private void clockFineY() {
        // Y increment
        if ((address & 0x7000) == 0x7000) {
            address &= ~0x7000;
            if ((address & 0x03E0) == 0x3E0)
                address ^= 0x03E0;
            else if ((address & 0x03E0) == 0x03A0)
                address ^= 0x03A0 | 0x0800;
            else
                address += 0x0020;
        } else
            address += 0x1000;
    }