Well, here's a file that shows how a palette rotate could be done. The advantage of this way is that it's just as easy to rotate both directions, and it doesn't require any additional memory, like backup copies of the palette or the such...
File List:
PALROT.ASM
4Kb
PALROT.EXE
1Kb
PALROT.TXT
1Kb
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Colorquant.c
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