This simple C# CPU 6502 emulator is based on amazing stuff:
https://github.com/OneLoneCoder/olcNES
https://www.youtube.com/watch?v=8XmxKPJDGU0&ab_channel=javidx9
Thanks javidx9, it was inspirational :)
Implement ANTIC processor with it's fantastic Display List but that is hard one ;)