640×512 line doubling

NewHome Forums OSSC & OSSC Pro OSSC – Feature Requests 640×512 line doubling

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  • #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.

    #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.

    #14414
    marqs
    Participant

    That’s now implemented in v0.78 firmware.

    #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?

    #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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