Powder engine had a trick for displaying a bunch of stuff in 16 colors and 25 fps (have feeling could be pushed to 50 but not sure) using flags that enable/disable the blitting of certain bitmaps/palettes so to have subpalettes of 2/4/8 colors and was working in a 500 1.2 with extra 512k fast; since the source is not completely license clear for public display, if someone want to give it a look to see if any of those tricks are usable can PM me.
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