Microcontroladores - MATRIX KEYPAD WITH PIC16F84A EMSSAMBLER

HI PEOPLE, I WAS TRYING TO PROGRAM A PIC16F84A TO CONTROL A KEYPAD OF 4X4 BUT I DON'T KNOW HOW TO MAKE IT IN EMSSAMBLER AN I REALLY NEED IT, AND TO ME IS REALLY HARD TO UNDERSTAND THIS PROGRAMMING LANGUAGE, I'LL APPRECIATE IF SOMEONE WOULD LIKE TO HELP ME!!!!