From owner-freebsd-ppc@FreeBSD.ORG  Mon Nov 19 22:35:02 2007
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Date: Mon, 19 Nov 2007 14:33:49 -0800
From: Peter Grehan <grehan@freebsd.org>
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To: Ben Kaduk <minimarmot@gmail.com>
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Cc: freebsd-ppc@freebsd.org
Subject: Re: FreeBSD ppc livecd? disk 1?
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Hi Ben,

> I had to reboot my iBook G4 today, so I thought I'd try booting FreeBSD on it
> and see how well it worked; I also wanted to see if I could find out
> any information
> about the sound card in it, as there was a request on this list several months
> ago for that information that I believe is yet unanswered.

  I believe the iBook has a "snapper" audio subsystem, which is a Texas 
Instruments TAS3004 "Digital Audio Processor with Codec", with an i2s 
bus for the data path.

  See the NetBSD driver at src/sys/arch/macppc/dev/snapper.c

later,

Peter.