Microcode engines are a subset of state machines which
read the state
transitions from an external memory instead of the transitions being
developed by random logic.
So if you make a cotnrol system using a latch and a PROM programemd to
contain the state transistion logic for what I would term a 'state
machine', then it's microcode? And if you repalce the microcodoe ROMs in
a processor with a large board of decoder ICs and logical OR gates (which
is all a ROM is intenrally), said processor ceases to br microcoded?
-tony