https://github.com/nathsou/nessy

NES emulator for the web
https://github.com/nathsou/nessy

6502-assembly audio emulation emulator famicom nes nes-emulator roms rust wasm web webassembly

Last synced: about 1 month ago
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NES emulator for the web

• Host: GitHub
• URL: https://github.com/nathsou/nessy
• Owner: nathsou
• Created: 2020-12-02T06:06:06.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2024-08-30T20:26:02.000Z (4 months ago)
• Last Synced: 2024-10-11T20:42:55.716Z (2 months ago)
• Topics: 6502-assembly, audio, emulation, emulator, famicom, nes, nes-emulator, roms, rust, wasm, web, webassembly
• Language: Rust
• Homepage: https://nathsou.github.io/nessy/
• Size: 1.14 MB
• Stars: 3
• Watchers: 1
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# NESSY

![Logo](resources/logo.png)

**A Nintendo Entertainment System (NES) emulator for the web**

[Play it online](https://nathsou.github.io/nessy/)

## Screenshots

![Metroid](resources/metroid.png)

![Super Mario Bros.](resources/smb.png)

![Tetris](resources/tetris.png)

![Contra](resources/contra.png)

![The Legend of Zelda](resources/zelda.png)

![Super Mario Bros. 3](resources/smb3.png)

![Kirby's Adventure](resources/kirby.png)

![Castlevania](resources/castlevania.png)

![Mega Man 2](resources/megaman2.png)

## Features

- Save states (CTRL+S to save, CTRL+L to load last)

- Customizable controls

- Full Screen mode

- Working audio

- Auto generated ROM backgrounds in the library

- Save state preview in the saves menu

- Gamepad support

- Supported mappers: [NROM](https://nesdir.github.io/mapper0.html) (0), [MMC1](https://nesdir.github.io/mapper1.html) (1), [UNROM](https://nesdir.github.io/mapper2.html) (2), [MMC3](https://nesdir.github.io/mapper4.html) (4)

## Settings Menu

Press ESC / Tab to toggle the UI

Use the arrow keys to navigate the menus and press enter to validate

![Library](resources/library.png)

![Saves](resources/saves.png)

## Todo / Ideas

- Support more mappers (3, 66, 118, ...)

- Use an AudioWorkletNode instead of a scriptProcessor

- Lock framerate at 60fps even on higher refresh rate displays

- Support iNes 2.0 roms

- Support Joypad2

- Time travel mode (Save states recorded at regular intervals)

- Replay mode (Replay all inputs from the start)

- Different color palettes

- Better UX

- VR / 3D mode with sprites in front and bg tiles in the background?

- Optimize! (JIT Compiler / frame by frame or scanline by scanline rendering instead of pixel by pixel)

- Wide mode (for scrolling games, visualize the prefilled tiles in advance)

## Embedding

Nessy can easily be embedded on other platforms, see the `3ds/` folder for a 3ds port (no sound and very slow frame rate for now).

![3DS](resources/3ds.png)