To update your GC Dual from firmware 3.0d to 3.1, you'll need to follow this update process.
Here's a step-by-step guide:
Here's a step-by-step guide:
? What You’ll Need:
- A GameCube console with the GC Dual mod installed
- An SD card (FAT32 formatted)
- A way to launch homebrew on your GameCube (e.g. Swiss via SD2SP2, SD Gecko, or another loader)
- A GameCube controller
? Step 1: Download the Firmware Update
Visit the GC Dual firmware directory on Dan’s Projects:
https://web.archive.org/web/20240722191354/http://www.dansprojects.com/firmware/GCDual/- Download the file named:
GCDual_CDK3404_3.1.zip
(or matching your GC Dual chip version) - Inside the ZIP archive, locate the file:
GCVideo-gcd-3.1-update.dol
(or similar name)
? Step 2: Prepare the SD Card
- Format your SD card to FAT32 if it isn’t already.
- Place the update
.dol
file onto the root of the SD card or in a folder like/apps/gcdualupdate
.
? Step 3: Boot Swiss & Launch the Update
- Boot your GameCube using Swiss (via SD2SP2 or SD Gecko).
- Navigate to the update
.dol
file on the SD card. - Run the updater using Swiss.
- Follow the on-screen instructions. It should detect the GC Dual and prompt you to update.
⚠️ Important Notes:
- Do not power off your console during the update.
- The screen may go black briefly—this is normal.
- Once completed, the updater will typically say “Update Complete” and may ask you to power cycle the system.
✅ Step 4: Confirm the Update
- Reboot your GameCube.
- Hold L + R + X + Y on boot to enter the GC Dual settings menu.
- Verify that the version in the top corner reads 3.1.