Microprocessors - Jun 2015

Computer Science Engg. (Semester 4)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Draw and discuss the Register Organization of 8086 through core 2 microprocessors(10 marks) 1 (b) Explain the real mode memory addressing of 8086 processor(10 marks) 2 (a) Define paging. Discuss the memory paging with diagram.(8 marks) 2 (b) Explain Data related addressing modes of 8086, with an example(8 marks) 2 (c) Define physical address. Discuss how physical address is generated in 8086 processor(4 marks) 3 (a) Explain the following instruction with an example : i) XLAT ii) LEA iii) CMP iv) MUL v)TEST(10 marks) 3 (b) What are assembler directives? Explain the following assembler directives with an example iii) an example
i) PUBLIC ii) ORG iii) DW iv) ASSUME.(7 marks) 3 (C) What is meant by segment oxer-ride prefix? Explain with examples(3 marks) 4 (a) Discuss shift and rotate instructions. with an example.(8 marks) 4 (b) Explain FAR procedure and near procedure With an example(6 marks) 4 (c) Write an assembly level program to reverse a given string and string and check for palindrome(6 marks) 5 (a) What are the differences between a PROCEDURE and a MACRO?(4 marks) 5 (b) Write an 8086 ALP using DOS interrupt to read a two hexadecimal number and display the same on monitor.(8 marks) 5 (c) Define Modular programming. Explain various phases in program development and execution in the context of modular programming.(8 marks) 6 (a) Explain the functions of the following 8086 signals
i) ALE ii)MN/MX iii)NMI iv) QS0,QSI v)REST vi)R(6 marks) 6 (b) Indicate the signals which are different when 8086 in minimum mode and in maximum mode:(4 marks) 6 (c) Describe the working of 8086 in minimum mode configuration.(10 marks) 7 (a) Discuss in brief commonly used memories.(8 marks) 7 (b) With neat diagram, explain the Linear decoding techniques(8 marks) 7 (c) Compare and contrast the memories mapped I/O to I/O mapped I/O(4 marks) 8 (a) Draw and discuss the Interrupt structure of 8086(6 marks) 8 (b) With functional block diagram, explain working principle of8255 PPI(8 marks) 8 (c) Discuss the DMA controller Operating in a microprocessor system.(6 marks)