Please Modify the following code and change the following A) To B):

A) The following code is asking to write 3 letters for example (Ali) when the cursor is blinking letter will be entered after the other.

B) When you enter the first letter the cursor will move forward asking for the second letter

, So the previous letters should be cleared from the screen and showed again by make delay to prove that they cleared and appeared again using (count3 dw 0ffffh ;delay) as in data segment and then ask user for the next letter.

Please write ;comment for the instructions that you add in assembly code.

code is below :-

.MODEL SMALL

.STACK 64

.DATA

letter db ?

count1 db 3

count2 db 0

tt db 0 ;number of characters

count3 dw 0ffffh ;delay

.CODE

MAIN: mov ax,@DATA

mov ds,ax

;clearing the screen

MOV AX,0600H ;scroll the entire page

MOV BH,07 ;normal attribute

MOV CX,0000 ;row and column of the top left

MOV DX,184FH ;row and column of the bottom right

INT 10H ;invoke interrupt 10H

;setting the cursor to the center of the screen

MOV AH,02 ;set cursor option

MOV BH,00 ;page 0

MOV DL,39 ;center column position

MOV DH,12 ;center row position

INT 10H ;invoke interrupt 10H

NEXT:

mov cl,0

mov si,offset letter

mov ah,01h

int 21h ;

mov [si],bl

inc si

inc cl

back:mov ah,02h ;printing letter

mov di,offset letter

mov dl,[di]

int 21h

inc di

dec cl

jnz back

dec count1

jnz NEXT

mov ah,4ch

int 21h

END MAIN