Zerocat Chipflasher  v0.4.3 (board-edition-1)
Flash free firmware to BIOS chips, kick the Manageability Engine.
X200 Lan MAC address

Lenovo BIOS

memory locations (hex)

  • b900-b905 (first)
  • 04604f-046054
  • 04634f-046354
  • 04664f-046654
  • 04a34f-04a354
  • ...
  • 5f7000-5f7005 (last and most reliable)

Libreboot

memory locations (hex)

  • 1000-1005
  • 2000-2005

How to read out

In order to read out the Lan MAC address, select Hex-Dump as format using “[t] toggle format”, then use “[m] read random” from the chipflasher’s terminal menu and type in:

  1. first address, i.e. 5f7000
  2. last address, i.e. 5f7005
  3. allow screen feedback with Y

The Lan MAC Address is put on screen and will be written to disk.

Copyright
Copyright (C) 2016, 2017, 2018 Kai Mertens kmx@p.nosp@m.oste.nosp@m.o.net
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled: GNU Free Documentation License
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