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SF2R(4) NetBSD Kernel Interfaces Manual SF2R(4)
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by Kimmo Suominen.
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sf2r -- SoundForte RadioLink SF16-FMR2 FM radio device driver
sf2r0 at isa? port 0x384
radio* at sf2r0
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
Philips Semiconductors released two almost identical chips TEA5757 and
TEA5759. The TEA5757 is used in FM-standards in which the local oscilla-
tor 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.
The sf2r device driver appeared in OpenBSD 3.0 and NetBSD 1.6.
The sf2r driver was written by Vladimir Popov and Maxim Tsyplakov. The
man page was written by Vladimir Popov.
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.
NetBSD 10.99 August 25, 2020 NetBSD 10.99