Indeed, the difference is somewhat subtle, as explained here: https://retrocomputing.stackexchange.com/questions/15227/why-did-later-cpus-use-microcode-instead

Indeed, the difference is somewhat subtle, as explained here: https://retrocomputing.stackexchange.com/questions/15227/why-did-later-cpus-use-microcode-instead-of-plas https://retrocomputing.stackexchange.com/questions/15227/why...