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

src/boards/206.c

@@ -0,0 +1,78 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2002 Xodnizel
+ *
+ * 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 cmd;
+static uint8 DRegs[8];
+
+static SFORMAT StateRegs[] =
+{
+	{ &cmd, 1, "CMD" },
+	{ DRegs, 8, "DREG" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setchr2(0x0000, DRegs[0]);
+	setchr2(0x0800, DRegs[1]);
+	int x;
+	for (x = 0; x < 4; x++)
+		setchr1(0x1000 + (x << 10), DRegs[2 + x]);
+	setprg8(0x8000, DRegs[6]);
+	setprg8(0xa000, DRegs[7]);
+	setprg8(0xc000, ~1);
+	setprg8(0xe000, ~0);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+static DECLFW(M206Write) {
+	switch (A & 0x8001) {
+	case 0x8000: cmd = V & 0x07; break;
+	case 0x8001:
+		if (cmd <= 0x05)
+			V &= 0x3F;
+		else
+			V &= 0x0F;
+		if (cmd <= 0x01) V >>= 1;
+		DRegs[cmd & 0x07] = V;
+		Sync();
+		break;
+	}
+}
+
+static void M206Power(void) {
+	cmd = 0;
+	DRegs[6] = 0;
+	DRegs[7] = 1;
+	Sync();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, M206Write);
+}
+
+
+void Mapper206_Init(CartInfo *info) {
+	info->Power = M206Power;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}