Add mapper 453

src/boards/453.c

@@ -0,0 +1,57 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2023
+ *
+ * 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 453 - Realtec 8042
+ * 3-in-1 1995 World Competitive Champion Edition (DG-002)
+ */
+
+#include "mapinc.h"
+#include "latch.h"
+
+static void Sync(void) {
+	setchr8(0);
+	if (latch.data & 0x40) {
+		setprg32(0x8000, ((latch.data >> 3) & 0x18) |  (latch.data & 7));
+	} else {
+		setprg16(0x8000, (((latch.data >> 2) & 0x38) | latch.data & 7));
+		setprg16(0xC000, (latch.data >> 2 & 0x38) | 7);
+	}
+    setmirror(((latch.data >> 5) & 2) + (((latch.data >> 4) & 1) ^ 1));
+}
+
+static DECLFW(M453WriteLatch) {
+    if (latch.data & 0xE0)
+		latch.data = (latch.data & 0xE0) | (V & ~0xE0);
+    else
+		latch.data = V;
+    Sync();
+}
+
+static void M453Power(void) {
+    LatchPower();
+    SetWriteHandler(0x8000, 0xFFFF, M453WriteLatch);
+}
+
+void Mapper453_Init(CartInfo *info) {
+	Latch_Init(info, Sync, NULL, 0, 0);
+	info->Power = M453Power;
+	info->Reset = LatchHardReset;
+}