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"Hey Bob, amazing work with Frenzy, for both of your versions.   About the colors for the different walls types in the 7800 version, in hindsight, maybe it was possible to use \"sprites as tiles\", in order to have 8 colors available for the walls (in 320A mode). Or use 320A for the sprites and 320C for the walls.\n \n\n\n\t \n \n\n\n\tAnyway, what I meant is that it can be misleading to judge the potential of a system simply by looking at the game ports, which happens too frequently with the 7800 (very versatile hardware by the way), in fact a \"perfect port\" of your gorgeous Bentley Bear's Crystal Quest (with 4bpp sprites and lots of background color) would be impossible on the NES or imagine trying to do that on the Pac-Man original arcade hardware...\n \n"
<https://forums.atariage.com/topic/349547-320-mode-colours-question/page/3/>