.\"	$RuOBSD: sf2r.4,v 1.3 2001/10/26 05:38:44 form Exp $
.\"	$OpenBSD: sf2r.4,v 1.8 2002/11/08 08:08:47 mpech Exp $
.\"
.\" Copyright (c) 2001 Vladimir Popov
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\"    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
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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.Dd October 8, 2001
.Dt SF2R 4
.Os
.Sh NAME
.Nm sf2r
.Nd SoundForte RadioLink SF16-FMR2 FM radio device driver
.Sh SYNOPSIS
.Cd "sf2r0   at isa? port 0x384 flags 0x00"
.Cd "radio* at sf2r?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the SF16-FMR2 FM radio tuners.
.Pp
The SF16-FMR2 is a stereo FM tuner that allows to tune in the range
87.5 - 108.0 MHz, report signal status on the current frequency, force
audio output to mono, perform hardware signal search, and has an internal
AFC.
.Pp
The card is based on the TEA5757 chip, see
.Xr radio 4
for details.
.Pp
The SF16-FMR2 cards take only one I/O port.
The I/O port is set by the driver to the value specified in the configuration
file and must be 0x384.
.Pp
The flags control the driver behavior.
For example, with flags 0x01 the driver
will assume that there is a TEA5759 chip is used.
.Pp
MediaForte made two variants of the SF16-FMR2 cards, the first one has
an internal amplifier (PT2254A chip) of the output sound, the second one
does not have such an amplifier.
The current driver supports both variants.
.Sh SEE ALSO
.Xr intro 4 ,
.Xr isa 4 ,
.Xr radio 4 ,
.Xr radio 9
.Sh AUTHORS
The
.Nm
driver was written by
.An Vladimir Popov Aq jumbo@narod.ru
and
.An Maxim Tsyplakov Aq tm@oganer.net .
The man page was written by
.An Vladimir Popov Aq jumbo@narod.ru .
.Sh HISTORY
The
.Nm
device driver appeared in
.Ox 3.0 .