> So then I suppose I could ask, when did frame buffers come back into fashion? But I > suspect the answer to that would be around when 'true 3D' became popular, as frame > buffers are a requirement in most kinds of z-buffering based 3d rendering techniques.
There were bitmap based games even at the time of pacman. Williams games like defender etc don't use tilemaps.
Whether you use a bitmap with a blitter or a tilemap with sprites is a complex decision, based on what kind of games you are trying to make and the cost you're aiming for.
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