Lab Description:

In this lab you will creating some combinational logic circuits. Don't worry if we haven't covered this in class yet, the lab manual does an excellent job explaining what you need to know.

The components you are building in this lab are important. You will be building future projects based on these components. Through labs SW#$1$ through SW#$4,$ you will be creating $15$ components that will be combined to create a simple microprocessor. You might find it useful to have a chart that shows how your components will build on each other to create your computer. You can find that chart here: SW Lab Dependency Chart $(120).$pdf Download SW Lab Dependency Chart $(120).$pdf$.$ Because later components build on earlier components, testing is important to make sure each circuit works correctly.

This lab starts on page $57$ of your Lab Manual. In this lab, you will start a pattern that you will use a lot going forward: building sets of files that work together $($a circuit, a component based on that circuit, and a circuit which demonstrates that the component is working correctly$).$ In this lab, this will be a $1-$bit half$-$adder. Notice the naming convention: ha$\_1.$cct for the half$-$adder circuit, HA$\_1$ for the half$-$adder component $($which will be in your library jsmith.clf$),$ and ha$\_1\_$demo.cct for the half$-$adder demonstration circuit. Also note that the $\_1$ stands for $1-$bit. Later you will be making circuits, components and demos for other bit$-$lengths $(2,4,$ etc.$).$

The demo file is the one that I will be testing. It should use the final component, not the individual gates. That means that your ha$\_1\_$demo should look like this:

ha$\_1\_$demo.JPG

Not like this:

ha$\_1\_$demo$-$BAD.JPG

Please Note: Make the demo very easy for the instructor to operate. The demo should have binary switches or hex keypads on the left side, the circuit or components in the middle and binary probes or hex displays on the right. Label inputs and outputs so I can quickly see that your circuit is working.

If the circuit is demonstrating something with $4$ inputs or outputs, use hex keypads and hex displays.

Make sure you turn in all of your files listed at the end of the lab, not just the demo circuit.

Notes:

The lab manual talks about writing a lab report. We will not be doing this. Your circuits will speak to your success on this project.

The manual includes a "Lab Report Grade Sheet" and "Self$-$Assessment Worksheet". These are not needed.

The components in your Library are cumulative, but I only list the new ones that are required. For example, your library $($e$.$g$.$ smith.clf$)$ should contain HA$\_1,$ INC$\_4,$ and SUB$\_$TRY. SUB$\_$TRY was added during SW Lab #$0.$

Make sure the file names and components match the required names exactly: Spelling, Upper$/$Lowercase$,$ Underscores.

For the $4-$bit Incrementor, you need a Binary Switch attached to the INC input, so you can choose to increment or not. Despite the fact that LogicWorks erroneously allows you to attach a wire to that little line hanging off the keypad, that it NOT a signal. That little line just indicates which line is the Least Significant Bit $($LSB$).$

Required Activities:

Read through the Lab and perform each of the activities.

What to Submit:

Circuit Files

$2$s$\_$comp$\_$demo

$4\_$bit$\_$inc$\_$demo

ha$\_1$

ha$\_1\_$demo

Library Components $($in flast.clf$)$

See attachment

Can you show me how to create this is full lab in logicworks please?