Re: MDOC G4 - md8832

[Cristobal Rosa <cristobalrosa@xxxxxxxxx>]

Hi Eric,
thanks for answering,

It is a pretty hard, took a couple of weeks studying how to do it and I can
not find solution.
 I tried the following:

- Using pdocread (from xda developers), but some partitions of the memory
are locked.
- Using a JTAG connection, but there is a switch circuit before the micro
and i can't access to the memory. I tried to disable this switch by writting
some pxa register, but in user mode i can't change the value of this
register. .... I don't know how i can access in supervisor mode to the pxa
...
I'm looking for TrueFFS SDK and BDK but I have not yet achieved.

umm..... i'm going crazy....







2009/2/25 Eric Miao <eric.y.miao@xxxxxxxxx>

>  On Tue, Feb 24, 2009 at 8:20 PM, Cristobal Rosa <cristobalrosa@xxxxxxxxx>
> wrote:
> > Hello guys,
> >
> > First, excuse me for my english.
> >
> > Well, I've PDA with an Intel Bulverde pxa270 processor with an MDoc
> MD8832
> > (Disk on chip) flash memory. I need to modify the bootloader but i can't
> > access to it.
> >
> >  Can someone help me?
> >
>
> Well, you have a long way to go for that.
>
> Normally, vendors would do some work to prevent end user modifying (or
> inspecting) the internal from their final products. They said it's to
> protect
> the device from being bricked, but that's not true, they don't even want
> their binary to be disclosed :)
>
> So the first step you have to figure out is how to get access to that.
> If you have a ready OS on it, you can search for tools on that OS to
> see if you are able to read/write directly from the OS. (direct write
> is dangerous to make it bricked, you are warned). That way, you
> figure out the flash layout and possibly more information.
>
> Alternatively, you can try find if there is a JTAG connection, however,
> the device could be possibly fused to prevent JTAG debugging, but
> at least you can try your luck. A serial port may further help during
> your later debugging.
>
> Anyway, the first source is google, and see if someone else has
> already been doing this.
>
> > Thanks in advance
> > -------------------------------------------------------------------
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>
>
>
> --
> Cheers
> - eric
>
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