diff --git a/src/boards/82.c b/src/boards/82_552.c
similarity index 82%
rename from src/boards/82.c
rename to src/boards/82_552.c
index fd71c75..5ed4d6b 100644
--- a/src/boards/82.c
+++ b/src/boards/82_552.c
@@ -26,6 +26,7 @@
 static uint8 regs[9], ctrl;
 static uint8 *WRAM = NULL;
 static uint32 WRAMSIZE;
+static uint8 is552;
 
 static SFORMAT StateRegs[] =
 {
@@ -34,6 +35,13 @@ static SFORMAT StateRegs[] =
 	{ 0 }
 };
 
+uint8 prgBits (uint8 val) {
+	if (is552)
+		return val >>5 &0x01 | val >>3 &0x02 | val >>1 &0x04 | val <<1 &0x08 | val <<3 &0x10 | val <<5 &0x20;
+	else
+		return val >>2;
+}
+
 static void Sync(void) {
 	uint32 swap = ((ctrl & 2) << 11);
 	setchr2(0x0000 ^ swap, regs[0] >> 1);
@@ -43,9 +51,9 @@ static void Sync(void) {
 	setchr1(0x1800 ^ swap, regs[4]);
 	setchr1(0x1c00 ^ swap, regs[5]);
 	setprg8r(0x10, 0x6000, 0);
-	setprg8(0x8000, regs[6]);
-	setprg8(0xA000, regs[7]);
-	setprg8(0xC000, regs[8]);
+	setprg8(0x8000, prgBits(regs[6]));
+	setprg8(0xA000, prgBits(regs[7]));
+	setprg8(0xC000, prgBits(regs[8]));
 	setprg8(0xE000, ~0);
 	setmirror(ctrl & 1);
 }
@@ -56,9 +64,9 @@ static DECLFW(M82Write) {
 	else
 		switch (A) {
 		case 0x7ef6: ctrl = V & 3; break;
-		case 0x7efa: regs[6] = V >> 2; break;
-		case 0x7efb: regs[7] = V >> 2; break;
-		case 0x7efc: regs[8] = V >> 2; break;
+		case 0x7efa: regs[6] = V; break;
+		case 0x7efb: regs[7] = V; break;
+		case 0x7efc: regs[8] = V; break;
 		}
 	Sync();
 }
@@ -82,6 +90,7 @@ static void StateRestore(int version) {
 }
 
 void Mapper82_Init(CartInfo *info) {
+	is552 = 0;
 	info->Power = M82Power;
 	info->Close = M82Close;
 
@@ -96,3 +105,8 @@ void Mapper82_Init(CartInfo *info) {
 	GameStateRestore = StateRestore;
 	AddExState(&StateRegs, ~0, 0, 0);
 }
+
+void Mapper552_Init(CartInfo *info) {
+	Mapper82_Init(info);
+	is552 = 1;
+}
diff --git a/src/ines.c b/src/ines.c
index f1fceb1..5d8a1b2 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -961,6 +961,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "WAIXING FS306",            544, Mapper544_Init         )
 	INES_BOARD( "",                         550, Mapper550_Init         )
 	INES_BOARD( "",              		551, Mapper178_Init         )
+	INES_BOARD( "TAITO X1-017",             552, Mapper552_Init         )
 	INES_BOARD( "SACHEN 3013",              553, Mapper553_Init         )
 	INES_BOARD( "KS-7010",                  554, Mapper554_Init         )
 	INES_BOARD( "",                  	555, Mapper555_Init         )
diff --git a/src/ines.h b/src/ines.h
index 6258ca9..e7fd9f1 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -429,6 +429,7 @@ void Mapper542_Init(CartInfo *);
 void Mapper543_Init(CartInfo *);
 void Mapper544_Init(CartInfo *);
 void Mapper550_Init(CartInfo *);
+void Mapper552_Init(CartInfo *);
 void Mapper553_Init(CartInfo *);
 void Mapper554_Init(CartInfo *);
 void Mapper555_Init(CartInfo *);