OSSC – Best option for PS1

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  • June 14, 2021 at 7:58 PM #47909
    Opaque79
    Participant

      Been using optimal timings when possible but PS1 is difficult.

      1. Being in a PAL region, I lose parts of the image on a lot of games
      2. PS1 resolution isn’t consistent

      Using 5x mode for the most part as my TV displays most optimal timings in that mode

      June 14, 2021 at 8:03 PM #47910
      Harrumph
      Participant

        If you search forum (or maybe google is better at finding it) there was a guy who made profiles for PAL systems.

        My advice though would just be generic mode, with the 270 v.active tweak for 1080p output in 4x mode. See tips & tweaks thread for more info on that.

        June 14, 2021 at 8:08 PM #47911
        Opaque79
        Participant

          Err…that was me. You mean this

          Makes sense really. Only time optimal timings really work on PS1 is if the resolution is consistent

          June 17, 2021 at 10:34 AM #47939
          Harrumph
          Participant

            Ah right lol goldfish memory 🙂

            July 29, 2021 at 1:00 PM #48581
            Opaque79
            Participant

              Just noticed. Tested my PS1 512 profile with a few games in that resolution. Works fine but Tony Hawk’s Pro Skater 3 requires a different sampling phase setting despite being a 512 game.

              The other games tested were
              Tomb Raider III
              Tomb Raider – The Last Revelation
              Spyro the Dragon
              Crash Bandicoot

              All are fine with Sampling at 90 deg but THPS3 requires 202 deg to have a sharp image despite being the same resolution. Why is this?

              July 29, 2021 at 5:29 PM #48584
              Zacabeb
              Participant

                All resolutions in the PlayStation are based on a fixed subpixel clock that’s a high enough multiple to cover all the supported output resolutions. Each pixel is simply repeated for a suitable number of those subpixels when output.

                When a game sets up the start position of the frame buffer relative to the horizontal sync, it’s done in steps given by this subpixel clock. Hence the pixels in one game may be shifted a fraction of a pixel compared to the pixels in a different game running at the same resolution.

                July 29, 2021 at 5:37 PM #48586
                Opaque79
                Participant

                  So because of that, some games need a different sampling phase setting?

                  I only use optimal timings on PS1 games that use a consistent resolution. If the games switches resolution often (FF7 for example), it’s not worth it

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