Lpc2000

Hi

I have a board that can work with either an LPC2119 or an LPC2129. I 
want the flexibility so that I'm not just locked in to one part or 
the other. For most things, I can treat these identically, but I'd 
like to know if there is a way to identify the LPC2119 vs the LPC2129 
at runtime.

Thanx