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SonicWALL SRA 4200. Hardware hacking!

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Monkeh:

--- Quote from: pappkopp on December 13, 2013, 01:21:53 pm ---
--- Quote from: Monkeh on December 12, 2013, 10:26:49 pm ---
--- Quote from: pappkopp on December 12, 2013, 10:26:02 pm ---Regarding the VIA chip, isn't that  the Disk Controller?

--- End quote ---

No.. did you read the datasheet you posted?

--- End quote ---
I guess that the "Floppy disk" is under the genre of Compact flash disk?

--- End quote ---

Guessing won't get you very far.

TheBay:
Compact flash is IDE not a floppy controller.

TheBay:

--- Quote from: Monkeh on December 13, 2013, 04:37:03 pm ---
--- Quote from: pappkopp on December 13, 2013, 01:21:53 pm ---
--- Quote from: Monkeh on December 12, 2013, 10:26:49 pm ---
--- Quote from: pappkopp on December 12, 2013, 10:26:02 pm ---Regarding the VIA chip, isn't that  the Disk Controller?

--- End quote ---

No.. did you read the datasheet you posted?

--- End quote ---
I guess that the "Floppy disk" is under the genre of Compact flash disk?

--- End quote ---

Guessing won't get you very far.

--- End quote ---

This forum needs a like button :)

Tinkerer:

--- Quote from: pappkopp on December 12, 2013, 12:20:55 pm ---
--- Quote from: nowlan on December 12, 2013, 12:00:55 pm ---Just get a compact flash card and reader and put linux on it.
I doubt you need to worry about signed images etc.


--- End quote ---

Yeah, i have an compact disk reader. But when i connect it to my reader it won't mount under any circumstances, when i see the debug message on my Linux system it whines about bad sectors and I/O errors. Therefore no mounting for that card (would be fun to see the contents of it tho)

I will hook up an flash card as soon as possible,. I will keep you guys updated :):)

Kind Regards

--- End quote ---
If that flash card has bad sectors, you very likely have corruption.

tja:
I've just acquired one of these devices, and have spent a little time trying to reverse engineer it.

I took a slightly different approach to video output to the OP, and just soldered a VGA socket into the unpopulated spot on the MB - works fine.

Major problem is I have not been able to get into the BIOS at all, have rebooted many times and pressed all manner of keys - nada.

This is what it says on boot up:

Validating firmware CRC...
CKIMAGES v2.1
Validating files...
CRC is valid.
Booting into firmware…
LINLD v0.97
Kernel command line:
root=/dev/ram0 rw console=ttyS1,115200 ramdisk_size=163840 ide=nodma
Decompressing Linux... Parsing ELF... done .
Booting the kernel .

It appears to boot into FreeDOS, which then loads Linux. It is possible to interrupt the boot process and explore from a FreeDOS prompt, but I haven't found out much. Very limited range of FreeDOS commands available.

I have extracted the BIOS flash rom (a 39sf040) and dumped it using an Arduino lash-up, but I don’t know what to do next - what format should I save the data as, and what utilities can I use to manipulate the BIOS, if any?

All help gratefully received.

Hi-res photos of the board, BIOS dump and boot photos here:
https://drive.google.com/open?id=1WMaan81lUdivlR2-s8uoYmRYDbtQXcHQ

Cheers

Tim

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