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Updated for the release of tiramisu
{{Redundant|Tiramisu}}
{{Infobox homebrew
| title = Coldboot Haxchi
| desc = Loads custom firmware automatically on boot.
| author = [https://github.com/FIX94 FIX94]
| type = utilitysystem tool
| version = 2.5u2_v1.6
| download = https://www.wiiubru.com/appstore/zips/cbhc.zip
==Bricking risks==
To prevent your Wii U from being bricked, do not do any of the following:
* Do NOT move the CBHC channel to an SD card a USB device or anywhere outside the NAND.
* Do NOT uninstall the Coldboot Haxchi channel without properly uninstalling Coldboot Haxchi first.
* Do NOT format the systemmemory.
* Do NOT delete the user that bought the DS game Haxchi was installed on top of.
* Do NOT download the DS game Haxchi was installed on after Haxchi CBHC was installed.
* Do NOT install Haxchi again inside CBHC.
 
==Uninstalling==
Before uninstalling CBHC (for example, to install [[Tiramisu]]), be sure to follow this procedure.
# Open the [[Homebrew Launcher]].
# Open the CBHC installer.
# Select the DS game you used to install Haxchi and CBHC.
# Press B to uninstall CBHC.
# Verify that CBHC is no longer installed by rebooting (holding HOME if autobooting was enabled) before continuing
# Delete the CBHC channel through Data Management. The DS game can be recovered from the eShop.
==Installation==
This is generally not needed, as Tiramisu has replaced CBHC.
# READ THE WARNINGS ABOVE!
# Install regular [[Haxchi]] if you have not done so already.
# Press A to install CBHC.
# Reboot your console to allow CBHC to start.
# There should be 2 a new channels channel installed: the [[Haxchi|Haxchi Channel]] and the CBHC channel. Move the CBHC channel to an empty screen so it doesn't get deleted by accident. The normal [[Haxchi|Haxchi Channel]] does not have these risks, and can be reinstalled if it is deleted by accident. ==Uninstalling==Before uninstalling the CBHC channel, be sure to follow this procedure.# Open the [[Homebrew Launcher]].# Open the CBHC installer.# Select the DS game you used to install Haxchi and CBHC.# Press B to uninstall CBHC.# CBHC should be gone when you reboot your console. It is now safe to delete the game, and reinstall it to start playing it again.
==Usage==
When booting the Wii U, a menu will come up, asking what you want to boot, with an option to automatically boot to one of the options. When autoboot is enabled, this menu can still be accessed by holding the HOME button during the booting process.
The DS game you chose during installation gets replaced by a CBHC channel (titled "DONT TOUCH ME!Haxchi"). DO NOT tamper with this channel! It is advised that you move it to an empty screen so it doesn't get deleted by accident. In addition, an extra channel is installed, namely a normal [[Haxchi|Haxchi Channel]]. This channel does not overwrite a DS game, and stays on the [[System Menu]] for as long as CBHC is installed, because CBHC removes the security check that removes unauthorized channels. For more information on the [[Haxchi|Haxchi Channel]], see [[Haxchi]].
==How it works==
CBHC replaces the [[:/vol/system/config/system configuration .xml]] to tell the boot process to boot to [[Cafe OS]] that the CBHC channel instead of is the System Menu. This allows it to run and load anything it wants, similar to [https://wiibrew.org/wiki/Priiloader Priiloader] on the Wii. This CBHC channel has the loader seen when booting. Because of this, removing the CBHC channel from the NAND makes it impossible for the Wii U to boot, and therefore bricks it. Additionally, because [[Haxchi]] loads the System Menu using the title ID that CBHC overwrites, installing Haxchi again without uninstalling CBHC causes Haxchi to constantly boot itself, bricking the Wii unless Haxchi was configured to have an option to boot to the [[Homebrew Launcher]].
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