diff --git a/src/mame/drivers/powerbal.c b/src/mame/drivers/powerbal.c
index 909f9c845cb..fe3f6730931 100644
--- a/src/mame/drivers/powerbal.c
+++ b/src/mame/drivers/powerbal.c
@@ -320,6 +320,86 @@ static INPUT_PORTS_START( magicstk )
 	PORT_DIPSETTING(    0xe0, "Easy 9" )
 INPUT_PORTS_END
 
+static INPUT_PORTS_START( hotminda )
+	PORT_START("IN0")
+	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
+	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
+
+	PORT_START("IN1")
+	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(1)
+	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(1)
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
+	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
+
+	PORT_START("IN2")
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(eeprom_bit_r, NULL)	/* EEPROM data */
+	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_VBLANK )
+	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
+
+	PORT_START("DSW1")
+	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )	PORT_DIPLOCATION("DSW1:8")
+	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x06, 0x06, "Premio" )			PORT_DIPLOCATION("DSW1:7,6")
+	PORT_DIPSETTING(    0x00, "1 Premio ogni 10 Vincite" )
+	PORT_DIPSETTING(    0x04, "1 Premio ogni 10 Vincite" )
+	PORT_DIPSETTING(    0x02, "1 Premio ogni 5 Vincite" )
+	PORT_DIPSETTING(    0x06, "Paga 1 Premio ogni Vincita" )
+	PORT_DIPNAME( 0x18, 0x18, DEF_STR( Coin_B )	)	PORT_DIPLOCATION("DSW1:5,4")
+	PORT_DIPSETTING(    0x18, DEF_STR( 1C_2C ) )
+	PORT_DIPSETTING(    0x08, DEF_STR( 1C_3C ) )
+	PORT_DIPSETTING(    0x10, DEF_STR( 1C_5C ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( 1C_6C ) )
+	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )	PORT_DIPLOCATION("DSW2:3")
+	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )	PORT_DIPLOCATION("DSW1:2")
+	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )	PORT_DIPLOCATION("DSW1:1")
+	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+
+	PORT_START("DSW2")
+	PORT_DIPNAME( 0x01, 0x01, "Clear Counters" )	PORT_DIPLOCATION("DSW2:8")
+	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x02, 0x02, "Ticket" )			PORT_DIPLOCATION("DSW2:7")
+	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x04, 0x04, "Hopper" )			PORT_DIPLOCATION("DSW2:6")
+	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Demo_Sounds ) )	PORT_DIPLOCATION("DSW2:5")
+	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_SERVICE( 0x10, IP_ACTIVE_LOW )					PORT_DIPLOCATION("DSW2:4")
+	PORT_DIPNAME( 0xe0, 0x60, DEF_STR( Difficulty ) )	PORT_DIPLOCATION("DSW2:3,2,1")
+	PORT_DIPSETTING(    0xa0, "Hard 7" )
+	PORT_DIPSETTING(    0x20, "Very Hard 6" )
+	PORT_DIPSETTING(    0xc0, "Very Hard 5" )
+	PORT_DIPSETTING(    0x40, "Very Hard 4" )
+	PORT_DIPSETTING(    0x80, "Very Hard 3" )
+	PORT_DIPSETTING(    0x00, "Very Hard 2" )
+	PORT_DIPSETTING(    0x60, "Normal 8" )
+	PORT_DIPSETTING(    0xe0, "Easy 9" )
+INPUT_PORTS_END
+
 static TILE_GET_INFO( powerbal_get_bg_tile_info )
 {
 	int code = (magicstk_videoram[tile_index] & 0x07ff) + magicstk_tilebank * 0x800;
@@ -606,6 +686,11 @@ static DRIVER_INIT( magicstk )
 	yoffset = -5;
 }
 
-GAME( 1994, powerbal, 0, powerbal, powerbal, powerbal, ROT0, "Playmark", "Power Balls", 0 )
-GAME( 1995, magicstk, 0, magicstk, magicstk, magicstk, ROT0, "Playmark", "Magic Sticks", 0 )
-GAME( 1995, hotminda, hotmind, magicstk, magicstk, magicstk, ROT0, "Playmark", "Hot Mind (set 2)", GAME_NOT_WORKING )
+/*************************
+*      Game Drivers      *
+*************************/
+
+/*    YEAR  NAME      PARENT   MACHINE   INPUT     INIT      ROT    COMPANY     FULLNAME                      FLAGS */
+GAME( 1994, powerbal, 0,       powerbal, powerbal, powerbal, ROT0, "Playmark", "Power Balls",                 0 )
+GAME( 1995, magicstk, 0,       magicstk, magicstk, magicstk, ROT0, "Playmark", "Magic Sticks",                0 )
+GAME( 1995, hotminda, hotmind, magicstk, hotminda, magicstk, ROT0, "Playmark", "Hot Mind (adjustable prize)", 0 )