- 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.

- These 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

  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

- These PXE ROMs come from the Joyent fork of iPXE[1]:

    virtio 1af4:1000

  The ROMs are built via sdcboot.git[2] with a few customisations:

  - BANNER_TIMEOUT is set to 0, for the quickest possible boot time
  - PRODUCT_NAME is set to "SmartOS HVM"
  - COMCONSOLE is set to COM1, as COM2 is for metadata in SmartOS

  Once the customisations are applied, each ROM is built like so,
  substituting for the appropriate vendor/product ID:

    gmake -j32 ipxe/src/bin/1af41000.rom

  [1]: https://github.com/joyent/ipxe
  [2]: https://github.com/joyent/sdcboot