I am using Windows XP and Vivado 2014.2 webPack. I follow this tutorial: https://github.com/charlespittman/massive-ironman/blob/master/school/elec_311/Xilinx%20ISE%20WebPACK%20VHDL%20Tutorial.pdf It is little bit old. But I succeed to fix what needed (for example to create suitable xdc instead of ucf), and compile successfully (it generate bitstream file). My question is as follow. I have basys3 board, but as first step I want to make some simulations only on computer. For example I want (virtually) to press user switches, and look at (virtual) led. With what software I can do this?