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NetBSD 6.1.5 - man page for sf2r (netbsd section 4)

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SF2R(4) 			   BSD Kernel Interfaces Manual 			  SF2R(4)

NAME
     sf2r -- SoundForte RadioLink SF16-FMR2 FM radio device driver

SYNOPSIS
     option RADIO_TEA5759

     sf2r0  at isa? port 0x384
     radio* at sf2r0

DESCRIPTION
     The sf2r driver provides support for the SF16-FMR2 FM radio tuners.

     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.

     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.

     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 RADIO_TEA5759
     changes the algorithm of frequency calculation for the TEA5757 based cards to conform with
     the Japanese standards.

SEE ALSO
     isa(4), radio(4)

HISTORY
     The sf2r device driver appeared in OpenBSD 3.0 and NetBSD 1.6.

AUTHORS
     The sf2r driver was written by Vladimir Popov and Maxim Tsyplakov.  The man page was written
     by Vladimir Popov.

BUGS
     MediaForte made two variants of the SF16-FMR2 cards, the first one has an internal amplifier
     of the output sound, the second one does not have such an amplifier.  The current driver
     supports only the second variant.

BSD					 October 8, 2001				      BSD
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