8085 assembly language programming

8085 ASSEMBLY LANGUAGE PROGRAMMING

1) PROGRAM TO EXCHANGE TWO 16 BIT NUMBERS

Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1

2

3

4

5

6

7

8000

8003

8004

8007

800A

800B

800E

2A,00,F0

EB

2A,00,F1

22,00,F0

EB

22,00,F1

CF

LHLD F000

XCHG

LHLD F100

SHLD F000

XCHG

SHLD F200

RST 1

Load memory from specified locations. Exchange contents of HL & DE pairs. Load memory from specified locations. Store memory to specified locations. Exchange contents of HL & DE pairs. Store memory to specified locations. Restart

INPUT (Before execution) F001 ; F000 F101 ; F10012 ; AB 3C ; DE

OUTPUT(After execution)

F001 ; F000 F101 ; F1003C ; DE 12 ; AB

K. ADISESHA, Presidency college

1


2) PROGRAM TO ADD OR SUBTRACT TWO 8 BIT NUMBERS

INPUT : XX, YY


2

3

4

5

6

7

8

9

10

8000

8002

8004

8005

8008

800B

800D

8010

8012

8015

3E, XX

06, YY

80/(90)

32,00,F0

D2,10,80

3E,01

C3,12,80

3E,00

32,01,F0

CF

Ahead 1

Ahead 2

MVI A, XX

MVI B, YY

ADD B/SUB B

STA F000

JNC (Ahead 1)

MVIA, 01 JMP(Ahead 2)

MVIA, 00

STA F001

RST1

Move immediately to [A] the data XX

Move immediately to [B] the data YY

Add(or subtract) [B] with [A]

Store contents of [A] in specified location

Jump on no carry to specified location

Move immediately to [A] the data(01)H

Jump unconditionally ahead


Store contents of [A] in specified location Restart

1) 2B, 1A 2) 2B, FA OUTPUT

TRIAL Addition (XX+YY) Subtraction (XX-YY) ADDRESS F001: F000 F001: F000

1 2

00 : 45 01 : 25

00 : 25 01 : 31


2


3) PROGRAM TO ADD TWO 16 BIT NUMBERS


2

3

4

5

6

7

8

9

10

8000

8001

8004

8005

8008

8009

800C

800F

8010

8013

AF

2A, 00, F0

EB

2A,00,F1

19

22,00,F2

D2,10,80

3C

32,02,F2

CF

Ahead

XRA A

LHLD F000

XCHG

LHLD F100

DAD D

SHLD F200

JNC (Ahead)

INR A

STA F202

RST1

Clear accumulator and Flag

Load memory from specified locations

Exchange contents of HL & DE pairs


Add HL & DE pairs

Store memory to specified locations

Jump on no carry to ahead address

Increment contents of accumulator by one

Store contents of [A] in specified location Restart

F001: F000 (X) 4A : 2C F101: F100 (Y) ED : 5B F202:F201: F200 (X+Y) 01 : 37 : 87


3


4) PROGRAM TO SUBTRACT TWO 16 BIT NUMBERS (X>Y)


2

3

4

5

6

7

8

9

10

8000

8003

8004

8007

8008

8009

800C

800D

800E

8011

2A,00,F0

EB

2A,00,F1

7D

93

32,00,F2

7C

9A

32,01,F2

CF

LHLD F000

XCHG

LHLD F100

MOV A, L

SUB E

STA F200

MOV A, H

SBB D

STA F201

RST 1


Exchange contents of HL & DE pairs


Move contents of [L] to [A]

Subtract [E] from [A]

Store result in specified location

Move contents of [H] to [A]

Subtract [D] from [A] with borrow

Store result in specified location

Restart

F001: F000 (X) FA : 2C F101: F100 (Y) BD : 5B F202:F201: F200 (X-Y) 3C : D1


4


5) PROGRAM TO ADD TWO N BYTE NUMBERS

Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9

10

11

12

13

14

15

16

17

18

19

20

21

8000

8003

8006

8009

800B

800E

800F

8010

8011

8012

8013

8014

8015

8018

8019

801C

801F

8021

8024

8026

8027

21,00,F0

01,00,F1

11,00,F2

3E,(NN)

