1.\" $NetBSD: vidcaudio.4,v 1.5 2009/03/09 17:59:35 joerg Exp $ 2.\" 3.\" Copyright (c) 2003, 2004 Ben Harris 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. The name of the author may not be used to endorse or promote products 15.\" derived from this software without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27.\" 28.Dd January 18, 2004 29.Dt VIDCAUDIO 4 acorn32 30.Os 31.Sh NAME 32.Nm vidcaudio 33.Nd VIDC audio device driver 34.Sh SYNOPSIS 35.Cd "vidcaudio0 at vidc0" 36.Cd "audio* at vidcaudio0" 37.Sh DESCRIPTION 38The 39.Nm 40driver provides support for the audio system of the 41.Tn ARM VIDC20 42and of the video and sound macrocell of the 43.Tn ARM7500 44and 45.Tn ARM7500FE . 46.Pp 47The driver can work in two modes, either using the internal 8-bit 48DACs of the 49.Tn VIDC20 50and its internal reference clock, 51or using the serial sound output of any supported chip 52feeding external 16-bit DACs and an external sound clock. 53On systems with a 54.Tn VIDC20 , 55the choice of mode is based on the 56.Ql *Configure SoundSystem 57setting under 58.Tn RISC \&OS . 59.Sh SEE ALSO 60.Xr audio 4 61.Sh HISTORY 62The 63.Nm 64driver was introduced in 65.Nx 1.2 . 66The driver was largely rewritten for 67.Nx 2.0 68because it had bit-rotted so far as to be useless. 69.Sh AUTHORS 70The first version was written by Melvin Tang-Richardson. 71The rewrite was by Ben Harris. 72