SF2R(4) BSD Kernel Interfaces Manual SF2R(4)
sf2r -- SoundForte RadioLink SF16-FMR2 FM radio device
sf2r0 at isa? port 0x384 flags 0x00
radio* at sf2r?
The sf2r driver provides support for the SF16-FMR2 FM radio tuners.
The SF16-FMR2 is a stereo FM tuner that can 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 card is based on the TEA5757 chip; see radio(4) for details.
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
The flags control the driver behavior. For example, with flags 0x01 the
driver will assume that there is a TEA5759 chip.
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 vari-
intro(4), isa(4), radio(4), radio(9)
The sf2r device driver appeared in OpenBSD 3.0.
The sf2r driver was written by Vladimir Popov <email@example.com> and Maxim
Tsyplakov <firstname.lastname@example.org>. The man page was written by Vladimir Popov
BSD April 30, 2017 BSD