--- qemu/pc-bios/README	2018/04/24 16:37:52	1.1
+++ qemu/pc-bios/README	2018/04/24 16:55:28	1.1.1.5
@@ -1,17 +1,51 @@
-- The PC BIOS comes from the Bochs project
-  (http://bochs.sourceforge.net/). A patch from bios.diff was applied.
+- The PC BIOS comes from the Bochs project (http://bochs.sourceforge.net/).
+  The patches in bios-pq have been applied. The binary is based on the revision
+  in bios-pq/HEAD with the patches in bios-pq/series applied.  The git repo
+  that HEAD refers to is located at
+  git://git.kernel.org/pub/scm/virt/bochs/bochs.git
+
+  To build these use the following instructions:
+  using guilt:
+  $ export QEMUSRC=/path/to/qemu/svn
+  $ git clone git://git.kernel.org/pub/scm/virt/bochs/bochs.git
+  $ cd bochs
+  $ git checkout -b qemu-bios $(cat $QEMUSRC/pc-bios/bios-pq/HEAD)
+
+  $ mkdir -p .git/patches
+  $ ln -s $QEMUSRC/pc-bios/bios-pq .git/patches/qemu-bios
+  $ touch .git/patches/qemu-bios/status
+  $ guilt push -a
+  $ ./configure
+  $ cd bios
+  $ make
+  $ cp BIOS-bochs-latest $QEMUSRC/pc-bios/bios.bin
+
+  or alternatively (after the git checkout):
+  $ for p in $(cat $QEMUSRC/pc-bios/bios-pq/series); do git am $p; done
+  $ ./configure
+  $ make bios
 
 - The VGA BIOS and the Cirrus VGA BIOS come from the LGPL VGA bios
-  project (http://www.nongnu.org/vgabios/).
+  project (http://www.nongnu.org/vgabios/).  The binary is based on the revision
+  in vgabios-pq/HEAD with the patches in vgabios-pq/series applied.  The git
+  repo that HEAD refers to is located at
+  git://git.kernel.org/pub/scm/virt/vgabios/vgabios.git
 
 - The PowerPC Open Hack'Ware Open Firmware Compatible BIOS is
   available at http://perso.magic.fr/l_indien/OpenHackWare/index.htm.
 
-- Proll is a GPL'd boot PROM for Sparc JavaStations
-  (http://people.redhat.com/zaitcev/linux/).
-  Applying proll.patch allows circumventing some bugs and enables
-  faster kernel load through a hack.
-
 - video.x is a PowerMac NDRV compatible driver for a VGA frame
   buffer. It comes from the Mac-on-Linux project
   (http://www.maconlinux.org/).
+
+- 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 images for Sparc32, Sparc64 and PowerPC (for 32 and 64 bit
+  PPC CPUs) are built from OpenBIOS 1.0 release (SVN revision 463).
+
+- The PXE roms come from Rom-o-Matic etherboot 5.4.2.
+  pcnet32:pcnet32 -- [0x1022,0x2000]
+  ns8390:winbond940 -- [0x1050,0x0940]
+  rtl8139:rtl8139 -- [0x10ec,0x8139]
+  http://rom-o-matic.net/