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AGA does have colorbank swap option via bplcon4, so you can swap colorbanks in sizes of 2^n with a single instruction in copperlist. That means you can preload 256 colors in color registers, and if you have eg. a 32-color display, you can have 7 other 32-color banks that can be swapped as active bank. This is handy as you dont need to write each color separately as in OCS, but there is of course a 256 color limit. This also puts an end to copper color clashes, as you can change anytime unused color banks, and have active bank untouched.
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