Add man page for mavb(4)

share/man/man4/man4.sgimips/Makefile

@@ -1,7 +1,7 @@
-#	$NetBSD: Makefile,v 1.10 2006/12/26 04:43:10 rumble Exp $
+#	$NetBSD: Makefile,v 1.11 2007/04/13 03:48:48 jmcneill Exp $
 
 MAN=	crime.4 dpclock.4 dsclock.4 gio.4 giopci.4 grtwo.4 haltwo.4 hpc.4 \
-	imc.4 intro.4 light.4 mace.4 mec.4 newport.4 pic.4 sq.4 wdsc.4
+	imc.4 intro.4 light.4 mace.4 mavb.4 mec.4 newport.4 pic.4 sq.4 wdsc.4
 MANSUBDIR=/sgimips
 
 .include <bsd.man.mk>

share/man/man4/man4.sgimips/mavb.4

@@ -0,0 +1,68 @@
+.\"   $NetBSD: mavb.4,v 1.1 2007/04/13 03:48:48 jmcneill Exp $
+.\"   $OpenBSD: mavb.4,v 1.3 2006/08/31 12:33:42 jmc Exp $
+.\"
+.\" Copyright (c) 2005 Mark Kettenis
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd April 14, 2007
+.Dt MAVB 4 sgimips
+.Os
+.Sh NAME
+.Nm mavb
+.Nd Moosehead A/V Board audio device
+.Sh SYNOPSIS
+.Cd "mavb0 at mace0 offset 0x300000 intr 6"
+.Cd "audio* at audiobus?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the Moosehead A/V Board found on SGI
+.Tn O2
+machines.
+.Pp
+The Moosehead A/V Board uses an AD1843 codec that supports 8- and
+16-bit audio sample recording and playback at rates from 5 to 54 kHz,
+with 1 Hz resolution.
+The
+.Nm
+driver also makes it possible to control the playback volume by using
+the buttons on the front of the
+.Tn O2 .
+.Sh SEE ALSO
+.Xr audio 4 ,
+.Xr intro 4 ,
+.Xr mace 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 3.7 .
+It was later ported to
+.Nx 5.0 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by Mark Kettenis, and ported to
+.Nx
+by Jared D. McNeill.
+.Sh CAVEATS
+The analog mixer in the AD1843 codec does not provide a master volume
+control.
+Therefore, the
+.Tn O2
+volume buttons only control the output volume of the DAC.
+.Sh BUGS
+Currently only sample rates up to 48 kHz are supported.
+Recording is not implemented yet.
+The second DAC on the AD1843 codec sits idle.