jun 2001 20:11:10 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Mark Nipper <nipsy@tamu.edu> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: SCSI devices settling and illegal request Message-ID: <15132.9118.863339.708828@grasshopper.cs.duke.edu> In-Reply-To: <20010604165948.A18399@arrakis.tamu.edu> References: <15132.765.786027.851646@grasshopper.cs.duke.edu> <20010604165948.A18399@arrakis.tamu.edu>
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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
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