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+.\" $OpenBSD: bba.4,v 1.1 2011/09/04 20:10:16 miod Exp $
+.\" $NetBSD: bba.4,v 1.7 2008/04/30 13:10:53 martin Exp $
+.\"
+.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 $Mdocdate: September 4 2011 $
+.Dt BBA 4 alpha
+.Os
+.Sh NAME
+.Nm bba
+.Nd IOASIC Baseboard Audio device driver
+.Sh SYNOPSIS
+.Cd "bba0   at ioasic?"
+.Cd "audio* at bba?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the IOASIC baseboard audio found on
+DEC 3000 systems.
+The baseboard audio driver is based on the AMD 79c30 ISDN and audio interface.
+The interface is only capable of playing and recording 8kHz mu-law audio.
+.Sh SEE ALSO
+.Xr audio 4 ,
+.Xr intro 4
+.\" .Xr ioasic 4
+.\" .Sh HISTORY
+.\" The
+.\" .Nm
+.\" device driver appeared in
+.\" .Nx 1.5 .
+.\" The name for the driver was adopted from the same driver in ULTRIX.