Shivaji University 2007 B.E Computer Science MicroProcessor-1 - university paper

S-502
SECOND YEAR OF COMPUTER SCIENCE AND ENGINEERING (PART-2) EXAMINATION, 2007
SHIVAJI UNIVERSITY, KOLHAPUR
MICROPROCESSOR-1

Day and Date: Tuesday, 22-05-2007 Total Marks: 100
Time: 10.00a.m. To 1.00p.m.

Instructions: 1) Q.1 from section-1 and Q.5 from section-2 are compulsory.

2) Solve any 2 ques. from Q.2, Q.3, and Q.4

3) Solve any 2 ques. from Q.6, Q.7, and Q.8

SECTION-1

Q.1 Solve the subsequent (any four)[Marks 20=4*5]

1)Demultiplexing of address and data bus.

2)Flag register

3)Explain the subsequent instructions and specify their addressing modes

a) XCHG

b) STAXB

4)Delay routing using registers pair.

5)Opcode fetch with wait state


Q.2 a) discuss subsequent pins: [Marks 8]

1) X1, X2

2) ALE

3) IO/M

4) INTR

b) discuss with example the addressing modes for 8085.[Marks 7]



Q.3 a) Write an assembly language programme for 8085 to obtain the smallest number out of ten numbers stored in location 60000H onwards.[Marks 8]

b) Draw interfacing diagram for 4*4 keyboard matrix to 8085.[Marks 7]

Q.4 a) Draw the timing diagram for OUT instruction.[Marks 7]

b) discuss with block diagram the decoding and execution of instruction after it has been fetched. [Marks 8]



SECTION-2


Q.5 discuss the subsequent (any four)[Marks 20=4*5]

1) RIM instruction format.

2) Control word format for8253.

3) Mode-1 for 8253.

4) Weighted register DAC.

5) Status registers for 8251.



Q.6 a) discuss the interrupt structure of 8085.[Marks 8]

b) Draw and discuss block diagram of 8255.[Marks 7]



Q.7 a) discuss the sequence of operations for DMA transfer using HOLD and HALD signal.[Marks 7]

b) discuss the subsequent command word formats for 8279.[Marks 8]

1) Clear mode

2) Keyboard/display mode



Q.8 a) Draw and discuss the block diagram for 8251.[Marks 8]

b) Draw the interfacing for ADC 0809 WITH 8085.[Marks 7]

Earning:   Approval pending.