diff --git a/src/mame/drivers/ace.c b/src/mame/drivers/ace.c
index 492a587fa48..6f7b71611d3 100644
--- a/src/mame/drivers/ace.c
+++ b/src/mame/drivers/ace.c
@@ -123,7 +123,7 @@ static SCREEN_UPDATE( ace )
 
 static PALETTE_INIT( ace )
 {
-	palette_set_color(machine, 0, MAKE_RGB(0x10,0x20,0xd0)); /* light bluish */
+	palette_set_color(machine, 0, MAKE_RGB(0x00,0x00,0x00)); /* black */
 	palette_set_color(machine, 1, MAKE_RGB(0xff,0xff,0xff)); /* white */
 }
 
@@ -212,31 +212,31 @@ ADDRESS_MAP_END
 
 static INPUT_PORTS_START( ace )
 	PORT_START("c008")	/* player thrust */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(1) PORT_NAME("P1 Thrust")
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_2WAY PORT_PLAYER(1) PORT_NAME("P1 Thrust")
 
 	PORT_START("c009")	/* player slowdown */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1) PORT_NAME("P1 Slowdown")
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_2WAY PORT_PLAYER(1) PORT_NAME("P1 Slowdown")
 
 	PORT_START("c00a")	/* player left */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(1)
 
 	PORT_START("c00b")	/* player right */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(1)
 
 	PORT_START("c00c")	/* player fire */
 	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_NAME("P1 Fire")
 
 	PORT_START("c00d")	/* enemy thrust */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(2) PORT_NAME("P2 Thrust")
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_2WAY PORT_PLAYER(2) PORT_NAME("P2 Thrust")
 
 	PORT_START("c00e")	/* enemy slowdown */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2) PORT_NAME("P2 Slowdown")
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_2WAY PORT_PLAYER(2) PORT_NAME("P2 Slowdown")
 
 	PORT_START("c00f")	/* enemy left  */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(2)
 
 	PORT_START("c010")	/* enemy right */
-	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
+	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(2)
 
 	PORT_START("c011")	/* enemy fire */
 	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_NAME("P2 Fire")
@@ -390,4 +390,4 @@ ROM_START( ace )
 
 ROM_END
 
-GAME( 1976, ace, 0, ace, ace, 0, ROT0, "Allied Leisure", "Ace", GAME_SUPPORTS_SAVE | GAME_NO_SOUND | GAME_IMPERFECT_COLORS )
+GAME( 1976, ace, 0, ace, ace, 0, ROT0, "Allied Leisure", "Ace", GAME_SUPPORTS_SAVE | GAME_NO_SOUND )