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NES EMULATOR
zig-nes
ZigNES — an open-source NES emulator written in the Zig programming language with an ImGui-based GUI. According to the project README it implements the CPU, PPU and supports mapper 0 (NROM) and mapper 1 (MMC1).
WHY IT MATTERS
Why this project matters
ZigNES is a small, language-focused emulator project that demonstrates building a classic console emulator in Zig. It serves both as a learning/example implementation for Zig users and as a compact NES implementation useful for experimentation or study of emulation internals.
BEST FOR
Notable strengths
Readable, self-contained codebase in Zig; ImGui GUI included for interactive use; explicit CPU test coverage claims in the README (Tom Harte's nes6502 tests) and documented passing of the legal-opcode tests; clear build instructions for Zig builds using SDL2.
The people behind zig-nes
History and status
The repository on GitHub (jakehffn/zig-nes) contains source, a build.zig and an ImGui-based frontend. The README states the project supports mappers 0 and 1 and that the CPU implementation passes the legal-opcode portion of the Tom Harte nes6502 test suite (excluding cycle timing). The repo shows ongoing commits but does not publish an official packaged release (Releases area exists on GitHub). Issues are present in the repository, indicating active maintenance or at least user feedback. Because historical commit timestamps and author origin are not verified here, dates and author details are left cautious.
What zig-nes supports
- Nintendo Entertainment System (NES)
- Mapper 0 (NROM)
- Mapper 1 (MMC1) — documented as supported in README
- Host platforms: platforms supported by Zig + SDL2 (build instructions reference SDL2 and GLEW; expect Linux, Windows, macOS where Zig and SDL2 are available)
Download and availability
OFFICIAL DOWNLOADS
Get zig-nes
Official source and any prebuilt releases are available from the project's GitHub repository. Build from source using Zig; the README points at the project's Releases section on GitHub for any packaged assets.
Get zig-nes ↗DOCUMENTATION
Official documentation
Read the official configuration, compatibility, and troubleshooting material before changing advanced options.
Read official documentation ↗zig-nes setup guide
Setup note: This guide shows how to build and run ZigNES from the official repository. It assumes you want a native build on a desktop OS and that you are comfortable installing Zig and native libraries (SDL2 and OpenGL/GLEW). The README contains the authoritative build and usage instructions — follow them closely and adjust system-specific library names as needed.
- 1) Get the source: Clone the official repository with submodules: git clone –recurse-submodules https://github.com/jakehffn/zig-nes.git && cd zig-nes. This obtains the code, submodules and build.zig used by the project.
- 2) Install Zig: Install a Zig compiler compatible with the repository. Use the official Zig release for your OS from ziglang.org or your package manager, then ensure the zig executable is on PATH.
- 3) Install native dependencies (SDL2 and GLEW / OpenGL): Install SDL2 and GLEW (or the equivalent OpenGL loader) for your OS. The repository's build expects the SDL2 shared library to have a .dll extension by default, so on Windows use the official SDL2 development binary package. On Linux/macOS you may need to adjust the build.zig or install compatibility packages (SDL2 dev, libglew-dev, or use a GLEW-free build if you modify the build file).
- 4) Configure environment variables (optional): If you keep SDL2 or GLEW in non-standard locations, set SDL2_PATH and GLEW_PATH environment variables to point to those library locations so zig build can find them, as suggested in the README.
- 5) Build: From the repository root run: zig build. If dependencies and paths are correct the build will produce the executable. If zig reports missing libraries, inspect build.zig and adjust library filenames or environment variables as needed.
- 6) Run and load a ROM: Run the built executable. The README documents keyboard controls (W/A/S/D for D-pad; J = A; K = B; Space = Select; Return = Start). The project does not include game ROMs or any commercial firmware; you must provide your own legally obtained ROMs. The emulator supports iNES-format ROMs compatible with mapper 0 and mapper 1.
- 7) CPU tests (optional): The README notes the project uses Tom Harte's nes6502 tests. To run them you must separately obtain the test suite and place it at the expected path (the README references .\test-files\tom_harte_nes6502\v1 relative to the project root). The test suite is not included in the repo.
- 8) Troubleshooting: If the build fails due to library naming or missing headers, check build.zig and edit the expected shared library extensions or search paths for your OS. On modern Zig versions some language changes can break code; if compilation errors reference Zig language/API changes, check the repository issues for patches or fork and update the code for your Zig version.
Software reminder: ZigNES is source-distributed; it does not include commercial games, BIOS, firmware, or ROMs. Obtain ROMs or test suites only by legal means. Compatibility is limited to the mappers documented by the project.
Sources and further reading
Detailed guides and tutorials
Explore step-by-step guides for zig-nes as they are published.