32,00,81

AF

0A

8E

12

23

03

13

3A,00,81

3D

C2,0B,80

D2,24,80

3E,01

C3,26,80

3E,00

12

CF

LOOP

Ahead 1

Ahead 2

LXIH F000

LXIB F100

LXID F200

MVI A, (NN)

STA 8100

XRA A

LDAX B

ADC M

STAX D

INX H

INX B

INX D

LDA 8100

DCR A

JNZ (LOOP)

JNC (Ahead 1)

MVI A, 01

JMP (Ahead 2)

MVI A, 00

STAX D

RST 1

Load HL pair with specified data

Load BC pair with specified data

Load DE pair with specified data

Specify the number of bytes

Save the count

Clear accumulator and flags

Load [A] indirectly from address specified by BC pair

Add memory to [A] with carry

Store contents of [A] indirectly in location specified by DE pair

Update memory

Update BC register pair

Update DE register pair

Load [A] from specified location

Decrement count

Jump on no zero to perform loop



Jump unconditionally to ahead address

Move immediately to [A] the

data(00)HStore contents of [A] indirectly in address specified by DE pair

Restart


5


INPUT(X) F103 : F102 : F101 : F100 A4 : E6 : F3 : D7 INPUT(Y) F003 : F002 : F001 : F000 C3 : 54 : A2 : 1B OUTPUT(X+Y) F204:F203 : F202 : F201 : F200 01: 68 : 3B: 95: F2

6) PROGRAM FOR BLOCK TRANSFER


2

3

4

5

6

7

8

9

10

8000

8002

8005

8008

8009

800A

800B

800C

800D

8010

16,10

21,00,81

01,00,82

7E

02

23

03

15

C2,08,80

CF

LOOP

MVI D, (10)H

LXIH 8100

LXIB 8200

MOV A,M

STAX B

INX H

INX B

DCR D

JNZ (LOOP)

RST1

Set count in [D]

Load HL pair with specified address

Load BC pair with specified address

Move contents of memory to [A] Store contents of [A] indirectly to location specified by BC pair

Update memory

Update BC pair

Decrement count in [D]

Jump on no zero to perform the loop

Restart

INPUT

8100:810:8102:8103:8104:8105:8106:8107:8108:8109:810A:810B:810C:810D:810E:810F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F

OUTPUT

8200:8201:8202:8203:8204:8205:8206:8207:8208:8209:820A:820B:820C:820D:820E:820F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F


6


7) PROGRAM TO BLOCK TRANSFER IN REVERSE ORDER


2

3

4

5

6

7

8

9

10

8000

8002

8005

8008

8009

800A

800B

800C

800D

8010

16,10

21,00,81

01,0F,82

7E

02

23

0B

15

C2,08,80

CF

LOOP

MVI D, (10)H

LXIH 8100

LXIB 820F

MOV A,M

STAX B

INX H

DCX B

DCR D

JNZ (LOOP)

RST1

Set count in [D]


Load BC pair with specified address

Move contents of memory to [A] Store contents of [A] indirectly to location specified by BC pair

Update memory

Decrement BC pair by one

Decrement count in [D]


Restart

INPUT

8100:810:8102:8103:8104:8105:8106:8107:8108:8109:810A:810B:810C:810D:810E:810F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F

OUTPUT

820F:820E:820D:820C:820B:820A:8209:8208:8207:8206:8205:8204:8203:8202:8201:8200 0F : 0E : 0D : 0C : 0B : 0A : 09 : 08 : 07 : 06 : 05 : 04 : 03 : 02 : 01 : 00


7


8) PROGRAM TO ADD N DECIMAL NUMBERS (N= 10)

Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

8000

8001

8003

8005

8008

8009

800A

800D

800E

800F

8010

8013

8014

8015

8018

AF

0E,0A

16,00

21,00,81

86

27

D2,0E,80

14

23

0D

C2,08,80

6F

62

22,00,F2

CF

LOOP

Ahead

XRA A

MVI C, (0A)H

MVI D , 00

LXIH 8100

ADD M

DAA

JNC(Ahead)

