BIOS modding a Dell XPS 9350 help

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

Hello.

I’m trying to mod a Dell XPS 9350 BIOS for greater accessibility but im lost at creating the new BIOS file.
My goal is to
1. Update some EFI regions(intel GOP driver) with UBU
2. Gain access to advanced options with AMIBCP

this is what I got so far:
Made a Backup of the current BIOS with SPI programmer (TL866CS)
EXtracted the HDR file from Dell ( https://downloads.dell.com/FOLDER0542923…9350_1.10.1.exe )
seperated the HDR into regions/sections using PFSExtractor

Where do I assemble into the final BIN file again, with UEFI Tool, intel FIT ?
and is there any info from the DUMP I need ?
the DUMP i made seems hard to work with, UEFI tool reports:

parseIntelImage: SPI flash with unknown JEDEC ID FFFFFF found in VSCC table
parseVolumeHeader: volume header checksum is invalid
parse: not a single Volume Top File is found, the image may be corrupted

maybe its a broken DUMP. in case anyone want to investigate i have attached it.
this is my frist time trying to modfiying a dell BIOS :slight_smile:

Regards
Mikkel

XPS_9350_DUMP.rar (5.61 MB)

2

After i extracted the ME and BIOS Region from my dump, i tried to read them with UBU, ME analyzer and intel FIT.
None of them want to work with my dump.

if i decide to use the ME and BIOS region from the extracted HDR, will i loose data like, service tag, OEM strings etc. etc. ?

3

i was able to pull the BIOS and descriptor REGION with FPT.
but im still missing the ME region. also tried to make a new DUMP, same result, data cant be read properly :frowning: