1989 Chevy Caprice PROM chip

I have the above mention car. I was driving down the road and the car lost power and stalled out. When tried to restart, it would not start but would turn over. I replaced the ignition coil, ignition module and it still want start but turn over. I also took out the #1 plug to see if I was getting a spark and no fire to the plugs. I also tested the wires from the coil and module and get less than a 1/2 volt reading. What could be my problem 1. Bad PROM chip, if so, how can you test the PROM chip.

Look forward to hearing from you