diff --git a/src/mame/machine/namco_c148.cpp b/src/mame/machine/namco_c148.cpp
index 2086aab544f..e66d54721f7 100644
--- a/src/mame/machine/namco_c148.cpp
+++ b/src/mame/machine/namco_c148.cpp
@@ -174,6 +174,21 @@ void namco_c148_device::pos_irq_trigger()
 	m_hostcpu->set_input_line(m_irqlevel.pos, ASSERT_LINE);
 }
 
+void namco_c148_device::cpu_irq_trigger()
+{
+	m_hostcpu->set_input_line(m_irqlevel.cpu, ASSERT_LINE);
+}
+
+void namco_c148_device::ex_irq_trigger()
+{
+	m_hostcpu->set_input_line(m_irqlevel.ex, ASSERT_LINE);
+}
+
+void namco_c148_device::sci_irq_trigger()
+{
+	m_hostcpu->set_input_line(m_irqlevel.sci, ASSERT_LINE);
+}
+
 uint8_t namco_c148_device::get_posirq_line()
 {
 	return m_posirq_line;
diff --git a/src/mame/machine/namco_c148.h b/src/mame/machine/namco_c148.h
index 8b1340a9499..6e636e1fd4c 100644
--- a/src/mame/machine/namco_c148.h
+++ b/src/mame/machine/namco_c148.h
@@ -66,14 +66,16 @@ public:
 	DECLARE_WRITE8_MEMBER( sci_irq_level_w );
 	DECLARE_READ16_MEMBER( sci_irq_ack_r );
 	DECLARE_WRITE16_MEMBER( sci_irq_ack_w );
-	
-	
+
 	DECLARE_READ8_MEMBER( ext_posirq_line_r );
 	DECLARE_WRITE8_MEMBER( ext_posirq_line_w );
 
 	DECLARE_WRITE8_MEMBER( ext2_w );
 	void vblank_irq_trigger();
 	void pos_irq_trigger();
+	void cpu_irq_trigger();
+	void ex_irq_trigger();
+	void sci_irq_trigger();
 	uint8_t get_posirq_line();
 
 protected: