# ThinkPad R400

It is believed that all or most R400 laptops are compatible. See notes about CPU compatibility for potential incompatibilities.

There are two possible flash chip sizes for the R400: 4MiB (32Mbit) or 8MiB (64Mbit). This can be identified by the type of flash chip below the palmrest: 4MiB is SOIC-8, 8MiB is SOIC-16.

The R400 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it by using a modified descriptor: see gm45_remove_me.html (contains notes, plus instructions)

Flashing instructions can be found at ../install/index.html#flashrom

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The R400 is almost identical to the X200, code-wise. See x200.html.

TODO: put hardware register logs here like on the X200 and T400 page.

Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
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