Re: [PATCH] Heartbeat LED for iBook

There is some minimal documentation available. Some Apple docs:

ADB-The Untold Story: Space Aliens Ate My Mouse
http://developer.apple.com/technotes/hw/hw_01.html

Inside Macintosh: Devices / Chapter 5 - ADB Manager
http://developer.apple.com/documentation/mac/Devices/Devices-203.html

These will tell you the basic design of ADB as well as the packet
formats and information about keyboards and mice.

Note that these document ADB in a generic sense, so nothing PMU
specific is in them. Apple has been very reluctant to document
the PMU and it's functions.

ADB has nothing to do with the PMU (well, the PMU emulates an ADB
device, sort of).

The Linux kernel multiplexes the /dev/adb device to also serve as
a channel to the PMU, though.  This ugliness should be fixed, some
day...


Segher