INR D

INX H

DCR C

JNZ(LOOP)

MOV L,A

MOV H,D

SHLD F200

RST 1


Set N count in [C]

Clear [D]


Add memory to [A]

Decimal adjust accumulator

Jump on no carry to ahead

address Increment [D] by one

Update memory

Decrement count


Move [A] to [L]

Move [D] to [H]

Store contents of HL pair to

specified consecutive locations Restart

INPUT OUTPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109 F201 F200 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 00 45


8


9) PROGRAM FOR ADDITION OF HEXA-DECIMAL NUMBERS UNTILL ‘FF’ IS ENCOUNTERED


2

3

4

5

6

7

8

9

10

8000

8001

8004

8005

8008

800B

800E

800F

8010

8013

AF

32,F9,FF

F5

CD,D3,06

11,FF,FF

CD,BE,04

F1

3C

C2,01,80

76

LOOP

XRA A

STA FFF9

PUSH PSW

CALL(UPDDT)

LXID FFFF

CALL(DELAY)

POP PSW

INR A

JNZ (LOOP)

HLT


Store contents of accumulator in specified location

Push [A] and flags to stack

Call display subroutine for data field

Implement a delay of 0.5 s using

monitor delay subroutine

Pop[A] and flags off stack

Increment contents of [A] by one

Perform the loop until [A] becomes zero

Halt

OUTPUT: ‘00’ up to ‘FF’ is displayed in data field.


9


10) PROGRAM FOR FOUR DIGIT BCD ADDITION


10

Sl no.

ADDRESS HEX CODE LABEL MNEMONICS COMMENTS

1 2 3 4 5 6 7 8 9

10

11

12

13

14

15

16

17

18

19

20

21

8000

8003

8006

8009

800B

800E

800F

8010

8011

8012

8013

8014

8015

8018

8019

801C

801F

8021

8024

8026

8027

21,00,F0

01,00,F1

11,00,F2

3E,02

32,00,81

0A

8E

27

12

23

03

13

3A,00,81

3D

C2,0B,80

D2,24,80

3E,01

C3,26,80

3E,00

12

CF

LOOP

Ahead 1

Ahead 2

LXIH F000

LXIB F100

LXID F200

MVI A, (02)

STA 8100

LDAX B

ADC M

DAA

STAX D

INX H

INX B

INX D

LDA 8100

DCR A

JNZ (LOOP)

JNC (Ahead 1)

MVI A, 01

JMP (Ahead 2)

MVI A, 00

STAX D

RST 1




Specify the number of bytes

Save the count

Load [A] indirectly from address specified by BC pair

Add memory to [A] with carry


Store contents of [A] indirectly in location specified by DE pair

Update memory

Update BC register pair


Load [A] from specified location

Decrement count


Jump on no carry to ahead address Move immediately to [A] the data(01)HJump unconditionally to ahead address Move immediately to [A] the data(00)H

Store contents of [A] indirectly in address specified by DE pair

Restart


INPUT(X) F101 : F100 57 : 93 INPUT(Y) F001 : F000 64 : 21 OUTPUT(X+Y) F202 : F201 : F200 01: 22 : 14


11


11) PROGRAM TO FIND 2`S COMPLEMENT OF 8 BIT/ 16 BIT

NUMBER

Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

8000

8002

8005

8008

8009

800A

800B

800C

800F

8010

8013

8016

8017

801A

06,01/(02)

11,01,00

21,00,F0

7E

2F

77

05

CA, 13,80

23

C3,08,80

2A,00,F0

19

22,00,F1

CF

LOOP

Ahead

MVI B,01/(02)

LXID 0001

LXIH F000

MOV A,M

CMA

MOV M,A

DCR B

JZ (Ahead)

INX H

JMP(Loop)

LHLD F000

DAD D

SHLD F100

RST 1

Move to [B] (01) for 8-bit & (02) for 16-bit complement of data Load DE pair with specified data


Copy contents of memory to [A]

