I was really surprised to see an SMT device on this board, but then I noticed a few chips with 1990 date codes and I guess by then SMT was starting to be used i

I was really surprised to see an SMT device on this board, but then I noticed a few chips with 1990 date codes and I guess by then SMT was starting to be used in more consumer electronics. My Shootout (also by Data East) arcade console from 1985 is 100% through-hole components.