Xbox 360:R-JTOP

The steps on this page are considered risky for your console, as there is a chance you can brick it. Please have someone else mod your console if you are not experienced in soldering!

The R-JTOP hack is an open source modification that allows you to run unsigned code, mods, game backups, and homebrew on phat consoles. It works by glitching the CB fuse check when loading the old JTAGable CB, which allows JTAG (SMC Hack) to be performed like normal. It works the same way as the R-JTAG+ hack and achieves the same result through a different method. This should only be used if your console doesn’t work well with RGH 1.2. It is useful, as it can be done more cheaply than an R-JTAG, but it is lesser used and therefore you will not receive much support if you run into issues. It’s recommended to take a look at the recommended exploit chart and see what hack is recommended for your console.

Note: R-JTOP does not support Slim/E motherboards.

Requirements

Below are the requirements to R-JTOP your Xbox 360. It’s recommended to read ahead and choose the NAND dumping method and R-JTOP specific wiring that’s right for you, as you will need a NAND programmer and potentially more equipment depending on which methods you choose.

To check that your console is exploitable, it must meet the following conditions. You must have:

1. A fat console (Xenon, Zephyr, Falcon/Opus, or Jasper model). You can look at the back of your console and check this chart to find out what model you have.
   • Xenons and Zephyrs do not have any reports of them working although the original announcement post said "some work". It is highly recommended to use EXT_CLK on these consoles.
   • If you have a Jasper, determine whether if there is Memory Unit built in. If it has 214MB of storage, it’s a 256MB NAND. If it has 451MB of storage, it is a 512MB NAND.
2. Your console on dashboard 15572 or higher. You can check this by navigating to Settings > Console Settings > Hover over System Info. Your dashboard version will be shown in the top right in the form 2.0.xxxxx.0, where xxxxx is your dashboard version.
   • If it is on a lower dashboard, you can update it to the latest.
3. Soldering experience. The Xbox 360 is not a good place to learn to solder. Regardless of which dumping method you choose, you will need a soldering iron, solder, and flux.

You will also need:

• A NAND reader that can program glitch chips (JR Programmer, NAND-X, or two Matrix USB NAND Flasher)
• A xc2c64a based glitch chip (CoolRunner 3, CoolRunner rev C/D, or Matrix Glitcher) or the ability to compile the source for another chip
• J-Runner with Extras (Includes R-JTOP timing files for Falcon and Jasper. You will need to compile the source for Xenon and Zephyr timing files.)
• Equipment listed in the relevant R-JTOP specific wiring below

Reading your NAND

There are six different methods to making a dump of your NAND chip: xFlasher 360, Nand-X, JR Programmer, Matrix USB NAND Flasher, Picoflasher, or a LPT cable. While an LPT cable can be used, they cannot be used to flash glitch chips, so you will need one of the other devices anyway. It's also not recommended, as it's extremely slow and requires more work than other options. Consider the pros and cons below and choose the method that’s right for you. Once you have decided on a method, select the guide below and follow it to get a NAND dump, create XeLL tailored for your console, and write XeLL to your motherboard. Once you’ve completed the page below, continue to the next section.

Tutorial for dumping the Xbox 360's NAND and writing XeLL to the console

Device	Pros	Cons
xFlasher 360	Reads NAND fast in 40 seconds to 4 minutes Can also program glitch chips Actively supported USB-C Uses signed drivers	Most expensive flasher Can't be used for flashing Sonus Sounds
PicoFlasher	Reads NAND fast in 1-8 minutes One of the two options for Sonus sound programming Super cheap Easy to find Uses signed drivers	Can't easily be used to flash glitch chips
Nand-X	Reads NAND in 2-8 minutes Can also program RGH glitch chips	More expensive than most NAND flashers Not much cheaper than the xFlasher Can't be used for flashing Sonus Sounds Requires unsigned drivers
JR Programmer	Reads NAND in 3-10 minutes Can also program glitch chips One of the two options for Sonus sound programming Cheap Easy to find	More expensive than PicoFlasher or Matrix Can't be used for flashing Sonus Sounds Requires unsigned drivers
Matrix USB NAND Flasher	Reads NAND in 7-26 minutes Super cheap	Can’t be used for programming glitch chips unless you modify it Can't be used for flashing Sonus Sounds Requires unsigned drivers
LPT Cable	Cheap Doesn't require unsigned drivers	Requires PC with a native parallel port and more equipment More difficult Can’t be used for programming glitch chips Can't be used for flashing Sonus Sounds Takes 30-150 minutes to read NANDs

Programming the Glitch Chip

1. Plug the cable from your programmer into the chip programmer.
   • If you are using an xFlasher, ensure the switch is set to SPI
   • CoolRunner: Slide switch on the CoolRunner to "PRG".
2. Open J-Runner with Extras. Click "Program Timing File" in the upper left and select your console’s tab and the relevant radio button for R-JTOP.
3. Click "Program". When complete, unplug the cable from the glitch chip.
   • Coolrunner: Set the switch back to "NOR".

If you are using an X360ACE, you can follow flashing instructions here

R-JTOP Specific Wiring

The wiring for R-JTOP is the same as the wiring for the JTAG hack. Choose the guide that pertains to you:

Xenon Method

• This is the only method for Xenon motherboards. Do not use it if you have a non-Xenon motherboard.

Boxxdr Method

• This method is for Zephyr, Opus, Falcon, or Jasper motherboards. This method may disable 5.1 audio output.

