The diagnostic wrapper phase (magenta fill, 3-blink train, 5 s hold) is removed; the shim keeps only the load-bearing display revival (OVL_EN, OVL0_2L_EN, backlight GPIOs) and the patched branch to U-Boot. U-BOOT.md documents the boot chain, payload layout constants, build/flash/verify commands, recovery and the U-Boot tree state. U-Boot was rebuilt with the user's hand-tuned .config (16x32 font, CONFIG_CHROMEOS) without re-running the defconfig.
646 KiB
646 KiB