From fc7913403ac71b43d4ed21258747d7817f4a39fd Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Thu, 24 Apr 2025 22:18:39 +0200
Subject: [PATCH] Add mapper 399.

---
 src/boards/399.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 78 insertions(+)
 create mode 100644 src/boards/399.c

diff --git a/src/boards/399.c b/src/boards/399.c
new file mode 100644
index 0000000..644680f
--- /dev/null
+++ b/src/boards/399.c
@@ -0,0 +1,76 @@
+/* FCEUmm - 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 "mmc3.h"
+
+static uint8 submapper;
+
+static void PRGWrap(uint32 A, uint8 V) {
+	if (submapper ==1) {
+		setprg8(0x6000, ~1);
+		setprg8(0x8000, DRegBuf[6] <<1 |0);
+		setprg8(0xA000, DRegBuf[6] <<1 |1);
+	} else {
+		setprg8(0x8000, 0);
+		setprg8(0xA000, DRegBuf[6]);		
+	}
+	setprg8(0xC000, DRegBuf[7]);
+	setprg8(0xE000, ~0);
+}
+
+static void CHRWrap(uint32 A, uint8 V) {
+	setchr4(0x0000, DRegBuf[0]);
+	setchr4(0x1000, DRegBuf[1]);
+}
+
+static DECLFW(writeReg) {
+	if (submapper ==1) A =(A +0x2000) &0xFFFF | 0x8000;
+	switch(A &0xE001) {
+		case 0x8000:
+			DRegBuf[V >>7 |0] =V;
+			FixMMC3CHR(MMC3_cmd);
+			break;
+		case 0x8001:
+			DRegBuf[V >>7 |6] =V;
+			FixMMC3PRG(MMC3_cmd);
+			break;
+		case 0xA000: case 0xA001:
+			MMC3_CMDWrite(A, V);
+			break;
+		case 0xC000: case 0xC001: case 0xE000: case 0xE001:
+			MMC3_IRQWrite(A, V);
+			break;
+	}
+}
+
+static void power(void) {
+	GenMMC3Power();
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, writeReg);
+}
+
+void Mapper399_Init(CartInfo *info) {
+	submapper =info->submapper;
+	GenMMC3_Init(info, 256, 32, info->iNES2? (info->PRGRamSize + info->PRGRamSaveSize) /1024: 8, info->battery);
+	cwrap =CHRWrap;
+	pwrap =PRGWrap;
+	info->Power =power;
+}
diff --git a/src/ines.c b/src/ines.c
index 29d8b70..db14133 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -835,6 +835,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "YY850437C",                396, Mapper396_Init         )
 	INES_BOARD( "YY850439C",                397, Mapper397_Init         )
 	INES_BOARD( "YY840820C",                398, Mapper398_Init         )
+	INES_BOARD( "BATMAP-000",               399, Mapper399_Init         )
 	INES_BOARD( "BMC Super 19-in-1 (VIP19)",401, Mapper401_Init         )
 	INES_BOARD( "831019C J-2282",           402, J2282_Init             )
 	INES_BOARD( "89433",                    403, Mapper403_Init         )
diff --git a/src/ines.h b/src/ines.h
index 7fc4c35..3cbf80f 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -315,6 +315,7 @@ void Mapper395_Init(CartInfo *);
 void Mapper396_Init(CartInfo *);
 void Mapper397_Init(CartInfo *);
 void Mapper398_Init(CartInfo *);
+void Mapper399_Init(CartInfo *);
 void Mapper401_Init(CartInfo *);
 void Mapper403_Init(CartInfo *);
 void Mapper404_Init(CartInfo *);