;DEFINE  SFRs RELATED TO TIMER2
	
	T2MOD EQU 0C9H	;
	T2CON EQU 0C8H	;
	RCAP2H EQU 0CBH	;
	RCAP2L EQU 0CAH	;
	TL2 EQU 0CCH	;
	TH2 EQU 0CDH	;
	CTR EQU 2AH	; CTR = COUNTER FOR T2 INTERRUPT
;*****************************************************************************
;*****************************************************************************	


		ORG 002BH	; INTERRUPT SERVICE ROUTINE FOR T2

ISR_T2:		DJNZ CTR, EXIT	; DECREMENT COUNTER, EXIT IF NOT ZERO
		ACALL INPUTS	; ELSE CALL INPUTS SUBROUTINE
		MOV CTR, #0AH	; RESET COUNTER TO 0Ah
EXIT:		CLR 0CEH          ; (CLR EXF2 => T2CON.6)
		RETI		; RETURN FROM INTERRUPT


		ORG 0050H	; THIS IS MAIN LOOP

MAIN:		ACALL DISPLAY   ; 
		........        ;
		........        ;
		........        ;
		........        ;
		
		SJMP MAIN	; 


		ORG 0100H	; BOOT / INITIALIZATION SUBROUTINE

BOOT:		MOV TMOD, #11H	; LOAD TMOD WITH 11H (1011 binary) 
		MOV T2MOD, #02H	; LOAD T2MOD WITH 0000 0010 BINARY
		MOV T2CON, #00H	;
		MOV RCAP2L, #00H  ;
		MOV RCAP2H, #00H  ;
		MOV SP, #60H	; LOAD SP WITH 60H
		MOV P3, #0FFH	; 
		MOV P0, #0FFH	; 
		MOV P2, #0FFH	; 
		MOV P1, #0FFH	; 
		CLR P1.1          ; TURN OFF LED1(This happens to be T2EX  
                                   ; Pin of Timer2)
		CLR P1.3        ; TURN OFF LED2
		CLR P0.2        ; TURN OFF LED3
		MOV CTR, #0AH   ; COUNTER = 0Ah
		MOV IE, #0A0H   ; (ENABLE T2, SET EA=1, REST ALL =0)
		SETB 0CAH       ; (SET TR2= START TIMER2)
		SJMP MAIN       ; LONG JMP TO 0030H


		ORG 0200H	; SUBRTN FOR TAKING INPUT FORM P3

INPUTS:		MOV R2, #04H	;
		......
		......
		......
		RET		;


		ORG 0300H	; DISPLAY SUBRTN

DISPLAY:         JB ACC.7, JMP1	; JMP IF ACC.7=1
		SETB P1.1       ; 
		CLR P1.3        ; 
		CLR P0.2        ; 
		SJMP JMP3       ; 
JMP1:		JB ACC.6, JMP2  ; JMP IF ACC.6=1
		CLR P1.1        ; 
		SETB P1.3       ; 
		CLR P0.2        ; 
		SJMP JMP3       ; 
JMP2:		CLR P1.1        ; 
		SETB P0.2       ; 
		CLR P1.3        ; 
JMP3:		RET	        ;


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