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8237
(Pages : 2)
Reg. No. : .................................... Name : .........................................
Third Semester B.Tech. Degree Examination, November 2009 (2008 Scheme) 08.306 : COMPUTER ORGANIZATION (RF) Time : 3 Hours
Max. Marks : 100 PART – A
Answer all questions.
(10×4=40 Marks)
1. How is branch instruction sequencing done ? 2. Specify the use of following registers : MAR, MDR, IR, PC. 3. What is meant by addressing modes ? Specify with examples. 4. How is virtual memory implemented ? 5. Explain the I/O interface – SCSI. 6. Explain the sequence of control signals generated for a memory write operation. 7. What is a microprogrammed control unit ? 8. Explain Flash memory. 9. Discuss the use of associative memory. 10. What is the use of Translation Lookaside Buffer in a paging mechanism ? P.T.O.
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8237 PART – B Answer any one question from each Module. Module – I
11. a) Explain in detail the various addressing modes used by the PDP-11 processor.
10
b) What is a subroutine ? What are the steps that occur during a subroutine Call and Ret Instruction ?
10
OR 12. Explain the basic operation sequence of a processor while executing a complete instruction.
20
Module – II 13. a) With a diagram explain the functioning of a hardwired control unit. b) With a diagram explain the input and output gating for one register bit.
10 10
OR 14. a) Explain the control sequence for the execution of the instruction Add (R3), R1.
12
b) Explain the three bus organization of the data path inside a processor.
8
Module – III 15. What is the principle behind cache memory ? Explain the various mapping schemes used for mapping the primary memory to cache memory. 20 OR 16. a) With a diagram, explain how memory interleaving reduces average memory access time. b) What are the various RAID levels ? Explain. ———————
8 12