videochargen/main.c

#include <avr/io.h>
#include <avr/interrupt.h>
#include "const.h"

char line_buffer[LINE_BUFFER_SIZE];

ISR(INT0_vect, ISR_NAKED) {
    asm("jmp int_vertical_sync");
}
ISR(INT1_vect, ISR_NAKED) {
    asm("jmp int_horizontal_sync");
}
ISR(TIMER0_COMPA_vect, ISR_NAKED) {
    asm("jmp int_timer_0");
}

void main_c() {
    for (int i = 0; i < LINE_BUFFER_SIZE; ++i) {
        line_buffer[i] = (i % 2) ? 0x0 : 0xff;
    }
}