DVI mode outputs red instead of blue

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Viewing 6 posts - 1 through 6 (of 6 total)
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  • June 9, 2022 at 8:53 AM #53626
    rthorntn
    Participant

      Hi,

      My OSSC has been epic, I want to use it with an old 4:3 monitor I have, it only has DVI (Samsung XL20) to get any picture I need to change to DVI mode but then a blue C64 (via Koryuu) BASIC screen outputs in red.

      The monitor is fine, the C64 output is blue over HDMI and I’ve tried different HDMI to DVI cables.

      Can someone please help?

      Thanks.
      Richard

      June 9, 2022 at 11:34 AM #53628
      Zacabeb
      Participant

        It could be that the monitor doesn’t like the formatting of the signal. When I encountered the same problem, adjusting the horizontal backporch up or down a step helped fix the RGB order.

        Fingers crossed! 🤞

        June 9, 2022 at 12:01 PM #53629
        rthorntn
        Participant

          Thanks, that didn’t work though.

          June 13, 2022 at 12:29 PM #53677
          BuckoA51
          Keymaster

            What colour is the test pattern image when you first power on the OSSC?

            June 15, 2022 at 6:46 AM #53697
            rthorntn
            Participant

              Thanks, I don’t see a test pattern when I power on the OSSC connected to the XL20 as the monitor doesn’t get a signal until I change the OSSC to DVI mode.

              An update, I used an HDMI to VGA cable with a VGA to DVI-I dongle and I get the correct colours, obviously I have no need to change the OSSC to DVI mode.

              June 16, 2022 at 9:41 AM #53704
              BuckoA51
              Keymaster

                You can change the OSSC to DVI mode and still see the test pattern. If you save settings DVI mode will also be retained.

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