copySave here is the guide I mainly worked from, plus the 360hacks subreddit and ifixit.
This is the third iteration of the Reset Glitch Hack (RGH). Where previous versions used a special “glitch chip” and more soldering to pull off, this one uses a Pico programmed to do the job and leaves a minimal trace on the motherboard. My understanding is that RGH uses the console against itself to force an exploit to occur at boot.
By the time you’re done the only physical modification left should be a pair of wires snaking between points on the underside of the board (middle picture), since the Pico is removed after the NAND flashing is complete, but what’s necessary is really dependent on the console revision, the size of your NAND and whether or not the POST_OUT traces are accessible from outside the CPU—if they aren’t you’ll need an adapter. Before the “postfix adapter” was available I think people dremelled their CPUs to get at the points.
I have a 12V 9.6A Xbox 360 S, so it’s a Corona (here is a tool to help you identify yours), with the POST_OUT traces visible and 4GB storage so I know it’s a v2 (it seems even number versions are 4GB, odd are 16MB). The version numbers which I think were labels conjured by the community don’t matter so much as the details, according to Weekend Modder (very good visuals to help identify the components I’m talking about). Stock firmware might also play a role in outlier cases, and Winchester models (later 360 E’s) are across the board not supported!
I don’t have a hard drive to put in my 360 at the moment so I can’t really speak to what sorts of dashboards you can run or how to get backups onto the thing or how to take a modded console onto Xbox Live without getting your console or account banned.
Also I think the reason this mod comes with a guide that is maybe a little scrappy and incomplete and not completely up to date and reliant on interacting with the community to get tips when you run into a snag is that it’s still very new and might be continuing to develop, but also there are so many different hardware revisions for the 360 which has a larger impact when it’s a hardmod. I had a couple moments when the Pico refused to be recognized by J-Runner, the flashing utility you have to use, and the solution was to re-flash the Pico with that .uf2 file to get things moving again. In the end it all worked out and I got mine to boot into the Linux loader and back into the stock dash again just fine. The worst part by far was getting the case open.
