These models require a 3rd party RW_LEGACY firmware to be loaded for Legacy Boot Mode to be functional. ![]() Models with an Atom-based SoC (Baytrail, Braswell, Apollolake) have Legacy Boot Mode capability, but do not ship with a RW_LEGACY/SeaBIOS payload (that part of the firmware is blank). Models with a Core-i based SoC (Haswell, Broadwell, Skylake, KabyLake) mostly ship with a functional Legacy Boot Mode payload updating to a 3rd party build can provide bug fixes and additional features. ![]() SeaBIOS behaves like a traditional BIOS that boots into the MBR of the disk, and from there into standard boot loaders like Syslinux and GRUB. ![]() It is enabled by the SeaBIOS payload of coreboot, the open-source firmware used for all Chrome OS devices (with the exception of the first generation of Chromebooks and a few early ARM models). Legacy Boot Mode has a dedicated firmware region, RW_LEGACY, which is designed to be user-writeable (hence the 'RW' notation) and is completely separate from the ChromeOS portion of the firmware (ie, it is safe to update and cannot brick the device). ![]() For instructions on how to install Arch Linux in a ChromeOS container without having to enable developer mode see Crostini Introduction Legacy Boot ModeĪll recent Intel-based Chrome OS devices (starting with the 2013 Chromebook Pixel) feature a Legacy Boot Mode, designed to allow the user to boot Linux. Note: This article describes how to install Arch Linux by activating developer mode.
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