(UEFI) Dell XPS 15z L511z modded BIOS - and HOWTO

[ucupsz]

for an update,
1. i've changed the flash descriptor into FF FF using hardware flash programmer.
confirm the changes using "fpt -i" command.
Also successfully dump the ME section using "fpt -ME -d myME.rom".
previously, can't dump ME part with previous flash descriptor setting.
2. failed when tried to flash the bios part using "fpt -BIOS -f bios.rom"
bios.rom is the one that i modified.
the error is:
"error 28: Protected Range registers are currently set by BIOS, preventing flash access. please contact... bla..bla..bla.."
i tried in both windows environment and DOS (bootdisk).
still hardware based solution for T430 then...

hello kasar and all,
i've read couple pages back of this thread. interesting hack

I had lenovo T430. i can not flash modified bios using intel fpt.
when i tried to back-up, it gives error 26:
(Error 26: The host CPU does not have read access to the target flash area. To en
able read access for this operation you must modify the descriptor settings to g
ive host access to this region.)

do you think that modifiying flash descriptor will help me to be able to flash using intel fpt?

yes, that error is caused due a locked descriptor settings.

to overide the lock you have some options.

* MESET.exe
* ME_PORT.exe
* prr2.exe

those apps bypass the protection by software on many computers, but not work on all, it works on a DOS environment, so you would need a DOS bootable usb , cd floppy, etc and run it from there, then without restart, you would need also a fpt.exe (dos version) and the file to be flashed (anyway I would made a backup from the whole chip before backup anything)

other options are hardware options.

you can do the descriptor bypass by shorting the two pins asked before at this topic.

or going to the hardway and reprogram the chip externally like I did to remove the lock.

give also a look to this topic

http://forum.techinferno.com/general-not...ptops.html