UEFI BIOS T420 BIOS Structure
Aus ThinkPad-Wiki
T420 SPI Flash Structure
It seems like the T420 BIOS update file (.FL1) is not an UEFI capsule as found for the Edge S430.
This page describes work in progress.
Structure of a Dump of the T420 SPI Flash
This is the output of the UEFITool for a dump of a T420 SPI Flash:
The SPI flash of the T420 has a size of 8MByte with this structure:
| Offset | Length | Description |
|---|---|---|
| 0x0 | 0x1000 | descriptor region |
| 0x1000 | 0x2000 | GbE region |
| 0x3000 | 0x4d0000 | Intel ME region |
| 0x500000 | 0x300000 | BIOS region |
