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Generally, ST scroll routines in games were (in my experience at Core at least) created by having preshifted block "pairs".. then the tile data can be moved to the screen with simple moves... having the blocks preshifted means you need to store the tile-pairs for each pixel of scroll resolution...
I'd imagine on TOKI they probably have a scroll resolution of 4 pixels on the ST... so they would need to store 4 sets of these preshifted pairs.
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