.equ DDRB = 0x04

	.equ PORTB = 0x05

	.equ LEDP = 5

	.equ SPH = 0x3e

	.equ SPL = 0x3d

	.equ RAMEND_HI = 0x04

	.equ RAMEND_LO = 0xff



; Rest and Interrupt table for ATmega168

	.org 0

	jmp RESET		; Reset Handler

	jmp IgnoreINT		; IRQ0 Handler

	jmp IgnoreINT		; IRQ1 Handler

	jmp IgnoreINT		; PCINT0 Handler

	jmp IgnoreINT		; PCINT1 Handler

	jmp IgnoreINT		; PCINT2 Handler

	jmp IgnoreINT		; Watchdog Timer

	jmp IgnoreINT		; Timer2 Compare

	jmp IgnoreINT		; Timer2 Compare

	jmp IgnoreINT		; Timer2 Overflow Handler

	jmp IgnoreINT		; Timer1 Capture Handler

	jmp IgnoreINT		; Timer1 Compare A Handler

	jmp IgnoreINT		; Timer1 Compare B Handler

	jmp IgnoreINT		; Timer1 Overflow Handler

	jmp IgnoreINT		; Timer0 Compare A Handler

	jmp IgnoreINT		; Timer0 Compare B Handler

	jmp IgnoreINT		; Timer0 Overflow Handler

	jmp IgnoreINT		; SPI Transfer Complete Handler

	jmp IgnoreINT		; USART, RX Complete Handler

	jmp IgnoreINT		; USART, UDR Empty Handler

	jmp IgnoreINT		; USART, TX Complete Handler

	jmp IgnoreINT		; ADC Conversion Complete Handler

	jmp IgnoreINT		; EEPROM Ready Handler

	jmp IgnoreINT		; Analog Comparator Handler

	jmp IgnoreINT		; 2-wire Serial Interface Handler

	jmp IgnoreINT		; Store Program Memory Ready Handler



IgnoreINT:	reti



longDelay:

	clr   R1

	clr   R2		;R2 used as delay 3d count

delay_1:

	dec   R2

	brne  delay_1            

	dec   R1

	brne  delay_1           

	dec   R19

	brne  delay_1		; delay master count

	ret                     



RESET:

	ldi   r16, RAMEND_HI	; Main program start

	out   SPH,r16		;Set Stack Pointer to top of RAM

	ldi   r16, RAMEND_LO

	out   SPL,r16

	cli

	sbi   DDRB, LEDP		;connect LED to PORTD pin 5, aka D13



flash:	sbi   PORTB, LEDP	;LED on

	ldi   R19, 10		;X sec delay           

	rcall longDelay             

	cbi   PORTB, LEDP	;LED off            

	ldi   R19, 10		;X sec delay

	rcall longDelay

	rjmp  flash		;another run