6502, mainly because it was affordable (~$25 in 1975 vs at least $175 for other chips in the day) Thus it truly spurred the home and hobbyist computer revoluti

6502, mainly because it was affordable (~$25 in 1975 vs at least $175 for other chips in the day) Thus it truly spurred the home and hobbyist computer revolution. It also performed quite well for its speed with most instructions completing in 1-3 cycles, many CPUs of higher clock rates weren't as efficient as the 6502.