I am new to using interrupts and have never even attempted to work with them before. I have explored many examples on the net, but I have not been able to come across anything that gives a good explanation just yet. I think I am beginning to understand the vector table and how to call and assign them, but I was wondering if anyone knew any good references or had some good advice for starting off with them. I am working with codewarrior and I am trying to programs interrupts for a MK 4x4 keypad combined with the MC9S12DG128 uC. Thank you so much for anything you may be able to contribute!