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AZ(4) NetBSD Kernel Interfaces Manual AZ(4)
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az -- Aztech/PackardBell radio card device driver
az0 at isa? port 0x350
az1 at isa? port 0x358
radio* at az?
The az driver provides support for the Aztech/PackardBell radio cards.
The Aztech/PackardBell cards are stereo FM tuners that allow tuning 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 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.
The az device driver appeared in OpenBSD 3.0 and NetBSD 1.6.
The az driver was written by Vladimir Popov and Maxim Tsyplakov. The man
page was written by Vladimir Popov.
It is impossible to determine to which frequency the card is tuned.
Thus, the driver will report an internally stored value even if it is not
correct (changed by some program that uses direct port access).
NetBSD 9.1 August 31, 2018 NetBSD 9.1