MirBSD manpage: rt(4)
RT(4) BSD Programmer's Manual RT(4)
rt - AIMS Lab Radiotrack FM radio device driver
rt0 at isa? port 0x30c
rt1 at isa? port 0x20c
rt* at isapnp?
radio* at rt?
The rt driver provides support for the AIMS Lab Radiotrack FM radio
tuners and compatible - RadioReveal RA300 FM radio tuners and tuners at
SoundForte RadioX SF16-FMI (Creative ViBRA16C PnP).
The Radiotrack is a stereo FM tuner that can tune in the range 87.5 -
108.0 MHz, report signal status on the current frequency, and force audio
output to mono.
The card is based on the LM7000 chip; see radio(4) for details.
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 ei-
ther 0x20c or 0x30c.
intro(4), isa(4), isapnp(4), radio(4), radio(9)
The rt device driver appeared in OpenBSD 3.0.
The rt driver was written by Vladimir Popov <jumbo@narod.ru> and
Maxim Tsyplakov <tm@oganer.net>. The man page was written by
Vladimir Popov <jumbo@narod.ru>.
Support for the SF16-FMI cards is rather ugly, the driver can not deter-
mine signal state and force audio output to mono.
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 (e.g. tuning was done through the direct I/O access).
MirBSD #10-current October 8, 2001 1