RGate is a spiritual successor to TkGate: a place to build, explore, and understand digital circuits. Draw schematics, connect gates, and organize larger designs into reusable modules—or write Verilog modules and connect them to your circuits.

Run your designs, change inputs, and watch the results through LEDs, displays, and waveforms. Step through circuit behavior and look inside module instances to see how the pieces work together. Browse the user documentation.

Explore the example circuits, from simple adders to a VGA controller and an LC-3 computer. Open one, follow the signals, and make it your own.

Install the Xcode command-line tools (xcode-select --install), Rust 1.88 or newer, and Python 3. From the repository root:

./scripts/bundle-macos.sh
open target/RGate.app

This builds a release binary for your Mac's architecture and packages it with its icon and licenses in target/RGate.app. Drag the app into /Applications to install it. For a faster development build, use ./scripts/bundle-macos.sh dev.

Verilog simulation uses external Icarus Verilog tools; they are not bundled. Install them with brew install icarus-verilog if you need Verilog support. Built-in gate simulation does not require them.

The script ad-hoc signs the app for local use. Distribution to other Macs requires Developer ID signing and notarization to avoid Gatekeeper warnings.

The icon reuses the documentation's AND-gate symbol. Its editable source is assets/rgate-icon.svg; the bundle script generates all macOS icon sizes from the checked-in assets/rgate-icon.png. After editing the SVG, regenerate the 1024×1024 PNG with rsvg-convert and rebuild the bundle:

brew install librsvg
rsvg-convert -o assets/rgate-icon.png assets/rgate-icon.svg
./scripts/bundle-macos.sh