[s1mp3-dev] Actions documents arrive

[seventh guardian]

On 6/9/06, Legolas <legolas558 at email.it> wrote:
> Jeroen Domburg ha scritto:
>
> >- TROM
> >ATM, we don't know what the TROM does or where it is on the bus. For all
> >we know, it could even not exist in the ATJ2085.
> >
> >
> I guess we can understand more about TROM better digging in what we
> already have. It is not mentioned anywhere but there must be a place
> where they talk about it. It's just a feeling anyway.
>
> >- ICE
> >Two things: Either we reverse-engineer it or we ignore it.
> >Reverse-engineering already is on its way (********) but with a 96-bit
> >instruction set and no real way to check if the brom is being written to,
> >
> >
> I had really stopped /learning/ when I thought we could get the full
> specs. Dreamer. I'll join back Ali's efforts

Hi!

This is a long shot, but have you tried I2C for the ICE protocol? I
mean, if I was to produce a chip specifially with I2C support, I
wouldn't double the hardware, so I would use the same hardware for the
ICE. Try to read some registers and see what you get back..

Cheers!
  Renato


>
> >this could take some time. We could try and disassemble some binaries we
> >'found' that access the ATJ2085 debugging board, too, perhaps they contain
> >the ICE stuff.
> >
> >
> *FCPGA *:-\
>
> >- DSP
> >
> >
> I feel the knowledge stands there, somewhere.
>
> >Secondly, to find out the ice protocol, any hackers with disassembling
> >skill might want to take a look at the nandflash program we have lying
> >around, that seems to be the smallest program that uses the ICE board to
> >do something. It might lead us to clues concerning the ICE.
> >
> >
> Yes, and a comparation with the main program would bring in more clues.
>
> >We might be able to pull off support from application writers if we write
> >our own mini-OS as a seperate app: if you'd then select e.g. voice
> >recording from the menu, an app loads which trashes the Actions firmware
> >from RAM and loads our OS from flash.
> >
> Ehm....interrupts?
>
> --
>   Legolas
>
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