Remote Vehicle Starter Help

[Art]

Now, I can measure any number of signals simultaneously - on any pin

How, if there's only one interrupt pin (RB0), do the newer pics have more, or is there a trick?

I'm up to this:


& would like to do a tachometer if it could be done on the same chip.
Maybe a way to cause the input for every pin pulse RB0, and then check the status of other pins..