APM-2, keyboard, etc.
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
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.
PS. Would like to hear about the USB status sometime.
More information about the Jornada820