BaskinRobinson

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  • April 29, 2019 at 11:35 AM in reply to: Dreamcast wrong aspect ratio #26086
    BaskinRobinson
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      If you use 640×480 sampling, it won’t sample the entire image—only 800 pixels will be sampled instead of 858.

      April 24, 2019 at 6:20 AM in reply to: Dreamcast wrong aspect ratio #26002
      BaskinRobinson
      Participant

        I have the same narrow image on my TV using AV1 with a SCART cable as I do using AV3 with a VGA cable.

        April 23, 2019 at 4:46 PM in reply to: Dreamcast wrong aspect ratio #25995
        BaskinRobinson
        Participant

          I have the exact same problem: https://videogameperfection.com/forums/topic/dreamcast-ossc-toro-aspect-ratio-issue/

          Works fine on my monitor, too narrow on my TV.

          March 2, 2019 at 1:09 AM in reply to: Dreamcast OSSC + Toro Aspect Ratio Issue #25440
          BaskinRobinson
          Participant

            Alright, so I tested the SCART cable again and was able to get a 480p signal working. However, it has the same aspect ratio problem as the VGA cable.

            The Dreamcast startup screen is close to 4:3, but it’s slightly narrow. Once the GDEMU loads up, and when I start a game, the image gets much narrower.

            At this point, I’m convinced my TV is simply incompatible.

            March 1, 2019 at 6:35 PM in reply to: Dreamcast OSSC + Toro Aspect Ratio Issue #25435
            BaskinRobinson
            Participant

              On the Toro, you need to have the Dreamcast mode switch (the one in the bank of four closest to the console) set to ‘VGA’, so the console will output 31kHz RGBHV (480p). Then you need to run a fully-wired male-to-male SCART cable from the Toro to AV1, and change the input on the OSSC to AV1-RGBS. The other RGBHV/RGBS toggle, the one between the DE-15 and SCART outputs on the Toro, only changes between RGBHV and RGBS on the DE-15 output; the SCART output is full-time RGBS, regardless of what the console is outputting.

              Thanks for the clarification. I will double check when I get home later, but I recall getting a 480i signal regardless of the switch being set to “RBG” or “VGA”.

              March 1, 2019 at 5:53 PM in reply to: Dreamcast OSSC + Toro Aspect Ratio Issue #25431
              BaskinRobinson
              Participant

                How does the aspect ratio look when running the 240p Test Suite?

                I haven’t tried the 240p Test Suite—I’ll need to get that set up. Either way, the aspect ratio is definitely narrower than 4:3.

                Does the Dreamcast use 480i/576i for the boot splash and then switch to 480p, or is it 480p the whole time?

                I’m not actually sure. I think it’s 480p the entire time. How would I confirm?

                Side note: You may want to consider picking up a SCART cable to connect the Toro to the OSSC; the Dreamcast can benefit from the low-pass filtering that is available on AV1 (also AV2) that isn’t present on AV3.

                I tried this, but was not able to get a 480p signal, only 480i. I tried every combination of VGA/RBG and RGBHV/RGBS on the Toro, but the TV only accepted the signal when it was 480i, and it seemed like a very low-quality, shimmery 480i at that.

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