ACALL	DELAY_200ms 
	
		MOV	TMOD,#20H
		MOV 	SCON,#50H
		MOV 	TH1,#-3	
		SETB 	TR1
		MOV 	R0,#10 	
		MOV 	A,#20H 	
		MOVX 	@R0,A 	
		MOV 	R0,#11 	
   		MOV 	A,#83H  	
   		MOVX 	@R0,A  	
		MOV 	R0,#07  	
   		MOV	A,#24H 	
		MOVX 	@R0,A  	
   		ACALL DELAY 	
 		MOV 	R0,#08  	
		MOV 	A,#10H 	
   		MOVX 	@R0,A  	
		ACALL DELAY 	
   		MOV 	R0,#09	
		MOV 	A,#04 	
   		MOVX 	@R0,A  	
   		ACALL DELAY
		MOV 	R0,#11 	
		MOV 	A,#03  	
   		MOVX 	@R0,A  	
OV2:		MOV	A,#20H	
		ACALL SERIAL
		MOV	A,#'2'	
		ACALL SERIAL
		MOV	A,#'0'	
		ACALL SERIAL
		MOV 	R0,#09  	
		MOVX 	A,@R0  	
		ACALL DISPLAY
		MOV	A,#':'	
		ACALL SERIAL
		MOV	R0,#08 	
		MOVX 	A,@R0  	
		ACALL DISPLAY
		ACALL DELAY
		MOV	A,#':'	
		ACALL SERIAL
		MOV  	R0,#07  	
		MOVX 	A,@R0  	
		ACALL DISPLAY
		ACALL DELAY
		MOV	A,#' '	
		ACALL SERIAL
		ACALL DELAY
		MOV	A,#' '	
		ACALL SERIAL
		ACALL DELAY
		MOV	A,#0AH	
		ACALL SERIAL
		MOV	A,#0DH	
		ACALL SERIAL
		ACALL DELAY
		LJMP OV2		
DELAY:
		MOV 	R7,#250
D1:		DJNZ 	R7,D1
      	RET
DISPLAY:
		MOV 	B,A
		SWAP 	A
		ANL 	A,#0FH
		ORL 	A,#30H
		ACALL SERIAL
		MOV 	A,B
		ANL 	A,#0FH
		ORL 	A,#30H
		ACALL SERIAL
		RET
SERIAL:
		MOV 	SBUF,A
S1:		JNB 	TI,S1
	   	CLR 	TI
	   	RET
      	END