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Sniffing the Rigol's internal I2C bus

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AndersAnd:

--- Quote from: cybernet on December 09, 2013, 10:26:37 pm ---fully official CAN and 300M Bandwidth on DS2000 (non A) ;-))))) *ole*
will post right option codes in a minute ...
--- End quote ---
Great work as always, so Christmas came early this year  :-+
Is the 50 ohm option enabled too for those with a non A model with HW ver. 2 with 50 ohm input already populated?

cybernet:
for FW 00.02.01.00.03 - on a DS2000 (NON A version only !)


--- Code: ---0x1C080    - DSEA - PROTOCOL ANALYSIS - CAN
0x1C040    - DSCA - BANDWIDTH - 300M Bandwidth (takes a reboot to show up in System Info)
0x1C020    - DSBA - (installs option, but i dont see it ?)
0x1C010    - DSAS - BANDWIDTH - 200M Bandwidth
<known codes still work - see elsewhere>

enable 0x1C0E7 -> all but 100/200M bandwidth-> DSHH
--- End code ---

i wonder if 0x1C020 is the 50Ohm option, which my hw probably doesnt support.

UPDATE: despite being DS2302 model, bw limit option is only NONE,20M,100M - somebody better confirm that NONE = 300M ;-)

cybernet:

--- Quote from: zombie28 on December 09, 2013, 04:20:21 pm ---And now I know why - Rigol didn't bother to change the public key either. I found the old public key in the new firmware (encoded by the same bit shuffling algorithm I described earlier). The sequence of encoded bytes is as follows: 97 58 B9 DE 24 C5 11 10, which obviously translates to "8445B2BE29E5C7". I believe Rigol didn't change the keys to maintain backward compatibility with previously sold license codes. Alternatively they may use two separate keys for 'non-A' and 'A' license codes.

--- End quote ---

they use the same curve parameter, but another point on the curve for the DS2000A - i will see if i can find the new point - if not, patch it so it reverts to the known parameters.
a modified gel will also tell if they use signed code now or not ... thanks for finding the obsfuscation - with that info it wasnt too hard.

nack:
Wow cybernet, you keep blowing my mind with your knowledge and firmware modification skills  :clap:

alank2:
So are you loading these codes with 00.01.01.00.02 and then upgrading to 00.02.01.00.03 to utilize them?

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