Ok it appears that everybody except Andrew Warren (thanks andy) has got the wrong side of the question. "Trying to increment the RTCC via RA4 did'nt work." It has nothing to do with not pushing the w reg or any other reg onto a software stack and popping them off afterwards.Simply because it did'nt even get close to causing an interupt because the RTCC was'nt being increment towards overflowing to 00H.