diff --git a/src/boards/81.c b/src/boards/81.c
new file mode 100644
index 00000000..48c9b473
--- /dev/null
+++ b/src/boards/81.c
@@ -0,0 +1,32 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2023
+ *
+ * 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
+ */
+
+#include "mapinc.h"
+#include "latch.h"
+
+static void Sync(void) {
+	setprg16(0x8000, (latch.addr >> 2) & 3);
+    setprg16(0xC000, ~0);
+	setchr8(latch.data & 3);
+}
+
+void Mapper81_Init(CartInfo *info) {
+	Latch_Init(info, Sync, NULL, 0, 0);
+}
diff --git a/src/ines.c b/src/ines.c
index 5982e558..9029fdab 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -502,7 +502,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Irem 74HC161/32",           78, Mapper78_Init          )
 	INES_BOARD( "AVE/C&E/TXC BOARD",         79, Mapper79_Init          )
 	INES_BOARD( "TAITO X1-005 Rev. A",       80, Mapper80_Init          )
-/*    INES_BOARD( "",                             81, Mapper81_Init ) */
+	INES_BOARD( "Super Gun (NTDEC N715021)", 81, Mapper81_Init )
 	INES_BOARD( "TAITO X1-017",              82, Mapper82_Init          )
 	INES_BOARD( "YOKO VRC Rev. B",           83, Mapper83_Init          )
 /*    INES_BOARD( "",                            84, Mapper84_Init ) */
diff --git a/src/ines.h b/src/ines.h
index fa28a07d..5bafd8fc 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -116,6 +116,7 @@ void Mapper77_Init(CartInfo *);
 void Mapper78_Init(CartInfo *);
 void Mapper79_Init(CartInfo *);
 void Mapper80_Init(CartInfo *);
+void Mapper81_Init(CartInfo *);
 void Mapper82_Init(CartInfo *);
 void Mapper83_Init(CartInfo *);
 void Mapper85_Init(CartInfo *);