Complement contents of [A]

Copy contents of [A] to memory

Decrement [B] by one

Jump on zero to ahead address

Update memory

Jump unconditionally to perform

loop Load contents of HL pair from

specified locations Add HL and DE pair of registers

Store contents of HL pair to

specified locations Restart

DATA INPUT OUTPUT(2`s complement) 8-Bit F000 : 7A F100 : 87 16-Bit F001 : F000 :: 1A: 26 F101 : F100 :: E5: DA


12


12) PROGRAM FOR SUB TRACTION OF TWO 16-BIT BCD NUMBERS (X>Y)

OUTPUT


2

3

4

5

6

7

8

9

10

8000

8003

8006

8009

800C

800D

800E

800F

8012

8013

11,86,97

01,59,32

CD,20, 80

6F

5A

48

CD,20,80

67

22,00,F0

CF

LXID(9786)

LXIB(3259)

CALL(Sub-BCD)

MOV L,A

MOV E,D

MOV C,B

CALL(Sub-BCD)

MOV H,A

SHLD F000

RST 1



Call subroutine for BCD subtraction

Copy contents of [A] to [L]

Copy contents of [D] to [E]

Copy contents of [B] to [C]

Call subroutine for BCD subtraction

Copy contents of [A] to [H]

Store contents of HL pair to specified locations

Restart 12

13

14

15

16

17

8020

8017

8018

8019

801A

801B

3E,99

93

3C

81

27

C9

Sub-BCD

MVI A,99

SUB E

INR A

ADD C

DAA

RET

Move to [A] the given data to subtract using 99` complement

Subtract [E] from [A]

Increment [A] by 1

Add [C] to [A]


Return from subroutine unconditionally

F001: F000 :: 65 : 27


13


13) PROGRAM FOR BLOCK EXCHANGE


2

3

4

5

6

7

8

9

10

11

12

13

8000

8003

8006

8008

8009

800A

800B

800C

800D

800E

800F

8010

8013

21,00,F0

11,00,F1

0E,10

1A

46

77

78

12

23

13

0D

C2,08,80

CF

LOOP

LXIH F000

LXID F100

MVI C,(10)H

LDAX D

MOV B,M

MOV M,A

MOV A,B

STAX D

INX H

INX D

DCR C

JNZ(Loop)

RST 1



Set counter in [C] for N counts

Load [A] indirectly from address indicated by DE pair

Copy contents of memory to[B]

Copy contents of [A] to memory

Copy contents of [B] to [A]

Store contents of [A] indirectly onto address in DE pair

Update memory


Decrement [C] by 1

Perform the loop until [C] becomes zero

Restart

INPUT F000:F001:F002:F003:F004:F005:F006:F007:F008:F009:F00A:F00B:F00C:F00D:F00E:F00F 00 : 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F F100:F101:F102:F103:F104:F105:F106:F107:F108:F109:F10A:F10B:F10C:F10D:F10E:F10F 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 : 18 : 19 : 1A : 1B : 1C : 1D : 1E : 1F F000:F001:F002:F003:F004:F005:F006:F007:F008:F009:F00A:F00B:F00C:F00D:F00E:F00F 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 : 18 : 19 : 1A : 1B : 1C : 1D : 1E : 1F F100:F101:F102:F103:F104:F105:F106:F107:F108:F109:F10A:F10B:F10C:F10D:F10E:F10F 00 : 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F

OUTPUT


14


14) PROGRAM FOR SORTING AN ARRAY OF ‘N-NUMBERS’ IN ASCENDING ORDER

INPUT

F100:F101:F102:F103:F104:F105:F106:F107:F108:F109 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A

OUTPUT

F100:F101:F102:F103:F104:F105:F106:F107:F108:F109 0A : 01 : 09 : 05 : 03 : 06 : 08 : 07 : 04 : 02


10

11

12

13

14

15

16

17

18

19

8000

8001

8003

8004

8005

8008

8009

800A

800B

800E

800F

8010

8011

8012

8013

8014

8017

8018

801B

AF

06,0B

48

0D

21,00,F1

7E

23

BE

DA,13,80

56

77

2B

72

23

0D

C2,08,80

05

C2,03,80

CF

START LOOP AHEAD

XRA A

MVI B,0B

MOV C,B

DCR C

LXIH F100

MOV A,M

INX H

CMP M

JC (AHEAD)

