int cursorX = 0;
int cursorY = 0;

void newl() {
  cursorY++;
  cursorX = 0;
  //// scrolling
  if (cursorY == MAX_ROWS) { //                                                 <----- scroll function
    char *vidmem = xyToVidmem(0, 1);
    while (vidmem < MAX_LEN) {
      *(vidmem - (MAX_COLS * 2)) = *vidmem;
      *(vidmem - (MAX_COLS * 2) + 1) = *(vidmem + 1);
      vidmem += 2;
    }
  }
}


int xyToVidmem(int x, int y) {
  char *vidmem = (char *)VIDEO_ADDRESS;
  vidmem += x * 2;
  vidmem += y * 2 * MAX_COLS;
  return vidmem;
}

int printf(char string[]) {
  int len = strlen(string);

  char *vidmem = xyToVidmem(cursorX, cursorY);


  while (*string != 0) {
    cursorX++;
    if (cursorX == MAX_ROWS) {
      newl();
    }

    *vidmem++ = *string++;
    *vidmem++ = 0x07;
  }
  newl();

  return 0;
}