Open Firmware is essentially a specification for a largely machine-independent BIOS based on the
standard that is capable of probing and initializing plug-in cards that have on-board IEEE-1275 compliant Fcode in their ROMs. It was invented by MitchBradley
to aid in debugging recalcitrant hardware at Sun. It is found in Sun, IBM,
Sun has now made their implementation
An effort to create an
open firmware exists: the OpenBIOS project -
. While not being completely done, it has successfully booted Linux and MacOS (9 and X).
It also has a theme song (sung by the inventor of
See also: Writing Fcode 2.0 at [
code moved to
As of 2006, the new Intel (x86-64)-based
es use Intel's ExtendedFirmwareInterface
rather than Open Firmware. One was able to give a
owner a harmless but most amusing scare by holding down Command-Option-O-F when booting his computer... (see
Mar 2011 --
"The IEEE-1275 Open Firmware standard was not reaffirmed by the OFWG and has been officially withdrawn by IEEE."
Does this mean the project is essentially dead?
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March 3, 2011
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