PacManPlus Posted April 9, 2018 Share Posted April 9, 2018 Hi guys... running into an issue with my current project. Doesn't One on One use a 320 mode background with 160 mode sprites? I'd like to do that with my current project, but I don't see a way of doing it. I really don't want to switch to 160 mode completely... How did they do that? Thanks, Bob Quote Link to comment Share on other sites More sharing options...
+Defender_2600 Posted April 10, 2018 Share Posted April 10, 2018 Hi Bob, 320 mode + 160 mode would be very interesting ... Anyway, I see a few square pixels in those sprites. Maybe they used the 320C mode sprites with 320A mode background. -------------------------------------------------------------------------------------------------- 320C WM=1,RM1=1,RM0=1 4 colors from 2 palettes + background & transparent, 2 bits / pixelD7 D6 D3 D2 0 0 0 0 BG + BG / transparent 0 0 0 1 BG + BG / transparent 0 0 1 0 BG + BG / transparent 0 0 1 1 BG + BG / transparent 0 1 0 0 BG + c2 0 1 0 1 BG + c6 0 1 1 0 BG + c10 0 1 1 1 BG + c14 1 0 0 0 c2 + BG 1 0 0 1 c6 + BG 1 0 1 0 c10 + BG 1 0 1 1 c14 + BG 1 1 0 0 c2 + c2 1 1 0 1 c6 + c6 1 1 1 0 c10 + c10 1 1 1 1 c14 + c14 ----------------------------------------------------------------------------------------------------- 1 Quote Link to comment Share on other sites More sharing options...
+Defender_2600 Posted April 10, 2018 Share Posted April 10, 2018 Bob, I don't know if it helps for your project (and maybe I'm missing something) but the 320D mode looks like the equivalent of 320B mode (with 3 colors + background & transparent from 2 palettes) with the advantage that the 320D mode is only 1bpp (as 320A) and therefore approximately equivalent to 160A (cycles consumption). Quote Link to comment Share on other sites More sharing options...
PacManPlus Posted April 10, 2018 Author Share Posted April 10, 2018 Thank you for that... Although I need more colors than only 2 palettes' worth... which is why I couldn't go with 320A either... I may have to convert it to regular 160A mode. Quote Link to comment Share on other sites More sharing options...
+Defender_2600 Posted April 10, 2018 Share Posted April 10, 2018 Obviously, I will not ask you questions about this mysterious background... but I wish you all the best in your work. Quote Link to comment Share on other sites More sharing options...
gambler172 Posted April 11, 2018 Share Posted April 11, 2018 Hi guys... running into an issue with my current project. Doesn't One on One use a 320 mode background with 160 mode sprites? I'd like to do that with my current project, but I don't see a way of doing it. I really don't want to switch to 160 mode completely... How did they do that? Thanks, Bob Hi my friend cannot wait to se a 1st bin of you new project Hope you are well. greetings Walter 1 Quote Link to comment Share on other sites More sharing options...
EricBall Posted April 11, 2018 Share Posted April 11, 2018 Doesn't One on One use a 320 mode background with 160 mode sprites? I'd like to do that with my current project, but I don't see a way of doing it. I really don't want to switch to 160 mode completely... Unfortunately it's not possible to mix 160 and 320 modes on a single line as that is controlled by the Read Mode bits in the CTRL register. You could change the CTRL register mid-screen using a Display List Interrupt to have different sections of the screen use different resolution. Bob, I don't know if it helps for your project (and maybe I'm missing something) but the 320D mode looks like the equivalent of 320B mode (with 3 colors + background & transparent from 2 palettes) with the advantage that the 320D mode is only 1bpp (as 320A) and therefore approximately equivalent to 160A (cycles consumption). The difference is in how the palette bits are used. So with 320D if the sprite is palette = x01 then the sprite can use the second set of four pixel duos: BG+C1 / transparent, BG+C3, C2+C1, C2+C3. So while 320D looks like it has all of the combinations which 320B has, each 320D sprite is restricted to what colors it can use for each pixel. But I'm glad to see someone using my tables! 2 Quote Link to comment Share on other sites More sharing options...
SlidellMan Posted April 12, 2018 Share Posted April 12, 2018 I have to see the potential results of this. Quote Link to comment Share on other sites More sharing options...
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