640×512 line doubling

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  • July 23, 2017 at 7:43 AM #14001
    cr4zymanz0r
    Participant

      The Sharp X68000 uses some odd resolution when outputting in 31khz. The TV is saying 640×512, and that’s also what the “advanced timings” section of the OSSC defaults to when the X68000 is in 31khz mode.

      Basically, some X68000 games can be changed to run at 15khz and they look far sharper at line 4x than ‘512p’ only game does on passthrough. It’d be great if it could line double to 1024p. Unsure how many displays would support, but my Toshiba HDTV seems to throw every weird thing I throw at it.

      EDIT: As I’m unsure if you own a X68000 to test with, I’d be glad to provide any additional needed information or perform testing to help out.

      July 31, 2017 at 10:44 AM #14166
      marqs
      Participant

        Yes, 640×512 mode could be added to “480p/576p” group which would then allow switching between line1x/2x with respective option. I’ll add that to TODO list.

        August 14, 2017 at 10:45 PM #14414
        marqs
        Participant

          That’s now implemented in v0.78 firmware.

          July 1, 2019 at 9:31 PM #26880
          seren
          Participant

            Sorry to revive.

            Since I’m still trying to get my head fully around the OSSC, would it make sense to also explicitly support native X68000 resolutions 512×512 and 512×256? With 640×512 I’m able to adjust vertical size and position of the X68000 image, but not horizontal size & position. Would supporting these native resolutions enable that?

            BTW I made a little (0.83) config for a BenQ BL912 (HDMI to DVI) for the X68000 (feel free to improve) to use with http://pbnl.byethost7.com/ossc/profiles/.

            https://pastecode.xyz/view/399e9907

            This is in passthrough for 640×512 if IRCC. So setting this to 2x would make it look better?

            July 25, 2019 at 1:08 PM #27155
            paulb_nl
            Participant

              With 640×512 I’m able to adjust vertical size and position of the X68000 image, but not horizontal size & position. Would supporting these native resolutions enable that?

              You should see the image become narrower when lowering H.samplerate. Adding the resolutions to the list won’t make a difference because they are mostly just presets.

              This is in passthrough for 640×512 if IRCC. So setting this to 2x would make it look better?

              That depends on the scaling quality of your display. 2x should be sharper on most displays.

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