Comment by djmips
4 months ago
Have you run https://github.com/Klaus2m5/6502_65C02_functional_tests ?
See also https://www.righto.com/2012/12/the-6502-overflow-flag-explai...
I also note that you have the same code copy/pasted in every ALU operation which might be better expressed in one location for maintenance reasons.
Good call out. Thank you! I will give a try.