More advanced routing modes are included in Proteus PCB design level 2 and higher whilst simulation capabilities can be enhanced by purchasing the advanced simulation option and/or microcontroller simulation capabilities. All Proteus PCB design products include an integrated shape based autorouter and a basic SPICE simulation capability as standard. Proteus PCB Design v6.5 SP5 16.5MB Proteus PCB design combines the ISIS schematic capture and ARES PCB layout programs to provide a powerful, integrated and easy to use suite of tools for professional PCB design.