tppytel

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  • November 2, 2017 at 8:05 AM in reply to: Line5x and aspect ratios? #16707
    tppytel
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      Also, is there any expectation that the 256×240 optimal sampling mode should work for PS1? I tested a bit with SOTN and couldn’t get a clean image despite playing around with the Sync LPF and Sampling Phase settings. From what I’ve read, the PS1 in 256×240 mode has the same dot clock and other characteristics as an NES or SNES, but maybe I’m missing something. I’m not unhappy with the generic 4:3 setting. Looks terrific.

      November 1, 2017 at 11:29 PM in reply to: Line5x and aspect ratios? #16693
      tppytel
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        Thanks for the replies. Those and some more Googling led me to some helpful reading. I understand now how the dot clock and the horizontal scan rate get you a 341 pixel line, of which 3/4 of the line (256 pixels) is signal. So it’s the 75% (the percentage of signal in each line) that’s staying constant. Got it.

        I’m still a bit confused about the 1536, though. I found the Optimal Timings page on the wiki and I see that it’s coming from 256 x 6 = 1536. And 1536/1200 ~= 1.28. So is the x6 multiplier just the integer multiplier that gets us closest to 4:3 aspect? So that way we can scale up the native 256×240 without doing any interpolation?

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