Lenovo ThinkPad T400

laptop/lenovo/t400 (platform)

Property	Description
Manufacturer	Lenovo
Model	ThinkPad T400
Image	credit to chw.net (http://img63.xooimage.com/files/5/8/9/t400_01-24d34c5.jpg)
Software: User-Facing Environment	Free
Software: Operating System	Free
Software: Bootloader/Recovery	Free
Firmware: Persistent Privileged Code (e.g. x86 SMM)	Free (Coreboot)
Firmware: Late Boot/Payload	Free (SeaBIOS, etc.)
Firmware: Memory Initialization	Free (Coreboot)
Firmware: Early Boot	Free (Coreboot)
Firmware: Boot ROM	Proprietary
Firmware Signing	None
CPU Microcode	Proprietary
Management Coprocessor: Firmware	Proprietary, fully removable (ME Gen1) On ME versions 5 and below (prior to Nehalem), the ME can be entirely disabled with flash descriptor configuration, and its firmware can safely be entirely removed from the flash image.
Communications Coprocessor: Internal Firmware	WLAN proprietary, but card is removable
Communications Coprocessor: Host-Loaded Firmware	Free if stock card replaced with e.g. ath9k
Security Coprocessor: Firmware	Proprietary, but use of it is optional (TPM)
Embedded Controller: Firmware	Proprietary
Hardware: Board Electrical Schematic	Proprietary, but often available online
Hardware: Board PCB Design	Proprietary, but layout often available
Hardware: CPU Instruction Set	Proprietary (x86_64)
Hardware: CPU/SoC Implementation	Proprietary (Intel Penryn)
Hardware: CPU/SoC Synthesis Toolchain	Proprietary

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