To investigate arithmetic circuitry. Arithmetic circuits play a central role in the operation of a microprocessor.

Readlab lecture notes.

- Obtain the state table, state diagram, and functions of the following sequential design.

Implement the design and verify the state table.

Use the 4-bit Shift Register to store and display the result of0011 + 0001 ------ 0100

**Hand-In**- State table
- State diagram
- Functions
- Results of 0011 + 0001 (stored in the 4-bit Shift Register with MSB and LSB labelled)

- Obtain the state table, state diagram, and functions of the following sequential design.

Implement the design and verify the state table.

Use the 4-bit Shift Register to store and display the result of0101 - 0011 ------ 0010

**Hand-In**- State table
- State diagram
- Functions
- Results of 0101 - 0011 (stored in the 4-bit Shift Register with MSB and LSB labelled)

- Implement the following bit sequential Adder-Subtractor design.

X and Y are two operand inputs and Z is for the control signal i.e. Z is the selection bit.

When Z has value 0, the circuit is an adder, meanwhile, the D flip-flop should be initialized to 0 for each addition.

When Z has value 1, it performs subtraction, meawhile, the the D flip-flop should be initialized to 1 for each subtraction.Test your Adder-Subtractor circuit on the following operations and use the 4-bit Shift Register to store and display their results. (Note: Start from the least significant bit and remember to initialize the D flip-flop accordingly) 0001 + 0011 = ? 0101 + 0010 = ? 0101 - 0011 = ? 0011 - 0101 = ?

**Hand-In**- Four test cases above (with MSB and LSB labelled)
- Description of the testing procedure used for Question 3