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8086 Micro Controllers Important Questions


8086 Micro Controllers Important Questions

1)      Explain the need of segmentation
2)      List the internal registers in 8086 Microprocessor
3)      Explain the roles of BIU and EU
4)      What are the advantages of pipelining
5)      List the signals in minimum and maximum modes
6)      Explain the roles of pins TEST, LOCK
7)      Which are the pins of 8086 that are to be connected to interface 8284 and explain their functions
8)      Which are the pins of 8086 that are to be connected to 8087 and explain their Functions?
9)      List the signals in minimum and maximum modes
10)  Explain the roles of pins TEST, LOCK
11)  Which are the pins of 8086 that are to be connected to interface 8284 and explain their functions
12)  Which are the pins of 8086 that are to be connected to 8087 and explain their Functions
13)What do you mean by multi tasking?
14)What is a pipe lined architecture?
15)  What is the use of instruction queue and what is its size?
16)  What are the two modes of operation in 8086 and how they are selected?
17)  List the logical operations possible using 8086.
18)  What are the segments available in 8086 CPU?
19)  What is the function of a instruction pointer in 8086?
20)  How clock signal is generated in 8086? What is the maximum internal clock frequency of 8086?
21)  If the execution unit generates an effective address of 43A2H and the DS register contains 4000H, what will be the physical address generated by the BIU?
22)  If AL = -9 and BL = 4710 after IDIV BL what are the values of AL and AH.
23)  IF AX = -20010 and CX = 670H after IMUL CX what are the values of AX and DX
24)  Explain AAA, AAD, AAM, AAS instructions with examples.
25)  Explain DAA, DAS instructions with examples.
26)  Explain the instructions related to the fixed and variable ports.
27)  Explain the instructions related to arithmetic and logical shift.
28)  How REP instruction is used along with string instructions.
29)  Explain different types of CALL instructions
30)  Define Register Relative Addressing Mode.
31)  Define Relative based indexed addressing mode:
32)  List the branch related addressing mode
33)  List the functions of Bus Interface Unit in 8086
34)  Write any two advantages of segment registers in 8086
35)  What is the use of Instruction pointer in 8086?
36)  Write about the auxiliary carry flag used in 8086?
37)  When the Overflow flag is set?
38)  Define Register addressing mode:
39)  Define Register Indirect Addressing mode
40)  Define Register relative addressing mode
41)  Define Based Indexed addressing mode
42)  Define Intra segment direct addressing mode
43)  Define Intra segment Indirect addressing mode
44)  Define Inter segment addressing mode:
45)  Define Inter segment Indirect addressing mode:
46)  What is the use of PUSHF instruction used in 8086
47)  Define XLAT instruction used in 8086.
48)  What is the use of ‘W’ bit in opcode ?.
49)  What is DAS instruction?
50)  What is Packed BCD Format?
51)  What is the value of ‘AX’ after executing following instructions.
MOV AH,00
MOV  AL,’7’
ADD AL,’3’
AAA
52)  What is difference between DIV and IDIV instruction in 8086 ?
53)  Write about the following instruction :  MOV CS:[BX], DL
54)  What is Programmed I/O ?
55)  What is the use of Directives in 8086 ?
56)  What is AAS instruction in 8086 ?
57)  What is Unpacked BCD Format ?
58)  What is the value of AL after executing the following instructions.
MOV AL,35H
ADD AL,49H
DAA
59)  Define Segment Override Prefix.
60)  Write the difference between CBW and CWD instruction in 8086.
61)  Write about the following instruction : LES CX, [3483H]
62)  Define EQU directive in 8086 assembly language?
63)  Write the use of Assume directive in 8086 assembly language using one example?
64)  Define EXTRN directive in 8086 assembly language?
65)  What is the use of TEST instruction in 8086?
66)  Define LAHF and SAHF instructions in 8086.
67)  While handling the interrupt instructions in 8086, what are the internal operations may be carried out by the stack?
68)  Write about EVEN directive in 8086 ALP.
69)  Write about the following instruction :
            Call WORD PTR [BX]
70)  When the 8086 processor is in minimum mode?
71)  When the 8086 processor is in maximum mode?
72)  Write any three differences between 8086 and 8088?
73)  Define Instruction cycle?
74)  What is polling?
75)  How physical address is computed in 8086?
76)  What are the segments available in 8086 CPU?
77)  How does the 8086 processor access a word at an odd address?
78)  What are the features of 8086 programmed I/O?
79)  What do you mean by pipelining in an 8086 processor?
80)  What is the purpose of CLK signal in 8086 CPU?
81)  What is the function of instruction pointer in 8086?
PART B QUESTIONS
1)      Explain the need of segmentation.
2)      List the internal registers in 8086 Microprocessor
3)      Explain the roles of BIU and EU.
4)      Explain all the flags in 8086.
5)      Sketch and explain the interface of 32K x 16 ROMs using a decoder in minimum mode.
6)      Sketch and explain the interface of 8K x 16 RAMs using a decoder in minimum mode.
7)      Sketch and explain the 8086 bus activities during read machine cycle
8)      Draw a neat block diagram of the architecture of an 8086 microprocessor and explain the different functional units available in detail.
9)      Explain the addressing modes of 8086with examples.
10)  How the instruction set of 8086 are been classified. Explain them with examples.
11)  Explain the maximum mode of operation of 8086 microprocessor.
12)  Explain the addressing modes of 8086with examples.
13)  Draw a neat block diagram of the architecture of an 8086 microprocessor and explain the different flag registers available in 8086.
14)  Explain the architecture of an 8086 processor with a neat sketch and give the significance of various ‘O’, ’T’,’I’ and ‘D’ flags of 8086.
15)  What are the data related addressing modes in 8086 and explain each with a neat diagram.          
16)  Show the ODD and EVEN bank arrangement of memory in 8086.
17)  Explain the interrupt structure of 8086.
18)  Explain the minimum mode of operation in 8086.

