Firmware 0.72

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  • August 23, 2016 at 7:24 PM #8572
    marqs
    Participant

      Firmware 0.72 is now out with the following updates:

      * Some scanline rendering issues fixed
      * Initial input option added
      * Advanced timing tweaker added
      * R/G/B gain/offset controls added
      * Sync filtering improvements (should remove the need for sync LPF/external filters in many cases, and slightly improves NES/SNES compatibility)

      There’s a lot of things that can be done with timing tweaker, but efficient use requires some knowledge of the source and underlying logic. Below are a couple examples which demonstrate the possibilities with compatible displays:

      * DC aspect fix: 480p -> H. active = 640
      * Saturn pixel-perfect 320×240: 240p_L3M2 -> H. samplerate = 427 -> phase adjustment
      * CPS2 pixel-perfect: 240p_L3M2 -> H. samplerate = 512, H. active = 384, H. backporch = 66 -> phase adjustment
      * N64 de-blur (untested): 240p_L3M2 -> H. samplerate = 387, H. synclen = 22, H. backporch = 22 -> phase adjustment

      NOTE: modified parameters are not yet saved along with other settings. That will be implemented on the next fw with profile support.

      August 24, 2016 at 10:28 AM #8586
      h1ghju1ce
      Participant

        Awesome stuff 🙂

        Cant wait to test it out

        (Link to FW incase people ask)

        https://www.niksula.hut.fi/~mhiienka/ossc/fw/

        August 24, 2016 at 3:06 PM #8591
        paulb_nl
        Participant

          Thanks marqs! The advanced timing tweaker is really great. I had linetriple 4:3 running in 1920×720 resolution with 1440 active. 🙂

          Lost vikings on a 1-CHIP snes now works without sync LPF. Street fighter 2 still needs sync LPF.

          August 25, 2016 at 1:44 PM #8612
          slampt
          Participant

            Sweet, FYI tried a bunch of 8G MicroSD’s, none worked. I have ordered some 2G ones to try.

            August 26, 2016 at 8:22 PM #8629
            Pajamaslayer
            Participant

              Thanks for the update, but the advanced timing tweaker seems buggy for me. This was all tested on Dreamcast RGBHV with the DTV 480P setting.

              I assume that the DC aspect fix was supposed to stretch out the image a bit, but all that the H. active setting does for me replicate the left side of the screen and slide it in on the right side as I lower the value. All other settings were left at their defaults for this.

              Another issue unless I’m misunderstanding something, if you take H. backporch and lower it some to move the image to the left and then decide to shift it back to the right some, the first time you increase the value it continues to shift the image left one more value instead of to the right. A second increase will start making it shift to the right, but there definitely isn’t a 1:1 relationship with the values and the effect here. This behavior happens going both ways and also happens on other advanced timing settings (I didn’t test them all for it).

              August 28, 2016 at 1:14 AM #8650
              marqs
              Participant

                Seems like your display doesn’t properly support these timings. My main TV also starts to loop the picture if active length is set below 720 pixels in DTV-480p mode, while both my desktop monitors correctly resize the picture to match active area size.

                August 28, 2016 at 8:30 PM #8661
                Pajamaslayer
                Participant

                  Ah, okay, I didn’t realize it would be changing the signal that much. I dug out an old monitor and the aspect ratio fix does work correctly with that. Thanks for the reply!

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