I need your help with 4 bit ALU logisim

Discussion in 'Homework Help' started by RoRo1, May 10, 2012.

  1. RoRo1

    Thread Starter New Member

    May 10, 2012
    4
    1
    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
     
    sjodiel likes this.
  2. RoRo1

    Thread Starter New Member

    May 10, 2012
    4
    1
    Please any one !
    I need your help :(
     
  3. RoRo1

    Thread Starter New Member

    May 10, 2012
    4
    1
    i am waiting ! :( please guys i know you can help
     
  4. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    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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