Flashing BIOS With Raspberry Pi and flashrom

Today I am going to demonstrate how to flash your BIOS Chip with a Raspberry Pi and a program called flashrom



I was trying to edit my BIOS that day on my laptop so that I can get the Franxx boot logo in Darling in the Franxx, seen here

After flashing the modded BIOS, which was probably uncorrectly modded, my laptop won’t post anymore, it doesn’t even boot to the Fn+B recovery page, so I panicked a bit and contacted Metabox Support, the only thing that they can do is probably replace the BIOS chip for me which will occur a charge because I have soldered a 3G module connector on to the motherboard so that I can get 3G.

So I searched around my home to find any possible flashing tool, the only thing I can find was my Arduino and my Raspberry Pi.

Here we go!


Please carefully wire your BIOS Chip to your Raspberry Pi according to the diagram below, errors in wiring might fry your Pi or your BIOS Chip.

Installation / Compilation

There are 2 ways to install flashrom, either by compiling or from repository. I personally prefer compiling since you’ll always get the latest version.


If you want to go with the easy way, please install flashrom with

sudo apt update && sudo apt install flashrom -y


To compile flashrom, firstly you have to install its dependencies.

sudo apt install git libpci-dev libusb-1.0 libusb-dev -y

Afterwards you will need to clone the flashrom Repository

git clone https://github.com/flashrom/flashrom -b 1.0.x

Then compile flashrom with

make -j4

Install the compiled binary with

sudo make install

Flashing the chip

Firstly confirm that your Raspberry Pi had successfully detected your chip with

flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=2048

It should return with your chip’s name, however, if your chip is not support, it likely will return as a generic SPI Flash chip, you can still flash it.
However, if it returned as no chip found, check your wiring

Backup the content of your chip

flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=2048 -r backup.bin

Your original firmware will be backed up to a file named backup.bin, flash the file back in an emergency.

Flash the new ROM

flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=2048 -w BIOS_mod.bin

Disconnect the Pi and test whether the new BIOS works or not.

Please do NOT power on your PC or peripherals when your Pi is still connected, it will probably fry the Pi.


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