Madras University (UnOM) 2010 B.C.A Computer Application Microprocessor and it applications - Question Paper

PART-A(2 marks)
1.what is a microcomputer?
2.what is an assembler?
3.list the 4 operations of commonly performed by the mpu.
4.list the arithmetic operations related to memory.
5.list the different addressing modes of 8085.
6.write the steps for converting a 2-digit BCD number into its binary equivalent.
7.what is time delay?
8.define looping and indexing.
9.what is a subroutine?
10.what is a TRAP?
11.what are the 2 signals available on the 8085 for DMA controller?
12.what are the functions of the instruction SIM?

PART-B(5 marks)
13.discuss the internal data operations of 8085.
14.discuss any 3 instructions related to rotating the accumulator bits.
15.explain the 3 categories of branch instructions.
16.explain the concept of designing a counter
17.write a subroutine to subtract 1 packed BCD number. the minuend is placed in register B,and the subtrahend is placed in register C by the calling program. return the ans into the accumulator.
18.explain the 3 steps to communicate with peripherals through 8255A.
19.explain the 2 DMA execution modes.


PART-C(10 marks)
20.discuss the internal architecture of the 8085
21.explain the arithmetic instructions with example.
22.discuss about subroutine documentation and parameter passing.
23.write a program to count continuously in hexadecimal from FFH to OOH in a system with a 0.5 micro 2nd clock period. use register C to set up a 1 millisecond delay ranging from every count and display the numbers at 1 of the output ports.
24.explain the different 8085-vectored interrupts.

Earning:   Approval pending.