Link: Wasm Rust CHIP8 - A CHIP8 emulator written in Rust running Wasm

Colin Eberhardt has written a CHIP-8 emulator in Rust and targeted it for WebAssembly.

Read how he did it:

Writing a CHIP-8 emulator with Rust and WebAssembly

The post contains a detailed break down of how to write an emulator, along with the challenges of sharing data between Rust and WebAssembly.