getting input from user

[ogito]

I need to get input from the user, check the range of the number, then reprint the number to the screen. This is what I have so far

main:

	mov ax, 0
	mov [sum], ax

beg:
	mov eax, 3
	mov ebx, 0
	mov ecx, chr
	mov edx, 3
	int 0x80

	cmp byte [chr], 0x30
	jb e1
	cmp byte [chr], 0x39
	ja e1
   ;;This converts the input into a number
	
	mov ax, [sum]
	imul ax, 10
	mov bx, 0
	mov bl, [chr	sub bl, 0x30
	add ax, bx
	mov [sum], ax
	jmp beg
;;Check the number 
e1:	cmp word [sum], 125
	ja tobig
	mov ecx, right
	mov edx, rlen
	jmp e2

;	mov al, [sum]
;	mov si, 0

;e3:	mov ah, 0
;	mov bl, 10
;	idiv bl
;	add ah, 0x30
;	mov [num], ah
;	inc si
;	cmp al, 0
;	je e2
;	jmp e3


tobig:	mov ecx, big
	mov edx, blen


e2:	mov eax, 4
	mov ebx, 1
	int 0x80