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Unfortunately, Intel is using a strange packing, GUID 4A538818-5AE0-4EB2-B2EB-488B23657022 has some volumes and files inside. Maybe another time will have a better look.

Zitat von plutomaniac im Beitrag #5

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Zitat von DoZe im Beitrag #4

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The end is: 0x47EDC (CA)

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Yeah, I suspected that since my extracted image ended with one less byte at the end to make a full 16-byte row. That's why I told you to check another v6 oROM.

As I said, first open the bios with PhoenixTool v2.59 and after everything is dumped, reconstruct it without any change. The hash (SHA-1, md5 etc) should be the same. Otherwise, I don't think you should even attempt such a mod.

If the hash is the same you can proceed with the mod. Find a latter oROM that can fit at 61KB (the exact size of the oROM and maximum available space). Make sure your new oROM has a length of 0xF400 and overwrite 4A538818-5AE0-4EB2-B2EB-488B23657022_254.rom file from 0x38ADD to 0x47EDC. If the length of the new oROM is smaller (doubt it), add some FF padding at the end before CA (0x47EDC).

PhoenixTool has a "No SLIC" option at Advanced Settings. If you select this it won't require any SLIC modification. You may also select to extract all modules from there as it might also extract the oROM directly. But even if it does not, replacing the code via hex is not hard.

Again, before doing any of that make sure that PhoenixTool can properly reconstruct the image.

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hi !

i try to replace the module (and fill it with "FF" before the last "1F" in the module, ("1F" @ 0x47EDC))

but when it's finished, i obtain this error (in nag screen) "Error 9 - L'index se trouve en dehors du tableau"

in phoenix log screen "End count, module (254) at 0 replaced, Module checksums corrected"

and i can't get my final .bio

What's the problem ?

Modification of BIO files is futile, because they have digital signature that will be broken after any modification, but there are no signatures in actual BIOS (unless BootGuard is used, but there is not a case here), so all you need is to dump you BIOS using SPI flasher, modify the dump they way you need and flash it back with the same flasher. Only this way you could achive anything besides "Verification failed".

Checksum can, but those cerfiticates can't:

Ok ! i desolder the eeprom and dump it. Stay tuned...

Like i promise, this is the hard dump on the EEPROM

Checksum by my prommer : 152EADA9

(Winrar 5.21, the eeprom is 25X16VSIG, dump and compare to avoid read error or mismatch)

Neat compression method for DXE volume, needs reverse engeneering to be able to unpack it.

there is a possibility to have a futur version of UEFITooL with Intel particular DXE method ?

i know reverse engineering is a hardwork, but it will be useful for .Bio from intel

Hi,
Is it possible to update Intel nuc mainboards?
Got a D54250WYKH were I'm unable to update the bios.
Regards

EDIT by Fernando (dated 04/22/2015):
Since there are a lot of different threads with the topic "How to mod an Intel mainboard BIOS?", I have merged them all into a new stickied thread.
This may help the Forum visitors to find all topic related advices and solutions (if there are any).