Add mapper 586.

src/boards/586.c

@@ -0,0 +1,37 @@
+/* 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"
+#include "asic_latch.h"
+
+static void sync () {
+	if (Latch_address &0x08) {
+		setprg16(0x8000, Latch_address);
+		setprg16(0xC000, Latch_address);
+	} else
+		setprg32(0x8000, Latch_address >>1);
+	setchr8(Latch_address);
+	setmirror(Latch_address &0x08? MI_V: MI_H);
+}
+
+void Mapper586_Init (CartInfo *info) {
+	Latch_init(info, sync, 0x8000, 0xFFFF, NULL);
+	info->Reset = Latch_power;
+}

src/boards/asic_latch.c

@@ -36,7 +36,7 @@ static SFORMAT Latch_state[] = {
 DECLFW(Latch_write) {
 	uint16 newAddress = A &0xFFFF;
 	if (Latch_cbWrite) Latch_cbWrite(&newAddress, &V, CartBR(A));
-	Latch_address = A;
+	Latch_address = newAddress;
 	Latch_data = V;
 	Latch_cbSync();
 }
@@ -48,6 +48,7 @@ static void Latch_clear () {
 }
 
 static void Latch_setHandlers() {
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
 	SetWriteHandler(Latch_from, Latch_to, Latch_write);
 }
 

src/ines.c

@@ -948,6 +948,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Bung Super Game Doctor",   561, Mapper561_562_Init     )
 	INES_BOARD( "Venus Turbo Game Doctor",  562, Mapper561_562_Init     )
 	INES_BOARD( "J-2020",                   563, Mapper563_Init         )
+	INES_BOARD( "HN-02",                    586, Mapper586_Init         )
 INES_BOARD_END()
 
 static uint32 iNES_get_mapper_id(void)

src/ines.h

@@ -413,6 +413,7 @@ void Mapper558_Init(CartInfo *);
 void Mapper559_Init(CartInfo *);
 void Mapper561_562_Init(CartInfo *);
 void Mapper563_Init(CartInfo *);
+void Mapper586_Init(CartInfo *);
 
 void FFE_Init(CartInfo *);