Desenvolver um Software

The project Consist in integrate in my existing pic16f628a program a external magreader The mag reader is a t/l interface , they need to be interpretated and output using the existing ps2 output the pic have 18 pins and actually im using 12 so i have 6 pins free to read the 3 tracks using the 6 wires so if u think u have the ability to adapt your code to mine please contact me In resume i need interpretate a ttl signal from a external magnetic card reader and output this data using the existing ps2 interface