Code No-NR- 310201

III-B.Tech. I-Semester Supplementary Examinations, June-2003

COMPUTER ORGANIZATION
Set No. 1
(common to EEE, ECE, EIE and ET)

Time: 3 Hours
Max. Marks: 80

Answer any FIVE questions

All questions carry equal marks

1. (a) Explain the architecture of I A S computer and explain each block.

(b) What are various ways of representing negative numbers?

2. Describe the different types of operands and operations that are found in a digits machine.

3. (a) Explain the sequence of micro operations involved in an instruction cycle using a flow chart.

(b) What is an executive cycle? Give the sequence of operations involved in SKIP and increment instructions.

4. Clearly explain the following terms:

(a) Microprogram (b) Microinstruction
(c) Microprogramming (d) Microprogramming language.

5.(a) What are associative memories needed?

(b) What are the uses of magnetic tapes?

(c) What are the operations performed to manage memory?

6. (a) What are the advantages and disadvantages of keeping page tables in the main memory?

(b) What are the disadvantages of paging technique?

(c) Briefly explain about multilevel page tables.

7. (a) What is the difference between memory mapped I/O and isolated I/O ?What are the advantages and disadvantages of each?

(b) What are the basic advantages of using interrupts-initiated data transfer over transfer program control without an interrupt?

8. (a) Differentiate between programmed I/O and memory mapped I/O.

(b) Compare interrupt I/O control with DMA I/O control. Why does DMA have priority over CPU when both request a memory transfer?