; hi.asm - simple "hello world" program
; assemble with "nasm -f bin -o hi.com hi.asm"

org 100h         ; inform Nasm this is a .com file


section .data
msg db 'this is shyam!',0Dh,0Ah,'$'   ; $-terminated message
MSG1 DB "ENTER FIRST NO. $"
MSG2 DB 0AH,0DH,"ENTER THE SECOND NUMBER $"
MSG3 DB 0AH,0DH,"RESULT IS $"
a db 00h
b db 00h
sum db 00h
	

section .text		; int 21h is going to want...
;//;mov dx,msg		;the address of or message in dx
;//;mov ah,9         ; ah=9 - "print string" sub-function
;//;int 21h          ; call dos services
	
start:	mov dx,msg       ; the address of or message in dx
	mov ah,9         ; ah=9 - "print string" sub-function
	int 21h          ; call dos services
	mov ah,09h
	lea dx,[MSG1]
	int 21h
	mov ah,01h
	int 21h
	cmp al,3ah
	jb L0
	sub al,07h

L0:	mov cl,04h
	shl al,cl
	mov [a],al
	mov ah,01h
	int 21h
	cmp al,3ah
	jb L1
	sub al,07h
L1:	and al,0fh
	add [a],al
	mov ah,09h
	lea dx,[MSG2]
	int 21h
	mov ah,01h
	int 21h
	cmp al,3ah
	jb L2
	sub al,07h
L2:	mov cl,04h
	shl al,cl
	mov [b],al
	mov ah,01h
	int 21h
	cmp al,3ah
	jb L3
	sub al,07h
L3:	and al,0fh
	add al,[b]
	mov bl,al
	mov ah,09h
	lea dx,[MSG3]
	int 21h
	mov al,bl
	add al,[a]
	mov [sum],al
	mov bl,al
	mov cl,04h
	shr al,cl
	cmp al,0ah
	jb L4
	add al,07h
L4:	add al,30h
	mov dl,al
	mov ah,02h
	int 21h
	mov al,bl
	and al,0fh
	cmp al,0ah
	jb L5
	add al,07h
L5:	add al,30h
	mov dl,al
	mov ah,02h
	int 21h
	mov ah,4ch
	mov al,00h
	int 21h