Steps:
1- Open ModelSim
2- Click Jumpsstart
3- Create new project
4-Choose project directory and name
5- Add exsisting file
6- choose your VHDL file from the project to simulate
7- Compile all
8- Start simulation (the architecture level)
9- View (Wave, Objects)
10- Drag drop all objects and arrange them.
11- based on the number of inputs is 2^8 = 256
12- Assign a falling edge clock to each input by calculating its proper value.
13- RUN
14- Zoom In
15- capture and print results and make sure they are correct.
Good Luck ;)
![](https://i.ytimg.com/vi/ne6kaC4QbRo/maxresdefault.jpg)