diff --git a/scripts/target/mame/arcade.lua b/scripts/target/mame/arcade.lua
index 8d31b543f9a..d38b781e9b2 100644
--- a/scripts/target/mame/arcade.lua
+++ b/scripts/target/mame/arcade.lua
@@ -4977,6 +4977,7 @@ files {
 	MAME_DIR .. "src/mame/drivers/skyarmy.cpp",
 	MAME_DIR .. "src/mame/drivers/skylncr.cpp",
 	MAME_DIR .. "src/mame/drivers/sliver.cpp",
+	MAME_DIR .. "src/mame/drivers/smotor.cpp",
 	MAME_DIR .. "src/mame/drivers/smsmcorp.cpp",
 	MAME_DIR .. "src/mame/drivers/sothello.cpp",
 	MAME_DIR .. "src/mame/drivers/spool99.cpp",
diff --git a/src/emu/ioport.cpp b/src/emu/ioport.cpp
index 7efe86226ca..09bea86931e 100644
--- a/src/emu/ioport.cpp
+++ b/src/emu/ioport.cpp
@@ -189,6 +189,7 @@ const struct
 	{ INPUT_STRING_3C_1C, "3 Coins/1 Credit" },
 	{ INPUT_STRING_8C_3C, "8 Coins/3 Credits" },
 	{ INPUT_STRING_4C_2C, "4 Coins/2 Credits" },
+	{ INPUT_STRING_5C_2C, "5 Coins/2 Credits" },
 	{ INPUT_STRING_2C_1C, "2 Coins/1 Credit" },
 	{ INPUT_STRING_5C_3C, "5 Coins/3 Credits" },
 	{ INPUT_STRING_3C_2C, "3 Coins/2 Credits" },
@@ -197,6 +198,7 @@ const struct
 	{ INPUT_STRING_3C_3C, "3 Coins/3 Credits" },
 	{ INPUT_STRING_2C_2C, "2 Coins/2 Credits" },
 	{ INPUT_STRING_1C_1C, "1 Coin/1 Credit" },
+	{ INPUT_STRING_3C_5C, "3 Coins/5 Credits" },
 	{ INPUT_STRING_4C_5C, "4 Coins/5 Credits" },
 	{ INPUT_STRING_3C_4C, "3 Coins/4 Credits" },
 	{ INPUT_STRING_2C_3C, "2 Coins/3 Credits" },
diff --git a/src/emu/ioport.h b/src/emu/ioport.h
index 4a2270c985a..82834584815 100644
--- a/src/emu/ioport.h
+++ b/src/emu/ioport.h
@@ -453,13 +453,13 @@ enum
 	INPUT_STRING_3C_1C,     //  0.333333
 	INPUT_STRING_8C_3C,     //  0.375000
 //  INPUT_STRING_10C_4C,    //  0.400000
-//  INPUT_STRING_5C_2C,     //  0.400000
 //  INPUT_STRING_7C_3C,     //  0.428571
 //  INPUT_STRING_9C_4C,     //  0.444444
 //  INPUT_STRING_10C_5C,    //  0.500000
 //  INPUT_STRING_8C_4C,     //  0.500000
 //  INPUT_STRING_6C_3C,     //  0.500000
 	INPUT_STRING_4C_2C,     //  0.500000
+    INPUT_STRING_5C_2C,     //  0.500000
 	INPUT_STRING_2C_1C,     //  0.500000
 //  INPUT_STRING_9C_5C,     //  0.555556
 //  INPUT_STRING_7C_4C,     //  0.571429
@@ -497,6 +497,7 @@ enum
 //  INPUT_STRING_6C_7C,     //  1.166667
 //  INPUT_STRING_5C_6C,     //  1.200000
 //  INPUT_STRING_8C_10C,    //  1.250000
+	INPUT_STRING_3C_5C,     //  1.250000
 	INPUT_STRING_4C_5C,     //  1.250000
 //  INPUT_STRING_7C_9C,     //  1.285714
 //  INPUT_STRING_6C_8C,     //  1.333333
diff --git a/src/mame/arcade.flt b/src/mame/arcade.flt
index 81f8a8e1369..315c57d4821 100644
--- a/src/mame/arcade.flt
+++ b/src/mame/arcade.flt
@@ -1147,6 +1147,7 @@ slapshot.cpp
 sleic.cpp
 sliver.cpp
 slotcarn.cpp
+smotor.cpp
 smsmcorp.cpp
 sms_bootleg.cpp
 snesb.cpp
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 7df169c2bab..0c8fe4c9473 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -37140,6 +37140,9 @@ smspal                          // Sega Master System II (PAL)
 smspaln                         // Tec Toy Master System III Compact (PAL-N)
 smssdisp                        // Sega Master System Store Display Unit
 
+@source:smotor.cpp
+smotor                          // (c) 19?? Duintronic
+
 @source:smsmcorp.cpp
 secondch                        // (c) 1985 SMS MFG CORP
 sureshot                        // (c) 1985 SMS MFG CORP