From owner-freebsd-hackers  Wed May 21 03:56:09 1997
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To: Michael Smith <msmith@atrad.adelaide.edu.au>
cc: luigi@labinfo.iet.unipi.it (Luigi Rizzo), hackers@FreeBSD.ORG
Subject: Re: DMA for IDE drives ? 
In-reply-to: Your message of "Wed, 21 May 1997 18:11:10 +0930."
             <199705210841.SAA11179@genesis.atrad.adelaide.edu.au> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Wed, 21 May 1997 03:55:26 -0700
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>Luigi Rizzo stands accused of saying:
>> 
>> one thing I have been long wondering about is whether it is possible to
>> add DMA support for IDE devices. I think many controllers now have this
>> capability, maybe some even implement it right... so, are the docs
>> available somewhere to try and implement DMA mode ?
>
>DMA support for at least the Intel Triton chipset was added some time 
>back, but never integrated with the 'wd' driver.  IIRC, DavidG did it.

   It was John Dyson, but the code had bugs and only worked on the Triton
chipset.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project