Lab 3

Lab 3 : PROGRAMMING BASED ON BRANCH OPERATIONS

OBJECTIVE

To familiar with the use of branch operation related instructions in 8085 programming

PRELAB

Read and understand utilization of the instructions related to branch operations.

OVERVIEW OF BRANCH INSTRUCTIONS

Opcode	Operand	Description
JMP	16-bit	Jump on the 16-bit memory address
JC	16-bit	Jump on Carry
JNC	16-bit	Jump on no Carry
JZ	16-bit	Jump on Zero
JNZ	16-bit	Jump on no Zero
JP	16-bit	Jump on Plus
JM	16-bit	Jump on Minus
JPE	16-bit	Jump on Even Parity
JPO	16-bit	Jump on Odd Parity

EXERCISE

1. Write a program to multiply two 8 bit data stored at location 2101H and 2102H.

ORG 2100H
LXI H, 2101H
MOV A, M
INX H
MOV B, M
MVI C, 00H
MULTIPLY:
    CMP B
    JZ END
    ADD C
    MOV C, A
    DCR B
    JMP MULTIPLY
END:
LXI H, 2103H
MOV M, C
HLT

2. Write a program to add an array of 10 bytes data stored from location 5000H to 5009H and store the result at 500AH and 500BH.

ORG 5000H
DB 01H, 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H, 0AH

ORG 500AH
DB 00H, 00H

ORG 2000H
LXI H, 5000H
MVI C, 00H
MVI D, 00H
MVI B, 0AH

ADD_LOOP:
    MOV A, M
    ADD C
    MOV C, A
    INX H
    DCR B
    JNZ ADD_LOOP

LXI H, 500AH
MOV M, C
MOV A, D
MOV M, A

HLT

3. Write a program to subtract an array of 10 bytes data stored from location 5000H to 5009H and store the result at 500AH and 500BH.

ORG 5000H
DB 10H, 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H, 0AH

ORG 500AH
DB 00H, 00H

ORG 2000H
LXI H, 5000H
MOV A, M
INX H
MVI B, 09H

SUB_LOOP:
    MOV C, M
    SUB C
    INX H
    DCR B
    JNZ SUB_LOOP

LXI H, 500AH
MOV M, A
MOV A, L
MOV M, A

HLT

4. Write a program to find largest and smallest numbers in block of array from 2100H to 2109H. Store the result at location 210AH and 210BH.

ORG 2100H
DB 05H, 03H, 09H, 01H, 07H, 02H, 08H, 06H, 04H, 00H

ORG 210AH
DB 00H

ORG 210BH
DB 00H

ORG 2000H
LXI H, 2100H
MOV A, M
MOV B, A
MOV C, A
INX H
MVI D, 09H

FIND_LOOP:
    MOV A, M
    CMP B
    JG UPDATE_LARGEST
    CMP C
    JL UPDATE_SMALLEST
    INX H
    DCR D
    JNZ FIND_LOOP
    JMP STORE_RESULTS

UPDATE_LARGEST:
    MOV B, A
    JMP FIND_LOOP

UPDATE_SMALLEST:
    MOV C, A
    JMP FIND_LOOP

STORE_RESULTS:
LXI H, 210AH
MOV M, B
LXI H, 210BH
MOV M, C

HLT

5. Write an ALP to sort an array of 10 elements from 2100H in ascending order.

ORG 2100H
DB 05H, 03H, 09H, 01H, 07H, 02H, 08H, 06H, 04H, 0AH

ORG 2000H
LXI H, 2100H
MVI B, 0AH
MVI C, 00H

OUTER_LOOP:
    MOV D, M
    INX H
    MOV E, M
    INX H
    MVI A, 00H

INNER_LOOP:
    CMP D
    JC NO_SWAP
    MOV M, D
    MOV A, 01H
    INX H
    MOV D, E
    MOV E, M
    JMP INNER_LOOP

NO_SWAP:
    DCR B
    JNZ OUTER_LOOP

HLT

6. Write an ALP to sort an array of 10 elements from 2100H in descending order.

ORG 2100H
DB 05H, 03H, 09H, 01H, 07H, 02H, 08H, 06H, 04H, 0AH

ORG 2000H
LXI H, 2100H
MVI B, 0AH
MVI C, 00H

OUTER_LOOP:
    MOV D, M
    INX H
    MOV E, M
    INX H
    MVI A, 00H

INNER_LOOP:
    CMP D
    JZ NO_SWAP
    JC SWAP
    JMP NO_SWAP

SWAP:
    MOV M, D
    INX H
    MOV M, E
    MOV A, 01H
    INX H
    MOV D, E
    MOV E, M
    JMP INNER_LOOP

NO_SWAP:
    DCR B
    JNZ OUTER_LOOP

HLT

Lab 3

Lab 3 : PROGRAMMING BASED ON BRANCH OPERATIONS

OBJECTIVE

To familiar with the use of branch operation related instructions in 8085 programming

PRELAB

Read and understand utilization of the instructions related to branch operations.

