Hi Felipe,
thank you for your reply. I have already figured out the way to declare interrupt, yet there is another problem with LPCXpresso or with my coding.
I compiled and successfully run an application under the Keil uVision. Then I ported that application ( mainly interrupt declarations and some startup file tuning ).
When I download the .hex result into my LPC2103 it does absolutely nothing.
Looking for solution I searched the archives and found absolutely no reference designs for 210x controllers.
Perhaps you know where to download such design from?
LPCXpress has some designs, but the closest is for 29xx controller, which does not come even close to 2103
So I still have noclue what I am doing wrog.