From 988be84742eeac6b82891759bb4edcd489cd185e Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Wed, 27 Jul 2022 11:07:25 +0200
Subject: [PATCH] Add mapper 441

---
 src/boards/441.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 70 insertions(+)
 create mode 100644 src/boards/441.c

diff --git a/src/boards/441.c b/src/boards/441.c
new file mode 100644
index 0000000..a2ef809
--- /dev/null
+++ b/src/boards/441.c
@@ -0,0 +1,68 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022
+ *
+ * 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
+ */
+
+/* 850335C PCB */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static void Mapper441_PRGWrap(uint32 A, uint8 V) {
+	int prgAND =EXPREGS[0] &0x08? 0x0F: 0x1F;
+	int prgOR  =EXPREGS[0] <<4 &0x30;
+	if (EXPREGS[0] &0x04) {
+		if (~A &0x4000) {
+			setprg8(A,         ~2 &V &prgAND | prgOR &~prgAND);
+			setprg8(A |0x4000,  2 |V &prgAND | prgOR &~prgAND);
+		}
+	} else
+		setprg8(A, V &prgAND | prgOR &~prgAND);
+}
+
+static void Mapper441_CHRWrap(uint32 A, uint8 V) {
+	int chrAND =EXPREGS[0] &0x40? 0x7F: 0xFF;
+	int chrOR  =EXPREGS[0] <<3 &0x180;
+	setchr1(A, V &chrAND | chrOR &~chrAND);
+}
+
+static DECLFW(Mapper441_Write) {
+	if (~EXPREGS[0] &0x80) EXPREGS[0] =V;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static void Mapper441_Reset(void) {
+	EXPREGS[0] =0;
+	MMC3RegReset();
+}
+
+static void Mapper441_Power(void) {
+	EXPREGS[0] =0;
+	GenMMC3Power();
+	SetWriteHandler(0x6000, 0x7FFF, Mapper441_Write);
+}
+
+void Mapper441_Init(CartInfo *info) {
+	GenMMC3_Init(info, 256, 256, 0, 0);
+	cwrap = Mapper441_CHRWrap;
+	pwrap = Mapper441_PRGWrap;
+	info->Power = Mapper441_Power;
+	info->Reset = Mapper441_Reset;
+	AddExState(EXPREGS, 1, 0, "EXPR");
+}
diff --git a/src/ines.c b/src/ines.c
index 71070ff..2fb19e3 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -815,6 +815,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "820401/T-217",             436, Mapper436_Init         )
 	INES_BOARD( "NTDEC TH2348",             437, Mapper437_Init         )
 	INES_BOARD( "K-3071",                   438, Mapper438_Init         )
+	INES_BOARD( "850335C",                  441, Mapper441_Init         )
 	INES_BOARD( "NC-3000M",                 443, Mapper443_Init         )
 	INES_BOARD( "NC-7000M/NC-8000M",        444, Mapper444_Init         )
 	INES_BOARD( "DS-9-27",                  452, Mapper452_Init         )
diff --git a/src/ines.h b/src/ines.h
index 92ad140..4d0a91b 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -323,6 +323,7 @@ void Mapper435_Init(CartInfo *);
 void Mapper436_Init(CartInfo *);
 void Mapper437_Init(CartInfo *);
 void Mapper438_Init(CartInfo *);
+void Mapper441_Init(CartInfo *);
 void Mapper443_Init(CartInfo *);
 void Mapper444_Init(CartInfo *);
 void Mapper452_Init(CartInfo *);