That was my first thought too. My second thought was that the most effective recreation would be to build a SPICE model [1], and whether that SPICE model could

That was my first thought too. My second thought was that the most effective recreation would be to build a SPICE model [1], and whether that SPICE model could run in near real time on a modern CPU. A simple SPICE model should be straightforward based on the circuits in the article. From memory, the SPICE transistor models take things such as transistor feature sizes as parameters, so it might be possible to get a surprisingly accurate model from the die photo? [1] https://en.wikipedia.org/wiki/SPICE https://en.wikipedia.org/wiki/SPICE