Hi guys, again. Any chance to get some hint? Did anybody here try to patch any B75 mainboard firmware? I'm still interested, if it's possible at all.

@Fernando:
Thank you very much! :)

@Fernando:

Thank you for taking a look once again and sorry, that I didn't write yesterday already, I was off line for a day. Here you have both files:

The original backup:
https://andjelo.de/cloud/index.php/s/bYgJyZtqCFg8CeH

The modified version:
https://andjelo.de/cloud/index.php/s/RLxBMJapkHjAXWR

Just repatched it again, to test, but with no success... :(

Fernando states that the mod is "valid for all Intel/AMD chipset systems with an AMI UEFI BIOS". I've so far been unable to determine if my C600 Intel chipset qualifies. This is a dual processor motherboard with a pair of Intel Xeon E5-2687W (8-core) processors. The current A16 bios, like previous versions, allows a selectable boot list option of either legacy or EUFI.

I have always used the default setting of 'legacy'. If I select EUFI, the boot devices disappear from the menu, and I now have the choice of 'Add Boot Option' or 'Delete Boot Option'. The Add option produced a warning of 'File system not found'. The Delete option does nothing.

I would be delighted if someone else has been able to mod this bios for NVMe and could steer me in the right direction.

@Fernando

Hm, strange, BACKUP.ROM is the one I read from the flash and NVMMOD.ROM is the patched one on top. I'll take a look once again. So far, to your questions:

1) The mainboard is from Acer Veriton M4620G, as far as I know, it is the same as ECS B75H2-M however I can't find any official ROMs for that model. Probably it was OEM only, so I have to stick on what is in the flash IC.
2) I also found another version on Acer forums and also tried that without any success. I'll take a look once again at BACKUP.ROM vs NVMMOD.ROM, not that I mixed the backup and the one from forum as a basis.
3) If you mean patching, I used UEFITool (Linux through wine however), for flashing I used AFUDOS

@Fernando

That is strange, I just tried it once again. As far as I try to insert NVM module into BACKUP.ROM, I'm getting that Pad-file thing. All the DXE-driver parts are in a compressed section, but in your how to, they aren't. Could this be a problem?

P.S. let's assume, that BACKUP.ROM is the latest version of BIOS I have (except someone here knows how to get the ECS version of it).

@Fernando

Yes, this is exactly the one I mentioned. I tried that one also with the same result, however your observation is interesting. I'll try once again to patch this instead of BACKUP.ROM and see what I'll get then. Thank you very much!

@Fernando

Sorry, I suppose, I was a little bit confusing. You are absolutely right, my BACKUP.ROM has different structure from the one you've sent, because the one is the original from the flash and the other is from the forum. However, by "the one I mentioned" I meant, that this BIOS which you found, is the very same one, which I also found on that forum and I tried the NVM modification on that also. It seemed not to work there either, or better to say, I see no difference in the BIOS settings regarding NVM. Anyway, I'll try to redo the modification on the BIOS you've found once again. May be I was blind or just stupid :)