Add mapper 294

src/boards/294.c

@@ -0,0 +1,61 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 NewRisingSun
+ *
+ * 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 latch;
+
+static void Mapper294_sync (void) {
+	setprg16(0x8000, latch);
+	setprg16(0xC000, latch |7);
+	setchr8(0);
+	setmirror(latch &0x80? MI_H: MI_V);
+}
+
+static DECLFW(Mapper294_writeInnerBank) {
+	latch =latch &~7 | V&7;
+	Mapper294_sync();
+}
+
+static DECLFW(Mapper294_writeOuterBank) {
+	if (A &0x100) {
+		latch =latch &7 | V <<3;
+		Mapper294_sync();
+	}
+}
+
+static void Mapper294_reset(void) {
+	latch =0;
+	Mapper294_sync();
+}
+
+static void Mapper294_power(void) {
+	Mapper294_reset();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, Mapper294_writeInnerBank);
+	SetWriteHandler(0x4020, 0x7FFF, Mapper294_writeOuterBank);
+}
+
+void Mapper294_Init(CartInfo *info) {
+	info->Power = Mapper294_power;
+	info->Reset = Mapper294_reset;
+	AddExState(&latch, 1, 0, "LATC");
+}