TetaNES Core

📖 Summary - ✨ Features - 🚧 Building - 🚀 Getting Started - ⚠️ Known Issues - 💬 Contact

Summary

photo credit for background: Zsolt Palatinus on unsplash

This is the core emulation library for TetaNES. Savvy developers can build their own custom emulation libraries or applications in Rust on top of tetanes-core.

Some community examples:

• NES Bundler - Transform your NES-game into a single executable targeting your favourite OS!
• Dappicom - Dappicom is a provable Nintendo Entertainment System emulator written in Noir and Rust.
• NESBox - NESBox's vision is to become the preferred platform for people playing online multiplayer games, providing an excellent user experience for all its users.

Minimum Supported Rust Version (MSRV)

The current minimum Rust version is 1.85.0.

Features

• NTSC, PAL and Dendy emulation.
• Headless Mode.
• Pixellate and NTSC filters.
• Zapper (Light Gun) support.
• iNES and NES 2.0 ROM header formats supported.
• Over 30 supported mappers covering >90% of licensed games.
• Game Genie Codes.
• Preference snd keybonding menus using egui.
  • Increase/Decrease speed & Fast Forward
  • Save & Load States
  • Battery-backed RAM saves

Building

To build the project, you'll need a nightly version of the compiler and run cargo build or cargo build --release (if you want better framerates).

Getting Started

Below is a basic example of setting up tetanes_core with a ROM and running the emulation. For a more in-depth example see the tetanes::nes::emulation module.

use tetanes_core::prelude::*;

fn main() -> anyhow::Result<()> {
    let mut control_deck = ControlDeck::new();

    // Load a ROM from the filesystem.
    // See also: `ControlDeck::load_rom` for loading anything that implements `Read`.
    control_deck.load_rom_path("some_awesome_game.nes")?;

    while control_deck.is_running() {
      // See also: `ControlDeck::clock_frame_output` and `ControlDeck::clock_frame_into`
      control_deck.clock_frame()?;

      let audio_samples = control_deck.audio_samples();
      // Process audio samples (e.g. by sending it to an audio device)
      control_deck.clear_audio_samples();

      let frame_buffer = control_deck.frame_buffer();
      // Process frame buffer (e.g. by rendering it to the screen)

      // If not relying on vsync, sleep or otherwise wait the remainder of the
      // 16ms frame time to clock again
    }

    Ok(())
}

Stability

The aim is for general stability, but the version isn't 1.0 yet and there are several large features on the roadmap that may result in breaking changes. This applies to both APIs and save file formats.

Once some of these larger features are completed, and 1.0 is released, more effort will be dedicatged to versioning these files for backward compatibility in the event of future breaking changes.

Known Issues

See the github issue tracker.

Contact

For issue reporting, please use the github issue tracker. You can also contact me directly at https://lukeworks.tech/contact/.