Forget JTAG. Today's RGH is about two paths: the classic RGH 1.2/2.0 (with a glitch chip) or the near-chipless RGH 3.0.
– Get a JR Programmer v2 or a Raspberry Pi Pico . The Pico is $4 and works with PicoFlasher software – best value. xbox 360 rgh tools
– Don't cheap out. A temperature-controlled iron and flux are non-negotiable for the tiny resistors on RGH 3.0. Forget JTAG
– Coolrunner Rev C for Phats, X360ACE V5 for Slims. RGH 3.0 users skip this. xbox 360 rgh tools
Install DashLaunch and Aurora via XexMenu – then you're done.