Virtual Labs
IIT Kharagpur

4-bit Slice ALU

Prerequisites

Download the COA simulator form the below link

http://vlabs.iitkgp.ac.in/coa/

Open command prompt terminal (‘cmd’ from Start panel) and run the simulator using

"java –jar Simulatornew.jar"

After opening the simulator, press the steps button below

Prev

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Step 10

Step 11

Next

Step 1

In simulator on the right side go to Other Components under Palette, select the ALU 1-bit module.

Step 2

From the right side pallete under Other Components, place the ALU 1-bit module on the workspace.

Step 3

To see the pin configuration of the ALU 1-bit module, use see pin configuration button on the toolbar on top of the simulator.
On click, it opens a Pin Configuration floating window.

Step 4

To perform the experiment, we need five bit switches (A0, B0, C0, S0, S1) to give input.
Add five bit switches from Input/Output under Palette

Step 5

To perform the experiment, we need two bit displays (F0, Cout) to see the output.
Add two bit displays Input/Output under Palette

Step 6

Now connect the input to the ALU 1-bit module. Select the Connection on Palette, then click on bit switch and Pin 9.
Use the pin configuration floating window to identify input and output pins of the module.

Step 7

Repeat step 6 to connect all other components.

Step 8

Place the Label on the workspace as required to label inputs and outputs from Circuits and Label under Palette on the right side.
Set the label name using Set Labels and Names on the left side panel. Now the circuit for ALU 1-bit is ready for simulation.

Step 9

Now simulate the circuit use the Simulate button (play button) in the toolbar on top.
To change the value of the bit switches from 0 to 1 or 1 to 0 , double click on bit switch.
Now save your circuit using the Save button in the toolbar on top.

Step 10

Now repeat the above steps to design the 4-bit slice ALU.
Make sure you connect all the select pins to two bit switches only.

Step 11

Now simulate the circuit use the Simulate button (play button) in the toolbar on top.
To change the value of the bit switches from 0 to 1 or 1 to 0 , double click on bit switch.
Now save your circuit using the Save button in the toolbar on top.