Reverse Engineering a ThinkPad Keyboard Controller

HN people cite it as an approachable, hands-on introduction to hardware and firmware reverse engineering, and as the author's own account of the Thinkpad keyboard patch effort.

Hamish Coleman describes reverse engineering the keyboard controller in a Thinkpad and reflashing it with custom firmware. He covers how Lenovo secures its firmware, and his ongoing work on the protocol between the BIOS and the vendor flash tool.