3 .\" $OpenBSD: harmony.4,v 1.7 2004/03/15 13:27:48 miod Exp $
6 .\" Copyright (c) 2003 Jason L. Wright (jason@thought.net)
7 .\" All rights reserved.
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
12 .\" 1. Redistributions of source code must retain the above copyright
13 .\" notice, this list of conditions and the following disclaimer.
14 .\" 2. Redistributions in binary form must reproduce the above copyright
15 .\" notice, this list of conditions and the following disclaimer in the
16 .\" documentation and/or other materials provided with the distribution.
18 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 .\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
22 .\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 .\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 .\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 .\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 .\" POSSIBILITY OF SUCH DAMAGE.
35 .Nd CS4215/AD1849 audio interface
37 .Cd "harmony* at gsc?"
38 .Cd "audio* at harmony?"
43 .Tn Crystal Semiconductor
45 16-Bit Multimedia Audio Codec
49 .Tn SoundPort(R) Stereo Codec
50 chip to implement the audio device interface described in
52 This device is found on most
57 has a maximum precision of 16 bits and has a stereo input and stereo output.
63 also provides two additional channels for an add-on
64 card with two fax/voice modems.
66 One of the hardware registers reflects the state of the
68 bus that is used to communicate with the codec and thus
69 being sampled at a low accuracy secondary frequency
72 produces poor quality random bit stream that is fed into the
76 An incomplete list of machines that feature
92 B132L[+], B160L, B180L+
94 C100, C110, C132L, C160[L], C180, C200, C240, C360
96 J200, J210[XC], J280, J282, J2240
113 To trigger entropy collection
115 bus has to be programmed into the data mode that happens once
116 a single buffer of data has been played or recorded.