Re[2]: [iPAQ] Multiple keypresses on iPAQ and compressed FS

On Sun, 24 Feb 2002 11:46:01 -0400 (AST) James MacLean <macleajb@EDnet.NS.CA> wrote:

> On Sat, 23 Feb 2002, Christian, Andrew wrote:
>
> > iPAQ models 3100/3600/3700 can only read a single keypress at a time
> > (from the keys on the bottom of the iPAQ) due to a hardware limitation.
> > The 3800 does not have this limitation.
> >
> > - Andrew
>
> Other than buying a 38xx, is there any ideas for how to make them
> useable
> for games? I know its probably a low priority, but my children like that
> ability :). Rayman under windows had touchscreen buttons... Maybe that's
> the angle?
>
> JES

It's not entirely true that the iPAQ can only see one button at a time...
just mostly true.

Most of the buttons on the iPAQ are a set of switches and resistors
connected to an A/D converter. When a button is pressed, the voltage
changes, and the iPAQ works out which button was pressed.

There are a couple of exceptions however. The D-Pad centre button, and the
Power button are both connected independently, and can be chorded with any
other button(s). The Power button is under software control, and can be set
to either turn the iPAQ off, or act as a normal keystroke. Aditionally,
the touchscreen can be tapped as a button if really needed.

Keys for Doom.
Up -> Up
Down -> Down
Left -> Left
Right -> Right
Strafe -> D-Pad Centre
Fire -> Power Button..

You can run... you can dodge bullets and you can shoot... what more could
you ask for ;)

Jim
Received on Sun Feb 24 12:58:17 2002