diff --git a/src/mess/drivers/ac1.c b/src/mess/drivers/ac1.c
index 46683958e08..bf67bbfff9e 100644
--- a/src/mess/drivers/ac1.c
+++ b/src/mess/drivers/ac1.c
@@ -53,7 +53,7 @@ ADDRESS_MAP_END
 
 /* Input ports */
 static INPUT_PORTS_START( ac1 )
-	PORT_START("LINE0")
+	PORT_START("LINE.0")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
@@ -63,7 +63,7 @@ static INPUT_PORTS_START( ac1 )
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
 
-	PORT_START("LINE1")
+	PORT_START("LINE.1")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(':') PORT_CHAR('*')
@@ -73,7 +73,7 @@ static INPUT_PORTS_START( ac1 )
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('>') PORT_CHAR('.')
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('?') PORT_CHAR('/')
 
-	PORT_START("LINE2")
+	PORT_START("LINE.2")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('@') PORT_CHAR('`')
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a')
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b')
@@ -83,7 +83,7 @@ static INPUT_PORTS_START( ac1 )
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f')
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g')
 
-	PORT_START("LINE3")
+	PORT_START("LINE.3")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h')
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i')
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j')
@@ -93,7 +93,7 @@ static INPUT_PORTS_START( ac1 )
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n')
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o')
 
-	PORT_START("LINE4")
+	PORT_START("LINE.4")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p')
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q')
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r')
@@ -103,7 +103,7 @@ static INPUT_PORTS_START( ac1 )
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v')
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w')
 
-	PORT_START("LINE5")
+	PORT_START("LINE.5")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x')
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y')
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z')
@@ -113,7 +113,7 @@ static INPUT_PORTS_START( ac1 )
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
 
-	PORT_START("LINE6")
+	PORT_START("LINE.6")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Ctrl")  PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL)
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
diff --git a/src/mess/includes/ac1.h b/src/mess/includes/ac1.h
index dff44d07d6b..b18cad87b24 100644
--- a/src/mess/includes/ac1.h
+++ b/src/mess/includes/ac1.h
@@ -20,9 +20,10 @@ public:
 		m_cassette(*this, "cassette"),
 		m_maincpu(*this, "maincpu"),
 		m_gfxdecode(*this, "gfxdecode"),
-		m_palette(*this, "palette")  { }
+		m_palette(*this, "palette"),
+		m_io_line(*this, "LINE")
+	{ }
 
-	required_device<cassette_image_device> m_cassette;
 	DECLARE_DRIVER_INIT(ac1);
 	virtual void machine_reset();
 	virtual void video_start();
@@ -32,9 +33,13 @@ public:
 	DECLARE_READ8_MEMBER(ac1_port_a_r);
 	DECLARE_WRITE8_MEMBER(ac1_port_a_w);
 	DECLARE_WRITE8_MEMBER(ac1_port_b_w);
+
+private:
+	required_device<cassette_image_device> m_cassette;
 	required_device<cpu_device> m_maincpu;
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
+	required_ioport_array<7> m_io_line;
 };
 
 /*----------- defined in video/ac1.c -----------*/
diff --git a/src/mess/machine/ac1.c b/src/mess/machine/ac1.c
index faa1411b57f..e504807ef96 100644
--- a/src/mess/machine/ac1.c
+++ b/src/mess/machine/ac1.c
@@ -27,13 +27,13 @@ READ8_MEMBER(ac1_state::ac1_port_b_r)
 
 READ8_MEMBER(ac1_state::ac1_port_a_r)
 {
-	UINT8 line0 = ioport("LINE0")->read();
-	UINT8 line1 = ioport("LINE1")->read();
-	UINT8 line2 = ioport("LINE2")->read();
-	UINT8 line3 = ioport("LINE3")->read();
-	UINT8 line4 = ioport("LINE4")->read();
-	UINT8 line5 = ioport("LINE5")->read();
-	UINT8 line6 = ioport("LINE6")->read();
+	UINT8 line0 = m_io_line[0]->read();
+	UINT8 line1 = m_io_line[1]->read();
+	UINT8 line2 = m_io_line[2]->read();
+	UINT8 line3 = m_io_line[3]->read();
+	UINT8 line4 = m_io_line[4]->read();
+	UINT8 line5 = m_io_line[5]->read();
+	UINT8 line6 = m_io_line[6]->read();
 
 	UINT8 SH    = BNOT(BIT(line6,0));
 	UINT8 CTRL  = BNOT(BIT(line6,1));