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I was going to say, even the readme file only mentions N64 and DC.
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Most of the older consoles don't have an FPU. Fixed point is king on those older systems.
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Only one of the consoles listed lacks an FPU, the other two (N64 and DreamCast) both have FPUs. Despite its age, the FPU on the N64 was plenty fast and it was used extensively.
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