tl;dr: The M6 Mac Mini sustains a 600MHz emulated Pentium II with Voodoo 3 in 86Box (Windows 98, Cinebench + Winamp running) at a flat 100% emulation speed, a 20% improvement over the base M4's 500MHz ceiling. Since 86Box's cycle-accurate emulation is bottlenecked on a single thread, Apple Silicon's strong single-core performance (~4.7GHz on the M6's "super" cores) makes the Mini punch well above its weight. Oddly, emulated Cinebench 2000 scores run 60%+ higher than user-reported results from real period hardware at the same clocks, likely due to cache/memory timing inaccuracies in P6 emulation.