void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
{
    int y;
    if (y1 >= VGA_MAX_HEIGHT)
        return;
    if (y2 >= VGA_MAX_HEIGHT)
        y2 = VGA_MAX_HEIGHT;
    for(y = y1; y < y2; y++) {
        s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
    }
}

void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
{
    int y;
    if (y1 >= VGA_MAX_HEIGHT)
        return;
    if (y2 >= VGA_MAX_HEIGHT)
        y2 = VGA_MAX_HEIGHT;
    for(y = y1; y < y2; y++) {
        s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
    }
}
