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Old 10 July 2015, 15:29   #51
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Join Date: Jun 2009
Location: Dublin, then Glasgow
Posts: 2,465
The 68060 in general was downwards compatible with the 68020 (and 68000) instructions with no major penalty. What normally caused the big slowdowns were FPU instructions, but of course that can't be the case here. I wonder what instructions could cause such a massive problem that don't affect any other game in the same way that I know of - must be something pretty obscure since from what I can tell here the only big problem should be not taking advantage of the multiple execution units and probably related cache misses. Even without using any of the 060's extra features it should still run rings around the 020, and does for any other game I've tried.

Oh well, it's something I might look into further at some stage for my own curiosity. In the end it's not a big deal since the original exe still works great.
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