Poor quality RGB on French N64 ?

Discussion in 'Modding and Hacking - Consoles and Electronics' started by beanieboy182, Apr 4, 2014.

  1. beanieboy182

    beanieboy182 Member

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    i have a nus-001-fra model n64
    ive connected pins 24 blue 22 green 20 red and 18 csync of chip S-RGB A (BA6596F) like this
    n64rgbdiagramv2.jpg
    With the 75ohm resistors on the colour lines
    Cut the V line where the Red line is (checked with multimeter to make sure it had been cut) Cut is very tiny and perfect....also not cut anything else.
    i am using this on a pal snes scart cable hooked up to a 55" samsung 6 series model led 3d tv.

    This is the sort of quality i should be expecting ?

    IMG_1357.JPG

    Thanks for the help!

    (posted here because i got told off for posting in old posts)
     
  2. martin_crickett

    martin_crickett Rising Member

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    This could just be your TV, I know my Samsung 3D LED doesn't look great with old consoles, even via RGB. You may find it looks beautiful on a good old CRT :)
     
  3. Hazard

    Hazard Newly Registered

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    I didn't know that any european n64 has RGB. The french model is the only?
     
  4. gladders

    gladders Robust Member

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    Yes but it has to be modded first.
     
  5. beanieboy182

    beanieboy182 Member

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    yeah only the nus-001-fra model has the S-RGB chip in no other pal console has this chip.
    but the quality of picture sucks on this 55" :( but snes and mega drive look stunning! just like playing on a CRT :D
    Is there anything i could try to make the image sharper / clearer?
    It all looks like there are a lot of pixels jumping around in characters faces if their not within range ( closer to the player )
    also games like mario kart do this same effect..
    far away you cant see all but a mix mash of pixels as their faces but once they come into view it clears up a lot.
     
  6. APE

    APE Site Supporter 2015

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    Probably the built in upscaler sucking complete ass. Couldn't hurt to toss in a THS7314 amp to bring the signal levels up but I really doubt that'll make the picture much better.
     
  7. beanieboy182

    beanieboy182 Member

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    crap! i didnt really want to add another amp...isnt the S-RGB chip an amp ?
    i guess it could be a really terrible amp.
    Looks like my wish to play N64 on my 55" just like i do with snes and megadrive have ended :(
    Any other ideas on the cards??

    I saw this picture on a french website that someone modded to work with RGB but check where they connected the Csyncout to pin 3 (S/12V)
    wrg.jpg

    Would this actual work ? Sounds like it might send 12V through the S-RGB Csyncout also ?

    Or after taking a look at the picture is the / right next to (S / 12v) actually a cut trace to pin S ?
     
    Last edited: Apr 4, 2014
  8. Bad_Ad84

    Bad_Ad84 The Tick

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    You dont need another amp. The S-RGB chip is an amp.
     
    Last edited: Apr 4, 2014
  9. beanieboy182

    beanieboy182 Member

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    so im pretty much up the creek ?

    Also did you have any idea about the picture i posted ?
     
    Last edited: Apr 4, 2014
  10. Bad_Ad84

    Bad_Ad84 The Tick

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    It could be your TV or your expectations. The N64 RGB picture isnt super amazing in the first place.
     
  11. beanieboy182

    beanieboy182 Member

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    ive seen some youtube videos and they all seem to get amazing picture quality (from a LCD of around 42") maybe its the camera their recording the video with making it seem better.
    its pretty hard to compare with them as most people buy the NTSC n64 and install the RGB amp mod.
    With this Fra N64 it obviously has the amp installed already and ive just reconnected it to the outputs.
    I did wonder if connecting sync to pin S / 12v would actually do anything to the quality ?
    thoughts?
     
  12. Calpis

    Calpis Champion of the Forum

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    This won't make a difference visually but on an electrical note C-sync needs a 75 ohm resistor as well. Plus you *probably* should be using series output capacitors here (220 uF +) since the DC offset current might be too large for the chip to handle comfortably.

    I imagine the blurriness is in some part the S-RGB's bandwidth and your TV's interpolation.

    N64 textures are very blurry themselves but the video exiting the DAC doesn't appear to be significantly filtered so ideally N64 video has distinct and "sharp" pixels that make up a mostly blurry game image.
     
  13. Bad_Ad84

    Bad_Ad84 The Tick

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    No it wouldnt.

    Really all you can do is compare composite to RGB and see how you find it.

    The picture isnt stunning though, even via RGB. Its certainly an improvement over composite, but its not like the night and day difference of some consoles.
     
  14. beanieboy182

    beanieboy182 Member

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    ah ok :) thanks
    i may just get a really big old CRT or get a sync strike and scan line generator
    possibly that would help? ?
     
  15. Bad_Ad84

    Bad_Ad84 The Tick

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    syncstrike wont help
    scanlines may improve things
     
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