diff --git a/src/boards/483.c b/src/boards/483.c
new file mode 100644
index 0000000..d033363
--- /dev/null
+++ b/src/boards/483.c
@@ -0,0 +1,79 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020
+ *
+ * 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
+ *
+ *
+ */
+
+/* 3927 PCB, reset-based MMC1/CNROM multicart. The common dump with mapper number 3927 has an unrealistic bank order. */
+
+#include "mapinc.h"
+#include "asic_latch.h"
+#include "asic_mmc1.h"
+
+static uint8 game;
+
+static void sync_SLROM () {
+	MMC1_syncPRG(0x07, game <<3);
+	MMC1_syncCHR(0x1F, game <<5);
+	MMC1_syncMirror();
+}
+
+static void sync_CNROM () {
+	setprg32(0x8000, 0x0C +game -3);
+	setchr8(0x30 | (game -3) <<2 | Latch_data &0x03);
+	setmirror(MI_V);
+}
+
+static void sync_SEROM () {
+	setprg32(0x8000, 0x0F);
+	MMC1_syncCHR(0x07, 0x78);
+	MMC1_syncMirror();
+}
+
+static void applyMode (uint8 clear) {
+	if (game <= 2)
+		MMC1_activate(clear, sync_SLROM, MMC1_TYPE_MMC1B, NULL, NULL, NULL, NULL);
+	else
+	if (game <= 5)
+		Latch_activate(clear, sync_CNROM, 0x8000, 0xFFFF, NULL);
+	else
+		MMC1_activate(clear, sync_SEROM, MMC1_TYPE_MMC1B, NULL, NULL, NULL, NULL);
+}
+
+static void reset () {
+	if (++game >=7) game = 0;
+	applyMode(1);
+}
+
+static void power () {
+	game = 0;
+	applyMode(1);
+}
+
+static void stateRestore(int version) {
+	applyMode(0);
+}
+void Mapper483_Init (CartInfo *info) {
+	AddExState(&game, 1, 0, "GAME");
+	Latch_addExState();
+	MMC1_addExState();
+	info->Power = power;
+	info->Reset = reset;
+	GameStateRestore = stateRestore;
+}
diff --git a/src/ines.c b/src/ines.c
index 5f86258..14cb968 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -912,6 +912,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "480",   		     	480, Mapper480_Init         )
 	INES_BOARD( "045N",          		481, Mapper481_Init         )
 	INES_BOARD( "K-1079",          		482, Mapper482_Init         )
+	INES_BOARD( "3927",            		483, Mapper483_Init         )
 	INES_BOARD( "ESTIQUE",         		484, Mapper484_Init         )
 	INES_BOARD( "0359",         		485, Mapper485_Init         )
 	INES_BOARD( "KS7009",         		486, Mapper486_Init         )
diff --git a/src/ines.h b/src/ines.h
index 36f1d25..e179c7f 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -393,6 +393,7 @@ void Mapper478_Init(CartInfo *);
 void Mapper480_Init(CartInfo *);
 void Mapper481_Init(CartInfo *);
 void Mapper482_Init(CartInfo *);
+void Mapper483_Init(CartInfo *);
 void Mapper484_Init(CartInfo *);
 void Mapper485_Init(CartInfo *);
 void Mapper486_Init(CartInfo *);