mavb(4) - NetBSD Manual Pages

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MAVB(4)             NetBSD/sgimips Kernel Interfaces Manual            MAVB(4)


NAME

     mavb -- Moosehead A/V Board audio device


SYNOPSIS

     mavb0 at mace0 offset 0x300000 intr 6
     audio* at audiobus?


DESCRIPTION

     The mavb driver provides support for the Moosehead A/V Board found on SGI
     O2 machines.

     The Moosehead A/V Board uses an AD1843 codec that supports 8- and 16-bit
     audio sample recording and playback at rates from 5 to 54 kHz, with 1 Hz
     resolution.  The mavb driver also makes it possible to control the play-
     back volume by using the buttons on the front of the O2.


SEE ALSO

     audio(4), sgimips/intro(4), sgimips/mace(4)


HISTORY

     The mavb driver first appeared in OpenBSD 3.7.  It was later ported to
     NetBSD 5.0.


AUTHORS

     The mavb driver was written by Mark Kettenis, and ported to NetBSD by
     Jared D. McNeill.


CAVEATS

     The analog mixer in the AD1843 codec does not provide a master volume
     control.  Therefore, the O2 volume buttons only control the output volume
     of the DAC.


BUGS

     Currently only sample rates up to 48 kHz are supported.  Recording is not
     implemented yet.  The second DAC on the AD1843 codec sits idle.

NetBSD 10.0                    February 17, 2017                   NetBSD 10.0