diff --git a/src/mame/drivers/eolith.c b/src/mame/drivers/eolith.c
index 62abf179050..0ed6392e5f4 100644
--- a/src/mame/drivers/eolith.c
+++ b/src/mame/drivers/eolith.c
@@ -188,6 +188,60 @@ static INPUT_PORTS_START( common )
 	PORT_BIT( 0xffffffff, IP_ACTIVE_LOW, IPT_UNUSED	)
 INPUT_PORTS_END
 
+static INPUT_PORTS_START( ironfort )
+	PORT_START("IN0")
+	PORT_BIT( 0x00000001, IP_ACTIVE_LOW, IPT_START1 )
+	PORT_BIT( 0x00000002, IP_ACTIVE_LOW, IPT_START2 )
+	PORT_BIT( 0x00000004, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x00000008, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(eeprom_bit_r, NULL) // eeprom bit
+	PORT_BIT( 0x00000010, IP_ACTIVE_LOW, IPT_COIN1 )
+	PORT_BIT( 0x00000020, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x00000040, IP_ACTIVE_LOW, IPT_SPECIAL ) PORT_CUSTOM(eolith_speedup_getvblank, NULL)
+	PORT_BIT( 0x00003f80, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x00004000, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_SERVICE_NO_TOGGLE( 0x00008000, IP_ACTIVE_LOW )
+	PORT_BIT( 0x00010000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP	) PORT_8WAY PORT_PLAYER(1)
+	PORT_BIT( 0x00020000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN	) PORT_8WAY PORT_PLAYER(1)
+	PORT_BIT( 0x00040000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT	) PORT_8WAY PORT_PLAYER(1)
+	PORT_BIT( 0x00080000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT	) PORT_8WAY PORT_PLAYER(1)
+	PORT_BIT( 0x00100000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
+	PORT_BIT( 0x00200000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
+	PORT_BIT( 0x00400000, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x00800000, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x01000000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP	) PORT_8WAY PORT_PLAYER(2)
+	PORT_BIT( 0x02000000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN	) PORT_8WAY PORT_PLAYER(2)
+	PORT_BIT( 0x04000000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT	) PORT_8WAY PORT_PLAYER(2)
+	PORT_BIT( 0x08000000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT	) PORT_8WAY PORT_PLAYER(2)
+	PORT_BIT( 0x10000000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
+	PORT_BIT( 0x20000000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
+	PORT_BIT( 0x40000000, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x80000000, IP_ACTIVE_LOW, IPT_UNUSED )
+
+	PORT_START("DSW1")
+	PORT_DIPNAME( 0x00000030, 0x00000030, DEF_STR( Coinage ) )
+	PORT_DIPSETTING(          0x00000010, DEF_STR( 3C_1C ) )
+	PORT_DIPSETTING(          0x00000020, DEF_STR( 2C_1C ) )
+	PORT_DIPSETTING(          0x00000030, DEF_STR( 1C_1C ) )
+	PORT_DIPSETTING(          0x00000000, DEF_STR( Free_Play ) )
+	PORT_DIPNAME( 0x000000c0, 0x000000c0, DEF_STR( Difficulty ) )
+	PORT_DIPSETTING(          0x00000000, DEF_STR( Very_Hard ) )
+	PORT_DIPSETTING(          0x00000040, DEF_STR( Hard ) )
+	PORT_DIPSETTING(          0x000000c0, DEF_STR( Normal ) )
+	PORT_DIPSETTING(          0x00000080, DEF_STR( Easy ) )
+	PORT_DIPNAME( 0x00000001, 0x00000001, "Show Dip-switch Information" )
+	PORT_DIPSETTING(          0x00000001, DEF_STR( Off ) )
+	PORT_DIPSETTING(          0x00000000, DEF_STR( On ) )
+	PORT_DIPNAME( 0x00000002, 0x00000000, DEF_STR( Demo_Sounds ) )
+	PORT_DIPSETTING(          0x00000002, DEF_STR( Off ) )
+	PORT_DIPSETTING(          0x00000000, DEF_STR( On ) )
+	PORT_DIPNAME( 0x0000000c, 0x0000000c, DEF_STR( Lives ) )
+	PORT_DIPSETTING(          0x00000008, "1" )
+	PORT_DIPSETTING(          0x00000004, "2" )
+	PORT_DIPSETTING(          0x0000000c, "3" )
+	PORT_DIPSETTING(          0x00000000, "4" )
+	PORT_BIT( 0xffffff00, IP_ACTIVE_LOW, IPT_UNUSED	)
+INPUT_PORTS_END
+
 static INPUT_PORTS_START( hidnctch )
 	PORT_INCLUDE(common)
 	PORT_MODIFY("IN0")
@@ -993,7 +1047,7 @@ static DRIVER_INIT( hidctch3 )
 	init_eolith_speedup(machine);
 }
 
-GAME( 1998, ironfort, 0,       ironfort, common,   eolith,   ROT0, "Eolith", "Iron Fortress", GAME_NO_SOUND ) /* actual DIPs need to be added */
+GAME( 1998, ironfort, 0,       ironfort, ironfort, eolith,   ROT0, "Eolith", "Iron Fortress", GAME_NO_SOUND )
 GAME( 1998, hidnctch, 0,       eolith45, hidnctch, eolith,   ROT0, "Eolith", "Hidden Catch (World) / Tul Lin Gu Lim Chat Ki '98 (Korea) (pcb ver 3.03)",  GAME_NO_SOUND ) // or Teurrin Geurim Chajgi '98
 GAME( 1998, raccoon,  0,       eolith45, raccoon,  eolith,   ROT0, "Eolith", "Raccoon World", GAME_NO_SOUND )
 GAME( 1998, puzzlekg, 0,       eolith45, puzzlekg, eolith,   ROT0, "Eolith", "Puzzle King (Dance & Puzzle)",  GAME_NO_SOUND )
diff --git a/src/mame/drivers/eolithsp.c b/src/mame/drivers/eolithsp.c
index d75a2583303..04dc5726822 100644
--- a/src/mame/drivers/eolithsp.c
+++ b/src/mame/drivers/eolithsp.c
@@ -39,6 +39,7 @@ static const struct
 } eolith_speedup_table[] =
 {
 	/* eolith.c */
+	{ "ironfort", 0x40020854, 239 },
 	{ "hidnctch", 0x4000bba0, 239 },
 	{ "raccoon",  0x40008204, 239 },
 	{ "puzzlekg", 0x40029458, 239 },