vgabios: Place a signature at offset 0x1e of the rom.

It appears some emulators look for a signature at offset 0x1e of the
option rom.  So, port the signature from the LGPL bios.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

diff --git a/vgasrc/vgaentry.S b/vgasrc/vgaentry.S
index 2dc07c1d811fa9297fb9f1e50cd5e378476d827b..112857b0c91c7318903176ec9493617c17d5a9c0 100644 (file)
--- a/vgasrc/vgaentry.S
+++ b/vgasrc/vgaentry.S
@@ -40,6 +40,10 @@ _rom_header_pcidata:
 #endif
 _rom_header_pnpdata:
         .word 0
+_rom_header_other2:
+        .word 0
+_rom_header_signature:
+        .asciz "IBM"
 
 
 /****************************************************************