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Thread: PAL Turbografx 60hz mod

  1. #1

    PAL Turbografx 60hz mod

    Is it possible to perform a 60hz mod on a PAL Turbografx? Or its stuck at 50hz forever

    Thanks ^-^

  2. #2
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  3. #3
    Hmmm I cant see anywhere where it says if anyone managed to do a 60hz mod :(

  4. #4
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    Quote Originally Posted by Everblue View Post
    Hmmm I cant see anywhere where it says if anyone managed to do a 60hz mod :(
    It does mention it, through some broken english: http://nfggames.com/forum2/index.php...sg8613#msg8613

    Quote Originally Posted by Moosmann
    Hmmm, the crystal from the PAL Turbografy is clocked 17,7344 Mhz...
    As far as i know the NTSC Turbografx/PC Engine ist clocked 21,47727 Mhz.

    I remember me from the 1Chip SNES 50/60 Hz Mod
    http://markus.brandel.bei.t-online.de/1Chip-SNES.bmp

    Maybe you can get 60 Hz to change the 17,73.. Mhz xtal to a 21,47.. Mhz xtal ?

    The other crystal I think its only for the Sony CX Videoencoder PAL Video signal.

    Bye Markus
    Quote Originally Posted by chaoticjelly
    I have acquired a PAL Turbografx.

    Opening it reveals the same insides as the pictures above, I replaced the crystal with one of correct frequency for 60hz - I receive a black and white (NTSC?) picture over composite video.

    I RGB modded the PAL Turbografx and I receive a colour picture over RGB.
    As far as I understand, you need to replace the 17.73MHz clock crystal with a 21.47MHz clock crystal in order to switch it to 60Hz.

    Then, once you've done that you need to follow this guide: http://www.mmmonkey.co.uk/console/pce/rgb.htm to tap RGB off. You may also have to amplify the signal using this guide: http://www.mmmonkey.co.uk/console/pce/amp.htm


  5. #5
    Ah thats great thanks - any idea where can I get such a clock crystal to replace?
    Last edited by Everblue; 08-02-2012 at 02:30 AM.

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    Quote Originally Posted by Everblue View Post
    Ah thats great thanks - any idea where can I get such a clock crystal to replace?
    A broken NTSC TG16 or PCE. You can often find broken consoles on ebay for next to nothing. Also, I believe the SNES uses a 21.47MHz clock as well.

  7. #7
    Oh. Alright, thanks!

  8. #8
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    Originally Posted by chaoticjellyI have acquired a PAL Turbografx.

    Opening it reveals the same insides as the pictures above, I replaced the crystal with one of correct frequency for 60hz - I receive a black and white (NTSC?) picture over composite video.

    I RGB modded the PAL Turbografx and I receive a colour picture over RGB.
    This typically happens when the frequency is increased to 60Hz, but the color coding in the composite signal still has its PAL properties.
    Some television sets (Sony trinitron) are capable to recognise the PAL color coding, while operating on 60Hz and then RGB is not needed to display a color picture (although in lower quality ofcourse).

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    Quote Originally Posted by Chilly Willy View Post
    A broken NTSC TG16 or PCE. You can often find broken consoles on ebay for next to nothing. Also, I believe the SNES uses a 21.47MHz clock as well.
    You can get them from electronics suppliers like Mouser too, no need to scavenge busted consoles.

  10. #10
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    Quote Originally Posted by ApolloBoy View Post
    You can get them from electronics suppliers like Mouser too, no need to scavenge busted consoles.
    That depends on how accurate it needs to be. For example, Mouser only has a 21.4 MHz osc, not 21.47 MHz. If it's "close enough" then you can get it from Mouser. If it has to be exact, you can't.

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    Quote Originally Posted by Chilly Willy View Post
    For example, Mouser only has a 21.4 MHz osc, not 21.47 MHz. If it's "close enough" then you can get it from Mouser. If it has to be exact, you can't.
    You sure about that? I found this on Mouser: http://tinyurl.com/8ozxduk

  12. #12
    Very interesting... so I can replace the crystal with that one? Also, how hard is it to replace it? Thanks!

  13. #13
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    Quote Originally Posted by ApolloBoy View Post
    You sure about that? I found this on Mouser: http://tinyurl.com/8ozxduk
    I was looking at oscillators... that's a crystal. Does the TG16 need a crystal or a clock? If it needs a clock, you'd need a few gates and passive devices to go with that crystal to make a clock cirucit.

  14. #14
    http://www.otakus-store.com

    Those guys there are modding PAL consoles to 60hz.... I wonder how they do it? I'd try them out but the site is in French (I sent them an email but I don't know if they are France only)

  15. #15
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    It's mainly useful for owners of TVs that accept PAL 60, yet neither RGB or NTSC 60. Otherwise may as well start from a US Turbografx.

  16. #16
    I was mostly interested because you can get PAL brand new PC ENgines for cheap.

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