8086 Micro Controllers Important Questions


8086 Micro Controllers Important Questions

1)      Explain the need of segmentation
2)      List the internal registers in 8086 Microprocessor
3)      Explain the roles of BIU and EU
4)      What are the advantages of pipelining
5)      List the signals in minimum and maximum modes
6)      Explain the roles of pins TEST, LOCK
7)      Which are the pins of 8086 that are to be connected to interface 8284 and explain their functions
8)      Which are the pins of 8086 that are to be connected to 8087 and explain their Functions?
9)      List the signals in minimum and maximum modes
10)  Explain the roles of pins TEST, LOCK
11)  Which are the pins of 8086 that are to be connected to interface 8284 and explain their functions
12)  Which are the pins of 8086 that are to be connected to 8087 and explain their Functions
13)What do you mean by multi tasking?
14)What is a pipe lined architecture?
15)  What is the use of instruction queue and what is its size?
16)  What are the two modes of operation in 8086 and how they are selected?
17)  List the logical operations possible using 8086.
18)  What are the segments available in 8086 CPU?
19)  What is the function of a instruction pointer in 8086?
20)  How clock signal is generated in 8086? What is the maximum internal clock frequency of 8086?
21)  If the execution unit generates an effective address of 43A2H and the DS register contains 4000H, what will be the physical address generated by the BIU?
22)  If AL = -9 and BL = 4710 after IDIV BL what are the values of AL and AH.
23)  IF AX = -20010 and CX = 670H after IMUL CX what are the values of AX and DX
24)  Explain AAA, AAD, AAM, AAS instructions with examples.
25)  Explain DAA, DAS instructions with examples.
26)  Explain the instructions related to the fixed and variable ports.
27)  Explain the instructions related to arithmetic and logical shift.
28)  How REP instruction is used along with string instructions.
29)  Explain different types of CALL instructions
30)  Define Register Relative Addressing Mode.
31)  Define Relative based indexed addressing mode:
32)  List the branch related addressing mode
33)  List the functions of Bus Interface Unit in 8086
34)  Write any two advantages of segment registers in 8086
35)  What is the use of Instruction pointer in 8086?
36)  Write about the auxiliary carry flag used in 8086?
37)  When the Overflow flag is set?
38)  Define Register addressing mode:
39)  Define Register Indirect Addressing mode
40)  Define Register relative addressing mode
41)  Define Based Indexed addressing mode
42)  Define Intra segment direct addressing mode
43)  Define Intra segment Indirect addressing mode
44)  Define Inter segment addressing mode:
45)  Define Inter segment Indirect addressing mode:
46)  What is the use of PUSHF instruction used in 8086
47)  Define XLAT instruction used in 8086.
48)  What is the use of ‘W’ bit in opcode ?.
49)  What is DAS instruction?
50)  What is Packed BCD Format?
51)  What is the value of ‘AX’ after executing following instructions.
MOV AH,00
MOV  AL,’7’
ADD AL,’3’
AAA
52)  What is difference between DIV and IDIV instruction in 8086 ?
53)  Write about the following instruction :  MOV CS:[BX], DL
54)  What is Programmed I/O ?
55)  What is the use of Directives in 8086 ?
56)  What is AAS instruction in 8086 ?
57)  What is Unpacked BCD Format ?
58)  What is the value of AL after executing the following instructions.
MOV AL,35H
ADD AL,49H
DAA
59)  Define Segment Override Prefix.
60)  Write the difference between CBW and CWD instruction in 8086.
61)  Write about the following instruction : LES CX, [3483H]
62)  Define EQU directive in 8086 assembly language?
63)  Write the use of Assume directive in 8086 assembly language using one example?
64)  Define EXTRN directive in 8086 assembly language?
65)  What is the use of TEST instruction in 8086?
66)  Define LAHF and SAHF instructions in 8086.
67)  While handling the interrupt instructions in 8086, what are the internal operations may be carried out by the stack?
68)  Write about EVEN directive in 8086 ALP.
69)  Write about the following instruction :
            Call WORD PTR [BX]
70)  When the 8086 processor is in minimum mode?
71)  When the 8086 processor is in maximum mode?
72)  Write any three differences between 8086 and 8088?
73)  Define Instruction cycle?
