Computer Organization - Dec 2014

Computer Science Engg. (Semester 3)

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) Explain the basic operational concepts between the processor and the memory.(8 marks) 1 (b) How to measure the performance of the computer? Explain.(6 marks) 1 (c) Write a note on byte addressability, big-endian and little-endian assignment.(6 marks) 2 (a) What is an addressing mode? Explain any four types of addressing modes, with example.(8 marks) 2 (b) With example, explain subroutine stack frame.(6 marks) 2 (c) Explain how to encode the instructions into 32-bit words.(6 marks) 3 (a) What is an interrupt? With example illustrate the concept of interrupts.(6 marks) 3 (b) Explain in detail, the situations where a number of devices capable of initiating interrupts are connected to the processor? How to resolve the problems?(8 marks) 3 (c) Explain the two approaches for bus arbitration.(6 marks) 4 (a) Describe how a read operation is performed on a PCI bus.(10 marks) 4 (b) List the sequence of events that takes place when a processor sends a commands to the SCSI controller.(10 marks) 5 (a) Discuss the internal organization of a 2M×8 asynchronous DRAM chip.(10 marks) 5 (b) Describe the different mapping functions in cache.(10 marks) 6 (a) Write the logic diagram of 4-bit carry look ahead adder. Explain the operation.(6 marks) 6 (b) Perform multiplication for -13 and +9 using Booth's algorithm.(6 marks) 6 (c) Write the circuit arrangement for binary division. Perform the restoring division for the given binary numbers 100�11, show all the cycles.(8 marks) 7 (a) Explain the three-bus organization of the processor.(8 marks) 7 (b) Discuss the organization of hardwired control unit.(8 marks) 7 (c) Write the micro-routine for the instruction Add-(Rsrc), Rdst.(4 marks) 8 (a) With a neat diagram, explain the organization of a shared memory multiprocessor.(8 marks) 8 (b) What is hardware multithreading? Explain the different approaches to hardware multithreading.(8 marks) 8 (c) Explain:
i) SISD
ii) MIMD
iii) SIMD
iv) SPMD(4 marks)