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

NAME
     ich - Intel 82801AA/AB and 440MX PCI audio driver

SYNOPSIS
     ich* at pci? dev ? function ?
     audio* at ich?

DESCRIPTION
     The ich driver provides support for the AC97-based audio present on the
     Intel 82801AA/AB I/O controller hub and 82440MX chipset.  The ich DMA en-
     gine 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.

SEE ALSO
     ac97(4), audio(4), mixer(4)

HISTORY
     The ich device driver appeared in OpenBSD 2.8.

BUGS
     This chipset supports only 48KHz rate for both DAC and ADC operation, un-
     fortunately some audio applications have poor support for this rate and
     mpg123 is one of those cases.

OpenBSD 2.8                      May 30, 2000                                1