74)  What is polling?
75)  How physical address is computed in 8086?
76)  What are the segments available in 8086 CPU?
77)  How does the 8086 processor access a word at an odd address?
78)  What are the features of 8086 programmed I/O?
79)  What do you mean by pipelining in an 8086 processor?
80)  What is the purpose of CLK signal in 8086 CPU?
81)  What is the function of instruction pointer in 8086?
PART B QUESTIONS
1)      Explain the need of segmentation.
2)      List the internal registers in 8086 Microprocessor
3)      Explain the roles of BIU and EU.
4)      Explain all the flags in 8086.
5)      Sketch and explain the interface of 32K x 16 ROMs using a decoder in minimum mode.
6)      Sketch and explain the interface of 8K x 16 RAMs using a decoder in minimum mode.
7)      Sketch and explain the 8086 bus activities during read machine cycle
8)      Draw a neat block diagram of the architecture of an 8086 microprocessor and explain the different functional units available in detail.
9)      Explain the addressing modes of 8086with examples.
10)  How the instruction set of 8086 are been classified. Explain them with examples.
11)  Explain the maximum mode of operation of 8086 microprocessor.
12)  Explain the addressing modes of 8086with examples.
13)  Draw a neat block diagram of the architecture of an 8086 microprocessor and explain the different flag registers available in 8086.
14)  Explain the architecture of an 8086 processor with a neat sketch and give the significance of various ‘O’, ’T’,’I’ and ‘D’ flags of 8086.
15)  What are the data related addressing modes in 8086 and explain each with a neat diagram.          
16)  Show the ODD and EVEN bank arrangement of memory in 8086.
17)  Explain the interrupt structure of 8086.
18)  Explain the minimum mode of operation in 8086.

Microprocessors And Micro Controllers Important 2 Marks Questions


Microprocessors And Micro Controllers Important 2 Marks Questions

1)      Differentiate between a microprocessor and a micro controller
2)      Differentiate between a microprocessor and digital signal processor
3)      List the internal registers in 8085 microprocessor and their abbreviations and lengths.
4)      Describe the primary function of each register.
5)      List five levels of interrupts in 8085 microprocessor with priority.
6)      Interface a key to SID pin of 8085 Microprocessor.
7)      Interface a LED to SOD pin of 8085 Microprocessor.
8)      In 8085 microprocessor which has higher the priority NMI or DMA
9)      What are the differences between Memory mapped I/O and I/O mapped I/O
10)  What are the various registers in 8085?
11)  In 8085 name the 16 bit registers?
12)  What are the various flags used in 8085?
13)  What is Stack Pointer?
14)  What is Program counter?
15)  Which Stack is used in 8085?
16)  What happens when HLT instruction is executed in processor?
17)  What is meant by a bus?
18)  What is Tri-state logic?
19)  Give an example of one address microprocessor?
20)  In what way interrupts are classified in 8085?
21)  What is Hardware interrupts?
22)  What is Software interrupts?
23)  Which interrupt has the highest priority?
24)  Name 5 different addressing modes?
25)  How many interrupts are there in 8085?
26)  What is clock frequency for 8085
27)  What is the RST for the TRAP?
28)  In 8085 which is called as High order / Low order Register?.
29)  What are input & output devices?
30)  Can an RC circuit be used as clock source for 8085?
31)  Why crystal is a preferred clock source?
32)  Which interrupt is not level-sensitive in 8085?
33)  What does Quality factor mean?
34)  What are level-triggering interrupt?
35)  Write an algorithm to convert BCD to Binary numbers. Write 8085 assembly program to convert two digit BCD number to hexadecimal number
36)  Write an algorithm to convert Binary number to BCD number. Write 8085assembly program to convert one byte Binary number to BCD.
37)  Write an algorithm to evaluate a factorial of an integer number N. Write an assembly program using recursive procedure.
38)  Write an algorithm to find GCD of two numbers. Write an assembly program to find GCD of two words.
39)  Write an algorithm and assembly program to sort the numbers in an array in descending order using bubble sort method
40)  Sketch and explain the interface of 32K x 16 ROMs using a decoder in for 8085

