Asus bios backup

[dynamic_duo]

Motherboard: ASUS p9x79 ws
Bios Version: 4901
FreeDos/Rufus
Bios CSM ENABLE
Boot security DISABLED

I can't make a backup of the bios with the dos command:

bupdater /oBios.rom

I have the message: The bios backup is not supported due to the security policy


How to ? 

Thanks

[Fern]

use AFU for win/dos/efi for BIOS region

[dynamic_duo]

I couldn't do it with afudos/afuwin..
So I use a ch341q programmer,i was able to dump bios.bin.

Thank you