DS-Xtreme OpenSource Firmware Project
How Shuny's Downgrader Works
At offset 0x000B79F4 in the DSX updater application file you will find the URL that points to the DSX server. This is where updater.txt and updater.bin can be loaded by the updater application.
Shuny patched this URL to point to another server where the older V110 update.txt and update.bin could be found.
Hats of to Shuny for a very clever and inventive piece of work.
Work In Progress Log
5th January 2008:
Initial viewing of the PC Updater tool yields the following information.
1) The updater was coded with Borland Delphi development enviroment in C/C++. 2) The updater contains ZLIB compression librarys (probabily for the firmware). 3) The updater contains Altera Jam FPGA communication librarys (maybe for the JTAG connector on the circuit board). 4) The updater contains Indy Sockets library. 5) The Updater contains Cypress USB communication librarys.
On running the updater, it uses windows sockets api to download update.txt and update.bin from the DSX server. The Indy Sockets api is probabily the wrapper to call the windows sockets api, for platform independancy. Delphi also has wrappers for the application windows. The applications resources can easily be pulled out with XN Resource editor. I've also noticed on some of the disassembly that the updater looks like it can take command line arguments?
7th January 2008:
main page redesigned for clarity.
Firmware and other files moved to a seperate wiki page, and descriptions added for the files.
Link to the initial hardware explorations, files and api's added.
Changed the Mozilla references to the Indy.Sockets librarys.
Some terminology corrected
I'm currently trying out a few disassemblers on the PC updater application .exe to see which gives me the best results. The hardware investigations need putting on the wiki on a seperate page. Get hold of the NDS launcher that was aquired with NO$GB and the wifi homebrew. This could be usefull to find out where in- - the update.bin the NDS launcher resides. This log need moving to the discussion page.
All in all not bad going for a weak lameass like me :)