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Sniffing the Rigol's internal I2C bus

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whotopia:
Can someone advise if it is possible to restore the serial number of a DS2072A ?
I tried to do some of the hacks in the past and this lead me to a unit with serial number DS2A0000000001.  The MAC address on the LAN interface is also wrong.  It's 46:46:46:46:46:46.  I assume the MAC must be uniquely generated from the serial number somehow.
The device is currently at firmware DS2000(DSP)Update_00.03.04.01.00
What can I do?

smgvbest:
RE: DSA815 Hack
Still working on the traditional way of do this but I had a thought and wanted to see if anyone thought this was remotely possible.
We know prior to boot loader 1.04 that the rigup could create codes that worked and those where stored in memory on the DSA815.
After updating to boot loader you could not enter new codes but those with existing codes still work.

So maybe a little backwards thinking but.  What if we generated licenses for boot 1.03 and wrote them directly to memory then rebooted (may not be needed) the unit.  this would need of course to know where the licenses are stored in memory.  we know a SDRAM dump isn't what's needed and they don't appear to be stored in the FRAM chip either.   So the question is where are the licenses stored?

I know it's far fetched but is there any merit in it the thought?
Just thought I would through this out there. 

smgvbest:
I am one of the people looking at redoing the keygen but I am far out of my comfort zone in doing so. I had the thought that I posted and was looking for feedback on that question, not clarification on where the issue is boot loader or firmware.   I only state that as it is often the pointed question of which boot loader do you have not which FW version do you have when find out if the user can use the keygen.

My question was around an alternative method of doing this.  If it was possible then it gives us a way to get keys installed and isn't that the point.  The method doesn't mater as long as it works.   

So my question is still does anyone think that might be a viable way around the issue or is it a waste of time to pursue?


--- Quote from: ted572 on November 03, 2015, 08:52:22 pm ---It is NOT the BootLoader that is preventing the Riglol Keygen results from working, it is the Firmware (FW). You need to go back to a previous FW such as 00.01.06, but the BootLoader is preventing you from going back to the earlier FW.

It is possible that someone could come up with a Riglol Keygen that would work with the newer version of FW, but it seems that no one has been able to do it.

So those with the newer DSA815 FW should at least for now solder pins 7 and 8 together on U1105 while the Trial Options are still current.   If you want to play Russian Roulette with your DSA815, then wrap a wire between these two pins as some others have suggested.  I say this because you will most likely end up sooner or later with some oxidation between the connections and lose the Trial Options without having any warning.

--- End quote ---

geggi1:
Might it be as simple as some checsum stuff to be able to use a older FW?
Add some lines with empty code to get the correc checsum?
Have anybody compared the files size and other features before upgrading FW?

ted572:
  Re: Sniffing the Rigol's internal I2C bus
« Reply #4063 on: Today at 06:54:27 PM »

I think that the easiest thing to do would be to replace BootLoader .04 with .03 (not that this will necessarily be that easy to do) although it seems like it could be done, and I would think easier than figuring out how to crack the new FW.  Then you would be able to use Riglol Keygen 1.03c or 1.03d to generate the Option codes.

I previously posted in the EEVblog 'DSA815 Spectrum Analyzer' thread on how to downgrade the FW when you have BootLoader .02 or .03.  And BTW I have .14 FW installed, and because I have BootLoader .03 I can still downgrade back to .06 FW and use the Keygen successfully.  And then of course reinstall .14 FW.

Suggestion:  You may want to check who the DSA815 FW gurus are and ask them via PMs for advice on how to/what to look for/etc.  Although, now and then some new guy shows up with actual answers to things like this, but not very often.  That is why I would go to the guys here that have done these things before with the DSA815.

Good Luck and Cheers. . . 

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