--- qemu/pc-bios/README	2018/04/24 16:49:53	1.1.1.4
+++ qemu/pc-bios/README	2018/04/24 17:26:43	1.1.1.6
@@ -1,8 +1,35 @@
-- 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.
@@ -14,8 +41,8 @@
 - 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 Sparc32 image is built from SVN revision 183
-  and Sparc64 from SVN revision 181.
+  The included images for Sparc32, Sparc64 and PowerPC (for 32 and 64 bit
+  PPC CPUs) are built from OpenBIOS SVN revision 505.
 
 - The PXE roms come from Rom-o-Matic etherboot 5.4.2.
   pcnet32:pcnet32 -- [0x1022,0x2000]