Detecting hardware

[Bill Kirby]

Is there a way to detect the IIIx vs the V?  They both
run PalmOS 3.1 on the EZ chip, but the IIIx doesn't use
the software controllable contrast.  I'm working on a dialog 
to allow the user to adjust grey-levels and contrast 
(if on the V).  I'd like to disable my contrast control in
this dialog, if it is run on a IIIx.

Any ideas?

--
Bill Kirby