From a5df7359bc861131853259175373555a6feb1db3 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Tue, 10 Mar 2026 19:37:22 +0100
Subject: [PATCH] Add mapper 615.

---
 src/boards/615.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 72 insertions(+)
 create mode 100644 src/boards/615.c

diff --git a/src/boards/615.c b/src/boards/615.c
new file mode 100644
index 0000000..da373d1
--- /dev/null
+++ b/src/boards/615.c
@@ -0,0 +1,70 @@
+/* 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[3];
+
+static void sync () {
+	int prg = reg[0] &0x34 | reg[1] <<3 &0x08;
+	if (reg[0] &0x08) {
+		if (reg[0] &0x20 && reg[1] &0x01) {
+			setprg16(0x8000, prg &0x3C | reg[2] &0x03);
+			setprg16(0xC000, prg &0x3C |         0x03);
+		} else {
+			setprg16(0x8000, prg &0x38 | reg[2] &0x07);
+			setprg16(0xC000, prg &0x38 |         0x07);
+		}
+	} else
+		setprg32(0x8000, prg >>1 &0x1C | reg[0] >>1 &0x03);
+	setchr8(0);
+	setmirror(reg[0] &0x80? MI_H: MI_V);
+}
+
+static DECLFW (writeReg) {
+	if (A < 0x8000) {
+		reg[0] = V;
+		reg[1] = A &0xFF;
+	} else
+		reg[2] = V;
+	sync();
+}
+
+static void reset () {
+	reg[0] = reg[1] = reg[2] = 0;
+	sync();
+}
+
+static void power () {
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x6000, 0xFFFF, writeReg);
+	reset();
+}
+
+static void stateRestore (int version) {
+	sync();
+}
+
+void Mapper615_Init (CartInfo *info) {
+	info->Power = power;
+	info->Reset = reset;
+	GameStateRestore = stateRestore;
+	AddExState(reg, 3, 0, "REGS");
+}
diff --git a/src/ines.c b/src/ines.c
index beeb6e0..dd417a0 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -1032,6 +1032,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "K-3004",                   612, Mapper612_Init         )
 	INES_BOARD( "S5668 3366",               613, Mapper613_Init         )
 	INES_BOARD( "New Star 9135",            614, Mapper614_Init         )
+	INES_BOARD( "LB12in1",                  615, Mapper615_Init         )
 	INES_BOARD( "K-3044",                   616, Mapper616_Init         )
 INES_BOARD_END()
 
diff --git a/src/ines.h b/src/ines.h
index 9b7fafa..d1fe952 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -501,6 +501,7 @@ void Mapper611_Init(CartInfo *);
 void Mapper612_Init(CartInfo *);
 void Mapper613_Init(CartInfo *);
 void Mapper614_Init(CartInfo *);
+void Mapper615_Init(CartInfo *);
 void Mapper616_Init(CartInfo *);
 void FFE_Init(CartInfo *);