Double tachometer code

After a few queries about code used for tachometer in my video:

I decided to publish it. It's much easire than sending code individually ;) It's written for atmega8 controller running on 1 MHz internal clock.

Code:

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stdlib.h>

volatile uint16_t count=0;        //revolution counter for INT0
volatile uint16_t count1=0;        //revolution counter for INT1

volatile uint16_t rpm=0;    //Revolution per minute
volatile uint16_t rps=0;    //Revolution per second

volatile uint16_t rpm1=0;   
volatile uint16_t rps1=0;

void main()
{

    char str[15];        //polje stringova za lcd
    lcd_init();lcd_clrscr();

    _delay_ms(1000);    //pricekati stabilizaciju

    //Init INT0
    MCUCR|=(1<<ISC01);    //Falling edge on INT0 triggers interrupt.
    GICR|=(1<<INT0);    //Enable INT0 interrupt/ General Interrupt control register

    //Init INT1
    MCUCR|=(1<<ISC11);    //Falling edge on INT1 triggers interrupt.
    GICR|=(1<<INT1);    //Enable INT1 interrupt


    //Timer1 is used as 1 sec time base
    //Timer Clock = 1/1024 of sys clock
    //Mode = CTC (Clear Timer On Compare)
    TCCR1B|=((1<<WGM12)|(1<<CS12)|(1<<CS10));

    //Compare value=976
    OCR1A=976;

    TIMSK|=(1<<OCIE1A);    //Output compare 1A interrupt enable

    //Enable interrupts globaly
    sei();

    lcd_goto(0x00);lcd_puts("rpm:");   
    lcd_goto(0x40);lcd_puts("Hz:");

    while(1)
    {
        rpm=rps*60;rpm1=rps1*60; //da se skrati vrijeme ISR, prebačeno iz ISR

        lcd_goto(0x04);itoa(rpm,str,10);lcd_puts(str);lcd_puts(" ");
        lcd_goto(0x44);itoa(rps,str,10);lcd_puts(str);lcd_puts(" ");

        lcd_goto(0x09);itoa(rpm1,str,10);lcd_puts(str);lcd_puts("   ");
        lcd_goto(0x49);itoa(rps1,str,10);lcd_puts(str);lcd_puts("   ");

       _delay_ms(300);    //display update
    }
   
}

ISR(INT0_vect)
{
    count++;
}

ISR(INT1_vect)
{
    count1++;
}

ISR(TIMER1_COMPA_vect)
{
    rps=count;rps1=count1;
    count=0;count1=0;
}

 I also used a bit enhanced version of code above for  my outboard motor multimeter (multi 'cause it measures rpm, gasoline flow and tank level). Take a look: