@jremington Good to know. I just looked up the SoftwareSerial library and its associated code - I will definitely go that route, going forward. Thanks for the tips! A huge, huge help!!
@Whandall Not much 6502 experience, at all. I've always wanted to learn Assembly, even in college. Unfortunately my college sucked and we barely did any programming, even as a Comp Sci major. I found Ben Eater on YouTube and started with his videos to make a CPU from scratch. After messing around with that, I moved onto his videos about the 6502 hardware and software. Been making some modifications a la C64 to make it more usable, more RAM, adding in the serial bit banging (for now!), will add in the Ben Eater graphics card here sooner or later and go from there hopefully!