Write an assembly language program to calculate the following expression (M – N) ∙ P if X > Y M / N + P if X <= Y

Experiment Name: Write an assembly language program to calculate the following expression

(M – N) ∙ P if X > Y

M / N + P if X <= Y

Objective:

(i) To know about several command in the Assembly language.

(ii) Input a Character.

(iii) Output a Character.

Source Code:

.model small

.stack

print macro msg

                   lea dx,msg

                   mov ah,09h

                   int 21h

endm;end of macro

.data

                   msg1db0dh,0ah, “M=$”

                   msg2 db 0dh,0ah, ‘ N = $’

                   msg3db 0dh,0ah, ‘ P = $’

                   msg4 db 0dh,0ah, ‘ X = $’

                   msg5 db 0dh,0ah, ‘ Y = $’

                   msg6 db0dh,0ah, ‘ Z = (M-N)P = $’      ; if x > y

                   msg7db0dh,0ah, ‘ Z = (M/N)+P = $’ ; if x <= y

.code

main proc

                   mov ax,@data

                   mov ds,ax

                   print msg1

                   mov ah,01h

                   int 21h

                   sub al,30h

                   push ax

                   print msg2

                   mov ah,01h

                   int 21h

                   sub al,30h

                   push ax

                   print msg3

                   mov ah,01h

                   int 21h

                   sub al,30h

                   push ax

                   print msg4

                   mov ah,01h

                   int 21h

                   sub al,30h

                   mov bl,al

                   print msg5

                   mov ah,01h

                   int 21h

                   sub al,30h

                   cmp bl,al

                   jle step1

                   pop cx

                   pop bx

                   pop ax

                   sub al,bl

                   mul cl

                   jmp step3

          step1:

                   pop cx

                   pop bx

                   pop ax

                   mov ah,00

                   div bl

                   add al,cl

          step2:

                   push ax

                   print msg7

                   pop ax

                   mov dl,al

                   add dl,30h

                   mov ah,02h

                   int 21h

                   jmp L4

          step3:

                   push ax

                   print msg6

                   pop ax

                   mov dl,al

                   add dl,30h

                   mov ah,02h

                   int 21h

          L4:

                   mov ah,4ch

                   int 21h

main endp

end main

Input/output:

M=1

N=2

P=3

X=4

Y=5

Z=(M/N)+P = 3