diff --git a/pc-bios/README b/pc-bios/README
index 9eaa52262..3f2c978bf 100644
--- a/pc-bios/README
+++ b/pc-bios/README
@@ -14,7 +14,7 @@
   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 SVN revision 569.
+  PPC CPUs) are built from OpenBIOS SVN revision 640.
 
 - The PXE roms come from Rom-o-Matic gPXE 0.9.9 with BANNER_TIMEOUT=0
 
diff --git a/pc-bios/openbios-ppc b/pc-bios/openbios-ppc
index 3941c0bf5..9453fbce6 100755
Binary files a/pc-bios/openbios-ppc and b/pc-bios/openbios-ppc differ
diff --git a/pc-bios/openbios-sparc32 b/pc-bios/openbios-sparc32
index 2454b4a2e..afc39668a 100644
Binary files a/pc-bios/openbios-sparc32 and b/pc-bios/openbios-sparc32 differ
diff --git a/pc-bios/openbios-sparc64 b/pc-bios/openbios-sparc64
index 271718123..6b86637e8 100644
Binary files a/pc-bios/openbios-sparc64 and b/pc-bios/openbios-sparc64 differ