EXTRA QP-1(MICROPROCESSOR)

PART-A

1. What is a microcontroller?.
2. What is an assembler?
3. Write the assembler instruction format.
4. List the arithmetic operations related to memory.
5. What are the instructions related to rotating the  accumulator bits.
6. Write the steps for converting a 2-digit BCD number  into its binary equivalent.
7. What is the purpose of CMC and STC instructions?
8. Define looping and indexing.
9. What is the purpose of the instruction DAA?
10. What is a TRAP?
11.What are the two modes of data transfer under DMA  controller?
12.What are the functions of the instruction SIM?

PART-B

13. Explain the purpose of various flags in 8085.
14. Discuss any three instructions related to rotating the  accumulator bits.
15. Explain the data transfer instructions with example.
16. Explain the concept of designing a counter.
17. Define the stack, the stack pointer and the program  counter, and their uses.
18. Write an assembly language program to convert binary to BCD.

PART-C

20. Describe the internal data operations and the 8085  registers.
21. Explain the arithmetic instructions with an example.
22. Discuss about conditional call and return statements of 8085 with an example.
23. Write an assembly language program to count  continuously in hexadecimal from FFH to OOH in a  system with 0.5 micro second clock period. Use  register C to set up a one millisecond delay between  each count and display the numbers at one of the output ports.
24. Write an assembly language program for BCD to  seven segment LED Code conversion.