diff --git a/src/boards/addrlatch.cpp b/src/boards/addrlatch.cpp
index b3f44c88..041cf885 100644
--- a/src/boards/addrlatch.cpp
+++ b/src/boards/addrlatch.cpp
@@ -220,6 +220,23 @@ void Mapper92_Init(CartInfo *info) {
 	Latch_Init(info, M92Sync, NULL, 0x80B0, 0x8000, 0xFFFF, 0);
 }
 
+//------------------ Map 174 ---------------------------
+
+static void M174Sync(void) {
+	if (latche & 0x80) {
+		setprg32(0x8000, (latche >> 5) & 3);
+	} else {
+		setprg16(0x8000, (latche >> 4) & 7);
+		setprg16(0xC000, (latche >> 4) & 7);
+	}
+	setchr8((latche >> 1) & 7);
+	setmirror((latche & 1) ^ 1);
+}
+
+void Mapper174_Init(CartInfo *info) {
+	Latch_Init(info, M174Sync, NULL, 0, 0x8000, 0xFFFF, 0);
+}
+
 //------------------ Map 200 ---------------------------
 
 static void M200Sync(void) {
diff --git a/src/ines.cpp b/src/ines.cpp
index be7543a6..6873bdc5 100644
--- a/src/ines.cpp
+++ b/src/ines.cpp
@@ -689,7 +689,7 @@ BMAPPINGLocal bmap[] = {
 	{"",					171, Mapper171_Init},
 	{"",					172, Mapper172_Init},
 	{"",					173, Mapper173_Init},
-//	{"",					174, Mapper174_Init},
+	{"NTDec 5-in-1",		174, Mapper174_Init},
 	{"",					175, Mapper175_Init},
 	{"BMCFK23C",			176, BMCFK23C_Init},	// zero 26-may-2012 - well, i have some WXN junk games that use 176 for instance ????. i dont know what game uses this BMCFK23C as mapper 176. we'll have to make a note when we find it.
 	{"",					177, Mapper177_Init},
diff --git a/src/ines.h b/src/ines.h
index f1b0d231..04e723d7 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -208,6 +208,7 @@ void Mapper170_Init(CartInfo *);
 void Mapper171_Init(CartInfo *);
 void Mapper172_Init(CartInfo *);
 void Mapper173_Init(CartInfo *);
+void Mapper174_Init(CartInfo *);
 void Mapper175_Init(CartInfo *);
 void Mapper177_Init(CartInfo *);
 void Mapper178_Init(CartInfo *);