aps man page on OpenBSD

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APS(4)			  OpenBSD Programmer's Manual			APS(4)

     aps - ThinkPad Active Protection System accelerometer

     aps0 at isa? port 0x1600

     The aps driver provides support for several sensors found in some
     ThinkPad laptops.

     The sensors currently exposed via the sysctl(8) interface are:

	   Sensor	       Units	Typical Use
	   X_ACCEL	       Unknown	X Acceleration
	   Y_ACCEL	       Unknown	Y Acceleration
	   X_VAR	       Unknown	Weighted X Acceleration?
	   Y_VAR	       Unknown	Weighted Y Acceleration?
	   Temp1	       uK	Unknown
	   Temp2	       uK	Unknown
	   Keyboard Active     boolean	Keyboard activity
	   Mouse Active	       boolean	Mouse activity
	   Lid Open	       boolean	Lid state

     isa(4), sensorsd(8), sysctl(8)

     The aps driver first appeared in OpenBSD 3.8.

     The aps driver was written by Jonathan Gray <jsg@openbsd.org>.

     The aps driver does not yet maintain state and subsequently does not take
     evasive action when it thinks the hard drive is in danger.

     The Y axis on X40 and possibly other models seems to be inverted.	It is
     unknown how to distinguish between different versions of the
     accelerometer to compensate for this in the driver at this time.

     As IBM provides no documentation, it is not known what all the available
     sensors are used for.

OpenBSD 4.9		       December 23, 2007		   OpenBSD 4.9

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