rig

The command line tool "rig" is a utility used for simulating digital logic circuits. It allows developers and engineers to design and test their hardware logic before implementation.

Rig supports a variety of logic gates including AND, OR, NOT, NAND, NOR, XOR, XNOR, D flip-flop, and more. It also supports various types of logic blocks such as muxes (multiplexers), decoders, encoders, and adders. These components can be interconnected to construct complex circuits.

With rig, users can define their logic circuits using a simple text-based Hardware Description Language (HDL). The tool provides a simulation engine that can execute and test the circuit behavior, allowing users to verify the correctness of their designs.

Rig offers features like input stimulus patterns, debugging capabilities, and visualization of circuit outputs. It provides a textual representation of the circuits being designed and the ability to analyze waveforms to aid in debugging.

This command line tool is highly useful for hardware designers to prototype and validate their circuit designs without the need for physical hardware. It allows users to gain confidence in their designs before moving on to actual implementation, saving time and effort in the development process.