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Heeeeeelp please easy for u?

  1. Apr 22, 2005 #1
    heeeeeelp please easy for u????

    Digital Logic Design Lab

    (do this project with circuit maker design (7485 comparator))

    Design 8 bit adder/subtractor (a+b, or a-b) with following:
    1. Inputs: tow operands [A,B](8-bit each),
    load(1-load new data,0-perform operation).

    2. Outputs: 9 - bit (8-bit will be stored in A again).

    3. Modes of operations:

    a. Check if B is 0, then the output will be A.
    b. Check if A is 0, then the output will be B OR B' depend
    on the operation.
    c. Otherwise , perform the addition or subtraction.

    4. Display result on two seven segment displays + 1 LED.

    please if u know the answer help me and i will be thankfull

    i do it dut there is a problem and this is my attachment please do it for me??
  2. jcsd
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