Sorry, I guess I should have noted that this routine checks to make sure you don't try to write an address to EEPROM that is >254 or is =0. So, if a user enters "A280" for example, I want that to be invalid. I hope that helps explain my goal?

Just tried it in the sim...
I entered "A300" and it returned with,
"Board received A044
Board address set to 44"

Hopefully you can see what I mean?

Thanks again,
C