GCC Test Suite (GTS for short) is an open source GameCube controller tester, and an alternative to SmashScope.

Currently not feature-complete, but in a workable state.

(This project was originally developed under the name FossScope)

• Polls at ~2000 hz in the oscilloscope menus, ~120 hz otherwise.
• Current menu options:
  • Controller Test - Shows the overall state of a controller visually. Also shows origin information.
  • Stick Oscilloscope - Shows short recordings of a stick over time. Includes Melee-specific tests.
  • Continuous Stick Oscilloscope - Continuously records stick inputs over time. Can be "Frozen", and zoomed.
  • Trigger Oscilloscope - Shows analog and digital state of either trigger over time.
  • Coordinate Viewer - Shows stick coordinates on a circle, with Melee-specific coordinate overlays.
  • 2D Plot - Shows a recording of a stick on a 2d plot of its axis. Shows buttons pressed and frame intervals. Includes Melee-specific stickmaps.
  • Button Timing Viewer - View state of sticks and buttons over time. Analog values have adjustable thresholds. Shows timing information in frames.
  • Gate Visualizer - Shows the rough state of a given stick gate. Measured by moving the stick slowly around the gate.
  • Export Data - Exports a recording from certain above menus to csv format.
• Recordings from some menus can be viewed in other menus. An asterisk will appear next to a menu entry to indicate this.
• Works on GameCube and Wii, at 480i and 480p.

• Polling rate is not perfectly uniform. This is something that can't be dealt with easily while also reading at a high rate. Polling in progressive scan seems to be much better, however.
• Specific tests need confirmation for correctness.
• Overall layout needs another pass for usability, see this issue for details.
• A lot of logic that shouldn't be in menu.c is, needs to be moved to other files.
• Other things I can't think of right now...

Grab the latest release in Releases.

• Gamecube: Download GTS_GC.dol, and place it in a location you can launch it from. Having a way to load Swiss is preferred.

• Wii: Download wii.zip and extract it to the Wii's SD card. Then, launch from the Homebrew Channel.

• Dolphin: Download GTS_GC.dol, and open it via Dolphin. Note that GTS requires a recent version to function (2506a or newer), and that Dolphin support is considered secondary to real hardware.

• Install devkitpro
  • Follow the instructions for your device from here
• Install libogc2
  • Add the extremscorner repo
• Run sudo (dkp-)pacman -S libogc2 libogc2-libdvm-git
  • The (dkp-) is for systems that don't normally have pacman. On those systems, any command should use dkp-pacman
  • Systems that normally use pacman should run pacman
• Run make in the root of the project
• A numbered release can be made with make release <version string>, or using the bash script to also make a distributable zip file for wii

For problems, open an issue. Be sure to check CONTRIBUTING.md to make things easier. Please don't DM me.

Originally, I wanted a test program that worked on Gamecube, since SmashScope was for Wii only. I got motivation to pick up the project again after the website for SmashScope went down, and made significant progress since then.

• The PhobGCC team (especially for PhobVision, this wouldn't have been done without referencing it repeatedly). Also thanks for putting up with me in the Discord :)
• SmashScope and its creators for giving me a baseline to strive for
• The DevkitPro team and Extrems for making stuff like this a lot more accessible
• bkacjios / m-overlay for button assets
• Z. B. Wells for being my "Archaic Language Consultant"