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+.\"
+.\" Copyright (c) 1999 Seigo Tanimura
+.\" All rights reserved.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd December 18, 1999
+.Dt CSA 4
+.Os FreeBSD
+.Sh NAME
+.Nm csa
+.Nd Crystal Semiconductor CS461x/462x/428x PCI bridge device driver
+.Sh SYNOPSIS
+.Cd "device csa0"
+.Sh DESCRIPTION
+The
+.Nm
+bridge driver allows the generic audio drivers including
+.Xr pcm 4
+to attach to the following PCI sound cards:
+.Bl -bullet -tag -width 2m indent
+.It
+Crystal Semiconductor CS461x/462x Audio Accelerator
+.It
+Crystal Semiconductor CS428x Audio Controller
+.El
+.Pp
+Some onboard CS4610 chips accompany with not CS4297 AC97
+codec but CS423x ISA codec. Such the configuration is not
+sypported by
+.Nm
+yet.
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 4.0 .
+.Sh SEE ALSO
+.Xr pcm 4
+.Sh AUTHOR
+.An Seigo Tanimura Aq tanimura@r.dl.itc.u-tokyo.ac.jp