1 files changed, 117 insertions, 0 deletions
diff --git a/static/netbsd/man4/man4.hppa/harmony.4 b/static/netbsd/man4/man4.hppa/harmony.4
new file mode 100644
index 00000000..aa449cfb
--- /dev/null
+++ b/static/netbsd/man4/man4.hppa/harmony.4
@@ -0,0 +1,117 @@
+.\"     $NetBSD: harmony.4,v 1.3 2022/05/15 00:06:09 gutteridge Exp $
+.\"
+.\"     $OpenBSD: harmony.4,v 1.7 2004/03/15 13:27:48 miod Exp $
+.\"
+.\"
+.\" Copyright (c) 2003 Jason L. Wright (jason@thought.net)
+.\" 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 ``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 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 May 15, 2022
+.Dt HARMONY 4 hppa
+.Os
+.Sh NAME
+.Nm harmony
+.Nd CS4215/AD1849 audio interface
+.Sh SYNOPSIS
+.Cd "harmony* at gsc?"
+.Cd "audio*   at harmony?"
+.Sh DESCRIPTION
+The
+.Nm
+device uses the
+.Tn Crystal Semiconductor
+.Tn CS4215
+16-Bit Multimedia Audio Codec
+or
+.Tn Analog Devices
+.Tn AD1849
+.Tn SoundPort(R) Stereo Codec
+chip to implement the audio device interface described in
+.Xr audio 4 .
+This device is found on most
+.Tn HP PA-RISC
+workstations.
+The
+.Nm
+has a maximum precision of 16 bits with a maximum 48000 Hz sample rate,
+and has stereo input and stereo output.
+.Pp
+On
+.Tn HP 9000/712
+models
+.Nm
+also provides two additional channels for an add-on
+card with two fax/voice modems.
+.Pp
+One of the hardware registers reflects the state of the
+.Tn CHI
+bus that is used to communicate with the codec and thus
+being sampled at a low accuracy secondary frequency
+(such as
+.Xr timeout 9 )
+produces a poor quality random bit stream that is fed into the
+entropy pool of
+.Xr rnd 4 .
+.Sh MACHINES
+An incomplete list of machines that feature
+.Nm
+audio:
+.Pp
+.Bl -bullet -compact
+.It
+712/*
+.It
+715/*
+.It
+725/*
+.It
+735/*
+.It
+755/*
+.It
+B132L[+], B160L, B180L+
+.It
+C100, C110, C132L, C160[L], C180, C200, C240, C360
+.It
+J200, J210[XC], J280, J282, J2240
+.El
+.Sh SEE ALSO
+.Xr hppa/ioctl 2 ,
+.Xr audio 4 ,
+.Xr hppa/gsc 4 ,
+.Xr hppa/intro 4 ,
+.Xr rnd 4
+.Sh HISTORY
+Support for
+.Nm
+first appeared in
+.Ox 3.3 .
+It was ported to
+.Nx 1.6
+by Chuck Silvers.
+.Sh CAVEATS
+To trigger entropy collection, the
+.Tn CHI
+bus has to be programmed into the data mode that happens once
+a single buffer of data has been played or recorded.