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Viewsonic G Tablet Development Thread

803 posts
Thanks Meter: 209
By r34p3rex, Senior Member on 3rd November 2010, 08:28 AM
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I think I might have discovered a "bootloader" mode that's akin to the iPod/iPhone's DFU mode. The device shows up on the computer as "APX" when you do this procedure.
  1. Turn the G completely off, then plug in the USB cable.
  2. Hold both Volume buttons and turn on the G (keep volume up pressed)
  3. At this point, your computer should recognize a new device called "APX". The drivers for it can't be located

The Hardware ID for this device has a Vendor ID of 0955 and a Product ID of 7820.

Upon doing a bit of research, APX refers to Nvidia's Tegra platform for smartphones/MID. I downloaded the Tegra 250 development SDK here and it included the drivers for "APX".

Upon installing the drivers, the device is identified as "NVIDIA USB Boot Recovery driver for Mobile devices"

According to this Tegra Development Guide, this recovery mode is used to flash a base Android OS (when used in conjunction with the Tegra Development Kit (hardware!).

So what does this all mean? We have access to the bootloader now. If someone could rip the kernel from our current build, and some how incorporate it into a vanilla image (or the Nvidia developer's image), we could potentially flash it and liberate the G from its horrendous TapnTap UI.

Does any of this make sense? Or am I being totally incoherent?
Last edited by r34p3rex; 3rd November 2010 at 08:56 AM.
3rd November 2010, 07:52 PM |#2  
oRAirwolf's Avatar
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Very nice! Good work!
5th November 2010, 02:03 AM |#3  
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Hopefully Clockwork is released tonight, Im sooo ready to start working a Vanilla port for this thing
5th November 2010, 02:20 AM |#4  
roebeet's Avatar
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Combination post of all firmware updates I've collected
1- Recovery image. Will allow you to back out of any changes to /system:

2- Full zPad image. This is a little risker, will wipe booloader / recovery / system to the zPad. This works, but it's a one-way trip, at the moment. Be aware of that.

3- zPad alternate build 1. Only flashes /system, so you can use bullet one to back out, if need be. Adds root, Market, changes the default language to English:
Last edited by roebeet; 5th November 2010 at 03:47 PM.
7th November 2010, 04:54 AM |#5  
roebeet's Avatar
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New TnT full vanilla restore now available
8th November 2010, 02:27 AM |#6  
roebeet's Avatar
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New TnT Lite 1.00 full firmware mod
8th November 2010, 03:11 AM |#7  
manfly9884's Avatar
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Thanks roebeet for all your hard work and efforts. Tomorrow I will be picking up my refurb tab will be installing your lite version soon there after.
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