Requesting Firmware Dumps from Coby Generation 3 Devices

Discussion in 'Coby Generation 3 Development' started by steev, Apr 30, 2012.

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  1. steev
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    steev Member Developer

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    Disclaimer: Due to users continuously bricking their tablets by attempting to use the Livesuite ROM images in this post, the links to those images have been removed. System dumps are unaffected.

    ----------------------------------------------------------------------------------------------------------------

    I am requesting firmware dumps from Coby Generation 3 (MIDxx42) devices using the Allwinner A10 SoC.
    With these I should be able to create firmware restore images to be used for unbricking.

    Firmware dump instructions here:
    http://www.androidtablets.net/forum...mps-coby-generation-3-devices.html#post205970

    Then upload the *.img files and system.tgz you pulled

    Thanks

    Coby doesn't provide firmware downloads for these tablets, which is why I'm trying to put these together.

    UPDATE:

    WARNING:
    I have tested these on my Novo 7 Elf tablet which has similar hardware and it worked, but I can't guarantee they work on the Coby tablets since I do not have the hardware to test.
    Therefore, I recommend that somebody with an already bricked tablet be the first to try it.


    Firmware restore images for Coby Kyros 7042:

    It was discovered that Coby is using 2 different touchscreens in the 7042 models, goodix and ft5x_ts.

    The firmware below should support both touchscreens:
    coby_7042_4.0.3_dual_ts.zip (Thanks David for the dump), Confirmed working by David

    The following firmware only supports 7042 models with Goodix touchscreens:
    coby_7042_4.0.3.zip (Thanks to Joe88 for providing the dump)
    md5: 3c014061580d74c4c6b112204f3deb92

    Firmware restore images for Coby Kyros 9742
    coby_9742_4.0.3.zip (Thanks to RedDeer for providing the dump), Confirmed working by swalker5906
    md5: 71a31c954e164a0bb7f19bbd1a143d7a


    Flashing instructions:
    - Download LiveSuite, this is the flashing software for A10 devices
    - Run LiveSuitePack.exe (a bunch of files will be extracted to the current folder, so best to create a new one)
    - Now run livesuite.exe
    - Choose "SelectImage"
    - Choose the coby_kyros_4.0.3.img
    - Now you need to put your device in upgrade mode, to do so:
    1. power off the device
    2. Press and hold any physical key except the power key on the device(ie, press and hold Vol+ key, still holding in 3 and 4)
    3. Connect the tablet to your PC via USB cable
    4. Repeatedly press the power button until a popup dialog shows on your computer screen
    - Now follow the on-screen instructions

    If this works I look forward to seeing some custom ROMs from the Coby community :)
    Last edited by a moderator: Dec 11, 2012
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  2. l8asusul
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    l8asusul Junior Member

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    I read that my 7042-4 has the Cortex A8 CPU. Do you still want the firmware dump? Where can I find the process to perform said dump?
    Thanks
    Don
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  3. steev
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    steev Member Developer

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    Thanks! The 7042 is one of the firmware dumps I'm looking for.

    Attached is a script that will dump your firmware.

    Instructions:
    - Install the ADB drivers for your device. (This guide here should work)
    - Root your device (see here: http://www.androidtablets.net/forum...s-coby-generation-3-devices-2.html#post206352)
    - Download and unzip the attached file
    - Run dump.bat
    - Click "allow" if the Superuser dialog pops up on your tablet.

    The firmware files will be in the "dump" folder.

    Attached Files:

    Last edited: May 3, 2012
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  4. Joe88
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    Joe88 Junior Member

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    are the

    bootloader.img, boot.img, recovery.img

    supposed to be 0kb?

    I got an error near the end saying it couldnt "tar mount error(do you have root?)"

    the system file is 104MB

    I'll upload it

    edit: http://www.mediafire.com/?atgat89whf7mqc3

    (I made an error on the model number, just change it :p )
    Last edited: May 2, 2012
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  5. steev
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    steev Member Developer

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    Damn, I assumed it would already be rooted like the base Allwinner firmware, but I guess Coby changed it.

    Your system dump might be usable though.
    We will need root to dump the others.
  6. Joe88
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    Joe88 Junior Member

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    Last edited: May 2, 2012
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  7. steev
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    steev Member Developer

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    Thanks!

    Your system dump looks good.
    I will try to come up with a way to root this firmware so the other files can be dumped.
  8. steev
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    steev Member Developer

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    edit: does not work
    Last edited: May 3, 2012
  9. davidmatt34
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    davidmatt34 Junior Member

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    When you say insert a "USB device" do you meen to connect it to the tablet?
  10. davidmatt34
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    davidmatt34 Junior Member

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    This is what I got when I ran the .bat

    Waiting for device...
    Pushing files...
    push: data/Superuser.apk -> /sdcard/Superuser.apk
    push: data/su -> /sdcard/su
    2 files pushed. 0 files skipped.
    3613 KB/s (865867 bytes in 0.233s)
    failed to copy 'usb_modeswitch.sh' to '/system/etc//usb_modeswitch.sh': Read-onl
    y file system
    Unable to chmod /system/etc/usb_modeswitch.sh: Read-only file system
    Finished
    Press any key to continue . . .
  11. steev
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    steev Member Developer

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    Yes.

    Thanks for trying.

    That's what I feared, Coby did mount /system read-only.
    Will have to try something else.
  12. steev
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    steev Member Developer

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    Ok here is root attempt #2 if anybody will kindly try.
    I am fairly certain it will work on the 7042, might need to be modified for the others.

    If this works I take no credit, the root exploit was done by saurik.
    The only thing I did was figure out the offsets for Coby's run-as bin.

    Instructions:
    - Install USB drivers like in earlier post
    - Download and unzip attached file
    - Run root.bat

    If it worked you should now be rooted.

    Hopefully this one works, and sorry about the previous failed attempt.
    Last edited: May 3, 2012
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  13. Joe88
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    Joe88 Junior Member

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    I got this error

    [​IMG]

    Attached Files:

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  14. davidmatt34
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    davidmatt34 Junior Member

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    Bummer....again
  15. steev
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    steev Member Developer

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    Ok that is good news, the exploit did work.
    I just need to use 'busybox cp' in the root script.

    I'll fix the script really quick.

    Thank you
  16. steev
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    steev Member Developer

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    Third time's a charm

    I have also updated the fw dump script to request root permissions.

    Attached Files:

    Last edited: May 3, 2012
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  17. Joe88
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    Joe88 Junior Member

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    it rooted it, super user is installed

    trying the firmware dump again

    I tried the root explorer option in es file browser and it said test failed, feature doesnt work on this phone
    not sure if that means anything

    edit: firmware dumped fully now
    will upload everything for you
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  18. steev
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    steev Member Developer

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    That error usually happens when ES explorer is cooked into a ROM. I think it's a bug in the app.
    I believe you are rooted though, since it was able to dump the boot files.
  19. Joe88
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  20. RedDeer
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    RedDeer Junior Member

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    Last edited by a moderator: Dec 11, 2012
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