This firmware is licenced under the KOS licence - a modified form of the BSD licence (for details see http://gamedev.allusion.net/softprj/kos/faq.php). It is fully and freely distributable provided the following notice is preserved somewhere in the code: Copyright (c) Dan Potter 2000. The code this firmware was built with is part of the KOS distribution and can also be reviewed here: http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/