OR

Code No.311253 III-B.Tech. I-Semester Supplementary Examinations, June 2003

.in

COMPUTER ARCHITECTURE (Computer Science and Information Technology) Time: 3 Hours Max. Marks: 70 Answer any FIVE questions All questions carry equal marks. --1.a) Describe briefly about stack organization and its operations. b) Explain atleast six types of addressing modes with examples. Write the sequence of micro instructions for the fetch cycle. Explain the architectural features of 8085 microprocessor.

3.a)

What is the difference between hardwired control and micro program control? What are the advantages and disadvantages of each method? Draw and explain the block diagram of a typical micro program sequences.

b)

or ld

2.a) b)

Explain direct mapping method of organizing the cache memory. Derive the match logic for one word of associative memory and draw the logic diagram.

5.a) b)

Compare I/O mapped I/O and memory mapped I/O. Draw the block diagram of a computer with an I/O processor (IOP). Explain how CPU and IOP communicate with each other.

6.a)

What are the advantages of 2’s complement representation over one’s complement representation of numbers. What is meant by the ‘locality of reference? How does it help in faster execution of the programs? Draw the block diagram of a bus system connected to four registers with information transferred serially from any register to any other register.

b)

nt

c)

uW

4.a) b)

Explain the types of data transfer using handshaking. Explain Fetch cycle, Indirect cycle and BSA. What is the difference between the BSA instruction and the interrupt cycle?

8.

Write short notes on any two: a) RISC and CISC Processors. b) Priority interrupt. c) Instruction formats.

Aj

7.a) b) c)

@@@@@