Looks like I managed to use an Arduino to get some info from the JTAG of my scope!
I'm not sure if I can do anything else but I used a library available
here I managed to pick up some bits of info, using "minicom" or the serial monitor of Arduino:
At boot time, I try to interrogate the JTAG interface to find all the connected devices (chips). It lists their built-in identification codes which take the form of 32 bits in four groups,and i get this:
03c93279 [0000 0011110010010011 00100111100 1]
The groups are, from most to least significant bit: 4-bit product version (0), 16-bit product code (3c93), 11-bit manufacturer code (279), and one bit that is always 1 for thaumaturgic reasons.
After the boot, if I interrogate the JTAG interface again, I get different results:
079264f3 [0000 0111100100100110 01001111001 1]
Does this means that there are at least 2 memories being used by the scope?
Edited;
I need to make a correction...
No matter what, the first time I interrogate the JTAG interface, I get the 03c93279 code, and the second time I interrogate it, I get 079264f3. Then if I try again, I always get the 079264f3 code.