Sound driver for the National Semiconductor Geode family of chips

Note: You must be root to start this driver.


Direct invocation (also causes a new io-audio process to start):

io-audio -d geode [pci=xx] &

Mounting (requires that io-audio is already running):

mount -Tio-audio [-opci=xx] /lib/dll/ &

Runs on:



pci xx
The PCI index of the card you want to attach to. If this option is not specified, the driver will attempt to find the first unused card in the system.


The shared object is a device driver DLL used by the io-audio manager. It uses the API described in the Audio Developer's Guide.

While is running, you can use applications with sound (e.g. phplay) and those that control the sound-system (e.g. mixer).


Invoke directly from io-audio:

io-audio -d geode &

Mount (io-audio must be running):

mount -Tio-audio /lib/dll/ &

Supports the mixer.


When an error occurs, sends a description of the error to the system logger (see slogger).


You need a current BIOS to run The BIOS VSA (Virtual System Architecture) technology must be sufficiently up-to-date to enable the native audio programming techniques used by this driver. If the BIOS is too old, will exit and slogger will contain the exit message.

See also:

io-audio, mixer, phplay, Audio Developer's Guide.