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.
