matrix_addition.asm

data segment
    
    matrix1 dw 01h, 02h, 03h
            dw 04h, 05h, 06h
            dw 07h, 08h, 09h           
    matrix2 dw 01h, 02h, 03h
            dw 04h, 05h, 06h
            dw 07h, 08h, 09h            
    result dw 9 dup(?)
    three dw 3     
    six dw 6
    
data ends

code segment                

    start:    
    mov ax, data
    mov ds, ax                   ;load ds with "data"
    
    mov si,0
    mov di,0
    mov ax,0
    mov bx,0                     ;clear registers
    mov cx,three                 ;load cx with number of rows
    loop1: 
    mov si,0
    push cx                      ;push outer loop's cx onto stack
    mov cx,three                 ;load cx with number of columns
        loop2:     
         mov ax,matrix1[bx][si]
         add ax,matrix2[bx][si]  ;add each element of both matrices
         mov result[bx][si], ax  ;store sum in "result" matrix
         inc si           
         inc si                  ;increment si
         loop loop2
    add bx,six                   ;increment bx for next row
    pop cx                       ;load cx with outer loop's value
    loop loop1
    
code ends 
    end start