OpenBIOS

OpenBIOS is a project aiming to provide free and open source implementations of Open Firmware. It is also the name of such an implementation.

Most of the implementations provided by OpenBIOS rely on additional lower-level firmware for hardware initialization, such as coreboot or Das U-Boot.

Provided implementations

Open Firmware

Open Firmware should not be confused with the IEEE-1275 specification it implements. Open Firmware was released by the company Firmworks. The principal architect of Open Firmware, Mitch Bradley, is chairman of the Open Firmware Working Group and president and founder of Firmworks. The OLPC XO-1 laptop uses the Open Firmware implementation. It supports the x86, PowerPC, ARM architectures, and is released under the terms of a BSD style license.

SmartFirmware

SmartFirmware includes a C to FCode compiler. It is made by CodeGen, Inc. It is written in ANSI C and supports the x86, PowerPC, SPARC, ARM, MIPS architectures.

OpenBOOT

OpenBOOT was released by Sun Microsystems. It supports the sun4v architecture.