diff --git a/src/mame/drivers/spacefb.c b/src/mame/drivers/spacefb.c
index 4d33ec5d0fa..626ba28fd7c 100644
--- a/src/mame/drivers/spacefb.c
+++ b/src/mame/drivers/spacefb.c
@@ -288,10 +288,10 @@ static INPUT_PORTS_START( spacefb )
 	PORT_DIPSETTING(    0x02, "5" )
 	PORT_DIPSETTING(    0x03, "6" )
 	PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW:3,4")
+	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
 	PORT_DIPSETTING(    0x04, DEF_STR( 2C_1C ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
 	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_2C ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( 1C_3C ) )
 	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW:5")
 	PORT_DIPSETTING(    0x00, "5000" )
 	PORT_DIPSETTING(    0x10, "8000" )
@@ -302,29 +302,22 @@ static INPUT_PORTS_START( spacefb )
 INPUT_PORTS_END
 
 
-/* same as Space Firebird, except for the difficulty switch */
+/* same as Space Firebird, except for the difficulty switch (replacing 5/6 lives) and 1C_3C (rather than 3C_1C) */
 static INPUT_PORTS_START( spacedem )
 	PORT_INCLUDE( spacefb )
 
 	PORT_MODIFY("DSW")
-	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Lives ) )
+	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Lives ) )  PORT_DIPLOCATION("SW:1")
 	PORT_DIPSETTING(    0x00, "3" )
 	PORT_DIPSETTING(    0x01, "4" )
-	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Difficulty ) )
+	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Difficulty ) )  PORT_DIPLOCATION("SW:2")
 	PORT_DIPSETTING(    0x00, DEF_STR( Easy ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
-	PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Coinage ) )
+	PORT_DIPSETTING(    0x02, DEF_STR( Hard ) )
+	PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Coinage ) )  PORT_DIPLOCATION("SW:3,4")
 	PORT_DIPSETTING(    0x04, DEF_STR( 2C_1C ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
 	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_2C ) )
 	PORT_DIPSETTING(    0x08, DEF_STR( 1C_3C ) )
-	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Bonus_Life ) )
-	PORT_DIPSETTING(    0x00, "5000" )
-	PORT_DIPSETTING(    0x10, "8000" )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Cabinet ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( Upright ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
-	PORT_BIT( 0xc0, IP_ACTIVE_HIGH, IPT_UNKNOWN )
 INPUT_PORTS_END
 
 
@@ -563,7 +556,7 @@ ROM_START( spacedem )
 	ROM_LOAD( "sdm-c-5n",    0x3800, 0x0800, CRC(7e0e41b0) SHA1(e7dd509ab36e0f9be6350b5fa9de4694224477db) )
 
 	ROM_REGION( 0x1000, "audiocpu", 0 )
-    ROM_LOAD( "sdm-e-20",    0x0000, 0x0400, CRC(55f40a0b) SHA1(8dff27b636f7f1831f71816505e451cf97fc3f98) )
+	ROM_LOAD( "sdm-e-20",    0x0000, 0x0400, CRC(55f40a0b) SHA1(8dff27b636f7f1831f71816505e451cf97fc3f98) )
 
 	ROM_REGION( 0x1000, "gfx1", 0 )  /* sprites */
 	ROM_LOAD( "sdm-v-5k",    0x0000, 0x0800, CRC(55758e4d) SHA1(1338b45f76f5a31a5350c953eac36cc543fbe62e) )