AUICH(4)                  OpenBSD Programmer's Manual                 AUICH(4)

NAME
     auich - Intel ICH integrated AC'97 audio device

SYNOPSIS
     auich* at pci? flags 0x0000
     audio* at auich?

DESCRIPTION
     The auich driver provides support for the integrated AC'97 audio con-
     troller present on the Intel ICH I/O controller hub and compatible
     chipsets.

     Supported chipsets:

           o   AMD 768, 8111
           o   Intel 6300ESB/6321ESB
           o   Intel 82440MX
           o   Intel 82801 (ICH, ICH0, ICH2, ICH3, ICH4, ICH5, ICH6, ICH7)
           o   NVIDIA nForce, nForce2, nForce3, nForce4
           o   SiS 7012

     The auich DMA engine supports full-duplex operation and has separate
     channels for line input and microphone.  Unfortunately, simultaneous
     recording from both line and microphone inputs is not supported due to
     the current ac97(4) design.  Setting flags to 0x0001 will compensate for
     machines that have reversed stereo.

SEE ALSO
     ac97(4), audio(4), intro(4), pci(4)

HISTORY
     The auich device driver appeared in OpenBSD 2.8.

CAVEATS
     Some hardware implementations only support 48kHz sampling rates.

OpenBSD 4.7                    February 25, 2010                             1
