Use OpenBIOS for g3bw machine

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6128 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 698e0d5..7156b2d 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -2328,6 +2328,11 @@
 QEMU uses the Open Hack'Ware Open Firmware Compatible BIOS available at
 @url{http://perso.magic.fr/l_indien/OpenHackWare/index.htm}.
 
+Since version 0.9.1, QEMU uses OpenBIOS @url{http://www.openbios.org/}
+for the g3bw PowerMac machine. OpenBIOS 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.
+
 @c man begin OPTIONS
 
 The following options are specific to the PowerPC emulation: