diff --git a/how_to b/how_to
index 762895c..f644995 100644
--- a/how_to
+++ b/how_to
@@ -1215,3 +1215,20 @@ Convert docx to text format in CLI:
     docx2txt <name>.docx
     # Can output markdown
     pandoc <name>.docx -o <name>.md
+
+Flash BIOS using CH341A and SOP8 clip:
+    Hardware setup:
+        /!\ Don't connect USB before everything else is plugged-in correctly
+        /!\ Remove all source of alimentation from the target board (power jack AND battery)
+        Connect clip to EEPROM: red wire is pin 1
+        Connect clip to CH341A: use the SPI/BIOS side of the programmer
+    Reading firmware:
+        sudo pacman -S flashrom
+        # Flashrom list of supported chips: https://www.flashrom.org/Supported_hardware
+        # https://wiki.archlinux.org/title/Flashing_BIOS_from_Linux#Flashrom
+        sudo flashrom --programmer ch341a_spi -r backup1.bin
+        sudo flashrom --programmer ch341a_spi -r backup2.bin
+        # Check we got a correct read
+        cmp backup1.bin backup2.bin
+    Flashing firmware:
+        sudo flashrom --programmer ch341a_spi -w <new_firmware.bin>