Hi Adam,

how you detect, that the interrupt was executed ?
Maybe the fault occur on this place.

Also you select never the transition interrupt mode. The reset state was always the level activated interrupt mode.

Maybe you should read again the data sheet about interrupts. Since there are lots of useless instructions (EX0 = 0; EX0 = 1;) inside your code example. The first IE = 0x83; was already sufficient.


Peter