TODO revision 1.1 
11.1SmycroftThe following parts do not yet work on VR41xx-based systems (such as the
21.1SmycroftIBM WorkPad) as of 20000218:
31.1Smycroft
41.1Smycroft* brightness and contrast buttons
51.1Smycroft* screenblank
61.1Smycroft* power button and battery state detection
71.1Smycroft* Trackpoint (mouse)
81.1Smycroft* audio
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