: 64-bit Windows allows Proteus to use more than 4GB of RAM, strictly preventing crashes during massive 3D board renders or complex system simulations.

The crown jewel of Proteus. VSM allows you to simulate microcontrollers in real-time. You can write code in C or Assembly, load the HEX file, and watch the simulated LEDs blink, motors spin, or LCD screens display text. Supported families include:

Version 8.1 introduced several important bug fixes and improvements from its predecessors, such as enhanced keyboard shortcuts, a new "Go to line" command in the VSM Studio, and resolutions for various potential crashes in the interactive auto-routing and design rule manager functions. Importantly, this version involved a change to both the file and library formats, making them not backwardly compatible with version 8.0 and older.

Proteus with other EDA tools (like Altium Designer or KiCad).