Another thread mentions it was done at the transistor-level. http://atariage.com/forums/topic/169434-6502-fully-simulated-at-transistor-level/ http://atariage.c

Another thread mentions it was done at the transistor-level. http://atariage.com/forums/topic/169434-6502-fully-simulated-at-transistor-level/ http://atariage.com/forums/topic/169434-6502-fully-simulated...