Microprocessor

a) Explain the working of 8255 and its operating modes.

e) Find the physical addresses of First and last location of a segment. The segment base is 1000h.

b) List advantages of segmentation.

a) Compare 8085, 8086 and 8088 microprocessors.

b) With a neat block diagram explain the architecture of 8086.

a) Describe the function of 8086 Flag register.

b) Draw block diagram of USART and explain the format of its mode word.

a) Explain with neat diagram working of 8253.

b) Draw and explain the working of DMA controller.

Attempt all questions briefly in not more than fifty words:

a) Describe the difference between instruction MOV AX, 2437 and MOVAX, (2437)

b) Specify the four-control signal commonly used by the 8085

c) Explain the following instructions: DAA, STA

d) What is the importance of Flag register? When are the various flag register set.

e) if the memory chip size in 256x1 bits, how many chips are required to make up 1K(1024) bytes of memory

f) Differentiate between Direct and Indirect addressing mode

g) What is the need of multiplexing address and data bus in 8085?

h) Write the format of control word of 8255

i) Explain the difference between memory mapped I/0 and Peripheral mapped I/0.

j) Why is the address bus uni-directional in 8085.

b) Explain the difference between memory mapped and Isolated I/O. 

a) Explain Cascading of 8259.

b) Write an assembly language program to generate a time delay of 1 ms.

a) Draw and explain the block diagram of 8259.

b) Write an assembly language program to convert 8 bit BCD numbers to its equivalent Binary number

a) Explain the working of RIM and SIM instructions.

b) Write an assembly language program to arrange 100 numbers in ascending order 

a) Explain memory Read Cycle with the help or me diagram.