Question

Using visual studio in MASM x86,

Write a program to add the following word size numbers: 15F2, 9E89, 8342, 99FF, 7130 using adc instruction and a loop. The result must be in DX, AX. Show the result in debug window.

Answer 1

Code:

.model small

.data

               num1 dw 15F2H

               dw 9E89H

               num2 dw 8342H

               dw 99FFH

               dw 7130H

               result dw 0,0,0,0

.code

               mov ax,@data

               mov ds,ax

               mov ax,num1

               mul num2

               mov result,ax

               mov result+2,dx

               mov ax,num1+2

               mul num2

               add result+2,ax

               adc result+4,dx

               adc result+6,0

               mov ax,num1

               mul num2+2

               add result+2,ax

               adc result+4,dx

               adc result+6,0

               mov ax,num1+2

               mul num2+2

               add result+4,ax

               adc result+6,dx

               mov ax,4C00h

               int 21h

end