apemaster Posted January 31, 2015 Share Posted January 31, 2015 Do I get that right: When I use the DPC+ kernel, I can either ... ... have a 32 pixel wide and single-scanline playfield, but no color changes ... or have a 32 pixel wide and double-scanline playfield, but have a color change of pfd and background in each double-scanline Is that correct? Quote Link to comment Share on other sites More sharing options...
apemaster Posted January 31, 2015 Author Share Posted January 31, 2015 So something like this would be possible (+ more sprites) ... Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted January 31, 2015 Share Posted January 31, 2015 Looks like Timmy! Quote Link to comment Share on other sites More sharing options...
apemaster Posted January 31, 2015 Author Share Posted January 31, 2015 That's because this level-design resembles a level of Jumpman. But I noticed that in Timmy, it's a single-scanline resolution with color change every scanline. Is that also possible with the DPC+ kernel? Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted January 31, 2015 Share Posted January 31, 2015 Yeah, I was being facetious. As mentioned in the blog, Timmy! was inspired by Jumpman. I used to play Jumpman a lot on my C= 64, before I rewrote my VIC-20 BBS software to run on the 64. While I'm using a DPC+, I'm not using batari Basic - my code is in 6507 assembly and C, which runs on the ARM processor in the Harmony/Melody board. DPC+ is an updated version of DPC, used in Pitfall 2. We developed DPC+ back in 2010. batari Basic was updated to utilize it, via the DPC+ Kernel option. Quote Link to comment Share on other sites More sharing options...
+Random Terrain Posted January 31, 2015 Share Posted January 31, 2015 Have you looked at the bB page yet? This is all I know about it: randomterrain.com/atari-2600-memories-batari-basic-commands.html#dpc_playfield_resolution Quote Link to comment Share on other sites More sharing options...
RevEng Posted January 31, 2015 Share Posted January 31, 2015 Do I get that right: When I use the DPC+ kernel, I can either ... ... have a 32 pixel wide and single-scanline playfield, but no color changes ... or have a 32 pixel wide and double-scanline playfield, but have a color change of pfd and background in each double-scanline Is that correct? IIRC, you have a single-scanline playfield *and* you have playfield and background colors at 2 line resolution. No need to choose. Quote Link to comment Share on other sites More sharing options...
iesposta Posted January 31, 2015 Share Posted January 31, 2015 You can have a bB DPC+ PF in single line resolution, 32 x 176 from 1 color (DF4FRACINC=0) to DF4FRACINC=255 but that color changes every 2 lines. Same with the background color. Our DK Arcade 2600 linked in my signature uses single line playfields, but designed very carefully because color changes happen every 2 lines i.e. two scanlines are one color, the next two can be another color, etc. P0 is the remaining Playfield of the 2600's 40 col playfield, but you can only turn on strips (or all 4 spaces on each side, mirror linked) that run top to bottom. Quote Link to comment Share on other sites More sharing options...
apemaster Posted February 2, 2015 Author Share Posted February 2, 2015 Ah, so P0 can be used to create "walls" on the left and right, so the full 32 width can be used for the playfield. Quote Link to comment Share on other sites More sharing options...
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