Initial commit - http://sourceforge.net/p/fceumm/code/160/

src/boards/34.c

@@ -0,0 +1,92 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2012 CaH4e3
+ *
+ * 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
+ *
+ * Many-in-one hacked mapper crap.
+ *
+ * Original BNROM is actually AxROM variations without mirroring control,
+ * and haven't SRAM on-board, so it must be removed from here
+ *
+ * Difficult banking is what NINA board doing, most hacks for 34 mapper are
+ * NINA hacks, so this is actually 34 mapper
+ *
+ */
+
+#include "mapinc.h"
+
+static uint8 regs[3];
+static uint8 *WRAM = NULL;
+static uint32 WRAMSIZE;
+
+static SFORMAT StateRegs[] =
+{
+	{ regs, 3, "REGS" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setprg8r(0x10, 0x6000, 0);
+	setprg32(0x8000, regs[0]);
+	setchr4(0x0000, regs[1]);
+	setchr4(0x1000, regs[2]);
+}
+
+static DECLFW(M34Write) {
+	if (A >= 0x8000)
+		regs[0] = V;
+	else
+		switch (A) {
+		case 0x7ffd: regs[0] = V; break;
+		case 0x7ffe: regs[1] = V; break;
+		case 0x7fff: regs[2] = V; break;
+		}
+	Sync();
+}
+
+static void M34Power(void) {
+	regs[0] = regs[1] = 0;
+	regs[2] = 1;
+	Sync();
+	SetReadHandler(0x6000, 0x7ffc, CartBR);
+	SetWriteHandler(0x6000, 0x7ffc, CartBW);
+	SetReadHandler(0x8000, 0xffff, CartBR);
+	SetWriteHandler(0x7ffd, 0xffff, M34Write);
+}
+
+static void M34Close(void) {
+	if (WRAM)
+		FCEU_gfree(WRAM);
+	WRAM = NULL;
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper34_Init(CartInfo *info) {
+	info->Power = M34Power;
+	info->Close = M34Close;
+	GameStateRestore = StateRestore;
+
+	WRAMSIZE = 8192;
+	WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
+	SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
+	AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+
+	AddExState(&StateRegs, ~0, 0, 0);
+}