Okay so I would like to update my Jtag and to the 12625 dash because my retail xbox broke.
I am going to remove the wiring and what not and flash my original NAND back.
Than I was gonna update to the latest dashboard using a USB.
I know this will blow my e-fuses but in the case I would like to use it later as a Jtag, can I just manually flash back my freeBOOT image and it will still be a Jtag?
If i'm not mistaken, the blown e-fuses just take away the ability to get your CPU key and since I already have that i'm safe to update. Please correct me if I am wrong. I appreciate any help you can give.
I think this just answered my question. I probably should of looked harder before posting. Any other info would still be helpful though
it is impossible to have a console that is a JTAG and retail simply by switching nands there are system protections in place to prevent that (fuses)
fuses are burned when updating the console, stopping the vulnerable kernel being loaded once they are burned. think of it as blacklisting a certain kernal version and below.
you would have to physically update the console to get the latest dash, it would be impossible to build one using your pre 7371 dump AFAIK so goodbye JTAG.
also i'm sure theres a fuse check as part of the dash launch, and the console would either fail to boot (with LDV mismatch or similar) or even worse blow the fuses rendering your JTAG unexploitable.
Once the fuses are blown it doesnt matter about having the cpu key, the console simply will not boot the vulnerable kernel again and the console can no longer be JTAGGED.
believe me if this setup was possible i'm sure the actual homebrew/hacking experts would have released the info by now.
just do like the rest ofus, have a JTAG console for homebrew, and a retail console for live.