OVERVIEW OF BRANCH INSTRUCTIONS

Opcode	Operand	Description
JMP	16-bit	Jump on the 16-bit memory address
JC	16-bit	Jump on Carry
JNC	16-bit	Jump on no Carry
JZ	16-bit	Jump on Zero
JNZ	16-bit	Jump on no Zero
JP	16-bit	Jump on Plus
JM	16-bit	Jump on Minus
JPE	16-bit	Jump on Even Parity
JPO	16-bit	Jump on Odd Parity

EXERCISE

1. Write a program to multiply two 8 bit data stored at location 2101H and 2102H.

ORG 2100H
LXI H, 2101H
MOV A, M
INX H
MOV B, M
MVI C, 00H
MULTIPLY:
    CMP B
    JZ END
    ADD C
    MOV C, A
    DCR B
    JMP MULTIPLY
END:
LXI H, 2103H
MOV M, C
HLT

2. Write a program to add an array of 10 bytes data stored from location 5000H to 5009H and store the result at 500AH and 500BH.

ORG 5000H
DB 01H, 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H, 0AH

ORG 500AH
DB 00H, 00H

ORG 2000H
LXI H, 5000H
MVI C, 00H
MVI D, 00H
MVI B, 0AH

ADD_LOOP:
    MOV A, M
    ADD C
    MOV C, A
    INX H
    DCR B
    JNZ ADD_LOOP

LXI H, 500AH
MOV M, C
MOV A, D
MOV M, A

HLT

3. Write a program to subtract an array of 10 bytes data stored from location 5000H to 5009H and store the result at 500AH and 500BH.

ORG 5000H
DB 10H, 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H, 0AH

ORG 500AH
DB 00H, 00H

ORG 2000H
LXI H, 5000H
MOV A, M
INX H
MVI B, 09H

SUB_LOOP:
    MOV C, M
    SUB C
    INX H
    DCR B
    JNZ SUB_LOOP

LXI H, 500AH
MOV M, A
MOV A, L
MOV M, A

HLT

4. Write a program to find largest and smallest numbers in block of array from 2100H to 2109H. Store the result at location 210AH and 210BH.

ORG 2100H
DB 05H, 03H, 09H, 01H, 07H, 02H, 08H, 06H, 04H, 00H

ORG 210AH
DB 00H

ORG 210BH
DB 00H

ORG 2000H
LXI H, 2100H
MOV A, M
MOV B, A
MOV C, A
INX H
MVI D, 09H

FIND_LOOP:
    MOV A, M
    CMP B
    JG UPDATE_LARGEST
    CMP C
    JL UPDATE_SMALLEST
    INX H
    DCR D
    JNZ FIND_LOOP
    JMP STORE_RESULTS

UPDATE_LARGEST:
    MOV B, A
    JMP FIND_LOOP

UPDATE_SMALLEST:
    MOV C, A
    JMP FIND_LOOP

STORE_RESULTS:
LXI H, 210AH
MOV M, B
LXI H, 210BH
MOV M, C

HLT

5. Write an ALP to sort an array of 10 elements from 2100H in ascending order.

ORG 2100H
DB 05H, 03H, 09H, 01H, 07H, 02H, 08H, 06H, 04H, 0AH

ORG 2000H
LXI H, 2100H
MVI B, 0AH
MVI C, 00H

OUTER_LOOP:
    MOV D, M
    INX H
    MOV E, M
    INX H
    MVI A, 00H

INNER_LOOP:
    CMP D
    JC NO_SWAP
    MOV M, D
    MOV A, 01H
    INX H
    MOV D, E
    MOV E, M
    JMP INNER_LOOP

NO_SWAP:
    DCR B
    JNZ OUTER_LOOP

HLT

6. Write an ALP to sort an array of 10 elements from 2100H in descending order.

ORG 2100H
DB 05H, 03H, 09H, 01H, 07H, 02H, 08H, 06H, 04H, 0AH

ORG 2000H
LXI H, 2100H
MVI B, 0AH
MVI C, 00H

OUTER_LOOP:
    MOV D, M
    INX H
    MOV E, M
    INX H
    MVI A, 00H

INNER_LOOP:
    CMP D
    JZ NO_SWAP
    JC SWAP
    JMP NO_SWAP

SWAP:
    MOV M, D
    INX H
    MOV M, E
    MOV A, 01H
    INX H
    MOV D, E
    MOV E, M
    JMP INNER_LOOP

NO_SWAP:
    DCR B
    JNZ OUTER_LOOP

HLT