diff --git a/src/boards/450.c b/src/boards/450.c
new file mode 100644
index 0000000..990c651
--- /dev/null
+++ b/src/boards/450.c
@@ -0,0 +1,38 @@
+/* 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 "vrc2and4.h"
+
+static void sync () {
+	VRC24_syncPRG(0x0F, VRC2_pins <<4);
+	VRC24_syncCHR(0x7F, VRC2_pins <<7);
+	VRC24_syncMirror();
+}
+
+void Mapper450_reset(void) {
+	VRC2_pins =0;
+	VRC24_Sync();
+}	
+
+void Mapper450_Init (CartInfo *info) {
+	VRC24_init(info, sync, 0x01, 0x02, 0, 0, 0);
+	info->Reset =Mapper450_reset;
+}
diff --git a/src/boards/vrc2and4.c b/src/boards/vrc2and4.c
index 721e63e..fa5a0f3 100644
--- a/src/boards/vrc2and4.c
+++ b/src/boards/vrc2and4.c
@@ -120,8 +120,10 @@ DECLFW(VRC24_wramWrite) {
 	if (WRAMSize)
 		CartBW(((A -0x6000) &(WRAMSize -1)) +0x6000, V);
 	else
-	if (!VRC24_isVRC4)
+	if (!VRC24_isVRC4) {
 		VRC2_pins =V;
+		VRC24_Sync();
+	}
 	
 	if (VRC24_WRAMWrite)
 		VRC24_WRAMWrite(A, V);
diff --git a/src/ines.c b/src/ines.c
index 791d68b..5e034cb 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -837,9 +837,10 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "KL-06",                    447, Mapper447_Init         )
 	INES_BOARD( "830768C",                  448, Mapper448_Init         )
 	INES_BOARD( "22-in-1 King Series",      449, Mapper449_Init         )
+	INES_BOARD( "晶太 YY841157C",          	450, Mapper450_Init         )
 	INES_BOARD( "DS-9-27",                  452, Mapper452_Init         )
 	INES_BOARD( "Realtec 8042",    		453, Mapper453_Init         )
-	INES_BOARD( "110-in-1",     		454, Mapper454_Init )
+	INES_BOARD( "110-in-1",     		454, Mapper454_Init         )
 	INES_BOARD( "N625836",                  455, Mapper455_Init         )
 	INES_BOARD( "K6C3001A",                 456, Mapper456_Init         )
 	INES_BOARD( "810431C",                  457, Mapper457_Init         )
diff --git a/src/ines.h b/src/ines.h
index 314b476..d54c85f 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -348,6 +348,7 @@ void Mapper445_Init(CartInfo *);
 void Mapper447_Init(CartInfo *);
 void Mapper448_Init(CartInfo *);
 void Mapper449_Init(CartInfo *);
+void Mapper450_Init(CartInfo *);
 void Mapper452_Init(CartInfo *);
 void Mapper453_Init(CartInfo *);
 void Mapper454_Init(CartInfo *);