8085 Microprocessors Important Questions


  8085 microprocessors

1)      Differentiate between a microprocessor and a micro controller
2)      Differentiate between a microprocessor and digital signal processor
3)      List the internal registers in 8085 microprocessor and their abbreviations and lengths.
4)      Describe the primary function of each register.
5)      List five levels of interrupts in 8085 microprocessor with priority.
6)      Interface a key to SID pin of 8085 Microprocessor.
7)      Interface a LED to SOD pin of 8085 Microprocessor.
8)      In 8085 microprocessor which has higher the priority NMI or DMA
9)      What are the differences between Memory mapped I/O and I/O mapped I/O
10)  What are the various registers in 8085?
11)  In 8085 name the 16 bit registers?
12)  What are the various flags used in 8085?
13)  What is Stack Pointer?
14)  What is Program counter?
15)  Which Stack is used in 8085?
16)  What happens when HLT instruction is executed in processor?
17)  What is meant by a bus?
18)  What is Tri-state logic?
19)  Give an example of one address microprocessor?
20)  In what way interrupts are classified in 8085?
21)  What is Hardware interrupts?
22)  What is Software interrupts?
23)  Which interrupt has the highest priority?
24)  Name 5 different addressing modes?
25)  How many interrupts are there in 8085?
26)  What is clock frequency for 8085
27)  What is the RST for the TRAP?
28)  In 8085 which is called as High order / Low order Register?.
29)  What are input & output devices?
30)  Can an RC circuit be used as clock source for 8085?
31)  Why crystal is a preferred clock source?  
32)  Which interrupt is not level-sensitive in 8085?
33)  What does Quality factor mean?  
34)  What are level-triggering interrupt?
35)  Draw and specify the complete bit configuration of 8085 flag Register?
36)  Write about RST pins in 8085?
37)  List the control and status signals available in 8085.
38)  What are the limitations of 8085 MPU?
39)  Define Immediate Addressing.
40)  Define Direct Addressing mode
41)   List five levels of interrupts in 8085 microprocessor with priority.
42)  What are the differences between Memory mapped I/O and I/O mapped I/O
43)  Give the significance of SIM and RIM instruction available in 8085.
44)  What is the maximum number of H/W interrupts that can be connected through INTR pin in 8085?
45)  What are the various16 bits registers in 8085?
46)  When the READY signal of 8085 processor is sampled by the processor?
47)  List out all the hardware and software interrupts of 8085.
48)  What is the function of XTHL mnemonic?
49)  Give the significance of SIM and RIM instruction available in 8085.
50)  What is the RST for the TRAP?
51)  What is the function of RPE instruction in 8085?

PART B QUESTIONS
1)      Draw and explain Bus architecture of 8085
2)      Briefly explain I/O devices used in 8085.
3)      Draw a flowchart and 8085 ALP for adding the two hexadecimal numbers in any of the registers. If the sum is greater the FFH, display 01H at output PORT0; otherwise display the sum
4)      Draw the timing diagram for IN, OUT and CALL instructions.
5)      Write an ALP for the given expression: (X+Y)*(X-Y)
6)      Write a delay subroutine to produce a delay of 0.5 seconds whose internal clock frequency is 3MHz.
7)      Explain the operations of the given mnemonics:
a)      RRC
b)      CPM M
c)      STC
d)     DAA
8)      Write an assembly language program to add an array of numbers stored from 8000 to 8000+N. The first element of the array gives the count value store the result in 8100 and 8101.

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