Well, at least enough to get some LEDs blinking with Assembly Code. Following an older (2007 I think) book, I was able to get some basic things happening with MPLAB 8.90 several months ago. Try as I may, I couldn't get ANYTHING happening with MPLAB X. Over the holidays I decided to watch videos, read Application Notes, and play until I could get functional. Played with a PIC12F1822 and PIC18F13K22. Tried to do something with the PIC18F26K42, but kept getting errors. There are template (TEMPO.ASM) examples for select MCUs, mostly older ones. Apparently there is something different about the K42 where the K22 TEMPO doesn't work. I did notice the overall format was different between the 12F and 18F. Next I want to learn the nuts & bolts of C code, again, at least enough to be skeletally functional.