Jeff and I wrote a simple SPIN program to compare a GPS 1Hz pulse to the 80M clock cycles of the processor. An off Frequency error shows up as a deviation form the desired 80MHz. A simple subtraction displays the difference.
But then, . . .
I was making a few wiring changes to the protoboard and applied power - An audible Snap, and a faint puff of magic smoke was expelled from under the board, and then the LCD went half black. . . .
I broke it :-(
Now to trouble shoot the problem, but it may take a few days to get some time around this Easter weekend.
For now, My Beacon is OFF-LINE.
An After Thought
Maybe it was just the first Puff, . . . from the Huff-n-Puff working circuit ?
nah, it was real smoke :-)