From 1d876ffec444b04c81681e1f8f3417cc262a2208 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Sun, 8 Feb 2026 12:34:44 +0100
Subject: [PATCH] Added mapper 609.

---
 src/boards/609.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 66 insertions(+)
 create mode 100644 src/boards/609.c

diff --git a/src/boards/609.c b/src/boards/609.c
new file mode 100644
index 0000000..6883d8d
--- /dev/null
+++ b/src/boards/609.c
@@ -0,0 +1,64 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2026 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"
+
+static uint8 reg;
+
+static void sync () {
+	int bank;
+	for (bank = 0x8000; bank <= 0xF000; bank += 0x2000) {
+		int val = reg;
+		if (reg &0x20) val = val &~0x01 | bank >>13 &1;
+		if (reg &0x40) val = val &~0x02 | bank >>13 &2;
+		setprg8(bank, val);
+	}
+	setchr8(0);
+	setmirror(reg &0x80? MI_H: MI_V);
+}
+
+static DECLFW (writeReg) {
+	if (A &0x100) {
+		reg = V;
+		sync();
+	}
+}
+
+static void reset () {
+	reg = 0;
+	sync();
+}
+
+static void power () {
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x4020, 0x5FFF, writeReg);
+	reset();
+}
+
+static void stateRestore (int version) {
+	sync();
+}
+
+void Mapper609_Init (CartInfo *info) {
+	info->Power = power;
+	info->Reset = reset;
+	GameStateRestore = stateRestore;
+	AddExState(&reg, 1, 0, "REGS");
+}
diff --git a/src/ines.c b/src/ines.c
index c352fe5..b22f501 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -1026,6 +1026,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "New Star T4IN1",           606, Mapper606_Init         )
 	INES_BOARD( "4705",                     607, Mapper607_Init         )
 	INES_BOARD( "A-23",                     608, Mapper608_Init         )
+	INES_BOARD( "63-100",                   609, Mapper609_Init         )
 INES_BOARD_END()
 
 static uint32 iNES_get_mapper_id(void)
diff --git a/src/ines.h b/src/ines.h
index a09cdb2..44067a4 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -495,6 +495,7 @@ void Mapper605_Init(CartInfo *);
 void Mapper606_Init(CartInfo *);
 void Mapper607_Init(CartInfo *);
 void Mapper608_Init(CartInfo *);
+void Mapper609_Init(CartInfo *);
 void FFE_Init(CartInfo *);
 
 #endif