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Originally Posted by Gorf
So it would be more like pointing to a block of chunky pixels in ChipRAM and let Denise fetch it and (maybe) transform it to planar internally ...
this is very close to a "pure" chunky mode ... with the advantage, that sprites and copper-effects would still work.
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I think it would have to be arranged so that the virtual Denise fetches as though from four high-res bitplanes, then reads a complete chunky pixel (or maybe pair of pixels) from each in turn?
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The "Piccolo" method is the other way around: we have chunky pixels in ram, but they are treated as planar by Denise and the "mess" that this output generates is cleaned up afterwards ...
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Indeed - that's the "Graffiti", I think? Available both as a standalone external A520-like box, and as part of the Indivision ECS scandoubler. (Piccolo was an actual RTG graphics card.)
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The first method (internal Akiko) makes more sense i think ... but on the other hand: there is already existing software for the Piccolo-mode...
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I agree. On the other hand, most of the software that supports Graffiti has modular video drivers, so writing new ones shouldn't be beyond the bounds of possibility.