Implement an assembly language program to print sum of first “n” natural numbers,check even or odd,prime,“exchange data blocks of 10 Bytes,Move a block of data from one memory location,“Addition of Array of numbers”.

1. Implement an assembly language program to print sum of first “n”

natural numbers.

ANS→

MOV A,#07H

MOV B,A

INC A

MUL AB

MOV B,#02H

DIV AB

MOV R2,A

2. Write an assembly language program to check whether the given

the number is EVEN or ODD.

ANS→

MOV A,#07H

RRC A

JC ODD

MOV A,#00H

SJMP EVEN

ODD: MOV A,#01H

EVEN:NOP

3. Implement an assembly language program to check whether the given

number is prime or not.

ANS→

MAIN:    MOV R2,#11          ; Loading the number to be checked whether it's a prime or not

LABEL5:  MOV A,R2

         MOV B,#02  

         DIV AB              ;Dividing the number by 2

         MOV R0,A

         CJNE R0,#01H,LABEL2 ;Checking whether the number is 2

         SETB C

         SJMP LABEL4

LABEL1:  DEC R0           ; decrementing and checking whether the number is not divisible by all
possible values of number/2

         CJNE R0,#01H,LABEL2

         SETB C              ; setting the carry flag to 1 if it is a prime number

         SJMP LABEL4

LABEL2:  MOV A,R2

         MOV B,R0

         DIV AB

         MOV R3,B

         CJNE R3,#0H,LABEL1

         CLR C              ; setting the carry falg to 0 if it not a prime number

LABEL4:NOP

 END

4. Write an assembly language program for “Addition of Array of numbers”

in Edsim51.
ans-->
MOV A,#00H
MOV @R0,40H
MOV R1,#0AH
LOOP:
ADD A,@R0
INC R0
DJNZ R1,LOOP

5. Move a block of data from one memory location to others where memoryis addressed
through the indirect mode in both overlapping and non-overlapping case.

ans-->

WITHOUT OVERLAPPING

MOV @R0,40H
MOV R1,#0AH
MOV @R2,60H
LOOP:
MOV @R2,@R0
INC R0
INC R2
DJNZ R1, LOOP

WITH OVERLAPPING
MOV @R0,50H
MOV R1,#0AH
MOV @R2,5FH
LOOP:
MOV @R2,@R0
DEC R0
DEC R2

DJNZ R1, LOOP

6. Implement an assembly language program to “exchange data blocks of 10 Bytes”.

MOV R0,#20H

MOV R1,#30H

MOV R2,#0AH

UP:

MOV A,@R0

XCH A,@R1

MOV @R0,A

INC R0

INC R1

DJNZ R2,UP

RET