Messages

1

Zaurus - pdaXrom / Archos

« on: October 24, 2005, 04:58:05 pm »

Sashz,
How is it going with the first beta release ?
Will there be one soon ?

2

Zaurus - pdaXrom / Archos

« on: October 23, 2005, 07:02:58 am »

This is interesting stuff !
I have tried to dissasemble the firmware but never succeeded in mounting the resulting cramfs. Never figured out if the problem was related to xip-linear
patches I needed, or the image being bad.  

What did you do to mount the cramfs ?

And how would the pdaxrom work ? Changeroot from qtopia, killing qpe and starting X ? Or hacking the image so qpe does not start at all ?

I'd be very interested in helping, but must say I have no experience using arm (dis)assembler or kernel coding.   
BTW, are you using the latest (1.14-2) firmware for the kernel ? Or do you use 1.13-2 which, I believe, is more stable ?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100593\"][{POST_SNAPBACK}][/a][/div]

Ultimately I would like to boot direct into pdaxrom, but first there will be a chroot method I expect.

To mount the cramfs on pc I did:
Search in aimage.img for bytes 45 3d cd 28 (this is the cramfs header start)
Then extract all  from that offset onwards to create a  cramfs.img (using dd)
I mounted it with:

mkdir /PMA400/rom
mount -o loop -t cramfs cramfs.img /PMA400/rom

The problem is in modfying the cramfs or the precceding data (kernel) and building a new aimage.img, because there are two meaty signatures at the start of aimage.img that are checked at boot time.

3

Zaurus - pdaXrom / Archos

« on: October 21, 2005, 08:28:59 am »

Shame, it would be good for their sales I think.

Official french office says they cannot give us signature generator because security issues  So archos unlike linux and opensources i guess even if they released pma400 )
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100319\"][{POST_SNAPBACK}][/a][/div]

4

Zaurus - pdaXrom / Archos

« on: October 21, 2005, 03:49:54 am »

Sashz,
Can you recomend good arm dissasembler, I looked on net for one but can't find good free one. Using dumpobj is a pain.

Didn't discover much last night.
Just if you have USB host connected when on blue debug screen it will sit there until you disconnect, and you can access HD wfrom host when on blue screen.
Interestring strings in ROM as you say. Same that say "duddudu" etc though might be button press combos, but no luck trying them.
Do you think there might be a terminal open somewhere ?

5

Zaurus - pdaXrom / Archos

« on: October 20, 2005, 08:45:14 am »

Cool,
I will look at this when I get home from work.
 

6

Zaurus - pdaXrom / Archos

« on: October 20, 2005, 08:07:29 am »

Can you reveal how you extract this rom ?
So that I too can view its contents.

[/quote]
no, that boot rom which check aimage and than running linux kernel from it
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100156\"][{POST_SNAPBACK}][/a][/div]
[/quote]

7

Zaurus - pdaXrom / Archos

« on: October 20, 2005, 05:43:40 am »

[/quote]
I have exctracted boot ROM, will disassembly soon. Want help and try yourself?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100110\"][{POST_SNAPBACK}][/a][/div]
[/quote]

Does aimage.img reflash ? or just contain updated kernel + cramfs image.

Yes, how do you extract the boot rom?

My arm is bit rusty and I only have had the PMA for a week so need to read up more on the ti chip data, but I like to have a go.

8

Zaurus - pdaXrom / Archos

« on: October 19, 2005, 04:14:37 pm »

Has anyone been able to hack the signature yet ?

[div align=\"right\"][a href=\"index.php?act=findpost&pid=100005\"][{POST_SNAPBACK}][/a][/div]
[/quote]

signature  Need hack it
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100009\"][{POST_SNAPBACK}][/a][/div]
[/quote]

9

Zaurus - pdaXrom / Archos

« on: October 19, 2005, 11:08:13 am »

On archos has anyone experience of reinserting a new cramfs into the aimage.img.
I have extracted the cramfs data o.k. and mounted it on my PC.

But I am concerned about to two blocks of 96 bytes in the header of aimage that look like they might be a checksum?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100005\"][{POST_SNAPBACK}][/a][/div]

signature  Need hack it
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100009\"][{POST_SNAPBACK}][/a][/div]

That was my fear

10

Zaurus - pdaXrom / Archos

« on: October 19, 2005, 10:20:50 am »

On archos has anyone experience of reinserting a new cramfs into the aimage.img.
I have extracted the cramfs data o.k. and mounted it on my PC.

But I am concerned about to two blocks of 96 bytes in the header of aimage that look like they might be a checksum?

11

Zaurus - pdaXrom / Archos

« on: October 18, 2005, 08:47:37 am »

Hey that's great news.
Will the Archos specific source be available? I might have a dabble.

Hi,
Sorry newb question.
What is the status of the project with respect to the Archos (PMA400) ?
Thanks,
[div align=\"right\"][a href=\"index.php?act=findpost&pid=99853\"][{POST_SNAPBACK}][/a][/div]

Hello
I will try release first beta in weekend or next week :-)
[div align=\"right\"][a href=\"index.php?act=findpost&pid=99856\"][{POST_SNAPBACK}][/a][/div]

12

Zaurus - pdaXrom / Archos

« on: October 18, 2005, 08:03:12 am »

Hi,
Sorry newb question.
What is the status of the project with respect to the Archos (PMA400) ?
Thanks,