Hi,...
I've added a new link to the OpenBIOS homepage. Under http://docs.sun.com:80/ab2/coll.216.2/@Ab2PDFPrint?Ab2Lang=C&Ab2Enc=iso-... you find PDF files describing the FCode engine of Open Firmware. I consider this a valuable information source for all developers who do not have the IEEE 1275-1994 specs (which is unfortunately not freely available)
Regards, Stefan