I need your help with 4 bit ALU logisim

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RoRo1

Joined May 10, 2012
4
Hi guys
I really need your help
My project is to design ALU using Logisim , and i really know nothing about this program

I did what my instructor told me to do , but when i come to fill the table
i didn't understand any thing
would any one kindly help me please


i attached my project , and what i did

Many thanx
 

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MrCarlos

Joined Jan 2, 2010
400
Hello RoRo1

There Are two things:
Because you really know nothing about Logisim
You can not fill the table.

Let me help a little:
The button on the left must be setup accordingly your needs. Part of the statement say.
A = 7… so you must set: A3=0, A2=1, A1=1 And A0=1 = 0111 Binary.
B = value of the last digit in you student ID plus 1; So If Your ID Is 125 take the 5 and add 1, is 6.. Right ?
So B bust be equal to 0110 = B3=0, B3=1, B2=1, B0=0.
Make this initial SetUp on Inputs A’s & B’s then change all Sx to perform the different functions:
Control signal
S1 S0 Operation
0 0 A and B
0 1 A or B
1 0 A xor B
1 1 A + B + C0

And Record The Results In The Outputs Fx & Cout3 in your table.

regards
at your service
 

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