Super Mario 64 ported to Microsoft Zune HD media player

Super Mario 64 on Zune HD

Super Mario 64 has been ported to the Microsoft Zune HD media player. The project allows the game to run natively on the device's hardware, leveraging the unofficial OpenZDK kit. The game includes a touchscreen controller overlay and operates with sound and save functionality, mostly at full speed.

Technical Implementation

The port is built upon sm64ex, a fork of the unofficial, decompiled Super Mario 64 PC port. It relies on native ARM code running on top of the Zune HD's operating system via OpenZDK, without modifying the device's firmware. The Zune HD, released in 2009, features Nvidia Tegra hardware, specifically the Tegra APX 2600 chip.

Due to the Zune's graphics driver limitations, which cannot compile OpenGL Shading Language (GLSL) shaders, the project uses an OpenGL ES 2 renderer derived from Fast3D with prebuilt shader variants. Nvidia's cgc and shaderfix tools were used, and blending is compiled into fragment shaders to compensate for the GPU's lack of fixed-function blending hardware.

Performance and Controls

The game's logic runs at 30 ticks per second, though some lag can occur if the Zune cannot keep up. The rendering resolution is 480x272 in landscape mode. Audio synthesis operates on a separate, higher-priority thread, ensuring it is not affected by frame rate fluctuations. The touch control overlay provides a virtual analog stick and all necessary game buttons, with customizable styles and opacity.

Background and Context

The Zune HD was a media player from Microsoft, launched in 2009, featuring an OLED touchscreen and Nvidia Tegra hardware. Microsoft halted Zune production in 2011. An exploit led to the creation of OpenZDK, enabling homebrew development for the device. The Super Mario 64 port relies on a fan-driven decompilation effort of the game completed in 2019, which provided a C source code base.