r-jtop xbox 360 jasper

Discussion in 'Modding and Hacking - Consoles and Electronics' started by truemaster1, Nov 5, 2018.

  1. truemaster1

    truemaster1 Enthusiastic Member

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    hello i own an x360 jasper with rgh1.2 hack i use matrix glicher v1 and timing file 12-21 best for my console in order to boot in reasonable time i use a 100nf capacitor and my console is 50% instaboot 50% 2 circle. i wanna try the r-jtop i found precompile files but are no go. the r-jtop is open source does anyone know what program needed to compile it and how to tweak the timings in order to have good timimg for my console here the cource code https://github.com/DrSchottky/R-JTOP
     
  2. Zeigren

    Zeigren Spirited Member

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    You'll need Xilinx ISE and in main.vhd you would edit
    Code:
    constant WIDTH_RESET_START  : integer := 1100757;
    constant WIDTH_RESET_END    : integer := 6;
    I made an example project that might work. Make your edits, click the green implement top module arrow, and then use the .jed file it spits out to program your glitcher.

    I'm not 100% sure the pinout in the ucf file is actually the same, so you might need to check that yourself with a multimeter or that might be somewhere on the internet already.
     

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  3. truemaster1

    truemaster1 Enthusiastic Member

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    thanks ive manage to compile. searching around i found the default values for jasper are
    constant WIDTH_RESET_START : integer := 1100757;
    constant WIDTH_RESET_END : integer := 6;
    constant WIDTH_BYPASS_END : integer := 96000;
    the 2-3 width lines reset end bypass end are the same values for all console revisions. the ucf file is the same as in original source code valid for matrix and coolrunners chips, im using matrix so its probably ok. now i want to ask you, only the reset start value need to be changed +or- in order to have good boot times or and the reset end and bypass end values can be changed +or- too?
     
    Last edited: Nov 7, 2018
  4. Zeigren

    Zeigren Spirited Member

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    No idea, I haven't messed around with it myself yet. I would start with WIDTH_RESET_START though before changing WIDTH_RESET_END. I don't think you need to mess with WIDTH_BYPASS_END.

    Maybe @zeruel85 has some R-JTOP tuning tips?
     
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  5. truemaster1

    truemaster1 Enthusiastic Member

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    im asking about tweaking the bypass end value because my jasper is a stuborn one, no boot without capactor one leg to gnd and the other to pll cable.that indicates that this particular model need more pll output from the glitchchip compare to others. its not a big deal to add the jtag wiring on my already rgh1.2 board. but i wanna be sure that messing with the width values is safe. beter safe than sorry
    mm @zeruel85 seems has some time to visit the site. any way @zeruel85 when you see this share your thoutghs
     
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