For the unit 3 assignment, there will be three tasks:

First you must create a logic circuit using only basic gates such as AND, OR, NOR, NAND, NOT, etc. to implement an ADDER capable of adding two 4 bit binary numbers.

Second you must create a logic circuit using only basic gates such as AND, OR, NOR, NAND, NOT, etc. to implement a Subtractor that is capable of subtracting the second number from the first, by converting the second number into its 2's complement form and then adding the resulting number to the first number. You do not need to worry about accomodating the addition or subtraction of negative numbers as part of your assignment.

Finally, for the third part of the assignment you must create a limited ALU (Arithmetic logic unit) circuit using Logism that implements a Full …show more content…
When it is 0 the adder circuit should be selected and when 1 the subtraction circuit should be selected. Of the output of the computation should be on the right.

Your circuit should follow this basic format, but you must design all of the actual circuits to perform addition and subtraction. You must design the actual connections between components what I have represented below is just to give an idea of where you should put the inputs, outputs, and processing that occurs in between.

alu%20example.jpg

Complete and test your circuit using Logism and submit the following materials.

Using the export image feature in Logism (Use File-Export Image from menu), export your circuits in jpeg format include it as part of your post. Moodle has the ability to insert a jpeg image. Save your Logism models as a circ files and attach the files to your assignment posting.

Your submission
You have not submitted your work yet
Skip Navigation
Navigation