This was written in assembly and to do that you'd have to make a new register of all the references while randomizing. Your approach works great in modern, hig

This was written in assembly and to do that you'd have to make a new register of all the references while randomizing. Your approach works great in modern, high level languages where there's no issue copying an array in memory and calling array_shuffle or something, and doubling the memory requirement for the effect is no problem. This approach however seems to only require 17 bits of additional memory.