I have written a code for 8086 microprocessor for taking string from keyboard and displaying it as follow

Title Get the string from keyboard and display it

.model small
.stack 100h
.data
	str1 db 'Enter String ','$'
	str2 db 50 dup('$')
	str3 db 0dh, 0ah, '$'
.code

main proc
	mov ax,@data
	mov ds,ax
	
	mov ah,09h     ; for displaying Enter String
	lea dx,str1
	int 21h
	

	mov ah,0ah	    ; for taking i/p from keyboard
	lea dx,str2
	int 21h
	
	
	mov ah,09h 	; for displaying in new line
	lea dx,str3
	int 21h
	
	mov ah,09h	        ; for displaying what you have entered
	lea dx,str2+2
	int 21h
	
	int 21h
	mov ah,4ch
	int 21h
	main endp

end main

I don't understand why we have to give effective address of the string as str+2 to print the inputted string back ? If simply lea dx, str2 is used no string is displayed.

Thanks in advance.

 

As I new to this forum, I don't know the much details about different features available here. Anyway thanks for your edit.

 

Look at what the DOS Buffer looks like for buffered input, and then tell us.

 

If offset 00 and 01 stores something then why it is not displaying anything when using str2 or str2+0 instead of str2+2.

 

Look at how you initialized STR2.