What we are really doing is adding 16 waves together. You can also see the chroma shifts phase too in the pure white. You can see the pureblack screen has a "double slit interference pattern" The "proper" way to do scanline conversion Apple Memory -> NTSC -> RGB is to do left-to right conversion keep tracking of the Chroma Phase and Luma at each 560-pixel location.Ībove is my HGR test pattern on Sheldon's NTSC: Reply to this email directly or view it on GitHub. On Dec 16, 2014, at 8:39 PM, sicklittlemonkey wrote: Need to track down executables now that I have my HGR test pattern (in latest commit in Sheldon's NTSC branch) and in bug #254 :-) I've seen Epple but didn't think it brought anything new to the table - looks like I should give a try at least once. The "modern" way to do this would be to use the GPU - wasn't someone doing something crazy like 21 passes? Rebecca provided RGB values? That spreadsheet looks real interesting. Recall Michael Mahon saying that the Apple //e monitor switches to a higherīandwidth mode in mono to allow 80-columns to look good. The pics on his page have the vertical stripes you prefer, which - as farĪs I understand - would only happen with a very high bandwidth monitor. It used the GPU.Ĭhristopher has emulated all the timing oddities observed by Sather, andīased his NSTC emulation on Trevor Blackwells. He was a very clever engineer, and his CRT emulation is probably the best ever done. I have a version of Blargg's code that renders Apple II video, He had help from another guy whose handle was "New Rising Sun" or I usually find this code by googlingĪ comment that stuck in my head: "This is fixed-point integer DSP, son. In a reply I linked to those people who I'd seen work of note from in this Munafo (and others') suggested RGB values: She had her own take on things after the debate on c.s.a2 about Robert I actually corresponded with "Rebecca" from of the Apple II font fame: Recently I've actually been looking into NTSC emulation and trying to
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