Ok I did it!
Here’s how to do this (8100Y version because I don’t have the other one (DON’T EVEN TRY FLASHING THIS IF YOU HAVE DIFFERENT CPU!)):
Please read: I’m not responsible for your bricked minibook or nuclear war started because of it!
You’ll need to dump your original BIOS and replace one module inside. NOTE: this patch was done using BIOS that came with my minibook. Recently CHUWI posted an updated BIOS. The module can be incompatible with it, and I didn’t tested it with updated BIOS so it’s possible that you’ll break your minibook if you updated the BIOS.
To dump the BIOS, you need Intel System Tools. You can find them on win-raid forum. You’ll need the v11 version.
Download the archive and extract it. Go to the “Flash Programming Tool/WIN64” directory. Open CMD window here with administrator privileges (Win+R, type cmd, press ctrl+shift+enter, copy the path to the directory from explorer, in CMD window type cd (cd with space) and click with right mouse button. Path should appear after the cd. Enter.)
then type fptw64 -d bios.bin. Congrats, you’ve dumped the BIOS image! Please keep it somewhere because you’ll need this file if something goes wrong.
Now get the UEFITool. You’ll need the non-NE version. The latest non-NE is 0.26.0.
Open the BIOS image in the program. Find the AMITSE module inside: click Action -> Search, select GUID and paste the B1DA0ADF-4F77-4070-A88E-BFFE1C60529A. click OK. A message will apear that GUID pattern found.... Click it.
Expand the found item until you’ll see PE32 image section. Right click it and select Replace body. Replace the module with this (note: this link will live for 2 weeks, please reupload it because I don’t want to register anywhere)
Then save the modified BIOS image somewhere. Congrats! You now have a patched BIOS. One thing left: flashing.
Get the BIOS archive from this thread. It will contain the archive with BIOS flasher. So you’ll need to make a bootable USB drive as described in the tutorial. In short: extract the archive, extract another archive that was inside the archive (yup, idk why), put everything on your FAT32-formatted USB drive.
Then delete the bios.bin and Startup.nsh from the USB drive. Copy your patched BIOS to the drive and name it bios.bin.
Boot from your USB drive with BIOS. A beautiful EFI shell will appear. Now, to flash the BIOS: AfuEfix64.efi bios.bin /p. After the BIOS is flashed, press ctrl+alt+delete to reboot. That’s all! Check your settings!