Mohan Lal Sukhadia University (MLSU) 2001 COMPUTER SYSTEM ARCHITECTURE - Question Paper

Second Year exam of the 3 Year
Degree Course, 2001
(Faculty of Science)
COMPUTER SYSTEM ARCHITECTURE
First Paper
(COMPUTER SCIENCE)
Time : three Hours
[ Maximum Marks :50]
Attempt any 5 questions,
selecting at lowest 1 ques. from every unit,
All ques. carry equal marks.

UNIT - I

1.(a) elaborate the various addressing modes used in 8085
microprocessor? discuss giving examples. 8
(b) elaborate various registers available for programming in 8085
microprocessor. 2

2. discuss the role and significance of subsequent signals in 8085
microprocessor : 10
(i) S1 and S2
(ii) ALE
(iii) IO/`M
(iv) HOLD
(v) NMI

UNIT-II

3- elaborate various arithmetic operations available for 8085
microprocessor? elaborate zero, Auxiliary carry, parity and carry
flags and when they are set?
10

4. Write an assemble language program to transfer 16 bytes of data
from memory location starting from 2020 H to memory location
starting from 3020 H. 10

UNIT-III

5. elaborate the various arithmetic micro-operations? discuss the
operation using examples. 10

6. Compare 32 bit processors of Intel and Motorola. What is a
microprogrammed computer? 10

UNIT-IV

7. What is Cache memory? discuss working of a Cache memory. 10

8.(a) What is Stack? discuss its use and the various operations on
it. 5
(b) discuss working of Random access memory. 5

UNIT-V

9. discuss working of DMA data transfer. Compare it with
programmed I/O and interrupt driven data transfer. 10

10. discuss any 2 of the subsequent : 10
(i) RS 232 C interface.
(ii) Pipe line processor
(iii) IEE 488

Earning:   Approval pending.