One of the more interesting items that a Nintendo or Gamecube collector might come across is the Gamecube Service Disc 1.0/03. This special disc was designed for the authorized Nintendo repair centers to test, diagnose and evaluate any troublesome Gamecube hardware submitted for repair. This in-depth look not only answers the question of what exactly this disc does, but also the secrets it holds inside.

Origins / The Name
The disc was released very near the beginning of 2003. This can be determined by the final build date on the disc being sometime in late November, 2002. Many people have pondered what the 1.0/03 represented in the disc’s title, the version was 1.0 and the year published was 2003 (03). This was the only service disc released and no further revisions were made, however…

The Gamecube had been released in late 2001. To fill the gap between system launch and the release of the service disc, service centers were shipped a copy of the October 2001 Kiosk demo collection to test out systems for simple problems. This can be confirmed with a memo(pdf) which was sent out to all service centers. Later, it is reported that centers used Kiosk disc version 16 for its GBA link cable functionality, but this can’t be confirmed. Service Disc 1.0/03 was in use all the way until the service center program was officially dissolved at some point in 2004. More on the fate of the service disc at the end of the article.

Purpose / Functionality
The disc itself contains around 100 different tests, ranging from sound diagnostics to full 3D rendering to controller interfaces. Every single aspect of the Gamecube hardware could be tested; here are some highlights from the user-selectable tests:

Demo:
Demo is a full 3D render test designed to visually identify problems with the graphics hardware. You can set it to display 1, 3, 5, 8 or 12 cars, of three different types. You can remove the lighting, remove the textures, and even cell-shade the cars. Music also plays in the background during this test.

Clockspeed (Gekko Stats):
This test provides all sorts of interesting information. Not only does it display the system’s unique ECID, it also provides technicians with bus frequencies, processor frequencies, and various RAM frequencies among other things.

Gekko Info (Gekko State):
Provides in-depth information into the Gekko processor itself and the current active state. I’m not going to lie and pretend I know what this screen shows, but my best guess is that it is depicting which processor features/capabilities are enabled or disabled.

Audio tests:
Separate tests to play audio from left, right, and center channels. There is also one that tests streaming audio off the disc. All of the audio on this disc is saved as .adp files.

Video tests:
Nothing too exiting, these tests will either run a color bar test pattern or allow you to cycle through red, green, and blue. Presumably to test faulty hardware or connectors/cables.

Controller Test:
This test will prompt you to press certain buttons or spin specific analog sticks in a specific order. If you don’t do as instructed, the test will fail. Used to diagnose faulty controllers or broken controller ports.

GBA Link Test:
This test will detect a GBA attached to the Camecube and send over a simple test program. The program will let you control a number and move it around the screen. This test can use up to 4 GBAs all controlling a number 1-4 on the screen. Their movement is relayed both on the Gamecube screen and on every other GBA.

The neat thing about this test is it can detect anything you put in the controller port correctly (the only exception being the Resident Evil chainsaw which appears as a standard controller, as does the Hori digital controller). Here is the full list of detectable control devices pulled from a file on the service disc:

• No response
• N64 controller
• N64 microphone
• N64 keyboard
• N64 mouse
• GameBoy Advance
• Standard controller
• Wireless receiver
• WaveBird controller
• Keyboard
• Steering

You’ll be quick to notice the inclusion of all manner of N64 devices included in this list. This is a solid indication that during the early Dolphin development stages, N64 hardware was used. It would be very interesting to see if someone could modify an N64 controller with a Gamecube connector to test this detection, but everything else shows up as expected. Also absent from this list is the Gamecube Microphone, which used the memory card slot.

Memory card test:
This test simply connects to the Gamecube memory card and tests for proper communications. When a microphone is inserted into the system, the test will detect it’s presence but fail to communicate properly to it. This program was probably only designed to validate memory cards and no other peripherals.

These tests are among the user selectable tests. These tests offer visual feedback to the technician or require some amount of interaction. The majority of the tests on the service disc require no interaction and can be run in sets, all at once, and even looped for burn-in testing. If these tests fail, the technician is notified of which test failed.

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Now, on to the interesting part… what can you find if you look at the disc contents on a computer? Check out the next page for the findings. Be warned though, some parts of this article may get technical.

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