From 81cfd57103ef88a4055468431d46258e375795bd Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Fri, 12 Sep 2025 11:57:48 +0200
Subject: [PATCH] Add mapper 182 (replacing the duplicate of 114).

---
 src/boards/182.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  2 +-
 src/ines.h       |  1 +
 3 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 src/boards/182.c

diff --git a/src/boards/182.c b/src/boards/182.c
new file mode 100644
index 0000000..a1cd4ba
--- /dev/null
+++ b/src/boards/182.c
@@ -0,0 +1,75 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020
+ *
+ * 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_mmc3.h"
+
+static uint8 reg[4];
+
+static void sync() {
+	int prgAND = reg[1] &0x20? 0x1F: 0x0F;
+	int chrAND = reg[1] &0x40? 0xFF: 0x7F;
+	int prgOR = (reg[1] &0x02? 0x10: 0x00) | (reg[1] &0x10? 0x020: 0x00);
+	int chrOR = (reg[1] &0x02? 0x80: 0x00) | (reg[1] &0x10? 0x100: 0x00);
+	if (reg[0] &0x80) {
+		if (reg[0] &0x20)
+			setprg32(0x8000, reg[0] >>1);
+		else {
+			setprg16(0x8000, reg[0]);
+			setprg16(0xC000, reg[0]);
+		}
+	} else
+		MMC3_syncPRG(prgAND, prgOR &~prgAND);
+	MMC3_syncCHR(chrAND, chrOR &~chrAND);
+	MMC3_syncMirror();
+}
+
+static DECLFW(writeReg) {
+	if (~reg[1] &0x01) {
+		reg[A &3] = V;
+		sync();
+	}
+}
+
+static DECLFW(unscramble) {
+	static const uint16 lutAddress[8] = { 0xA001, 0xA000, 0x8000, 0xC000, 0x8001, 0xC001, 0xE000, 0xE001 }; /* i <5? 4-i: i */
+	static const uint8 lutIndex[8] = { 0, 3, 1, 5, 6, 7, 2, 4 }; /* i <6? (i^3)-1: i */
+	MMC3_writeReg(lutAddress[A >>12 &6 | A &1], (A &0xE001) == 0xA000? lutIndex[V &7]: V);
+}
+
+static void reset() {
+	reg[0] = reg[1] = reg[2] = reg[3] = 0;
+	MMC3_clear();
+}
+
+static void power() {
+	reg[0] = reg[1] = reg[2] = reg[3] = 0;
+	MMC3_power();
+	SetWriteHandler(0x8000, 0xFFFF, unscramble);
+}
+
+void Mapper182_Init(CartInfo *info) {
+	MMC3_init(info, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, writeReg);
+	info->Power = power;
+	info->Reset = reset;
+	AddExState(reg, 4, 0, "EXPR");
+}
diff --git a/src/ines.c b/src/ines.c
index 70222f9..149449f 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -635,7 +635,7 @@ INES_BOARD_BEGIN()
 /*    INES_BOARD( "",                            179, Mapper179_Init ) */
 	INES_BOARD( "",                         180, Mapper180_Init         )
 	INES_BOARD( "",                         181, Mapper181_Init         )
-/*    INES_BOARD( "",                            182, Mapper182_Init ) */    /* Deprecated, dupe of Mapper 114 */
+        INES_BOARD( "YH-001",                   182, Mapper182_Init         )
 	INES_BOARD( "",                         183, Mapper183_Init         )
 	INES_BOARD( "",                         184, Mapper184_Init         )
 	INES_BOARD( "",                         185, Mapper185_Init         )
diff --git a/src/ines.h b/src/ines.h
index a56fd6b..c58d527 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -187,6 +187,7 @@ void Mapper177_Init(CartInfo *);
 void Mapper178_Init(CartInfo *);
 void Mapper180_Init(CartInfo *);
 void Mapper181_Init(CartInfo *);
+void Mapper182_Init(CartInfo *);
 void Mapper183_Init(CartInfo *);
 void Mapper184_Init(CartInfo *);
 void Mapper185_Init(CartInfo *);