Merge pull request #389 from negativeExponent/mapper554

Add mapper 554

src/boards/554.c

@@ -0,0 +1,77 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020 negativeExponent
+ *
+ * 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
+ */
+
+/* Mapper 554 - Kaiser KS-7010
+ * used for one of several cartridge conversions of the FDS version of
+ * 悪魔城 Dracula, the Japanese version of Castlevania
+ */
+
+#include "mapinc.h"
+
+static uint8 reg;
+
+static SFORMAT StateRegs[] =
+{
+	{ &reg, 1, "REG" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setprg8(0x6000, reg);
+    setprg8(0x8000, 10);
+    setprg8(0xA000, 11);
+    setprg8(0xC000, 6);
+    setprg8(0xE000, 7);
+    setchr8(reg);
+}
+
+static DECLFR(M554Read) {
+    if ((A >= 0xCAB6) && (A < 0xCAD7))
+    {
+        reg = (A >> 2) & 0x0F;
+        Sync();
+    }
+    else if ((A == 0xEBE2) || (A == 0xEE32))
+    {
+        reg = (A >> 2) & 0x0F;
+        Sync();
+    }
+    else if (A == 0xFFFC)
+    {
+        reg = (A >> 2) & 0x0F;
+        Sync();
+    }
+    return CartBR(A);
+}
+
+static void M554Power(void) {
+	Sync();
+    SetReadHandler(0x6000, 0xFFFF, M554Read);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper554_Init(CartInfo *info) {
+	info->Power = M554Power;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}

src/ines.c

@@ -706,6 +706,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "82112C",                   540, Mapper540_Init         )
 	INES_BOARD( "LittleCom 160-in-1",       541, Mapper541_Init         )
 	INES_BOARD( "5-in-1 (CH-501)",          543, Mapper543_Init         )
+	INES_BOARD( "KS-7010",                  554, Mapper554_Init         )
 	INES_BOARD( "",                         550, Mapper550_Init         )
 
 	/* UNIF to NES 2.0 BOARDS */

src/ines.h

@@ -274,5 +274,6 @@ void Mapper540_Init(CartInfo *);
 void Mapper541_Init(CartInfo *);
 void Mapper543_Init(CartInfo *);
 void Mapper550_Init(CartInfo *);
+void Mapper554_Init(CartInfo *);
 
 #endif