Modding a PAL French N64 for RGB. Also, what cable do I need?

Discussion in 'Modding and Hacking - Consoles and Electronics' started by FireAza, Sep 2, 2012.

  1. FireAza

    FireAza Shake! Shake!

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    Sweet vindication eh Bad_Ad? ;)
     
  2. FireAza

    FireAza Shake! Shake!

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    My 75 ohm resistors arrived today! A few hours later, I've RGB modded a N64!

    [​IMG]
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    Had a brief scare when I couldn't get a picture but that was a combination of forgetting to insert the expansion pak and the cart was dirty :p Picture looks amazing, nice bright, crisp colors. Thanks for all your help guys (mostly Bad_Ad though, 'cuz he's awesome like that ;))!

    *EDIT* Out of curiosity, what's the story with the S-RGB A chip in the French N64? I know it was originally used in the SNES, and Nintendo removed it to save on costs, however early French consoles still have them, but why wasn't it connected to the video connector? Did Nintendo originally plan for the N64 to be able to do RGB, but at the last minute, disconnected the S-RGB A from the mainboard before removing the chip itself in a later hardware revision?
     
    Last edited: Sep 21, 2012
  3. Bad_Ad84

    Bad_Ad84 The Tick

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    Originally planned for RGB in france, due to them using SECAM
     
  4. FireAza

    FireAza Shake! Shake!

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    So why didn't they actually connect the chip up?
     
  5. keropi

    keropi Familiar Face

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    I guess they decided to save those 20cents that those components cost in order to complete the circuit
     
  6. FireAza

    FireAza Shake! Shake!

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    You'd think in that case they'd have removed the RGB-1 chip from the design instead of getting 90% of the way to completing the circuit :p Surely a chip is more expensive then a few resistors?
     
  7. keropi

    keropi Familiar Face

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    Maybe they needed it for that revision or they had excess stock from previous machines, who knows? The 101% certain thing is that everything they did they based it in saving money.
     
  8. Bad_Ad84

    Bad_Ad84 The Tick

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    If you have already designed and built a bunch of PCB's - its cheaper to fit the RGB-A chip than redesign the board.... thats pretty obvious. It was designed and removed soon as the original PCB's had been sold.
     
  9. FireAza

    FireAza Shake! Shake!

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    Would simply not including the RGB-A chip have broken something further down the line do you think? What you said about removing it after a PCB redesign makes sense, but I'm wondering what was stopping Nintendo from simple leaving that area of the PCB empty.
     
  10. Bad_Ad84

    Bad_Ad84 The Tick

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    s video and composite comes out of the RGB-A chip too
     
  11. FireAza

    FireAza Shake! Shake!

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    Ah, and then it gets converted from RGB to a composite signal? Gotcha. So what did the job after Nintendo got rid of the RGB-A chip?
     
  12. keropi

    keropi Familiar Face

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    I tried yesterday the n64 on my Trinitron 14" tv and I get faint/transparent horizontal lines across the screen, it's not bad but it's annoying when you notice it... the thing works perfect on the lcd sets I tried... could it be a case of a resistor needed on the c-sync line or the sony tv does not like the n64?
     
    Last edited: Sep 24, 2012
  13. ShadowZero

    ShadowZero Spirited Member

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    Does anyone know which pins are Y and C? I'd like to revive s-video on the FRA N64 :)
     
  14. ShadowZero

    ShadowZero Spirited Member

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    Ok, summary on the S-RGB N64 mod:
    One open question for me, does the 'NTSC' RGB cable (so with 3x 220uF caps) work with the S-RGB mod, or does it deliver a dark screen as with the PAL SNES?
     
  15. Bad_Ad84

    Bad_Ad84 The Tick

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    C = pin 12
    Y = Pin 17

    Dont use caps in the cable. You should have 75ohm resistors though

    Little late, but the ENC-NUS
     
    Last edited: Jul 30, 2013
  16. ShadowZero

    ShadowZero Spirited Member

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    So if I want to use the 'NTSC' RGB cable, as with the NTSC RGB modded N64, I'd have to go with the VDC + booster mod on a FRA N64? (I'd like to use the same RGB cables for my GC/FRA N64/NTSC N64).

    Does anyone know how the VDC + RGB booster mod compares to the S-RGB mod? (my JAP RGB N64 seems to look the same as my FRA SRGB N64...)

    @Bad_Ad84: you know where I can find the complete pinout for the VDC and S-RGB chip? (what would the best place be to get s-video from, with the FRA N64?)


    EDIT:
    Got a new FRA model and did the VDC mod (instead of S-RGB) with THS7314 booster and I don't see a difference in image quality compared to the S-RGB mod. I can now use the same RGB cable as with the NTSC RGB modded N64 :) (to quote mmmmonkey: "this makes me happy for some silly reason" ^____^ )
     
    Last edited: Aug 20, 2013
  17. beanieboy182

    beanieboy182 Member

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    i have a french n64 fra-001 and used the cut trace to pin V (n64 board) and wire from theBA6596F S-RGB A chip to get red green blue (with 75ohm resistors) and csync (actually ended up leaving it on the Y Luma (pin 17) but either that or pin 18 csync didnt change the quality on my 55" LED tv
    i would say its pretty poor quality
    i think my snes looks better quality using the same cable mind
    anyone have this problem of bad quality after using RGB mod ??
    it doesnt look much better than composite to be honest.
    i will try and get some pics but its hard!
     
  18. beanieboy182

    beanieboy182 Member

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    scrap that i changed it back to csync because im not allowing that to be something thats different from everyone elses :D
     
  19. beanieboy182

    beanieboy182 Member

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  20. beanieboy182

    beanieboy182 Member

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    IMG_1357.JPG
    here is the sniper rifle from goldeneye
    does this look normal to everyone ?
     
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