I'm still trying to figure out how to get this to work. I think undersand the concept of the Microchip AN, but I am having a little difficulty implementing it.

This is my understanding, basically you have two timers WDT and TMR0. TMR is based on a temperature compensated crystal (in my case a temperature compensated INTOSC) and WDT is based on a non temperature compensated RC.

A prescaler in the code is setup so that timer TMR0 rolls over multiple times before the WDT rolls over. By counting the number of times TMR0 rolls over in a WDT period an inference on the temperature can be made.

The confusion I am having is how to setup the WDT correctly. How do I setup the WDT up so that it rolls over without reseting the pic, and how do I tell that the WDT rollover has occured. Since it may matter I am using a 12F675 for this project. I assume I set the pic fuse to not use the WDT to reset the pic, but I am not sure how to use it in my code.

I think I am missing one minor piece and I will be able to get this to work.

Thanks for any help