2005-06-22 08:19:09 +04:00
|
|
|
.\" $NetBSD: ac97.4,v 1.2 2005/06/22 04:19:09 kent Exp $
|
2005-06-21 22:11:38 +04:00
|
|
|
.\" $OpenBSD: ac97.4,v 1.12 2003/02/18 07:54:53 jmc Exp $
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 1999, 2000 Constantine Sapuntzakis
|
|
|
|
|
.\"
|
|
|
|
|
.\" Author: Constantine Sapuntzakis <csapuntz@stanford.edu>
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\" 3. The name of the author may not be used to endorse or promote
|
|
|
|
|
.\" products derived from this software without specific prior written
|
|
|
|
|
.\" permission.
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
|
|
|
|
|
.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
|
|
|
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
|
|
|
|
|
.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
|
|
|
|
.\" OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
|
|
|
.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
|
|
|
.\" LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
|
|
|
|
|
.\" USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
|
|
|
|
.\" DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.Dd October 7, 1999
|
|
|
|
|
.Dt AC97 4
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm ac97
|
|
|
|
|
.Nd generic AC97 codec driver
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
AC97 codecs contain the analog-to-digital (A/D), digital-to-analog
|
|
|
|
|
(D/A), and mixing circuitry of many modern sound cards.
|
|
|
|
|
AC97 codecs, for the most part, do not talk to host busses like the PCI bus
|
|
|
|
|
directly.
|
|
|
|
|
Instead, they communicate through an interface chip, called
|
|
|
|
|
the host controller.
|
|
|
|
|
The Ensoniq AudioPCI 97 (see
|
|
|
|
|
.Xr eap 4 )
|
|
|
|
|
is an example of such a host controller.
|
|
|
|
|
.Pp
|
|
|
|
|
Unlike many drivers, the
|
|
|
|
|
.Nm
|
|
|
|
|
driver does not appear in the configuration file.
|
|
|
|
|
Instead, the driver is automatically attached by the drivers that require it.
|
|
|
|
|
.Sh SEE ALSO
|
2005-06-22 08:19:09 +04:00
|
|
|
.Xr auacer 4 ,
|
2005-06-21 22:11:38 +04:00
|
|
|
.Xr auich 4 ,
|
2005-06-22 08:19:09 +04:00
|
|
|
.Xr auixp 4 ,
|
2005-06-21 22:11:38 +04:00
|
|
|
.Xr autri 4 ,
|
|
|
|
|
.Xr auvia 4 ,
|
|
|
|
|
.Xr clcs 4 ,
|
|
|
|
|
.Xr clct 4 ,
|
|
|
|
|
.Xr eap 4 ,
|
2005-06-22 08:19:09 +04:00
|
|
|
.Xr emuxki 4 ,
|
2005-06-21 22:11:38 +04:00
|
|
|
.Xr esa 4 ,
|
2005-06-22 08:19:09 +04:00
|
|
|
.Xr esm 4 ,
|
2005-06-21 22:11:38 +04:00
|
|
|
.Xr fms 4 ,
|
|
|
|
|
.Xr neo 4 ,
|
2005-06-22 08:19:09 +04:00
|
|
|
.\" .Xr repulse 4 ,
|
2005-06-21 22:11:38 +04:00
|
|
|
.Xr yds 4
|
|
|
|
|
.Sh BUGS
|
|
|
|
|
The
|
|
|
|
|
.Nm
|
|
|
|
|
driver does not keep track of the current user settings and instead
|
|
|
|
|
relies on the hardware to do this.
|
|
|
|
|
.Pp
|
|
|
|
|
The
|
|
|
|
|
.Nm
|
|
|
|
|
driver could do more to detect mixer channels that don't work and cull
|
|
|
|
|
them from the list.
|
