What is paging? Explain the concept of memory access in protected mode. [5]

Illustrate memory access in GDT. [5]

Write an Assembly program for calculating the factorial of a number using 8085 microprocessor. [10]

Write an Assembly program to reverse the given string. [5]

Difference between 8085 and 8086 microprocessor. Explain the concept of demultiplexing of address bus and why is it required? [10]

Draw a block diagram of 80286 microprocessor and explain. [10]

Explain different types of system buses and also indicate whether they are unidirectional or bidirectional. [5]

What is the significance of interrupt masking? Difference between vectored and polled interrupt. [5]

What is the importance of direct memory access? Explain the mechanism of direct memory access. [5]

List different types of ports. What are the main characteristics of programmable interrupt controller 8259A? [5]

Difference between instruction cycle and machine cycle. Draw timing diagram of MVI A, 32 H. [5]

Write short notes on: a. Jumps b. Accumulator [5]