Add mapper 455

src/boards/455.c

@@ -0,0 +1,77 @@
+/* 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
+ */
+
+/* N625836 PCB */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static void Mapper455_PRGWrap(uint32 A, uint8 V) {
+	int prgAND =EXPREGS[1] &0x01? 0x1F: 0x0F;
+	int prgOR  =EXPREGS[0] >>2 &0x07 | EXPREGS[1] <<1 &0x08 | EXPREGS[0] >>2 &0x10;
+	if (EXPREGS[0] &0x01) {
+		if (EXPREGS[0] &0x02) {
+			setprg32(0x8000, prgOR >>1);
+		} else {
+			setprg16(0x8000, prgOR);
+			setprg16(0xC000, prgOR);
+		}
+	} else {
+		prgOR <<=1;
+		setprg8(A, V &prgAND | prgOR &~prgAND);
+	}
+}
+
+static void Mapper455_CHRWrap(uint32 A, uint8 V) {
+	int chrAND =EXPREGS[1] &0x02? 0xFF: 0x7F;
+	int chrOR  =(EXPREGS[0] >>2 &0x07 | EXPREGS[1] <<1 &0x08 | EXPREGS[0] >>2 &0x10) <<4;
+	setchr1(A, V &chrAND | chrOR &~chrAND);
+}
+
+static DECLFW(Mapper455_Write) {
+	if (A &0x100) {
+		EXPREGS[0] =V;
+		EXPREGS[1] =A &0xFF;
+		FixMMC3PRG(MMC3_cmd);
+		FixMMC3CHR(MMC3_cmd);
+	}
+}
+
+static void Mapper455_Reset(void) {
+	EXPREGS[0] =1;
+	EXPREGS[1] =0;
+	MMC3RegReset();
+}
+
+static void Mapper455_Power(void) {
+	EXPREGS[0] =1;
+	EXPREGS[1] =0;
+	GenMMC3Power();
+	SetWriteHandler(0x4100, 0x5FFF, Mapper455_Write);
+}
+
+void Mapper455_Init(CartInfo *info) {
+	GenMMC3_Init(info, 256, 256, 0, 0);
+	cwrap = Mapper455_CHRWrap;
+	pwrap = Mapper455_PRGWrap;
+	info->Power = Mapper455_Power;
+	info->Reset = Mapper455_Reset;
+	AddExState(EXPREGS, 2, 0, "EXPR");
+}

src/ines.c

@@ -820,6 +820,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "NC-7000M/NC-8000M",        444, Mapper444_Init         )
 	INES_BOARD( "22-in-1 King Series",      449, Mapper449_Init         )
 	INES_BOARD( "DS-9-27",                  452, Mapper452_Init         )
+	INES_BOARD( "N625836",                  455, Mapper455_Init         )
 	INES_BOARD( "K6C3001A",                 456, Mapper456_Init         )
 	INES_BOARD( "8-in-1",                   459, Mapper459_Init         )
 	INES_BOARD( "FC-29-40/K-3101",        	460, Mapper460_Init         )

src/ines.h

@@ -328,6 +328,7 @@ void Mapper443_Init(CartInfo *);
 void Mapper444_Init(CartInfo *);
 void Mapper449_Init(CartInfo *);
 void Mapper452_Init(CartInfo *);
+void Mapper455_Init(CartInfo *);
 void Mapper456_Init(CartInfo *);
 void Mapper459_Init(CartInfo *);
 void Mapper460_Init(CartInfo *);