diff --git a/pc-bios/README b/pc-bios/README
index 162dfe8074f5d38ac8a5284c0ce728ad87ace661..269f1e55a33699c78437ece230c4db052ca0ea57 100644
--- a/pc-bios/README
+++ b/pc-bios/README
@@ -42,7 +42,7 @@
   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 482.
+  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]
diff --git a/pc-bios/openbios-ppc b/pc-bios/openbios-ppc
index 00d9a78eb03bcc47484086308fe69dc5d7110fa2..2b47b1bcb0a6d93233bf94d4e6d9752dd3a20521 100644
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 7c84965b7165bc9cedc4cde0936fe4ab44df9f92..abe8ae71d938f83d50ece056983646c8670dbb40 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 76886f49cd49e63ceec186487b754d6a383ee54c..9d7afb7abdf029408f766000d1823f40033b1174 100644
Binary files a/pc-bios/openbios-sparc64 and b/pc-bios/openbios-sparc64 differ