Re: IBM HDAPS Someone interested?

[Alejandro Bonilla <abonilla@linuxwireless.org>]

Alejandro Bonilla wrote:

> Pavel Machek wrote:
>
> > Hi!
> >
> > Apple connects their accelerometer over i2c, see:
> >
> > http://www.kernelthread.com/software/ams/
> >
> > For some reverse engineering attempts, see:
> >
> > http://www.paul.sladen.org/thinkpad-r31/accelerometer.html
> >
> > According to IBM, it is *not* enabled during system bootup:
> >
> > http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-53167 
> >
> >
> > According to another text, BIOS know how to test accelerometer in some
> > kind of self test. Aha, here's the most interesting text:
> >
> > http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-53432 
> >
> >
> > According to this text:
> >
> > typical free-fall takes 300msec, but head unloading takes
> > 300-500msec. [So I had my computation right ;-)] ... "therefore, it is
> > too late to start head unloading after detecting free fall"...
> >
> > They really try to detect conditions just before free fall... and it
> > does not sound that difficult.
> >
> > Another clever trick is that if user is still using the mouse, machine
> > is probably not in free fall ;-). In pdf, they also mention few
> > .sys files. They should probably be disassembled to learn how the
> > interface works (hint hint), actually exported symbol names should be
> > quite helpfull in determining what function is the interesting one.
> >                                 Pavel
> >  
Boris,

   Do you know anything about the HD APS? Is it linked to the embedded 
controller?

.Alejandro
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