Add support for FARID_UNROM_8-IN-1 and NEWSTAR-GRM070-8IN1

src/boards/faridunrom.c

@@ -0,0 +1,70 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2019 Libretro Team
+ *
+ * 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 324
+ * FARID_UNROM_8-IN-1
+ * https://wiki.nesdev.com/w/index.php/NES_2.0_Mapper_324
+ */
+
+#include "mapinc.h"
+
+static uint8 latch;
+
+static SFORMAT StateRegs[] =
+{
+	{ &latch, 1, "LATC" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setchr8(0);
+	setprg16(0x8000, ((latch & 0x70) >> 1) | (latch & 0x07));
+	setprg16(0xC000, ((latch & 0x70) >> 1) | 0x07 );
+}
+
+static DECLFW(FARIDUNROMWrite) {
+	V &= CartBR(A);
+	if ((V & 0x80) && !(latch & 0x80) && !(latch & 0x08))
+		latch = (latch & 0x87) | (V & 0x78);
+	latch = (latch & 0x78) | (V & 0x87);
+	Sync();
+}
+
+static void FARIDUNROMPower(void) {
+	Sync();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, FARIDUNROMWrite);
+}
+
+static void FARIDUNROMReset(void) {
+	latch &= ~0x78;
+	Sync();
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void FARIDUNROM_Init(CartInfo *info) {
+	info->Power = FARIDUNROMPower;
+	info->Reset = FARIDUNROMReset;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}