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  1. #11
    Senior Member rik70's Avatar
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    @kunix
    I think it will matter what the GCD you do, the basic firmware is damaged from atypical FW. Will be essential to create the correct boot files... Thank you for your help

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  3. #12
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    Quote Originally Posted by kunix View Post
    @ddabcd277
    Does Rik need a cure firmware that doesn't read anything from internal flash? Then I can try my patch
    @ kunix

    No, better. The idea is to flash memory with FTL which would reorganize the information. I know the trick from Alex.

  4. #13
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    Hi ddabcd277
    For 24xx / 25xx Asian (and the same hwid ie 2465 hwid1327 - TH-Sg/My-TWN)
    Can FTL change the region ?
    (Tested :: No effect if I flashed 2465TH with 2465Sg/My firmware.., Nuvi won't display Sg/My JCV.)
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  5. #14
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    @rik70
    @ddabcd277
    Hm, I don't understand what is damaged in the device and what is FTL. Also there are no 'boot files' at all. There are two regions in flash memory, one for fw and one for bootloader. I'm not sure whether x-loader is located in flash as I have controversial information. There is also the largest region in flash used to store internal filesystem. If internal filesystem is corrupted we can restore it either by flashing cure firmware and then formatting from Windows or by flashing correct filesystem header (Alexander's method).

  6. #15
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    @ kunix

    That is what I meant - flash filesystem with filesystem header. (Alexander's method) Very cleaver way!!! 99% is fixing rebooting/freezing if the problem is coming from the memory - problematic files, corrupted FTL (I am calling the filesystem - FTL , bad formatting etc. Think it is much better than patching and playing with the main firmware. I see that you also know the method. That's nice.

    Have a feeling everything is located in the memory - x-loader, bb, nvm etc in nuvi 265w. What other place can be located?

    @ SiamMarine

    Don't know never seen an asian unit. But you can experiment.

  7. #16
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    @ddabcd277
    Wow! We were talking about same things Personally I don't like flashing filesystem headers. It seems unreliable to me, unless you perfectly understand what those headers contain. Otherwise you have to flash entire filesystem, which will take too long time. Also you have to dump it first which will also take a while. As opposite, patching firmwares is something that I understand And it also helps, at least for old nuvis.

    Quote Originally Posted by ddabcd277 View Post
    @ kunix
    Have a feeling everything is located in the memory - x-loader, bb, nvm etc in nuvi 265w. What other place can be located?
    I think flash is never mapped to RAM. So first commands executed by processor after reset have to be somewhere else. Also I've seen x-loader at address 0xA0000000 on nuvi 13xx. Some board config values are taken from this address. And it doesn't look like RAM address, because:
    1)RAM is usually continuous on garmins (even after MMU configuration)
    2)RAM addressess are quite different on 13xx.
    Last edited by kunix; 1st October 2011 at 17:13.

  8. #17
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    Quote Originally Posted by kunix View Post
    @ddabcd277
    Wow! We were talking about same things Personally I don't like flashing filesystem headers. It seems unreliable to me, unless you perfectly understand what those headers contain. Otherwise you have to flash entire filesystem, which will take too long time. Also you have to dump it first which will also take a while. As opposite, patching firmwares is something that I understand And it also helps, at least for old nuvis.
    Yes, we are talking about the same thing. Just different approaches. I abbsolutely agree with you - flashing filesystem is unreliable and dumps are too big. But I have noticed that if the so called "cure" firmwares (changing files extensions and 0:/, 1:/ (neadrenalin's method)) don't give access to the memory this is maybe the only way for fixing. (except if you don't know how to jtag a nuvi). Of course nothing to be loosed if patched firmware with disabled Open file function (kunix method) is used. Which is much clever way.

    About the x-loader...Sorry I really don't know.

    Edited.

  9. #18
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    Quote Originally Posted by ddabcd277 View Post
    BTW What is "MMU configuration"?
    Here I was talking about configuring Memory Management Unit by firmware. FW remaps some peripheral registers, makes interrupt vectors, bootloader and fw addressess readonly and so on... I didn't investigate deep in this process because lack of time and knowlegde. Have to read ARM Architecture Reference Manual first

  10. #19
    Important User Alexander2010's Avatar
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    aekhong, have you physical access to one SG\MAL 2465? May be, we can dump other regions and enable encrypted jcv on EU and TH devices? I need so Garmin Sync from SG/MAL and Thaiwan devices (I can't find this util in Web, but i know this util is preloaded on some SG and Taiwan devices).
    Sony SL10=>HP 1930=>1940=>Toshiba e755=>Loox N520=>Acer n311+Huawei ETS688=> Fujitsu-Siemens Loox N560 WM6=>Dell Axim x51v=> Huawei s7 s-105 (FW 2.2.2 Sweden) + Nokia N78. Garmin Forerunner 405. I love flash Garmin devices.

  11. #20
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    More about 2465Asian here --> [Only registered and activated users can see links. ]
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