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AZ(4)                    BSD Kernel Interfaces Manual                    AZ(4)

NAME
     az -- Aztech/PackardBell FM radio device

SYNOPSIS
     az0   at isa? port 0x350
     az1   at isa? port 0x358
     radio* at az?

DESCRIPTION
     The az driver provides support for the Aztech/PackardBell radio cards.

     The Aztech/PackardBell cards are stereo FM tuners that can tune in the
     87.5-108.0 MHz range.  They are capable of reporting signal status
     (tuned/not tuned, stereo/mono signal) and forcing audio output to mono.

     The card is based on the LM7001 chip; see radio(4) for details.

     The Aztech cards use only one I/O port.  The I/O port is set by the
     driver to the value specified in the configuration file.  The I/O port
     must be one of 0x350 and 0x358.

SEE ALSO
     intro(4), isa(4), radio(4), radio(9)

HISTORY
     The az device driver appeared in OpenBSD 3.0.

AUTHORS
     The az 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>.

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 24, 2017                             BSD