diff -r e2f36d066b7b tools/firmware/rombios/rombios.c
--- a/tools/firmware/rombios/rombios.c	Mon Dec 22 13:48:40 2008 +0000
+++ b/tools/firmware/rombios/rombios.c	Thu Dec 25 11:03:12 2008 +0900
@@ -11019,7 +11019,9 @@
 
   mov  cx, #0xc800  ;; init option roms
   mov  ax, #0xe000
+  call _enable_rom_write_access
   call rom_scan
+  call _disable_rom_write_access
 
 #if BX_ELTORITO_BOOT
   call _interactive_bootkey