Add mapper 368

src/boards/357.c

@@ -29,15 +29,16 @@
 
 static uint8 preg[4];
 static uint8 dipswitch;
-static uint32 IRQCount, IRQa;
+static uint8 IRQa;
+static uint16 IRQCount;
 
 static const uint8 banks[8] = { 4, 3, 5, 3, 6, 3, 7, 3 };
 static const uint8 outer_bank[4] = { 0x00, 0x08, 0x10, 0x18 };
 
 static SFORMAT StateRegs[] =
 {
-	{ &IRQCount, 4 | FCEUSTATE_RLSB, "IRQC" },
+	{ &IRQCount, 2 | FCEUSTATE_RLSB, "IRQC" },
-	{ &IRQa, 4 | FCEUSTATE_RLSB, "IRQA" },
+	{ &IRQa, 1 | FCEUSTATE_RLSB, "IRQA" },
 	{ &dipswitch, 1, "DPSW" },
 	{ &preg, 4, "REG" },
 	{ 0 }

src/boards/368.c

@@ -0,0 +1,113 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 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.
+ */
+
+/* NES 2.0 Mapper 357 is used for a 4-in-1 multicart (cartridge ID 4602) from Bit Corp.
+ * The first game is Bit Corp's hack of the YUNG-08 conversion of Super Mario Brothers 2 (J) named Mr. Mary 2,
+ * the other three games are UNROM games.
+ *
+ * Implementation is modified so reset actually sets the correct dipswitch (or outer banks) for each of the 4 games
+ */
+
+#include "mapinc.h"
+
+static uint8 preg;
+static uint8 latch;
+static uint8 IRQa;
+static uint16 IRQCount;
+
+static const uint8 banks[8] = { 4, 3, 5, 3, 6, 3, 7, 3 };
+
+static SFORMAT StateRegs[] =
+{
+	{ &IRQCount, 2 | FCEUSTATE_RLSB, "IRQC" },
+	{ &IRQa, 1, "IRQA" },
+	{ &latch, 1, "LATC" },
+	{ &preg, 1, "REG" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setprg8(0x6000, 2);
+	setprg8(0x8000, 1);
+	setprg8(0xa000, 0);
+	setprg8(0xc000, banks[preg]);
+	setprg8(0xe000, 8);
+	setchr8(0);
+}
+
+static DECLFW(M368WritePRG) {
+    preg = V & 7;
+    Sync();
+}
+
+static DECLFW(M368WriteIRQ) {
+	latch = V & 0x53;
+    IRQa = V & 1;
+	if (!IRQa) {
+		IRQCount = 0;
+		X6502_IRQEnd(FCEU_IQEXT);
+	}
+}
+
+static DECLFR(M368Read) {
+    return (latch | 0xBA);
+}
+
+static void M368Power(void) {
+	preg = 0;
+	latch = 0;
+	IRQa = IRQCount = 0;
+	Sync();
+    SetReadHandler(0x4122, 0x4122, M368Read);
+	SetReadHandler(0x6000, 0x7FFF, CartBR);
+    SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x4022, 0x4022, M368WritePRG);
+	SetWriteHandler(0x4120, 0x4120, M368WritePRG);
+	SetWriteHandler(0x4122, 0x4122, M368WriteIRQ);
+	//SetWriteHandler(0x8000, 0xffff, M368WriteUNROM);
+}
+
+static void M368Reset(void) {
+	IRQa = IRQCount = 0;
+	Sync();
+}
+
+static void FP_FASTAPASS(1) M368IRQHook(int a) {
+	if (IRQa) {
+		if (IRQCount < 4096)
+			IRQCount += a;
+		else {
+			IRQa = 0;
+			X6502_IRQBegin(FCEU_IQEXT);
+		}
+	}
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper368_Init(CartInfo *info) {
+	info->Reset = M368Reset;
+	info->Power = M368Power;
+	MapIRQHook = M368IRQHook;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}

src/ines.c

@@ -693,6 +693,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Bitcorp 31-in-1",          360, Mapper360_Init         )
 	INES_BOARD( "OK-411",                   361, GN45_Init              ) /* OK-411 is emulated together with GN-45 */
 	INES_BOARD( "GN-45",                    366, GN45_Init              )
+	INES_BOARD( "Yung-08",                  368, Mapper368_Init              )
 	INES_BOARD( "Golden Mario Party II - Around the World 6-in-1",       370, Mapper370_Init         )
 	INES_BOARD( "MMC3 PIRATE SFC-12",       372, Mapper372_Init         )
 	INES_BOARD( "95/96 Super HiK 4-in-1",   374, Mapper374_Init         )

src/ines.h

@@ -268,6 +268,7 @@ void Mapper357_Init(CartInfo *);
 void Mapper358_Init(CartInfo *);
 void Mapper359_Init(CartInfo *);
 void Mapper360_Init(CartInfo *);
+void Mapper368_Init(CartInfo *);
 void Mapper369_Init(CartInfo *);
 void Mapper370_Init(CartInfo *);
 void Mapper372_Init(CartInfo *);