This is a CHIP-8 emulator written in Rust and compiled to WebAssembly. You can try it here.

1. Select and load a ROM from the list of built-in ROMs, or upload a ROM from your computer.
2. Click Start Game
3. Either use the on-screen keyboard, or use the QWERTY keyboard mapping available when hovering over Hex Keyboard(?)
4. (Optional:) If the ROM is not functioning correctly and it was written for the original CHIP-8 interpreter, try changing the options under Advanced Settings

The actual CHIP-8 CPU emulation is written entirely in Rust, at src/lib.rs, and is a port of my C++ CHIP-8 Emulator that I wrote to practice Rust. I also wrote some JS glue code (static/index.js) to handle the interface and canvas/audio, but I am not a web developer, so it might not be quality JS code.

To compile you'll need the standard Rust toolchain (rustup, rustc, cargo). You also need wasm-pack which automatically generates JS bindings for exported Rust functions. To compile run:

wasm-pack build --target=web --no-typescript --out-dir=static/pkg --release

This repository contains ROMs from badlogic's repo that can be selected in the website.