【CSE1201】Computer Systems and Assembly Language and Lab

(You can submit many times. Your grade will be the grade of

your last submission, prior to the deadline).

Minimum Submission Requirements

●

You will be submitting the following files:

○ part_a.dig

○ part_a.txt

○ part_b.dig

○ part_b.txt

○ part_c.dig

○ part_c.txt

Note

To make life easier on yourself, create a directory called:

CSE12_Labs, under that directory create subdirectories: Lab1, Lab2, Lab3,

Lab4. This will keep you organized for the rest of the quarter. You

will not be submitting the directories with the lab. This suggestion is

just to keep your work organized.

Objective

This lab will introduce you to a schematic entry and logic simulation program

called Digital . In this lab you will practice creating truth tables and

implementing logic based on those truth tables.

To install Digital:

1. Ensure you have a Java Runtime Environment (or JRE) on your computer.

You can download it included in the JDK (Java Development Kit) which

would also allow you to write your own Java programs. You can download

the JDK from here . This location has installation options for Mac,

Windows and Linux. You will most likely want the 64-bit version.

2. Download

Digital.zip

and uncompress it.

3. In the Digital folder open Digital.jar to run it.

Tutorial

Before starting the lab assignment, follow this tutorial on how to build a

very simple circuit.

●

Start a new circuit by inserting an input, graphically depicted as

form:

into the graph from Components->IO.

●

Place a second input below the first. You can either select “input”

again from Components->IO or you can click on the input icon in the

upper right toolbar, which displays recently used components.

●

Select an “Exclusive Or” (XOR) depicted as: from Components-

>Logic and place it to the right of the two inputs. NOTE: If XOR gate

has not yet been discussed in class as of you reading this sentence,

proceed to the section Appendix .

●

Select an output

from Components->IO and place it to the right of

the XOR gate.

●

Connect the inputs to the XOR gate by clicking on the red dot of the

input and then on one of the XOR’s blue dots.

●

Connect your XOR gate to your output in the same way.

●

Now that you have a functioning circuit, you can start a simulation by

clicking the Play button

in the toolbar. Test some different inputs

to ensure the XOR gate works the way you want it to.

●

Once you have explored the functioning circuit, stop the simulation

with the

Stop button

in the toolbar.

●

Finally, label your inputs and output by right clicking on them

(control-click on Mac.)

Resources

You can find the English documentation for Digital under

Help-> Documentation:

You can also find the documentation in various other languages here

Finally, a video walk-through of the tutorial can be found here

Specification

For all parts of the design, assume an ON LED represents “1” and an OFF LED

represents “0.”

Part

A

For Part A, implement the truth table below using either CANONICAL Sum of

Products (SOP) or Product of Sums (POS) using gates, not transistors.

Label your inputs and outputs exactly as is shown below (wrong case or

spaces will fail the auto-grade) , as they will be referenced in grading.

You MUST not simplify the SOP/POS expression at this stage!