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Snes ghosting

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This topic contains 8 replies, has 5 voices, and was last updated by  noko_bombette 9 months ago.

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  • #10139

    noko_bombette
    Participant

    I can see some ghosting on my TV while using SNES. For example, if Mario jumps and background is white, I can see a ghost Mario at right. The lives counter causes a shadow that goes all way down, etc.

    Testing the same Snes with Framemeister causes no ghosting.

    Snes: PAL one chip, with SuperCIC mod. Playing a PAL game in 50 Hz.
    OSSC: connected to Scart input, selected input 1. Default settings, 576p output.
    Cable: rgb luma sync from retrogamingcables.
    Framemeister: picture mode, tested in 1080p and 576p 50 hz. Euro Scart adapter with csync circuit.
    Tv : Sony kdl42w750b. Tested on the same hdmi input, all processing disabled.

    #10162

    paulb_nl
    Participant

    It would probably help if you posted a picture. It could be the rgb cable thats causing it. Do you have issues with other consoles?

    #10163

    noko_bombette
    Participant

    The problem with the pictures I’ve taken is that the effect is hard to notice, but I will post them later.

    I used the same cable to test with the Framemeister. Previously I was using the old SNES PAL RGB cable that retrogamingcables provided that had not luma sync, and I had image noise also only with OSSC. I guess that the Framemeister is somewhat filtering all those image issues.

    I have also a SNES RGB NTSC with csync cable from retrogamingcables that I may test in some days.

    #10164

    paulb_nl
    Participant

    Its probably the sync stripper inside the Framemeisters scart adapter thats filtering the issues. Did you also see the shadowing with the rgb cable without luma sync?

    #10172

    marqs
    Participant

    It’d help if you can try another console on the same input to isolate the issue to snes, cable or ossc. Framemeister probably has a bit stronger LPF than OSSC in sdtv mode, but you shouldn’t see noise/ghosting with a quality cable and well-conditioned console (e.g. no leaky caps).

    #10194

    BuckoA51
    Keymaster

    Actually ghosting is supposedly quite common on the 1-chip RGB modded consoles. I’ve been looking at ways to eliminate or minimise it with modding.

    #10207

    noko_bombette
    Participant

    I’m not sure if you will be able to see the “shadow Mario” at right in the first image since it’s hard to notice in the picture I took. But while playing it is very distracting 🙂

    OSSC:

    View post on imgur.com

    Framemeister:

    View post on imgur.com

    ghosting is supposedly quite common on the 1-chip RGB modded consoles

    This one is not RGB modded since it’s a PAL one chip (not Mini, I can’t tell which board version right now).

    I’m waiting to receive my SNES mini with the NTSC cable from the mail so then I will be able to check with that console and cable too. Next week I will also check the old RGB cable without luma sync.

    • This reply was modified 9 months, 2 weeks ago by  noko_bombette. Reason: more info about SNES model
    #10227

    borti4938
    Participant

    Your problem is the 1Chip-SNES and not the OSSC! You will observe the same problem with your SNES Mini…

    http://shmups.system11.org/viewtopic.php?p=1226995#p1226995

    Just a guess.. it might be not noticeable at the Framemeister because the Framemeister saturates the input signal at standardized Upp levels… If this is the case the problem is not noticeable… just a guess…

    #10485

    noko_bombette
    Participant

    Ok thank you, I’ve also tested that Snes with a BVM and I can see the ghosting.

    So by the post you linked in shmups forums I guess the only way to fix any of my SNES (pal one chip or mini) for the OSSC or the BVM is a nearly impossible mod… Is anybody making that 1-resistor mod?

    I will keep using the Framemeister since the ghosting is not noticeable with it.

    And I thought that it could be easy to find a good SNES…

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