diff --git a/src/boards/bmcl6in1.c b/src/boards/bmcl6in1.c
new file mode 100644
index 0000000..f788537
--- /dev/null
+++ b/src/boards/bmcl6in1.c
@@ -0,0 +1,74 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2019 Libretro Team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/* NES 2.0 Mapper 345
+ * BMC-L6IN1
+ * New Star 6-in-1 Game Cartridge
+ * https://wiki.nesdev.com/w/index.php/NES_2.0_Mapper_345
+ */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static void BMCL6IN1CW(uint32 A, uint8 V) {
+	setchr8(V);
+}
+
+static void BMCL6IN1PW(uint32 A, uint8 V) {
+	if (EXPREGS[0] & 0x0C)
+		setprg8(A, (V & 0x0F) | (EXPREGS[0] & 0xC0) >> 2);
+	else
+		setprg32(0x8000, ((EXPREGS[0] & 0xC0) >> 4) | (EXPREGS[0] & 0x03));
+}
+
+static void BMCL6IN1MW(uint8 V) {
+	if (EXPREGS[0] & 0x20)
+		setmirror(MI_0 + ((EXPREGS[0] & 0x10) >> 1));
+	else {
+		A000B = V;
+		setmirror((V & 1) ^ 1);
+	}
+}
+
+static DECLFW(BMCL6IN1Write) {
+	EXPREGS[0] = V;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static void BMCL6IN1Reset(void) {
+	EXPREGS[0] = 0;
+	MMC3RegReset();
+}
+
+static void BMCL6IN1Power(void) {
+	GenMMC3Power();
+	SetWriteHandler(0x6000, 0x7FFF, BMCL6IN1Write);
+}
+
+void BMCL6IN1_Init(CartInfo *info) {
+	GenMMC3_Init(info, 512, 0, 1, 0);
+	pwrap = BMCL6IN1PW;
+	cwrap = BMCL6IN1CW;
+	mwrap = BMCL6IN1MW;
+	info->Power = BMCL6IN1Power;
+	info->Reset = BMCL6IN1Reset;
+	AddExState(EXPREGS, 1, 0, "EXPR");
+}
diff --git a/src/unif.c b/src/unif.c
index c2f4b89..a918888 100644
--- a/src/unif.c
+++ b/src/unif.c
@@ -498,6 +498,7 @@ static BMAPPING bmap[] = {
 	{ " BMC-STREETFIGTER-GAME4IN1", BMCSFGAME4IN1_Init, 0 },
 	{ "G631", BMCGhostbusters63in1_Init, 0 },
 	{ "BJ-56", UNLBJ56_Init, 0 },
+	{ "L6IN1", BMCL6IN1_Init, 0 },
 
 #ifdef COPYFAMI
 	{ "COPYFAMI_MMC3", MapperCopyFamiMMC3_Init, 0 },
diff --git a/src/unif.h b/src/unif.h
index d2111b3..a378f12 100644
--- a/src/unif.h
+++ b/src/unif.h
@@ -183,6 +183,7 @@ void UNLAX40G_Init(CartInfo *info);			/* m527 */
 void BMCK3088_Init(CartInfo *info);			/* m287 */
 void BMCSFGAME4IN1_Init(CartInfo *info);	/* m049 */
 void UNLBJ56_Init(CartInfo *info);			/* m526 */
+void BMCL6IN1_Init(CartInfo *info);			/* m345 */
 
 #ifdef COPYFAMI
 void MapperCopyFamiMMC3_Init(CartInfo *info);