Hello Arif,

Michael Neary is correct. I had this problem and it
drove me nuts.
Try the below program. Notice the instruction MOV
A,#0C2h ; 2nd line will fix the second half of the
display. Read about this in the tutor section.

Regards,

Charles Bannister

;;*********************************************************************
;; Hello World. Greeting upon power up.
;;*********************************************************************
 
HW1:
	MOV   A,#'H'
 	LCALL WRITE_TEXT
 	MOV   A,#'E'
 	LCALL WRITE_TEXT
 	MOV   A,#'L'
 	LCALL WRITE_TEXT
 	MOV   A,#'L'
 	LCALL WRITE_TEXT
 	MOV   A,#'O'
 	LCALL WRITE_TEXT
 	MOV   A,#0C2h			; 2nd line 
 	LCALL SendINS                   ; send command
 	LCALL WAIT_LCD
 	MOV   A,#'W'
 	LCALL WRITE_TEXT
 	MOV   A,#'O'
 	LCALL WRITE_TEXT
 	MOV   A,#'R'
 	LCALL WRITE_TEXT
 	MOV   A,#'L'
 	LCALL WRITE_TEXT
 	MOV   A,#'D'
 	LCALL WRITE_TEXT 
 	RET