long countdown timer, how to save power?

[skimask]

Any idea what Darrel was talking about when he was saying it could be done without using an interrupt?

I think what he was talking about is that you can use the WDT to wake up the PIC here and there and check the interrupt flag bits for Timer1 manually rather than have Timer1 provide the wakeup. Then reset the interrupt flag bits and go back to sleep.