diff --git a/src/mame/drivers/hh_tms1k.cpp b/src/mame/drivers/hh_tms1k.cpp
index 7fdead81956..52b8f1fe680 100644
--- a/src/mame/drivers/hh_tms1k.cpp
+++ b/src/mame/drivers/hh_tms1k.cpp
@@ -1664,6 +1664,9 @@ public:
 	DECLARE_WRITE16_MEMBER(write_r);
 	DECLARE_WRITE16_MEMBER(write_o);
 	DECLARE_READ8_MEMBER(read_k);
+
+protected:
+	virtual void machine_start() override;
 };
 
 // handlers
@@ -1763,6 +1766,14 @@ static INPUT_PORTS_START( quizwizc )
 	PORT_BIT( 0x0d, IP_ACTIVE_HIGH, IPT_UNUSED )
 INPUT_PORTS_END
 
+void quizwizc_state::machine_start()
+{
+	hh_tms1k_state::machine_start();
+
+	// register for savestates
+	save_item(NAME(m_pinout));
+}
+
 static MACHINE_CONFIG_START( quizwizc, quizwizc_state )
 
 	/* basic machine hardware */
@@ -1829,6 +1840,9 @@ public:
 	DECLARE_WRITE16_MEMBER(write_r);
 	DECLARE_WRITE16_MEMBER(write_o);
 	DECLARE_READ8_MEMBER(read_k);
+
+protected:
+	virtual void machine_start() override;
 };
 
 // handlers
@@ -1927,6 +1941,14 @@ static INPUT_PORTS_START( tc4 )
 	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_PLAYER(2) PORT_NAME("P2 D/K Button")
 INPUT_PORTS_END
 
+void tc4_state::machine_start()
+{
+	hh_tms1k_state::machine_start();
+
+	// register for savestates
+	save_item(NAME(m_pinout));
+}
+
 static MACHINE_CONFIG_START( tc4, tc4_state )
 
 	/* basic machine hardware */