public void CHECK_IRQ_LINES() {
        if ((m6800.cc & 0x10) == 0) {
            if (m6800.irq_state[M6800_IRQ_LINE] != CLEAR_LINE) {	/* stanadrd IRQ */

                ENTER_INTERRUPT("M6800#%d take IRQ1\n", 0xfff8);
                if (m6800.irq_callback != null) {
                    m6800.irq_callback.handler(M6800_IRQ_LINE);
                }
            } else {
                CHECK_IRQ2();
            }
        }
    }