MU Electronics Engineering (Semester 6)
Computer Organization
May 2012
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Consider a cache (M1) and memory (M2) hierarchy with the following characteristics:
M1: 16k words, 50ns access time
M2: 1m words, 400ns access time
Assume 8 words cache blocks and set size of 256 words with the set associative mapping
(i) Show the mapping between M1 and M2
(ii) Calculate the effective access time with a cache hit ratio of h=0.95
10 M
1 (b) What do you mean by fetch cycle, instruction cycle, machine cycle and interrupt acknowledgement cycle? Explain in brief.
10 M

2 (b) What is micro operation? Give some examples of four types of micro - operations.
10 M
2 (a) Multiply (-7) and (3) by using Booths multiplication.Give the flow table of multiplication.
10 M

3 (a) What do you mean by initialization of DMA controller? How DMA controller works? Explain with suitable block diagram.
10 M
3 (b) What is virtual memory? Explain how the virtual address is mapped into the physical address?
10 M

4 (a) Explain with example, how effective address is calculated in different types of addressing modes.
10 M
4 (b) Formulate a four segment instruction pipeline for a computer.Specify the operation to be performed in each segment.
10 M

5 (a) Explain any two methods of hard wired control unit.
10 M
5 (b) Explain the Von Neumann architecture with the help of diagram.
10 M

6 (a) With the neat flow chart, explain the procedure for the division of the floating point numbers carried out in a computer.
10 M
6 (b) Explain the Flynns classification of the parallel processing.
10 M

Write short notes on (any four)
7 (a) PCI bus architecture
5 M
7 (b) Systolic arrays
5 M
7 (c) Compare RISC and CISC
5 M
7 (d) IEEE 754 format
5 M
7 (e) Programmed I/O
5 M



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