number from the first by converting the second number into its 2s complement

Number from the first by converting the second number

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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 Adder circuit capable of adding 2 – 4 bit binary numbers and subtracting 2- 4 bit binary numbers. You must also implement the ability to select a bitwise AND operation and a bitwise OR operation. For the ALU it is acceptable to use the Adder and Subtractor circuits that are listed under the "Arithmetic" folder in Logism. Please check the video lecture on Logism tips and tricks to learn how to use multi bit pins, and how to set up different gates to support more than 1 bit. If you would like to use YOUR adder or subtractor circuit in your ALU that is not only acceptable but would be preferred (it is not required as it will make the circuit much more complex) in order to do this you should learn to make use of the splitter that is located in the "Wiring" folder in Logism as this can simpify wiring all of the functions together. This assignment demonstrates many of the key elements that are required for an operational ALU (Arithmetic Logic Unit). First of all we are providing two inputs or operands which will be used in a computation. We are implementing four of the most important computations including add, subtract, bitwise AND, and bitwise OR. Obviously this would not be a complete ALU, but it does provide us with an understanding of the operation of the ALU and gives us some experience with designing components of the ALU.
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  • Fall '17

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