Coldboot Haxchi


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Required Reading

CBHC (Coldboot Haxchi) changes your default system title from the system menu to your DS virtual console game. This causes your device to launch CFW automatically at boot.

This exploit is slightly more dangerous than standard Haxchi because your DS Virtual Console game exploit is the only way to boot the system. If this game is ever deleted or the exploit is removed, installing CBHC will BRICK your device!

You MUST have a functional Haxchi setup for this to work. If you do not, you will BRICK!

Your Haxchi DS virtual console game MUST be on the internal memory of your Wii U. If it is on a USB drive, you will BRICK!

Your Haxchi DS virtual console game MUST be a LEGITIMATE (non-pirated) copy or you will BRICK!

Instructions

Section I - NAND Backup

This is an optional section which will create a backup of your device’s internal NAND memory on your SD card, which will allow you to restore your device in the case of a brick.

If you have a black Wii U (32GB) model, your SD card must be at least 64GB in size. If you have a white (8GB) Wii U model, your SD card must be at least 16GB in size.

It is not possible to brick your device by installing CBHC as long as all instructions and warnings are followed. This, combined with the strict SD card requirements and extremely slow NAND dumping speed, means that creating a NAND backup is currently an optional step

If you accept the risk of installing CBHC without a NAND backup, skip this section.

  1. Enter the Homebrew Launcher by holding (A) while launching your Haxchi DS virtual console game
  2. Launch nanddumper
  3. Use the D-Pad to set the following options:
    • Dump SLC (528MB): yes
    • Dump SLCCMPT (528MB): yes
    • Dump MLC (8GB/32GB): yes
    • Dump OTP (1KB): yes
    • Dump SEEPROM (1KB): yes
  4. Press (A) to dump your NAND
    • Be prepared to wait; this can take a while (up to several hours depending on how much used space you have on the internal memory)
  5. When it has completed, your Wii U will reboot automatically
  6. Power off your device
  7. Insert your SD card into your computer
  8. Copy slc.bin, slccmpt.bin, otp.bin, seeprom.bin, and each mlc.bin.part file from the root of your SD card to a safe location on your computer
    • Make backups in multiple locations (such as online file storage)
    • These backups will save you from a brick and/or help you recover files from the NAND image if anything goes wrong in the future
  9. Reinsert your SD card into your device
  10. Power on your device

Section II - Installing CBHC

  1. Remove all USB devices from your Wii U
  2. Enter the Homebrew Launcher by holding (A) while launching your Haxchi DS virtual console game
  3. Launch the CBHC installer
  4. Select the DS virtual console game you are installing CBHC onto, then press (A) to select it
    • This game MUST already have a functional Haxchi installed
  5. Read the warning that appears, then press (A) to install
  6. Once this is complete, you should be back at the system menu
  7. You may reconnect any USB devices that were disconnected earlier.
  8. Reboot your Wii U
  9. If the exploit was successful, you will see a menu appear with various boot options
  10. Hover over “Autoboot: Disabled”, then press (A) on it until it says “Autoboot: System Menu”
  11. Press (A) on “Boot System Menu”
  12. Reboot your Wii U to ensure the exploit works automatically as intended
  13. Move the CBHC DS virtual console game to the last page of the system menu
    • Read the warnings at the bottom of this page carefully to avoid bricking your device!

Your device should now automatically launch into Coldboot Haxchi custom firmware on boot.

You can press (Home) while CBHC is booting to access the CBHC boot options menu. This is what each of the boot options do:

  • Boot System Menu -> Boots into custom firmware
  • Boot Homebrew Launcher -> Boots into the Homebrew Launcher
  • Boot Mocha CFW -> Boots into Mocha CFW (no reason to use this with CBHC)
  • Boot fw.img on SD Card -> Boots into any older fw.img based CFW from the SD card
  • Boot vWii System Menu -> Boots into vWii
  • Boot vWii Homebrew Channel -> Boots into vWii Homebrew Channel

You may reconnect any USB devices after the installation has completed.

Never uninstall the CBHC DS virtual console game or you will BRICK.

Never reinstall the CBHC DS virtual console game or you will BRICK.

Never move the CBHC DS virtual console game to a USB drive or you will BRICK.

Never delete the user account NNID that has purchased the CBHC DS virtual console game or you will BRICK!

Never format your device while CBHC is installed or you will BRICK!

Continue to Homebrew Launcher (Channel).