Add mapper 416

src/boards/416.c

@@ -0,0 +1,111 @@
+/* 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.
+ */
+
+
+
+#include "mapinc.h"
+
+static uint8 reg;
+static uint8 smb2j_reg;
+static uint8 IRQa;
+static uint16 IRQCount;
+
+static void Sync(void) {
+	if (reg & 8) {
+		uint8 prg = ((reg >> 5) & 1) | ((reg >> 6) & 2) | ((reg >> 1) & 4);
+		switch ((reg >> 6) & 3) {
+		case 0:
+			setprg8(0x8000, prg << 1);
+			setprg8(0xA000, prg << 1);
+			setprg8(0xC000, prg << 1);
+			setprg8(0xE000, prg << 1);
+			break;
+		case 1:
+			setprg16(0x8000, prg);
+			setprg16(0xC000, prg);
+			break;
+		case 2:
+		case 3:
+			setprg32(0x8000, prg >> 1);
+			break;
+		}
+	} else {
+		setprg8(0x8000, 0x0);
+		setprg8(0xA000, 0x1);
+		setprg8(0xC000, smb2j_reg);
+		setprg8(0xE000, 0x3);
+	}
+	setprg8(0x6000, 0x7);
+	setchr8((reg >> 1) & 3);
+	setmirror(((reg >> 2) & 1) ^ 1);
+}
+
+static DECLFW(M416Write4) {
+	switch (A & 0xD160) {
+	case 0x4120:
+		IRQa = V & 1;
+		if (!IRQa)
+			IRQCount = 0;
+		X6502_IRQEnd(FCEU_IQEXT);
+		break;
+	case 0x4020:
+		smb2j_reg = ((V & 1) << 2) | ((V & 6) >> 1);
+		Sync();
+		break;
+	}
+}
+
+static DECLFW(M416Write8) {
+	reg = V;
+	Sync();
+}
+
+static void M416Power(void) {
+	reg = smb2j_reg = IRQa = IRQCount = 0;
+	Sync();
+	SetReadHandler(0x6000, 0xFFFF, CartBR);
+	SetWriteHandler(0x4020, 0x5FFF, M416Write4);
+	SetWriteHandler(0x8000, 0x8000, M416Write8);
+}
+
+static void FP_FASTAPASS(1) M416IRQHook(int a) {
+	if (IRQa) {
+		if (IRQCount < 4096)
+			IRQCount += a;
+		else {
+			IRQa = 0;
+			X6502_IRQBegin(FCEU_IQEXT);
+		}
+	}
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper416_Init(CartInfo *info) {
+	info->Power = M416Power;
+	MapIRQHook  = M416IRQHook;
+	GameStateRestore = StateRestore;
+	AddExState(&reg, 1, 0, "REGS");
+	AddExState(&smb2j_reg, 1, 0, "SMBJ");
+	AddExState(&IRQa, 1, 0, "IRQa");
+	AddExState(&IRQCount, 2, 0, "IRQC");
+}

src/ines.c

@@ -709,6 +709,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "BMC Super 19-in-1 (VIP19)",    401, Mapper401_Init         )
 	INES_BOARD( "89433",                    403, Mapper403_Init         )
 	INES_BOARD( "A88S-1",                   411, Mapper411_Init         )
+	INES_BOARD( "4-in-1/N-32",              416, Mapper416_Init         )
 	INES_BOARD( "BS-400R/BS-4040",          422, Mapper422_Init         )
 	INES_BOARD( "Brilliant Com Cocoma Pack", 516, Mapper516_Init        )
 	INES_BOARD( "Sachen 3014",              533, Mapper533_Init         )

src/ines.h

@@ -293,6 +293,7 @@ void Mapper403_Init(CartInfo *);
 void Mapper404_Init(CartInfo *);
 void Mapper410_Init(CartInfo *);
 void Mapper411_Init(CartInfo *);
+void Mapper416_Init(CartInfo *);
 void Mapper421_Init(CartInfo *);
 void Mapper422_Init(CartInfo *);
 void Mapper428_Init(CartInfo *);