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  1. #321
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    catymag's Avatar
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    Quote Originally Posted by popotnik View Post
    Do we have UAT FW of nuvi 37xx or 34xx?
    I have all the 34xx firmwares since 2.10,and 37xx since 2.50 , but no UAT
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    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
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  3. #322
    Navigation software expert Kanopus's Avatar
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    @Neil: could you do a test? Turn on hidden tracklog on all your nuvis, take them for a ride and then analyze tracks to see if there are real differences in calculated position. I mean, simply check if this is a real or imagined problem
    Thanks, Kanopus

  4. #323
    Navigation software Moderator

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    I've found in fw_all.bin of 37xx and 34xx some 32KB piece of data which is probably a GPS firmware.
    Here is a 34xx v7.90 firmware that has this piece of data replaced with one copied from 37xx v5.00.
    Also the GPS firmware version is increased by one (it's just a hardcoded number not related to the GPS firmware).

    If someone is not afraid of sacrificing his 37xx device for the sake of science, then I would like to know if the displayed GPS firmware version has changed and if the GPS accuracy is better (and if it works at all!).

    I'm not sure what I've just patched so don't flash it unless you're ready to kill your device!
    This won't break pre-boot mode for sure. But I have no idea how GPS chip works with wrong firmware version.
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    Last edited by kunix; 2nd May 2013 at 16:37.

  5. #324
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    Does anyone know which gps chip is used in 3490 and 3790. ?
    I've read somewhere that 3490 has a combined gps/bluetooth chip but cannot find source of info.
    The difference between stupidity and genius is that genius has its limits.
    Albert Einstein.

  6. #325
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    I think it's true. But then it's probably also true for 37xx, as they seem to use the same chip mt3328. This chip name is hardcoded in the firmware as well as the GPS software version (well, I'm not sure yet this number is the GPS SW version, but it totally looks like it is). This is the reason why I was inclined to think that GPS software is embedded in fw_all.bin.

  7. #326
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    file.html

    file.html
    Attached Images Attached Images
    • File Type: jpg 1.jpg (23.2 KB, 19 views)
    • File Type: jpg 2.jpg (23.3 KB, 23 views)

  8. #327
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    @ana550

    Is GPS accuracy better?
    If you wish, you can [Only registered and activated users can see links. ]

  9. #328
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    ana550
    Ok, so that number was really a GPS firmware version. Now what about GPS accuracy?
    Also I wonder what happened to the letter "u" in the word nuvi. Firmwares on both screenshots are 34xx right? (on 37xx GPS firmware version is somewhere between 2.20-2.60).

  10. #329
    Garmin/GPS Systems GMod.

    Neil's Avatar
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    Can't do any tests today, other big fish to fry. Great work kunix and 'big karhoonies' shown by ana550 in being 1st to try (although i reckon you were in safe hands and i'm prepared to do it too on this weekend).

    What 'u' kunix?
    'Thanking Posts' are banned. To thank someone, and/or to see hidden links and content, use the [Only registered and activated users can see links. ] button below left of the helpful post then refresh your browser [F5 key]. 'Thanking Posts' are banned.
    Please don't spam. Posts serving no purpose other than to thank or to ask about hidden links are trashed or deleted, it's GPSPower's policy. Please don't spam.
    [Only registered and activated users can see links. ] should make their first post as a new Intro Thread in [Only registered and activated users can see links. ].

  11. #330
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    in nvi is the same on picture 1 and 2, but becouse picture 2 is smaller then picture 1 its look like - is above u letter.
    If you wish, you can [Only registered and activated users can see links. ]

 

 
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