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First-Term Examination

Sixth Semester [B.Tech] - February 2006

Paper Code : ETEC – 302 Subject : Microprocessor Systems - II

Time : 11/2 Hours

Maximum Marks : 30

Note : Attempt any 3 questions in all. Q1 is compulsory. Each question carries 10 marks. Assume the microprocessor to be 8086/8088 unless specified otherwise. Make suitable assumptions where necessary.

Q1

( a )

 

10

( b )

   
( c )    
( d )    
( e )    

Q1

( a )

Distinguish between the following instructions:

  1. SHR (Shift Logical Right) and SAR (Shift Arithmetic Right)
  2. DIV and IDIV
  3. TEST and CMP

6

( b )

Explain the functions of the following instructions:

1) MOVS  2) LODS  3) AAS  4) AAM

4

Q2

( a )

Discuss the meaning of pins whose definition depends on the state of MN/MX pin when MN/MX=1.

8

( b )

Explain the difference between effective address and physical address. How is physical address calculated? 2

Q3

( a )

Give the machine codes for the following instructions:
  1. MOV CX, 0550H  ; most significant four bits of the Op-code are 1011
  2. MOV BL, [0550]   ; most significant six bits of the Op-code are 100010
  3. MOV DL, [BX]     ; most significant four bits of the Op-code are 1011
  4. MOV DX, [BX]     ; most significant four bits of the Op-code are 1011
  5. MOV RESULTS [BP], AX  ; most significant four bits of the Op-code are 1011

5

( b )

Write a program in assembly language for performing Bubble Sort. 5

Q5

Write short notes on :

10

( a )

Intel 80486

3

( b )

Assembler directices

( c )

 

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