Andy,

I realize that there is no standard way. I was simply warning Ralph against wasting his time trying to find out exactly what my wiring was based on the numbers I have in the code.

It's a lot more efficient to simply do the wiring and come up with appropriate numbers based on that wiring. That's what I did at least.

Since this is such a short program, I will document everything neatly once it is complete. Also, since my question regarding my code on this forum did not really have to do with the 7-segment displays but rather with the odd-number problem and, now, interrupts, I didn't think anybody would care to read comments about how I handled the SSD's.