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  1. #91
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    catymag's Avatar
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    Quote Originally Posted by youssev View Post
    Hi,
    I know, thats an old stuff, but is there a JNX patch working for a Colorado 300 ?

    You can read from the link given in post one:

    Code:
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    This format is supported by the following Garmin devices: Astro 320, Colorado 300/400, Dakota 10/20, Edge 800, Etrex 20/30, GPSMAP 62/78, Montana 600/650, Oregon 200/300/400/450/550, Rino 610/650/655.

    Firmware versions supported by the patcher
    Colorado 300/400 3.50, 3.60, 3.70
    Code:
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    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

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  3. #92
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    Without changing number and over 2.20 it went smoothly as well. Now Edge 800 is running 2.40 with jnx support.

    Quote Originally Posted by AlexWhiter View Post
    I see.

    Could you please try to upgrade now to 2.40 without changing the version number in the patcher?

  4. #93
    Navigation software expert AlexWhiter's Avatar
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    Quote Originally Posted by 1ilya View Post
    Without changing number and over 2.20 it went smoothly as well. Now Edge 800 is running 2.40 with jnx support.
    I'll check the version changing functionality.
    Thanks for reporting this bug!

  5. #94
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    @AlexWhiter
    Are you talking about changing firmware version or some other version?

  6. #95
    Navigation software expert AlexWhiter's Avatar
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    @kunix
    I was talking about changing the FW version.
    Starting from version 2.9, the patcher can adjust the firmware version by the specified value (the same feature as in RGN Tools).
    But it seems that there's something wrong with this adjustment.

    I've checked the patcher, however, I could not find anything abnormal both in the code, and in the results it produces.

  7. #96
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    How do you find the FW version?
    As for me, at first I determine FW's base address (exact method depends on firmware type, most frequently I substract offset of 5A A5 from 2nd dword of FW), and then I use the fact that 3rd and 4th dwords point to HWID and SWVER respectively.

  8. #97
    Navigation software expert AlexWhiter's Avatar
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    In fw_all.bin, my code does the same as you've described.
    But to change the FW version does not only mean to change it in fw_all.bin, but also in all other subfiles in GCD container.
    So it's necessary to enumerate them all and to change their headers in GCD.

  9. #98
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    ok, I understand now.
    UPD
    Did you think about patching the number that's used as RSA module? I think it's going to have very stable signatures
    Last edited by kunix; 24th October 2011 at 21:39.

  10. #99
    Navigation software expert AlexWhiter's Avatar
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    Quote Originally Posted by kunix View Post
    Did you think about patching the number that's used as RSA module? I think it's going to have very stable signatures
    I'm not sure I understand what you are talking about

  11. #100
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    I've read at your site that JNX files are locked with asymmetric encryption. I suppose that RSA is used because Garmin have already used RSA in GMA protection. If you replace RSA module number (which is the biggest part of public key), you can create RSA signatures by your own.

 

 
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