diff --git a/src/boards/378.c b/src/boards/378.c
new file mode 100644
index 0000000..8e595d0
--- /dev/null
+++ b/src/boards/378.c
@@ -0,0 +1,39 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2025 NewRisingSun
+ *
+ * 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 "asic_latch.h"
+
+static void sync () {
+	if (Latch_data &0x20) {
+		setprg16(0x8000, 0x10 | Latch_data <<1 &0x0E | Latch_data >>3 &0x01);
+		setprg16(0xC000, 0x10 | Latch_data <<1 &0x0E |                 0x07);
+		setmirror(Latch_data &0x04? MI_H: MI_V);
+	} else {
+		setprg32(0x8000, Latch_data &0x07);
+		setmirror(Latch_data &0x10? MI_1: MI_0);
+	}
+	setchr8(0);
+}
+
+void Mapper378_Init (CartInfo *info) {
+	Latch_init(info, sync, 0x8000, 0xFFFF, NULL);
+	info->Reset = Latch_clear;
+}
diff --git a/src/ines.c b/src/ines.c
index 8e98837..fba0f83 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -820,6 +820,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "135-in-1",                 375, Mapper375_Init         )
 	INES_BOARD( "YY841155C",                376, Mapper376_Init         )
 	INES_BOARD( "JY-111/JY-112",            377, Mapper377_Init         )
+	INES_BOARD( "8-in-1 AOROM+UNROM",       378, Mapper378_Init         )
 	INES_BOARD( "42 to 80,000 (970630C)",   380, Mapper380_Init         )
 	INES_BOARD( "KN-42",                    381, Mapper381_Init         )
 	INES_BOARD( "830928C",                  382, Mapper382_Init         )
diff --git a/src/ines.h b/src/ines.h
index ee6f074..6c78cb4 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -302,6 +302,7 @@ void Mapper374_Init(CartInfo *);
 void Mapper375_Init(CartInfo *);
 void Mapper376_Init(CartInfo *);
 void Mapper377_Init(CartInfo *);
+void Mapper378_Init(CartInfo *);
 void Mapper380_Init(CartInfo *);
 void Mapper381_Init(CartInfo *);
 void Mapper382_Init(CartInfo *);