diff --git a/src/boards/494.c b/src/boards/494.c
new file mode 100644
index 0000000..7820751
--- /dev/null
+++ b/src/boards/494.c
@@ -0,0 +1,61 @@
+/* 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 uint8 pad;
+
+static DECLFR(readOB) {
+	return X.DB;
+}
+
+static void sync () {
+	if (Latch_address &0x100) {
+		if (Latch_address &0x001) {
+			setprg16(0x8000, Latch_address >>2);
+			setprg16(0xC000, Latch_address >>2);
+		} else
+			setprg32(0x8000, Latch_address >>3);
+	} else {
+		setprg16(0x8000, Latch_address >>2);
+		setprg16(0xC000, Latch_address >>2 |7);
+	}
+	setchr8(Latch_address >>5 &7 | Latch_address >>1 &8);
+	setmirror(Latch_address &0x002? MI_H: MI_V);
+	SetReadHandler(0x8000, 0xFFFF, ~Latch_address &0x100 && Latch_address &0x001 &pad? readOB: CartBR);
+}
+
+static void power() {
+	pad = 0;
+	Latch_power();
+}
+
+static void reset() {
+	pad++;
+	Latch_clear();
+}
+
+void Mapper494_Init (CartInfo *info) {
+	Latch_init(info, sync, 0x8000, 0xFFFF, NULL);
+	info->Power = power;
+	info->Reset = reset;
+	AddExState(&pad, 1, 0, "DIPS");
+}
diff --git a/src/ines.c b/src/ines.c
index 2564ed3..593ac88 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -909,6 +909,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "KS7009",         		486, Mapper486_Init         )
 	INES_BOARD( "AVE NINA-08",    		487, Mapper487_Init         )
 	INES_BOARD( "HC001",    		488, Mapper488_Init         )
+	INES_BOARD( "CH512K/OK-103",            494, Mapper494_Init         )
 	INES_BOARD( "K-3011",                   498, Mapper498_Init         )
 	INES_BOARD( "FC-41",                    499, Mapper499_Init         )
 	INES_BOARD( "Yhc-000",                  500, Mapper500_Init         )
diff --git a/src/ines.h b/src/ines.h
index 805cb7b..2683ea9 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -389,6 +389,7 @@ void Mapper485_Init(CartInfo *);
 void Mapper486_Init(CartInfo *);
 void Mapper487_Init(CartInfo *);
 void Mapper488_Init(CartInfo *);
+void Mapper494_Init(CartInfo *);
 void Mapper498_Init(CartInfo *);
 void Mapper499_Init(CartInfo *);
 void Mapper500_Init(CartInfo *);