No, sorry, that's what I've been trying to say in post 12+14, I've not done any of what you mention there but I know UBU is not used for such things, it's made for replacing CPU microcodes, and BIOS modules such as option roms like SATA rom, LAN Rom etc.

I get a new board Asrock fatal1ty ab350 gaming k4.
But now, there is another Bios chip on it with name
25u12873f I think also 1.8 Volt, may be less(!).
This chip is even worse, not identified by any eprommer, brrr..
I take a look at Macronix chips,
and there I find, it should be something
like mx25u12835f
with chip ID 0xc22538.

I succeed with to read out this chip with eprommer tl866ii plus as "mx25u12835f" .
Then I compare DSDT from Winbond chip 25q128FW with this chip,
and I found only 1 difference :

Name (FHPP, Zero) in Winbond
Name (FHPP, One) in Macronix

Dietmar

@diderius6 Yes, MX25U12873F is 1.8v BIOS - http://www.macronix.com/Lists/Datasheet/...8Mb,%20v1.2.pdf

So if your programmer does not support 1.8v, then you need adapter. Try ASProgrammer software if you can use that with your programmer, if not pickup $2.50 CH341A

I also have a MSI b350 with a mx25u12873f and all i can find for my ch341a program is for 1.8v MX25U12835F. Would it be possible for me and use that setting to flash it? I also found the mx25u12873f option in Asprogrammer but there is no guides on how to flash with it yet.

@Kirj -
For MX25U12835F use ASProgrammer 1.41 and MX25U12835F ID
For MX25U12873F use one in folder of package below named >> CH341A v1.31(1.4) (CH341AFree) >> And, see also, this post about version/method, see end of post #126, (DO do the erase, he already did is why he skipped) - https://www.badcaps.net/forum/showpost.p...5&postcount=126
Choose correct size and type first

I used CH341A v1.31(1.4) (CH341AFree) to program the mx25u12873f chip. It detects different one but it works. Just Erase first then Write, finally Vefify it.
Thank you Lost_N_BIOS.

Does anyone have a modded bios for the asus prime x570 p?