WASM-4

Build retro games using WebAssembly for a fantasy console

About

WASM-4 is a low-level fantasy game console for building small games with WebAssembly. Game cartridges (ROMs) are small, self-contained .wasm files that can be built with any programming language that compiles to WebAssembly.

Key Features

• No Glue Code: If you've ever tried to write even a simple "Hello World" with WebAssembly before, you'll know it usually involves writing a bunch of JS and HTML glue. WASM-4 removes all of that, games interface directly with the system through a small API.

• Minimalist: Fantasy consoles force developers to work with limited resources. This makes them simple to learn, and easier to focus on finishing your game.

• Language Agnostic: Use any programming language, as long as it can compile to WebAssembly. Out of the box we currently support: AssemblyScript, C/C++, Rust, Go.

• Portable: WASM-4 is designed to run on any device that can execute WebAssembly, even outside of the web! We're planning a lightweight implementation written in C that will run even on a potato.

🚀 60 Second Quickstart

# Install the w4 command
npm install -g wasm4

# Create a project
w4 new --assemblyscript hello-world

# Setup toolchain
cd hello-world
npm install

# Build and run your game!
npm run build
w4 run build/cart.wasm

For more info and guides, check the full documentation.

🎮 Hardware Specs

• Display: 160x160 pixels, 4 customizable colors, updated at 60 Hz.
• Memory: 64 KB linear RAM, memory-mapped I/O, save states.
• Cartridge Size Limit: 64 KB.
• Input: Keyboard, mouse, touchscreen, up to 4 gamepads.
• Audio: 2 pulse wave channels, 1 triangle wave channel, 1 noise channel.
• Disk Storage: 1024 bytes.