By the way, throttling the CPU to a constant frequency is the proper way to run the 1999 game Pharaoh (en.wikipedia.org/wiki/Pharaoh_…). Some people merely change its default speed settings (protondb.com/app/564530#BBh0du…), but that only solves half of the problem. The game is too fast on modern computers because its speed depends on the number of instructions the processor executes per second, not on real time (en.wikipedia.org/wiki/Elapsed_…).
⇧