Add mapper 587.

src/boards/587.c

@@ -0,0 +1,65 @@
+/* FCE Ultra - 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"
+
+static uint8 reg[2];
+
+static void sync () {
+	if (reg[0] &0x02) {
+		setprg16(0x8000, reg[0] &~0x07 | reg[1] &0x07);
+		setprg16(0xC000, reg[0]                 |0x07);
+	} else {
+		if (reg[0] &0x80)
+			setprg32(0x8000, reg[0] >>1 &~0x03 | reg[1] &0x03);
+		else {
+			setprg16(0x8000, reg[0] &~0x07 | reg[1] &0x07);
+			setprg16(0xC000, reg[0] &~0x07 | reg[1] &0x07);
+		}
+	}
+	setchr8(0);
+	if (reg[0] &0x04)
+		setmirror(reg[1] &0x10? MI_1: MI_0);
+	else
+		setmirror(reg[0] &0x01? MI_H: MI_V);
+}
+
+static DECLFW(writeReg) {
+	reg[reg[0] &0x80? 1: 0] = V;
+	sync();
+}
+
+static void power() {
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, writeReg);
+	reg[0] = reg[1] = 0;
+	sync();
+}
+
+static void stateRestore(int version) {
+	sync();
+}
+
+void Mapper587_Init (CartInfo *info) {
+	info->Reset = power;
+	info->Power = power;
+	GameStateRestore = stateRestore;
+	AddExState(reg, 2, 0, "REGS");
+}

src/ines.c

@@ -957,6 +957,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "ET-82",                    581, Mapper581_Init         )
 	INES_BOARD( "8203",                     583, Mapper583_Init         )
 	INES_BOARD( "HN-02",                    586, Mapper586_Init         )
+	INES_BOARD( "3355",                     587, Mapper587_Init         )
 	INES_BOARD( "ET-81",                    588, Mapper588_Init         )
 	INES_BOARD( "810706",                   589, Mapper589_Init         )
 	INES_BOARD( "810430",                   590, Mapper590_Init         )

src/ines.h

@@ -422,6 +422,7 @@ void Mapper579_Init(CartInfo *);
 void Mapper581_Init(CartInfo *);
 void Mapper583_Init(CartInfo *);
 void Mapper586_Init(CartInfo *);
+void Mapper587_Init(CartInfo *);
 void Mapper588_Init(CartInfo *);
 void Mapper589_Init(CartInfo *);
 void Mapper590_Init(CartInfo *);