blastar (./52) :
you are right, this way it's a bit faster - 47 lines.

So for a copy loop including #0 this seems to be the final option.

Did you also test the movem.W loop for skipping color #0? (Posts #43 and #45) This should take ~51 lines without using a7 and ~49 lines with using it.

This means, that depending on the rendering requirements (color #0 rows or columns possible), there are fast copy loops with and without color #0 skippings.