include <p16f887.inc>
LIST p = 16f887

	__CONFIG _CONFIG1, _LVP_OFF & _FCMEN_OFF & _IESO_OFF &_BOR_OFF & _CPD_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_ON & _WDT_OFF & _INTRC_OSC_NOCLKOUT
	__CONFIG _CONFIG2, _WRT_OFF & _BOR21V

CBLOCK 0x20
ENDC

CBLOCK 0x70
	W_temp
	STATUS_temp
ENDC

	ORG 0x000
	GOTO start

	ORG 0x004
	GOTO isr

start:
	BANKSEL OPTION_REG
	MOVLW 0x02
	MOVWF OPTION_REG

	CLRF INTCON

	BANKSEL OSCCON
	CLRF OSCCON

	BSF INTCON, INTE
	BSF INTCON, T0IE
	BSF INTCON, GIE

	BANKSEL ANSELH ;
	CLRF ANSELH ; Turn off ADC on PORTB!!!

	BANKSEL TRISB
	MOVLW 0x01
	MOVWF TRISB

	BANKSEL TRISD
	CLRF TRISD

	BANKSEL PORTD
	CLRF PORTD
loop:
	;SLEEP
	GOTO loop
isr:
	MOVWF W_temp
	SWAPF STATUS, W
	MOVWF STATUS_temp

	BANKSEL PORTD

	BTFSS INTCON, INTF
	INCF PORTD, F
	BCF INTCON, INTF

	BTFSS INTCON, T0IF
	CLRF PORTD
	BCF INTCON, T0IF

	MOVLW 0x3C
	SUBWF PORTD, W
	BTFSC STATUS, C
	CLRF PORTD

	SWAPF STATUS_temp, W
	MOVWF STATUS
	SWAPF W_temp, F
	SWAPF W_temp, W
	RETFIE

	END