Lenovo ThinkPad T420
laptop/lenovo/t420 (platform)
| Property | Description |
|---|---|
| Manufacturer | Lenovo |
| Model | ThinkPad T420 |
| Image | Intel Logo, credit Intel (https://logodownload.org/wp-content/uploads/2014/04/intel-logo-1-1.png) |
| 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 | For ME Only |
| CPU Microcode | Proprietary |
| Management Coprocessor: Firmware | Proprietary, mostly disabled (ME Gen2) On ME versions between 5 and 11 (Nehalem to Broadwell), sometimes called "ME Generation 2", nearly the entire ME image can be removed, leaving only two modules - ROMP and BUP - totaling 90 kB out of a normal 1.5 - 5 MB.
With these modules removed, the ME remains in its BUP state and does not execute its kernel or normal ME functions, leaving it effectively disabled.
The AltMeDisable ("HAP bit") can be used on these MEs. |
| 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 Sandy Bridge) |
| Hardware: CPU/SoC Synthesis Toolchain | Proprietary |
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