T420-coreboot

I have followed these guides except that i have used at FT232H instead of an raspberrypi for readding and writing the bios to chipset MX25L6406E

• Lenovo T420 Coreboot W/Raspberry Pi
• t420-coreboot-guide

FT232H

Pinnout

FTDI_FT2232H

Name	Color	Test clip pin#	FT232H pin#
/CS	Brown	1	AD3
MISO	Yellow	2	AD1
GND	Black	4	+3.3V
MOSI	Orange	5	AD1
SCLK	Green	6	AD0
VCC	Red	8	GND

Read out the BIOS

flashrom -p ft2232_spi:type=232H -c MX25L6406E/MX25L6408E -r factory1.rom

Write back the compiled BIOS

flashrom -p ft2232_spi:type=232H -c MX25L6406E/MX25L6408E -w coreboot.rom

LIBREBOOT

I looked on this guide below for inspiration, one can't follow it exacly any more ate libreboot project have refactored especialluy the vendor files since this was made. I have used a debian bookworm container on top of a proxmox -> 8 mb or ram, and 15 gb drive, 8 gb is to small

• Installing libreboot on a ThinkPad T420

Download and build the developmet envirement

git clone https://codeberg.org/libreboot/lbmk

Update flash after it have been flashed first time

• How do I "edit grub to add iomem=relaxed"?

sudo flashrom -p internal:boardmismatch=force -c MX25L6406E/MX25L6408E -w coreboot.rom

Tested hardware

• Updated CPU to Intel i7-3632QM and with core boot one can go to ivy bridge
• AX210 Mini Pcie wlan 6E card
• BE200 Mini Pcie wlan 7 card
• ATA Sandisk U100 in the Mini Pcie slot next to ram in the bottom