Trouble with PS1 through Gscartsw

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  • November 5, 2017 at 8:17 PM #16850
    PaulieORF
    Participant

      I recently got an OSSC 1.6 to replace my Framemeister. I already had a gscartsw v3.4 which I used with my Framemeister with no problem. My OSSC works great, and all consoles work with it through the gscartsw except my PS1. if I connect my PS1 directly to the OSSC, it works fine. I have tried both luma sync and c-sync cables from Retro-Access with no luck. I have turned off the gscartsw’s built-in sync stripper, and also verified that the PS1 cables do not have a sync stripper or circuit of any kind in them. This is an NTSC 1001 PS1. I’m completely flabbergasted as to why this works fine when connected directly to the OSSC, works through the gscartsw with the Framemeister, but not with the OSSC through the gscartsw. Has anyone heard of such an issue, and are there any suggestions on things to try?

      EDIT: I should’ve been more descriptive. When powering on the PS1 through the gscartsw and the OSSC, the screen on the OSSC stays at the gray gradient screen its display says “no sync”. There is audio, but it’s crackly and distorted.

      November 5, 2017 at 10:20 PM #16855
      BuckoA51
      Keymaster

        SCART switches run on a special kind of voodoo magic it seems. Try increasing Hsync tolerance in the Sync opt. menu.

        November 5, 2017 at 10:55 PM #16859
        PaulieORF
        Participant

          Thanks. I played around with different values for the H-sync tolerance, but couldn’t get anything.

          One thing I’ll add here is that the behavior in my original post is from the luma cable. When I use the c-sync cable, the OSSC display briefly flashes “AV1: RGBS 311p. 15.73kHz 50.50Hz” for maybe half a second, then switches to “no sync”. The screen does change from the gradient screen to a black screen. There is no sound at all with the c-sync cable.

          November 6, 2017 at 1:35 AM #16860
          PaulieORF
          Participant

            A little more info.

            I dug out another PS1 of mine and it has the exact same issue, so I can rule out the console.

            I also recorded my OSSC’s display in slow-motion with my phone when I power on the PS1, and it flashes random resolutions on the screen so fast. So fast, I had the use slo-mo in order to actually capture more than one of them. The resolutions it displays can be pretty random. Here’s one example I recorded: IMG_0259.TRIM.mp4

            November 6, 2017 at 10:46 AM #16865
            BuckoA51
            Keymaster

              I’m stumped! Maybe it’s worth asking SuperG directly? There’s a support thread here you could try:- https://shmups.system11.org/viewtopic.php?f=6&t=50851

              November 6, 2017 at 11:39 AM #16868
              paulb_nl
              Participant

                PS1 does not output Csync so you either have a cable with a sync stripper as the Retro-Access website describes or its a composite video sync cable. Use the luma sync cable.

                Maybe the gscartsw is outputting a higher voltage sync? Try tweaking Analog sync lpf, Analog sync Vth and other sync settings. Set H-PLL Pre-Coast and Pro-Coast to 3.

                November 6, 2017 at 11:37 PM #16890
                PaulieORF
                Participant

                  Thanks. I played around with these settings and used the luma cable, and could get nowhere. I’m going to attempt to reach out to Super G.

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