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rt(4) [netbsd man page]

RT(4)							   BSD Kernel Interfaces Manual 						     RT(4)

rt -- AIMS Lab Radiotrack FM radio device driver SYNOPSIS
rt0 at isa? port 0x20c rt1 at isa? port 0x284 rt2 at isa? port 0x30c rt3 at isa? port 0x384 radio* at rt? DESCRIPTION
The rt driver provides support for the AIMS Lab Radiotrack FM radio tuners and compatible RadioReveal RA300 and SoundForte RadioX SF16-FMI FM radio tuners. The Radiotrack is a stereo FM tuner that allows to tune in the range 87.5 - 108.0 MHz, report signal status on the current frequency, and force audio output to mono. The Radiotrack 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. SEE ALSO
isa(4), radio(4) HISTORY
The rt device driver appeared in OpenBSD 3.0 and NetBSD 1.6. AUTHORS
The rt driver was written by Vladimir Popov and Maxim Tsyplakov. The man page was written by Vladimir Popov. BUGS
Support for the SF16-FMI cards is rather ugly, volume control is not working and the driver can not correctly determine signal state. BSD
October 8, 2001 BSD

Check Out this Related Man Page

GTP(4)							   BSD Kernel Interfaces Manual 						    GTP(4)

gtp -- Gemtek PCI FM radio device SYNOPSIS
gtp* at pci? flags 0x00 radio* at gtp? DESCRIPTION
The gtp driver provides support for the Gemtek PCI and Guillemot MaxiRadio FM2000 FM radio tuners. The Gemtek PCI cards are stereo FM tuners that can tune in the range 87.5 - 108.0 MHz, report signal status and stereo/mono on the current frequency, force audio output to mono, perform hardware signal search, and have an internal AFC. The card is based on the TEA5757 chip; see radio(4) for details. The flags control the driver behavior. For example, with flags 0x01 the driver will assume that a TEA5759 chip is used. SEE ALSO
intro(4), pci(4), radio(4), radio(9) HISTORY
The gtp device driver appeared in OpenBSD 3.2 and subsequently in NetBSD 1.6 wherein it replaced the mr(4) driver. AUTHORS
The gtp driver and the man page was written by Vladimir Popov <>. BUGS
It is impossible to determine which frequency the card is tuned to. Thus, the driver will report an internally stored value even if it is not correct (changed by some program that uses direct port access). BSD
March 26, 2011 BSD
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