Add mapper 557.

src/boards/557.c

@@ -0,0 +1,37 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020
+ *
+ * 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_n118.h"
+#include "wram.h"
+
+static void sync() {
+	setprg8r(0x10, 0x6000, 0);
+	N118_syncPRG(0x0F, 0x00);
+	setchr8(0);
+	setmirror(N118_getCHRBank(7) &0x20? MI_H: MI_V);
+}
+
+void Mapper557_Init(CartInfo *info) {
+	N118_init(info, sync, NULL, NULL);
+	WRAM_init(info, 8);
+}