Master System 1 & RGB jailbars

Discussion in 'Modding and Hacking - Consoles and Electronics' started by Lum, Jun 17, 2012.

  1. Lum

    Lum Officer at Arms

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    Long story short, I believe Master System is affected by the same vertical bars in RGB as Megadrive. On MD lifting its color subcarrier VDP pin helps. You can dig through this huge topic for MD details.

    What I'd like to know is how to fix the issue when it occurs on a genuine SMS. As opposed to MD's backwards compatibility mode. Any ideas? Thanks.
     
    Last edited: Jun 17, 2012
  2. gorgyrip

    gorgyrip Gutsy Member

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    Just lift pin 6 of the encoder.
     
  3. Hedgeyourbets

    Hedgeyourbets Dauntless Member

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    Sorry to revive yet another old thread, but does this definitely work? and are there any side effects?
     
  4. Druidic teacher

    Druidic teacher Officer at Arms

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    x
     
    Last edited: Jun 22, 2017
  5. Arcade

    Arcade Rapidly Rising Member

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    Sorry to revive this old topic.
    I have a PAL Master System I which has the most intense jailbars I've ever seen.
    It has a SONY 6130 V7040 RGB encoder IC
    IMG_20140122_144250.jpg
    Datasheet here: https://dl.dropboxusercontent.com/u/27485470/sony_6130_V7040_rgb_encoder_ic.pdf

    The IC is not pin-compatible with the CXA, so I guess pin 6 of the CXA matches pin 10 of the V7040. Can anybody confirm this?
    I'll be messing around with it to see if I can fix this issue, any info is much appreciated. Thanks guys!
     
    Last edited: Jan 22, 2014
  6. Mauricio

    Mauricio Active Member

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    I'm also trying to revive a 4 years old topic! Retro forever!

    I did this method. But instead of lift pin 6, I grounded pin 6 as Whitesnake showed here:

    http://www.smspower.org/forums/15082-MasterSystemIIRGBFromMB3614Encoder

    And since I didn't want to loose composite, my technican installed (i have ZERO soldering skills) a switch in the back to turn grounded pin 6 on and off.

    I can tell it worked because using composite, with switch in "off" position I got color and "on "I got just black and white.

    But I can't see any diference in RGB in "on" or "off" using scart and the jailbars remains the same...

    Maybe it's because I didn't lift the pin 6 (grounded it) or because of installed switch?

    Someone have pictures before and after to see what I can expect?

    Mauricio
     
  7. kaliki

    kaliki Spirited Member

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    You can Also use c-sync instead Of composite video as sync in rgb output
     
  8. keropi

    keropi Familiar Face

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    this is what I do and I have no jailbars whatsoever
     
  9. Ergot_Cholera

    Ergot_Cholera Flaccid Member

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    I have Master System Français avec peritel RGB. Yesss!
     
  10. Mauricio

    Mauricio Active Member

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