DT Instant Interrupts help

[perides]

Hi...

Working fine now. Thanks for the directions.

I know I don´t need interrupts to just blink a led (and don´t need for most of things). Just to see how it works.

In future I expect this code will read some sensors (pressure, air temp, rpm and a pot), do some calculation and provide near exact extra fuel needed for an aftermarkt turbo charged engine runing at high revs. At this time I think that I´ll need interrups, since in this case, time is critical

... BTW : How many pulses per rev. ???

Don´t know yet... need to check. Using 1 at this time.