Boxxdr Method + Open Tray

• Use this method if the Boxxdr method doesn’t boot, you receive E79 errors, or you have issues with HDMI. This method may cause your DVD drive to eject on bootup. Also, your console will reboot instead of shutting down if you turn off the console while a controller is charging via USB.

Glitch Chip Wiring

X360ACE Diode

The wiring for R-JTOP is the same as the wiring for RGH 1.2.

Glitch Chip Diagrams

Coolrunner Rev C or D

• A - PLL
• B - STBY_CLK (only if not using oscillator)
• C - POST
• D - RST

Coolrunner 3 Lite

• A - PLL
• B - STBY_CLK (only if not using oscillator)
• C - POST
• D - RST

Matrix Glitcher

• A - RST
• B - POST
• C - STBY_CLK (only if not using oscillator)
• F - PLL

Squirt

• Squirt BGA 1.2: Disable the onboard 670pf and/or 480pf caps by removing R7 and R8
• Squirt Reloaded 2.X: remove R2 and connect STBY_CLK
• Pinout follows written labels
• Don't use POST or RST tuners

X360ACE V1/V2/V3

• C - POST
• D - RST
• E - STBY_CLK (only if not using oscillator version)
• F - PLL (22K ohm resistor required)
• Remember to remove the diode and connect 1.8V
• Note that the X360 ACE requires you to compile timing files for it

Decrypting the NAND

Once you have successfully obtained your CPU key, we can build an XeBuild image, which is a modified NAND built specifically for your console.

• If you want to use J-Runner with the console connected to LAN to get the CPU key, enter the IP address XeLL gives you into the lower right of the app. You can then click Get CPU Key and XeLL will automatically decrypt the retail NAND dump you backed up earlier.
• If you want to use XeLL's web page to get the CPU key, enter the Xbox's IP address in your preferred web browser. You will see information about the console, and the CPU key can be easily copy and pasted from this web page.
• If you didn't have access to an ethernet cable to plug the Xbox into a PC or LAN, you can manually type the CPU key into J-Runner in order to decrypt your original NAND dump.

Writing a New NAND Image (NAND Flasher)

1. Power down the console, and connect your programmer to the motherboard and computer.  
   • If you are using an xFlasher, ensure the switch is set to SPI.
2. Open J-Runner and select ... next to the Load Source field and either select your nanddump1.bin or nanddump2.bin if not already selected. In the upper right corner of the window, select the dashboard version you chose for the patched dump that you wrote to the motherboard and make sure that the Jtag radio button is selected.
   • Make sure the R-JTAG checkbox is enabled.
   • If you have a non-Xenon console, the Aud_clamp checkbox should be enabled.
3. Click Create XeBuild Image. This will take a few moments.
4. Click Write NAND.
5. Disconnect your programmer when the process completes, and check if the console boots to the Microsoft dashboard. If it successfully boots to the dashboard, it is an indication that you've successfully hacked your console.
   • You may want to leave your Xbox 360 disassembled so that you can:
     • ...disable the eFuse-blowing circuit so you can't accidentally install official updates on your console.
     • ...check what temperatures it's running at so you can judge if you need to replace the thermal paste to avoid overly loud fans and/or overheating issues.
6. Remove your NAND programmer wires and clean the points. Clean all flux off the board, allow it to dry, and test it once more before re-assembling. You're now free to install XEXMenu (instructions in section below).

Writing a New NAND Image (XeLL with USB Storage)

1. Open J-Runner and select ... next to the Load Source field and either select your nanddump1.bin or nanddump2.bin if not already selected. In the upper right corner of the window, select the dashboard version you chose for the patched dump that you wrote to the motherboard and make sure that the Jtag radio button is selected.
   • Make sure the R-JTAG checkbox is enabled.
   • If you have a non-Xenon console, the Aud_clamp checkbox should be enabled.
2. Click Create XeBuild Image. This will take a few moments.
3. Copy updflash.bin to a FAT32 formatted USB storage device and plug it into your powered-off console. Turn on your console and it will boot into XeLL and begin flashing your NAND. Once it has finished, it will power off your console. Turn it back on, and it should boot to the Microsoft dashboard, which is an indication that you've successfully hacked your console.
   • You may want to leave your Xbox 360 disassembled so that you can:
     • ...disable the eFuse-blowing circuit so you can't accidentally install official updates on your console.
     • ...check what temperatures it's running at so you can judge if you need to replace the thermal paste to avoid overly loud fans and/or overheating issues.
4. Remove your NAND programmer wires (if they are still attached) and clean the points. Clean all flux off the board, allow it to dry, and test it once more before re-assembling. You're now free to install XEXMenu (instructions in section below).

Installing XeXMenu

1. Plug a flash drive into your Xbox 360 and navigate to Console Settings > Storage. Select the flash drive and allow it to format the flash drive as a system drive.
2. Extract the CODE9999 folder from the XeXMenu 1.2 rar to your Desktop.
3. Plug the flash drive into your PC. Open Xplorer360 and select Drive > Open > Harddrive or Memcard. On the left-hand side, select Partition 3, then right-click the Content folder, select New Folder, and name it 0000000000000000 (16 zeroes). Open the new folder, then drag the CODE9999 folder into it.
4. Select Drive > Close, then close Xplorer360. Safely eject your flash drive and plug it into your Xbox 360. Navigate to the Demos section of your dashboard, and it should list XeXMenu there. Select it to launch it.
   • You can install XeXMenu to your hard drive by going to Console Settings > Storage, and copying it from your flash drive to the hard drive.

From here, you can install any homebrew or mods that you want. See this page for a list of recommended modifications and applications to install.