1. Simplify the following Boolean function in the form of:

Sum of products, and

Product of sums.



2. Design a BCD-to-Excess-3-code converter using minimum number of NAND gates.

3. Design a combinational circuit using ROM. The circuit accepts a 3-bit binary number and generates its equivalent excess-3 code.

4. A combinational circuit is defined by the following functions


Implement the circuit with a PLA having three inputs, four product terms, and two outputs.

5. Design a counter with the following binary sequence:
6 and repeat.
Use JK flip-flops.

6. Obtain the following realizations

T flip-flop from D flip-flop

D flip-flop from SR flip-flop

7. Design a sequence detector circuit to detect a serial input sequence of 1010. It should produce an output 1 when the input pattern has been detected.

8. Explain the architecture of Intel 8085 with the help of a neat block diagram.

9. What do you mean by addressing modes What are the different addressing modes supported by 8086

10. Write an assembly language program to find out the number of positive numbers and negative numbers from a given series of signed numbers.