[Arm-netbook] evaluating rk3188

[luke.leighton]

On Wed, Jul 31, 2013 at 3:58 PM, Stefan Monnier
<monnier at iro.umontreal.ca> wrote:
>>> a1) It's broken enough that people tell you never to dd into a partition,
>
> Sadly, I didn't hear those people.
>
>> it's possible. all you need is 'don't use MEMERASE ioctl, use bs=16384'.
>
> I did a plain `dd' and now it doesn't boot any more.  It appears to get
> into bootloader mode now.
>
>> bootloader mode, bootloader(currently made by rockchip only) is loaded from
>> flash or USB, it should be possible to read/write RAM, NAND and
>> IDB(bootloader) via USB.
>> rkflashtool can read/write NAND and can read RAM/IDB for now.
>
> After my use of `dd' my mk808b boots into a mode where `rkflashtool'
> accepts to read and write.  Only problem is that the write doesn't seem
> to work: after "erase" I read all 0xff values, as expected, but after
> any "write", I only "read" \x00 values.

 ok can i make a suggestion: see if you can find a copy of the
original 1st bytes on the NAND (whatever they were) and then write
those as the 1st "thing".

 i bet you there is some sort of signature that's supposed to be in
the 1st bytes.

l.