Program to Calculate the Sum of Ten Numbers in Assembly Language

Code

[org 0x100]
mov ax,0
mov bx,0

l1:
add ax,[num1+bx] ;Addition will be stored in ax and in num1 array wise iteration will take place
add bx,2
cmp bx,20
jne l1

mov [total],ax

mov ax,0x4c00
int 0x21

num1: dw 10,20,30,40,50,10,20,30,40,50

total: dw 0

Explanation:

• This assembly code calculates the sum of ten numbers stored in the num1 array.

• The registers ax and bx are initialized to zero.

• The program enters a loop labeled l1 to iterate through the num1 array.

• Inside the loop, it adds the value at the current index of the num1 array to the accumulator ax.

• The index register bx is incremented by 2 to move to the next index of the array.

• After each iteration, the program compares the value of bx with 20 to check if it has reached the last index.

• If bx is not equal to 20, the program jumps back to the l1 label to continue adding the remaining numbers.

• Once all ten numbers have been processed, the final sum in ax is stored in the memory location total.

• The program then terminates by setting the value of ax to 0x4c00 (indicating program termination) and making an interrupt call to the operating system.

• The num1 array contains the numbers to be added, and the total memory location is used to store the final sum.

• The code efficiently calculates the sum without using a separate counter variable.

Instructions:

To run the program in a debugger write

• nasm file_name.asm -o file_name.com

• then afd file_name.com it will run the code written in that file

• 

To View the code Written

• The .lst file is generated during assembly and provides a detailed listing of the assembly source code, including memory addresses, machine code, symbol table, and debugging information, aiding in code review, debugging, and optimization.

• nasm file_name.asm -l file_name.lst to make .lst file and do code review and debugging.