diff --git a/src/mame/misc/katosmedz80.cpp b/src/mame/misc/katosmedz80.cpp
index 9c6b3c2a7a5..a9592f3a7f5 100644
--- a/src/mame/misc/katosmedz80.cpp
+++ b/src/mame/misc/katosmedz80.cpp
@@ -106,20 +106,15 @@ static INPUT_PORTS_START( dnbanban )
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_8) PORT_NAME("IN0-8")
 
 	PORT_START("IN1")
-	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_Q) PORT_NAME("IN1-1")
-	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_W) PORT_NAME("IN1-2")
-	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_E) PORT_NAME("IN1-3")
-	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_R) PORT_NAME("IN1-4")
-	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_T) PORT_NAME("IN1-5")
-	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_Y) PORT_NAME("IN1-6")
-	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_U) PORT_NAME("IN1-7")
-	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_I) PORT_NAME("IN1-8")
+//	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_Q) PORT_NAME("IN1-1")
+//	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_W) PORT_NAME("IN1-2")
+//	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_E) PORT_NAME("IN1-3")
+//	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_R) PORT_NAME("IN1-4")
 
-	PORT_START("DSW") // 4-DIP bank
 	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
+	PORT_DIPNAME( 0x02, 0x02, "Test Sounds" )
 	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
 	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
@@ -128,7 +123,12 @@ static INPUT_PORTS_START( dnbanban )
 	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
 	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
-	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNKNOWN )
+
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_T) PORT_NAME("Coin A")
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_Y) PORT_NAME("Coin B")
+	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_CODE(KEYCODE_U) PORT_NAME("IN1-7")
+	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_I) PORT_NAME("IN1-8")
+
 INPUT_PORTS_END