From 9ad7a68cf382b2eec8d90cc8a4a9a3aa029c630f Mon Sep 17 00:00:00 2001
From: libretroadmin <reallibretroretroarch@gmail.com>
Date: Sun, 9 Jun 2024 18:37:35 +0200
Subject: [PATCH] Add mapper 458

---
 src/boards/458.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 75 insertions(+)
 create mode 100644 src/boards/458.c

diff --git a/src/boards/458.c b/src/boards/458.c
new file mode 100644
index 0000000..cb7ba5b
--- /dev/null
+++ b/src/boards/458.c
@@ -0,0 +1,73 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2023
+ *
+ * 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 void M458CW(uint32 A, uint8 V) {
+	setchr1(A, ((EXPREGS[0] << 4) & ~0x7F) | (V & 0x7F));
+}
+
+static void M458PW(uint32 A, uint8 V) {
+	if (EXPREGS[0] & 0x10) {
+		setprg32(0x8000, EXPREGS[0] >> 1);
+	} else {
+		setprg16(0x8000, EXPREGS[0]);
+		setprg16(0xC000, EXPREGS[0]);
+	}
+}
+
+static DECLFR(M458Read) {
+	if ((EXPREGS[0] & 0x20) && (EXPREGS[1] & 3)) {
+		return CartBR((A & ~3) | (EXPREGS[1] & 3));
+	}
+	return CartBR(A);
+}
+
+static DECLFW(M458Write) {
+	if (MMC3CanWriteToWRAM()) {
+		EXPREGS[0] = A & 0xFF;
+		FixMMC3PRG(MMC3_cmd);
+		FixMMC3CHR(MMC3_cmd);
+	}
+}
+
+static void M458Reset(void) {
+	EXPREGS[0] = 0;
+	EXPREGS[1]++;
+	MMC3RegReset();
+}
+
+static void M458Power(void) {
+	EXPREGS[0] = 0;
+	EXPREGS[1] = 0;
+	GenMMC3Power();
+	SetReadHandler(0x8000, 0xFFFF, M458Read);
+	SetWriteHandler(0x6000, 0x7FFF, M458Write);
+}
+
+void Mapper458_Init(CartInfo *info) {
+	GenMMC3_Init(info, 256, 256, 0, 0);
+	cwrap = M458CW;
+	pwrap = M458PW;
+	info->Reset = M458Reset;
+	info->Power = M458Power;
+	AddExState(EXPREGS, 2, 0, "EXPR");
+}
diff --git a/src/ines.c b/src/ines.c
index 0755b20..8bf3474 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -832,6 +832,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "N625836",                  455, Mapper455_Init         )
 	INES_BOARD( "K6C3001A",                 456, Mapper456_Init         )
 	INES_BOARD( "810431C",                  457, Mapper457_Init         )
+	INES_BOARD( "",                  	458, Mapper458_Init         )
 	INES_BOARD( "8-in-1",                   459, Mapper459_Init         )
 	INES_BOARD( "FC-29-40/K-3101",        	460, Mapper460_Init         )
 	INES_BOARD( "0324",                 	461, Mapper461_Init         )
diff --git a/src/ines.h b/src/ines.h
index 97afb36..4222fb3 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -341,6 +341,7 @@ void Mapper453_Init(CartInfo *);
 void Mapper455_Init(CartInfo *);
 void Mapper456_Init(CartInfo *);
 void Mapper457_Init(CartInfo *);
+void Mapper458_Init(CartInfo *);
 void Mapper459_Init(CartInfo *);
 void Mapper460_Init(CartInfo *);
 void Mapper461_Init(CartInfo *);