Changes

'''Haxchi''' is a homebrew app that can quickly load custom firmware by replacing a real Virtual Console DS game with itself, so to load the custom firmware for the current kernel session, simply open Haxchi from the Wii U Menu.

| title      = Haxchi

| desc        = Custom firmware available without needing to open [[Homebrew Launcher]]

| source = https://github.com/FIX94/haxchi

'''Haxchi''' is a homebrew app that can quickly load homebrew using a channel on the [[System Menu]]. It replaces a real Virtual Console DS game with itself, so it is required to download one from the eShop, and this game will not be playable while Haxchi is installed.

'''Coldboot Haxchi''' (also known as '''CBHC''') is another version of Haxchi. It injects code into the boot process to automatically load the Haxchi channel. There are several things here that can be done wrong that result in a [[brick]], due to the dependence on a Coldboot Haxchi channel that is visible on the [[System Menu]]. These include:

 

* Moving the Coldboot Haxchi channel out of the NAND

==Uninstalling==

* Uninstalling the Coldboot Haxchi channel without properly uninstalling Coldboot Haxchi first.

Haxchi can be uninstalled simply by deleting the channel. The DS game can be recovered by downloading it again from the Nintendo eShop.

* Deleting the user that bought the DS game Haxchi was installed on top of.

* Downloading the DS game Haxchi was installed on after Haxchi was installed.

* Installing Haxchi again inside CBHC.

==Installation==

==Installation==

'''Haxchi Channel'''

Note that Haxchi is mostly useless when [[Tiramisu]] or [[Aroma]] is installed, so there is usually no reason to get Haxchi.

# Install a Virtual Console DS game if you don't have one already. The cheapest one is "Brain Age" (known as "Brain Training" on PAL consoles).

# Install a Virtual Console DS game if you don't have one already. The cheapest one is "Brain Age" (known as "Brain Training" on PAL consoles).

# Download Haxchi from the [[Homebrew App Store]] and put it on the SD card.

# Download Haxchi from the [[Homebrew App Store]] and put it on the SD card.

# Press A to accept the disclaimer, or HOME to cancel.

# Press A to accept the disclaimer, or HOME to cancel.

# Haxchi should now install.

# Haxchi should now install.

==Usage==

==Usage==

The DS game that Haxchi is installed over will be replaced by a new channel, the Haxchi Channel. Launching this channel loads up the Haxchi CFW, although there are also some tools that can be used, such as holding A to load the Homebrew Launcher after the CFW is loaded.

The DS game that Haxchi is installed over will be replaced by a new channel, the Haxchi Channel. Launching this channel loads up the Haxchi CFW, although certain buttons can be configured to perform certain actions instead of loading the CFW. For example, many people configure A to load the [[Homebrew Launcher]] to skip the need to run an inconsistent Browserhax exploit.

When Coldboot Haxchi is installed, the DS game is instead replaced by a Coldboot Haxchi channel with a red warning sign icon, a reminder not to delete it. It is meant to be put on a screen where it won't be seen, to prevent accidental deletion. For convenience, CBHC also installs a normal Haxchi channel that does not cover up any DS game and does not cause a brick upon deletion, so that remote screen does not need to be located to perform Haxchi-related operations.

Haxchi first gains root access using [[Uhshax]]. It then takes advantage of the contenthax bug, which allows every part of a title except the actual code to be modified without invalidating it. In the case of Virtual Console games, this code is the emulator, not the game’s code, which means the game itself can be modified. Haxchi replaces the game’s code with a sequence of bytes that sets up ROP, and therefore can pass code execution to itself. Haxchi also replaces the title and banner of the game, since these are not checked either, to look like a different title.