Summary

In this chapter, we learned how to create combinational logic, how to create different modules, and how to test them as utilize self-checking testbenches. We also explored different optimizations we can perform on the case statement and showed you how to get substantial area savings in some cases, but also how we may have problems if our design assumptions are incorrect. We then mentioned latches and the problems they cause, even when they should be safe.

At this point, hopefully, you have some confidence in how to create logic and test it. In the next chapter, we'll introduce sequential logic; that is, using registers to store values and perform operations. We'll expand upon our simple calculator and see how we can improve it now that we have some storage elements.