Compound: New Open-Source Nintendo Switch Emulator Project Written in C

Compound is an early-stage, open-source Nintendo Switch emulator project written in C, currently available on GitHub under the repository ovsky/compound. The project emphasizes defensive architecture, performance, and cross-platform support across Linux, macOS, Windows, Android, and ARM64.

According to the repository documentation, the emulator is under active, early-stage development and focuses on correctness and system emulation foundations. Switch 2 support is explicitly stated as a research target rather than a shipping capability, with the current build containing no console keys, content decryption, or Switch 2 execution layer.

Core Architectural Features

• Memory System: Uses mimalloc allocator with host accounting, pool, slab, and rewindable arena strategies, along with checked-arithmetic validation.
• JIT Engine: Features the Ballistic ARM64 recompiler aimed at high-performance execution.
• Guest OS Emulation: Implements Horizon OS kernel objects, per-process handles, named services, and basic SVC dispatch.
• Graphics and Title Loading: Includes Vulkan render backend scaffolding and content-based NRO/NSO detection. Encrypted formats such as NCA, NSP, and XCI are refused because the build lacks keys and decryption capabilities.

Practical Implications and Verification

Developers and emulation enthusiasts can review the source code, build instructions, and contribution guidelines directly on the official GitHub repository. Because the software is experimental and relies on staged development, users should consult the documentation in the `/docs` folder for prerequisites, testing suites, and setup procedures.