Thanks for all the suggestions. Using the comparator or the MC34064 both are great ideas, but wouldn't the just keep reseting? What I mean is applying the 9V battery to the input of the LP2950 5V regulator, and the powering the processor with the regulator having the MC34064 or the the processor on power up, code would start, compare the 9v battery is it above 6.2v or whatever if so, continue program, if not well, turn off a FET or transistor that would be in series with the 9v positive lead or ground leg, then once that happen let's see, wouldn't it start up again and do the same thing continuously?

Thanks again.