These are the source files for a recent Youtube video of mine. "A 6502 Based Computer on a Single Breadboard" https://youtu.be/s3t2QMukBRs
Prerequisites:
Install cc65 (and minipro if using a tl866II+ to program a ROM) using your favorite package manager Run assemble.sh to assemble the source file
The hardware schematic was created using KiCAD 6