@aGeoM :
Today I was brave enough to risk a bricked BIOS and flashed the UBU modded BIOS into the SPI chip of my ASrock X570 Pro4 by using the Flashrom tool.
Result: Success on first try! My PC is still alive!
Here is the proof, that I really have done it:
Tomorrow I will do a backup of the current (updated) BIOS by using the same tool and then compare the original and the updated BIOS.
Thanks again for your support!
Dieter
@Fernando
That is a good news, I am glad to be helpful. The doors are open to take the most of your board. Again credits goes to @TheStilt I just point it out.
Be well Dieter, and happy modding.
Paulo
@Lost_N_BIOS
Here is the dump of my BIOS from HP Z620 via FPTw utility and an error message when I tried to write the dumped bios back.
Thank you a lot.
BIOS_modding.zip (3.7 MB)
@aGeoM :
Hello Paulo,
meanwhile I have dumped the modded BIOS Region of my mainboard and was able to verify, that all BIOS modifications, which were done by the UBU tool, are now effective for my AMD X570 chipset system.
>Here< you can find my related UBU report, which I have addressed to SoniX.
As soon as I have the required time I will try to add a written guide about how to use the Flashrom method to the start post of this thread. That will be the place to give credits to the Flashrom tool makers, to The Stilt and (last but not least) to you. Without you I would never have tried to execute this interesting BIOS flashing and recovering method.
Thanks again!
Dieter
@aGeoM
It would be nice to compile latest flashrom (1.2) for DOS (like the 1.1 version). Do you know anyone being able to do it please ?
Here is the source code : https://github.com/flashrom/flashrom/releases/tag/v1.2
Furthermore the diskcopy.dll what is supposed to do ?
Personally I do not, the only new AMD chipset supported version was The Stilt 1.1 one, maybe asking him if he kindly compile a 1.2 version he will do it. I do not have any experience on compiling, only did it twice a couple years ago when I was on Mining experience, following a step by step guide.
diskcopy.dll is a .DLL file missing on Win10 to allow formatting a bootable USB stick.
Diskcopy.dll is useless if you’re planning to use Rufus, which, indeed, is able to make a proper bootable usb stick, or am I missing something ?
The @The Stilt’s version is the flashrom 1.1 compiled DOS version which supports the eeprom used on AMD chipset motherboards, I was asking (and I’ll ask also him)
for 1.2 due to a wider eeprom support than the old version (1.1).
Anyway I’ve used it on my Rampage V Extreme motherboards and it works like a charm.
Only one thing must be said : flash descriptors region must be set on eeprom to FF (read/write access to the SPI eeprom), while if bios has the "Production Flash Descriptors"
flashrom, like any other flashing tool, will not be able to dump/erase/write any info from/to SPI eeprom.
@Sylar76 :
The file diskcopy.dll is required for the creation of a bootable DOS USB stick. Look >here<.
@Rabanik - Put system to S3 sleep for one minute (be sure it’s one full minute, or more) and then wake it up and try to do the BIOS region flash back again.
If that does not work, you will need flash programmer. I can send you tool that may be able to bypass error 28, but it’s risk to brick your board too so not ideal to try unless you have programmer (in which case, no need to try it)
Or, you can do pinmod as shown at E.1 here - [Guide] Unlock Intel Flash Descriptor Read/Write Access Permissions for SPI Servicing
If you do that, do not reboot or you’ll have to do it again. After that is done, and you boot to windows, dump FD and send to me to edit, or see section B of thread above and edit your FD to unlock all regions per the second spoiler image 1 or 2, whichever matches your FD
Dump FD >> FPTw.exe -desc -d fd.bin
Write modified FD (only possible after pinmod success) >> FPTw.exe -desc -f fdmodified.bin
@aGeoM :
Today I have updated the chapter about ASRock Mainboard BIOSes within start post of this thread.
Can you please have a look into the short guide I have written about the usage of the Flashrom tool and give me your comment?
@Fernando
Looks very good, and simple to understand. Mission completed . 
@Sylar76
Sorry man I was on mobile phone so I just did a kind of rushed replay and have forgotten the MS-DOS USB boot. About compiling flashrom 1.2 I understood quite well what you are asking for, and what I wanted to say was I can not do it as my knowledge resources do not allow me to do it. The only viable way that occurs me is going to the source of the compiled flashrom 1.1, The Stilt. For the ones like me who always have been on AMD side (the Rampage IV extreme on my sig is the only exception because I literally had picked up it from the trash with cpu and managed to bring it to live) know very well all his work on AMD platform in various forms: Win7 OS builds for K15’s cpu, memory straps for several GPU’s, Motherboards/GPUs BIOS mods, applications for reading memory configurations, well… it is countless the support he did and still do for the community without asking nothing in return, saying that I believe if someone ask him to compile flashrom 1.2 he will do it if he have the time for it. But there are a lot of talent people here at Win-Raid forum one of them are 2 posts before mine 
and hopefully they can manage the same.
@Lost_N_BIOS
Hi,
I tried the S3 sleeping mode in Windows 7 and I got the same Error 28. The BIOS has only some S5 mode for enabling…
I also found a service manual with some service jumpers. I described them 1, 2, 3 and 36
jumper number 1 has 3 pins: I tried to set another jumper position and I got the error 28 again. It is some E15 Boot Block recovery header and according to this it should be flash the BIOS from USB stick somehow?
https://h30434.www3.hp.com/t5/Business-P…rd/td-p/5705488
I tried to short jumper number 2 and flashing process ended with an Error 7
I tried to short jumper number 3 and flashing process ended with the Error 28 again
I also tried to short jumpers 2+3 3 and flashing process ended with with the Error 7 again
I tried to change the position jumper 36 and the PC did not start. The power button flashes in red color and I hear beeping
Thank you a lot.
Daniel
@Rabanik - Don’t enable S5, use S3 (leave S5 disabled), and then use “Sleep” button in windows, not Hibernate.
36 only is what you need, put rest in default position. Put jumper on there, reboot twice and then do flash again from windows.
If you cannot get it, then you need flash programmer.
@aGeoM :
According to my recent tests the Flashrom tool may neither need a patched old Rufus version nor the diskcopy.dll file.
I just have done a backup of the meanwhile updated BIOS Region after having created a new bootable USB Flash Drive by using the currently latest unpatched Rufus v3.10 and choosing the option "FREEDOS" instead of "DOS" and it worked!
Look here:
Can you confirm this find?
@LOST_N_BIOS
I disabled S5 mode in BIOS.
I tried to reflash the dumped BIOS back after sleeping mode but I got the Error 7 message again.
So there are only two choices left. Flashing using of jumper 36 or the programator which I do not have.
Tell me please why the dumped BIOS (11 468 600bytes) differs when I compare it with the original one (16 777 216 bytes) downloaded from HP sites? Both versions in my PC or the downloade one are the same latest version J61_0396
And when I successed with flashing after sleeping mode. Which BIOS to modify for NVME support? The dumped or original from HP sites?
Edit:
When I put short the BIOS jumper 36 and rebooted twice and I got during flashing the Error 28 message again 
thank you
procedure to flash tuf x570 gaming plus no work for me
all three
@pipes80 :
The problem is the size (32MB) and the structure of the BIOS.
The only tool I know to be able to get a modded 32MB BIOS properly flashed is the Flashrom one. I am pretty sure, that it will work with 32bit ASUS BIOSes as well.
You can find my guide within the ASRock mainboards section of the start post. You can use it at own risk.
Why do you want to update a freshly released BIOS?
It seams to be working, so less hassle for creating the boot from USB.