APM-2, keyboard, etc.

Oleg Gusev oleg@usm.uni-muenchen.de
Thu Mar 4 23:40:26 CET 2004

 some more news for the friends of jornada820 hardware.
 The GPB4 pin is the main battery on/off. I don't understand
 what bits should be set in apm. Look at apm.c in mach-sa1100
 and tell me.
 sa1101-fb seems to be write-only. Bad news for those who
 has 16MB RAM. Giving away 2MB for backing store and
 wasting CPU time for refresh is simply not good.
 The 'sleep' keyboard button generates two-byte code 0x0dff
 instead of the usual  key/0x80+key. Is that the reason for
 hanging ?
 The backup battery and other "HP settings" are accessed
  through the UCB1200 ADC and audio_control_b registers.
 I don't really understand what's going on there, and it
 is minor problem anyway.
 Buggy pcmcia makes me crazy.
 Good night.


PS. Would like to hear about the USB status sometime.

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