- SeaBIOS (bios.bin) is the successor of pc bios.
  See http://www.seabios.org/ for more information.

- The VGA BIOS and the Cirrus VGA BIOS come from the LGPL VGA bios
  project (http://www.nongnu.org/vgabios/).

- The PowerPC Open Hack'Ware Open Firmware Compatible BIOS is
  available at http://perso.magic.fr/l_indien/OpenHackWare/index.htm.

- OpenBIOS (http://www.openbios.org/) is a free (GPL v2) portable
  firmware implementation. The goal is to implement a 100% IEEE
  1275-1994 (referred to as Open Firmware) compliant firmware.
  The included image for PowerPC (for 32 and 64 bit PPC CPUs), Sparc32
  and Sparc64 are built from OpenBIOS SVN revision 1018.

- SLOF (Slimline Open Firmware) is a free IEEE 1275 Open Firmware
  implementation for certain IBM POWER hardware.  The sources are at
  https://github.com/dgibson/SLOF, and the image currently in qemu is
  built from git tag qemu-slof-20110323.

- The PXE roms come from Rom-o-Matic gPXE 0.9.9 with BANNER_TIMEOUT=0

  e1000 8086:100E
  eepro100 8086:1209 (also used for 8086:1229 and 8086:2449)
  ns8390 1050:0940
  pcnet32 1022:2000
  rtl8139 10ec:8139
  virtio 1af4:1000

  http://rom-o-matic.net/

- The S390 zipl loader is an addition to the official IBM s390-tools
  package. That fork is maintained in its own git repository at:
  git://repo.or.cz/s390-tools.git
