> From grr@shandakor.tharsis.com Tue Jun 10 15:16:38 1997
> Date: Tue, 10 Jun 1997 18:14:49 -0400 (EDT)
> From: George Robbins <grr@shandakor.tharsis.com>
> To: port-sparc@netbsd.org
> Subject: Re: Sun4m Audio
> Delivered-To: port-sparc@NetBSD.ORG
> 
> 
> There seem to be two kinds of Sparc Audio.  The flavor used on the sun4c
> systems is pretty simple, but the one used on sun4m's like the SS10/20 uses
> the "DBRI" to drive the audio chip.  This is an AT&T ISDN driver chip of
> some complexity that happens to be able send a bit stream to/from the audio
> chip as one of it's tricks.  Getting docs for this chip out of AT&T and
> getting it to do something useful is a considerable challenge...notice there's
> no ISDN driver floating around either...  8-)
> 

The DBRI chip is not "supported" by AT&T. AT&T has farmed this out
to CoSystems. They can provide you with docs and sample chips if needed.
Check out www.cosystems.com.

Good luck.

-brad w.