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  1. #31
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    Quote Originally Posted by Pigom View Post
    ...Now I can't use my own marine charts anymore. I would like to go back to v 3.80 (the last one whitch is working) but I can't nowhere find it...
    Same situation here

    Quote Originally Posted by Cnfhbr View Post
    @ferabella

    For the GPSMAP 721 unit, there is no point in going back to the old firmware, just patching your custom map with GCCMaps0.0.3 is enough.
    Could you please direct me to some procedure or topic showing how to do it? Any link would be excellent, i am starting search çing that right now anyway
    Sounds promising
    It is a map done with cgpsmapper originally
    Last edited by Boki; 8th June 2022 at 01:34 PM. Reason: merged two consecutive posts, approved, quote shortened ...

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  3. #32
    Navigation software expert Firmware downgrade for 721xs to recognize custom maps
    Firmware downgrade for 721xs to recognize custom maps
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    Quote Originally Posted by ferabella View Post
    Could you please direct me to some procedure or topic showing how to do it? Any link would be excellent ...
    For example:
    Code:
    Please Login or Register to see the links

  4. #33
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    I have installed GCCMaps0.0.3 (from the link above in boote-forum) and Visual Basic 6 Runtime Files (from sourceforge)
    I copy the .img that show "map format not admitted" in gccmaps directory.
    I drop the *.img file over the gccmaps program and it says "File patched correctly" in some .img and

    I07246EF: No need to patch the tile
    I07246FA: No need to patch the tile

    in another .img

    The .img is in the same directory of the GCCMaps, i pick it and drop over the GCCMaps.exe and the messages appear but no change in file, modified date of file, like if nothing would have been doone to the .img

    I copy the .img to sd and put it in 721 software firmware version 6.80, not 6.50 not 4.2. This is the last one that blocks returnning to old firmwares and maybe blocks gccmaps too.
    Message "map format not admitted" appears again


    What am i doing wrong?

    It is correct i pick the file in the gccmaps directory as it were "modified" or should i pick it from other place?

    May be that version 6.80 introduces new system to block the possibility to patch .img´s?
    Last edited by ferabella; 10th June 2022 at 12:21 PM.

  5. #34
    Navigation software expert Firmware downgrade for 721xs to recognize custom maps
    Firmware downgrade for 721xs to recognize custom maps
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    Quote Originally Posted by ferabella View Post
    What am i doing wrong?
    You can PM me your source custom map and the one supposedly patched by you, and I'll see what's wrong.

  6. #35
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    hi everyone.

    Could someone please help me where i can get old firmware versions for gpsmap 557xs.
    I am stuck on version 6.4 and it will not update.
    something weird happening with device as after a factory reset when i make any changes and reboot device, it has forgotten all the changes.
    I delete all the waypoints and after re-boot they are all back...
    I want to try downgrade to older versions and try upgrade from there.
    Could you point me to older version and maybe even version 6.50?
    Thanks

  7. #36
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    Try here to start with:

    [Only registered and activated users can see links. ]

  8. #37
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    That is the new version only which i have already. Thanks anyway...

  9. #38
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    Quote Originally Posted by kornynz View Post
    Could someone please help me where i can get old firmware versions for gpsmap 557xs.
    ...
    Could you point me to older version ...?
    Do you know HWID of the 557xs?
    If HWID=1665 or 1667, try testing the FWs from [Only registered and activated users can see links. ].
    Last edited by VadimK; 5th March 2023 at 02:15 PM.

 

 

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