ok i ordered SPI flasher and after it arrives i will try to reflash again (it will be interesting if i can crossflash bios from different motherboard like Z370 prime-a as they did with asus hero IX to asus hero X)

its actually really hard to find any info about flashing ASUS Z2xx/Z3xx motherboards or which pin should be connected in order unlock FD is there any good source about that? until now i was able to google just these 2 chinese pictures which are pretty close to what i can observe on my motherboard but i have little different BIOS chip (W25Q128FVSQ)

another way to flash descriptor and me via ME Operation Mode (Temporary Disabled)，https://github.com/corna/me_cleaner/issues/214
you can try it

unfortunatelly i dont have that option inside my bios :-(
ASUS PRIME Z270-A bios version 1302

i will just do it with SPI flasher i also want to test to flash different bios into this MB (from Z370-A)

EDIT: actually i was able to update ME with MEupdatetool from ASUS so now i have version 11.8.55.3510

so there is way how to flash that part of region...
I combined 2 MEtools together in order to do this :D

MEUpdateTool_11.8.55.3510 - for Z270-P
and
MEUpdateTool_UI_20171103_TP - for Z270-A which is much older



just curious if this can answer something..
ftp://ftp.micro-square.nl/Drivers/Mainbo...WUpdateSample.c

@AlurianNighthawk - see repliy by @svarmod here, in reply to my comment at end of page before this, saying FD re-write was not needed - It is if you change SKU! - [GUIDE] Coffee Lake CPUs on Skylake and Kaby Lake motherboards (45)

@oneb1t - once you have programmer, unlock FD is easy, edit the BIOS before you flash per this guide, see section "B" second spoiler, then image two for this board probably (Lines 80-90 if they look similar, if not use image one line 60, but I bet its 80-90)
[Guide] Unlock Intel Flash Descriptor Read/Write Access Permissions for SPI Servicing

i found raspberry pi 3 b which i will use as SPI flasher :)
so today i will try to flash it

EDIT: just flashed with SPI (raspberry pi 3 b worked like charm)
i will write details later but now i want to try to crossflash MB into Z370 O.o

@oneb1t
Do not forget about TPU modules!

ok now im not that brave.. :D so i will need to do some research about these modules and what they can do
(i expected that they are loaded on every start of computer so you cannot really brick anything if you flash incorrect TPU module, but if they stick over BIOS reflash then i need to reconsider)

maybe i will just try to crossflash into another Z270 which should be still possible :)

downgrade me
E98D33CD-1AEB-46B1-A4B6-0BB4CC655C26 -Replace body PE Image with same guid from original bios
BC327DBD-B982-4F55-9F79-056AD7E987C5 -Replace body PE Image with same guid from original bios
611F7FDD-C7C6-4CFE-8072-2155D7B25A80 -Replace raw section with same guid from original bios
remove GUID 63F23E9D-5FDA-415E-9C2A-64C4E2A6ECE8
remove list iROG
iROG1: GUID 38715E0A-ECD3-4776-8AC4-7D93510A7468
iROG2: GUID 475EB5AF-16F2-4727-BD69-0D1BF383196C
iROG3: GUID DE9A07DF-B1C6-448B-B700-715F6BE6676D

@svarmod Thanks for heads up. Do you think that applies still when using programmer, since regular flash routine is not run by the board, maybe on startup it could flash over the TPU FW, or maybe that only happen if using regular flash method (USB Flashback)?
Thanks for adding GUID info on that @revlaay

Hey . What do you think about the MSI Z 170 a pro? . Is there an opportunity to put i5 9600k and what steps do I need to take. Thx for answer

@Lost_N_Bios - That was exactly the question i also wanted to ask

now im running on Z270 1302 with FD unlocked and coffe lake mod
Also can i now use AFUDOS to flash entire bios with FD region when its unlocked or every time i want to do that i need to use SPI flasher?

I wouldn't advise to use internal flash tools.
Yes, unlock FD and ME with SPI once and you will can use FPT/AFU for every next reflashing. Just keep every new bios unlocked too to not repeat unlock actions again.

sure i understand that
but its just easier for me to use AFU then attach all the wiring again...

You only need to flash via Programmer once, unlock the FD and then it will always be unlocked so you can use FPT instead of AFU, just be sure as svarmod mentioned to edit the FD in any BIOS you reflash via FPT if you reflash entire BIOS instead of using -me or -bios region switches

Still wanting to know what I asked above @svarmod - do you know for sure if it's necessary to watch those modules, edit/remove/swap, when using programmer too? Does this TPU update get applied on board starting, to possibly mess it up if you don't do that, or does that only happen during flash update procedures

@Lost_N_BIOS
TPU firmware comparison happens every time when board starts, not when flashing. If it fails board hungs on update procedure and next bios reflashing not more helps. The decision for unbricking - is directly reflashing TPU chip.