My 84 dodge colt 1.4l not turbo... the oil pressure light is coming on

What is your question?

The oil pressure light is coming on after about ten minutes of running. I've replaced the sending unit, cleaned the dip screen, replaced the oil. Afraid it may be the pump. No knocking and lots of oil splashing around when I open tappit cover, so it seems plenty of oil is making it to the top of engine. I dont want the hassle or expense of this repair if i'm just missing something simpler. Thanx