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You could run it on a mid-90's CPU without speculative branching and very likely see better performance.

486 or Pentium 90, what this game was made for.

Yea, either one of those would run the game better than this project/slideshow.

Or, alternatively, an x86 emulator on a more trustworthy architecture such as RISC-V, or an x86 implementation on an FPGA.