MOV D,M

MOV M,A

DCX H

MOV M,D

INX H

DCR C

JNZ (LOOP)

DCR B

JNZ (START)

RST 1

Clear accumulator & flags

Move a count (N+1) in [B]

Copy contents of [B] to [C]

Decrement contents of [C] by one Load the specified address in HL pair

Copy contents of [M] to [A]

Update memory

Compare memory with accumulator

Jump on carry to ahead address

Copy contents of [M] to [D]

Copy contents of [A] to [M]

Decrement HL pair by one

Copy contents of [D] to [M]

Increment contents of HL pair by one

Decrement contents of [C] by one


Decrement count in [B] Jump on no zero to specified address

Restart


15


15) PROGRAM TO CHECK 2-OUT-OF-5 CODE


10

11

12

13

14

15

16

17

18

19

8000

8003

8005

8007

8009

800C

800F

8010

8013

8014

80015

8018

8019

801B

801E

8020

8023

8025

8028

3A,00,F0

0E,05

16,00

E6,E0

C2,23,80

3A,00,F0

0F

D2,14,80

14

0D

C2,0F,80

7A

FE,02

C2,23,80

3E,FF

C2,25,80

3E,00

32,00,F1

CF

LOOP AHEAD 2 AHEAD 1 AHEAD 3

LDA F000

MVI C,05

MVI D,00

ANI E0

JNZ (AHEAD 1)

LDA F000

RRC

JNC(AHEAD 2)

INR D

DCR C

JNZ(LOOP)

MOV A,D

CPI ,02

JNZ(AHEAD 1)

MVI A, FF

JMP(AHEAD 3)

MVI A, 00

STA F100

RST 1

Load data into accumulator from specified location

Move a count (05)H in [C]

Clear contents of [D]

Logical AND (E0) H with [A] Jump on no zero to specified address

Load data into accumulator from

specified location Rotate contents of [A] to right


Increment count in [D]

Decrement contents of [C] by one


Copy contents of [D] to [A]

Compare (02) H immediately with [A]

Jump on no zero to specified address

Move ‘FF’ to [A] immediately

Jump to specified location unconditionally

Move ‘00’ to [A] immediately

Store data from accumulator into specified location

Restart

INPUT OUTPUT F000: 11 F100: FF F000: 13 F100: 00


16


16) PROGRAM TO MULTIPLY TWO DIGIT BCD

INPUT OUTPUT F001: F000 F101: F100

11 : 12 01 : 32


10

11

12

13

14

15

16

17

18

19

20

8000

8003

8006

8007

800A

800B

800C

800D

800E

800F

80011

8012

8013

8014

8015

8017

8018

8019

801C

801F

21,00,00

3A,00,F0

47

3A,01,F0

4F

79

85

27

6F

3E,00

8C

27

67

78

C6,99

27

47

C2,0B,80

22,00,F1

CF

START

LXIH (0000 )H

LDA F000

MOV B,A

LDA F001

MOV C,A

MOV A,C

ADD L

DAA

MOV L,A

MVI A,00

ADC H

DAA

MOV H,A

MOV A,B

ADI ,99

DAA

MOV B,A

JNZ(START)

SHLD(F100)

RST 1

Move a count (0000)H in HL pair


Copy contents of [A] to [B]


Copy contents of [A] to [C]

Copy contents of [C] to [A]

Add [L] to accumulator

Decimal adjust [A]

Copy contents of [A] to [L]

Clear contents of [A]

Add contents of [H] to [A]

Decimal adjust [A]

Copy contents of [A] to [H] Copy contents of [B] to [A] Add immediately to accumulator 99 Decimal adjust [A] Copy contents of [A] to [B]

Jump on no zero to specified address Store data from HL pair onto specified

location Restart


17



18

Education

8085 assembly language programming