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+.\" $NetBSD: rtii.4,v 1.5 2002/01/02 02:14:48 wiz Exp $
+.\" $OpenBSD: rtii.4,v 1.2 2001/12/05 11:27:44 mickey Exp $
+.\" $RuOBSD: rtii.4,v 1.3 2001/10/26 05:38:44 form Exp $
+.\"
+.\" Copyright (c) 2001 Vladimir Popov <jumbo@narod.ru>
+.\" 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 October 8, 2001
+.Dt RTII 4
+.Os
+.Sh NAME
+.Nm rtii
+.Nd AIMS Lab Radiotrack II FM radio device driver
+.Sh SYNOPSIS
+.Cd option RADIO_TEA5759
+.Pp
+.Cd "rtii0 at isa? port 0x20c"
+.Cd "rtii1 at isa? port 0x30c"
+.Cd "radio* at rtii0"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the AIMS Lab Radiotrack II FM radio tuners.
+.Pp
+The Radiotrack II 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 Radiotrack II 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 either 0x20c or 0x30c.
+.Pp
+Philips Semiconductors released two almost identical chips TEA5757 and
+TEA5759.
+The TEA5757 is used in FM-standards in which the local oscillator frequency
+is above the radio frequency (e.g. European and American standards).
+The TEA5759 is the version in which the oscillator frequency is below
+the radio frequency (e.g. Japanese standards).
+The option
+.Va RADIO_TEA5759
+changes the algorithm of frequency calculation for the TEA5757 based cards
+to conform with the Japanese standards.
+.Sh SEE ALSO
+.Xr isa 4 ,
+.Xr radio 4
+.Sh HISTORY
+The
+.Nm
+device driver appeared in
+.Ox 3.0
+and
+.Nx 1.6 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by Vladimir Popov and Maxim Tsyplakov.
+The man page was written by Vladimir Popov.