@ -7,11 +7,13 @@ This document describes known methods of flashing BIOS on xx20 and xx30 series o
- [Requirements](#requirements)
- [BIOS versions](#bios-versions)
- [Downgrading BIOS](#downgrading-bios)
- [Creating a backup](#creating-a-backup)
- [Examining and removing protections](#examining-and-removing-protections)
- [Theory](#theory)
- [Practice](#practice)
- [SandyBridge series (X220, T420, etc.): WIP](#sandybridge-series-x220-t420-etc-wip)
- [Troubleshooting](#troubleshooting)
- [Flashing the backup back](#flashing-the-backup-back)
- [Credits](#credits)
# IvyBridge series (X230, T430, etc.)
@ -39,7 +41,7 @@ Below is a list of BIOS versions that are vulnerable enough for our goals, per m
**T530**: 2.60<br>
**W530**: 2.58
If your BIOS version is equal or lower, skip to the **[Examining and removing protections](#examining-and-removing-protections)** section. If not, go through the downgrade process, described next.
If your BIOS version is equal or lower, skip to the **[Creating a backup](#creating-a-backup)** section. If not, go through the downgrade process, described next.
## Downgrading BIOS
@ -109,6 +111,15 @@ Boot from the USB drive (press F12 to select boot device), and BIOS flashing pro
It may reboot a couple of times in the process. Do not interrupt it.
## Creating a backup
You should create a backup of the `bios` region. Then, in case something goes wrong, you'll be able to just flash it back externally.
The `me` region is locked, so an attempt to create a full backup will end with a `Transaction error!`. But you still can back up the `bios`: