The Nios II EDS includes: Nios II Software Build Tools for Eclipse, a fully integrated graphical development environment; GNU tools (GCC compiler, GDB debugger) Software examples and templates, device drivers, and bare-metal hardware abstraction layer (HAL) Free Nichestack TCP/IP Network Stack, Nios II Edition, commercial grade network stack using Nios II example designs, SOPC Builder, and the Nios II software build tools. It also describes the process of running the Nios II RTL simulation in the ModelSim simulator. The increasing pressure to deliver robust products to market in a timely manner has amplified the importance of comprehensively verifying embedded processor designs.