#include <avr/io.h>

#include <util/delay.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>

#define F_CPU 4000000UL

#define GET_FAR_ADDRESS(var) \
({ \
    uint_farptr_t tmp; \
    \
    __asm__ __volatile__( \
    \
    "ldi %A0, lo8(%1)" "\n\t" \
    "ldi %B0, hi8(%1)" "\n\t" \
    "ldi %C0, hh8(%1)" "\n\t" \
    "clr %D0" "\n\t" \
    : \
    "=d" (tmp) \
    : \
    "p" (&(var)) \
    ); \
    tmp; \
})

const uint8_t tablica[] PROGMEM = {0x00, 0x01, 0xff, 0x03, 0xff, 0x05, 0xFF, 0xFF };

void showROM(uint8_t *wsk)
{
    uint8_t *tablica = wsk;
    uint8_t x,y;
    while(1)
    {
        x = pgm_read_byte_far(GET_FAR_ADDRESS(tablica));
        y = pgm_read_byte_far(GET_FAR_ADDRESS (++tablica));
        if(x==0xFF) {
            if(y==0xFF) {
                tablica=wsk;
                break;
            }
        }
        PORTB = ~x;
    }
}

int main(void)
{
    DDRA = 0x00;// Port A - przyciski, wejściowy
    PORTA = 0xFF;
    DDRB = 0xFF; // Port B - diody, wyjściowy
    PORTB = 0x00;

    showROM( &tablica[0]);
}