.device ATMega8
.nolist
.include "C:\Program Files (x86)\Atmel\AVR Tools\AvrAssembler2\Appnotes\m8def.inc"
.list
;==================
.def tmp = r17
.def i = r18
.org 0x000
rjmp init
.org 0x009
rjmp timer0Ovf

init:
			ldi tmp, 0b00000001;
		 	out TIMSK, tmp;
		 	ldi tmp, 0b00000001;
			out TCCR0, tmp;
			ldi tmp, 0b11111111;
			out DDRB, tmp;
			out DDRC, tmp;
			;устанавливаем стек
			ldi tmp, low(RAMEND);
			out SPL, tmp;
			ldi tmp, high(RAMEND);
			out SPH, tmp;
			sei;
			ldi tmp, 0b00000000;
			rjmp loop;
loop:
			inc tmp;
			out PORTB, tmp;
			rjmp loop;
timer0Ovf:
			inc i;
			out PORTC, i;
			cpi i, 4;
			breq exit;
			reti;
exit:		
			rjmp exit;