Gateway 3DS Installation and Usage

For preliminary reading or if you have any questions see the 3DS Hacking FAQ or if you absolutely have to post your question post in this thread - 3DS - Ask questions here

Installation

The Blue Card is used for installing Gateway and running DS games/homebrew. The Red Card is used for running 3DS games/homebrew.

Things that will be used in the installation:

1. The Blue Card from Gateway.
2. The microSD card used in the Blue Card, a larger microSD should preferably be used for the Red Card since 3DS ROMs use much more space.
3. The SD card that the 3DS uses for user data.

Copying Files and Backing Up Data

Format the microSD card you plan to use in the Blue Card as FAT32 (Right Click -> Format -> File System) Download the latest Gateway firmware off the Gateway website or a mirror (if you wish to update the sysNAND to 4.5 without the use of a retail cart stop and read (foobar).

After uncompressing the Gateway firmware copy everything inside "Blue Card (R4i)" to the root of microSD you plan to insert in the blue card. Backup the entire SD card onto a computer, then copy the file Launcher.dat to the root of the SD card

Using the Gateway Installer

Insert the blue card in the 3DS and run the Deep Labyrinth app (Sword Icon) that appears, this should open up a file explorer for your Blue Card's storage, navigate to the Gateway Installer, execute it and follow the instructions. The installation may sometimes hang, hold the power button to switch off the 3DS and try again If installation succeeds follow the power off prompt. Gateway is now installed.

Entering the Gateway Menu, Backing up your sysNAND and creating an emuNAND

Switch on the 3DS, enter the Settings menu, then the Other Settings menu, the Profile Menu and finally hold the L button while pressing Nintendo DS Profile button. The Gateway logo then the Gateway menu should appear if not, power off the 3DS and try again. Choose the backup NAND option, this will take a while. After the backup is done power off the 3DS and then copy the backup (NAND.bin) to a safe place. You may delete the backed up sysNAND from the SD card. Enter the Gateway menu again as shown above, this time choose the format emuNAND option. This will wipe your entire SD card and create emuNAND that Gateway Mode uses. If you need to move back your user data to the SD card do this now. You are now ready to use emuNAND.

Usage

The following actions will require you to run the Gateway installer again:

1. Using the blue card's app (to run DS games/homebrew or even simply opening up the file explorer)
2. Entering settings while in Gateway mode or Gateway Classic mode.
3. Switching off the 3DS or running out of battery.

=Enabling Online in 3DS Games

Running 3DS Games/Homebrew

Format the microSD to be used in the Red Card as exFAT and copy the .3ds files over, insert the red card into the 3DS. Enter the Gateway menu and choose the Gateway mode option, you should now be in Gateway mode running emuNAND. Press select and this should bring up the 3DS games/homebrew menu, use the D-pad to select your application.