diff --git a/src/mame/drivers/taitogn.c b/src/mame/drivers/taitogn.c
index dec84f76854..2fd890f1502 100644
--- a/src/mame/drivers/taitogn.c
+++ b/src/mame/drivers/taitogn.c
@@ -719,13 +719,13 @@ static INPUT_PORTS_START( coh3002t )
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
 
 	PORT_START("DSW")
-	PORT_DIPUNKNOWN_DIPLOC( 0x04, 0x04, "S551:1" )
+	PORT_DIPUNKNOWN_DIPLOC( 0x01, 0x01, "S551:1" )
 	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Service_Mode ) ) PORT_DIPLOCATION("S551:2") // bios testmode
 	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
 	PORT_DIPUNKNOWN_DIPLOC( 0x04, 0x04, "S551:3" )
-	PORT_DIPNAME( 0x02, 0x02, "Test Mode" )             PORT_DIPLOCATION("S551:4") // game testmode
-	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_DIPNAME( 0x08, 0x08, "Test Mode" )             PORT_DIPLOCATION("S551:4") // game testmode
+	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
 INPUT_PORTS_END