Yes, it's definitely not microcode. The in-game CPU is not-so-loosely modeled on the 6502 which uses a PLA to activate the signals and control wires based on the output of the timing logic and opcode decoding. I know a little bit about how it works but I don't actually know what that form of microarchitecture is called. I don't think I've ever seen it named. "Hardwiring" seems like a useful name for it :)