7.7 Sp2 Portable — Proteus

However, if you have a modern PC and an internet connection, do yourself a favor: download for PCB design and use Wokwi or SimulIDE for modern microcontroller simulation. They are free, legal, and far more capable.

Proteus is a popular design and simulation tool used for creating and testing electronic circuits, microcontrollers, and other embedded systems. Developed by Labcenter Electronics, Proteus offers a comprehensive suite of features that cater to the needs of electronics engineers, students, and hobbyists alike. Proteus 7.7 SP2 Portable

: The "Portable" version is not an official release. It refers to a community-modified version designed to run from a USB drive without installation. This became "legendary" in technical forums and universities because it allowed students to carry their entire lab environment between different computers. However, if you have a modern PC and

The ARES module in 7.7 SP2 supports manual and auto-routing. It allows for single, double, and (with some workaround) four-layer board design. It outputs Gerber files (RS-274X) which are accepted by modern fab houses like JLCPCB (though you may need to manually edit the aperture list). This became "legendary" in technical forums and universities

(Deducting points for piracy risk, ancient UI, and lack of modern components).