--- /dev/null
+/* FCE Ultra - NES/Famicom Emulator\r
+ *\r
+ * Copyright notice for this file:\r
+ * Copyright (C) 2007 CaH4e3\r
+ *\r
+ * This program is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation; either version 2 of the License, or\r
+ * (at your option) any later version.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with this program; if not, write to the Free Software\r
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r
+ */\r
+\r
+#include "mapinc.h"\r
+\r
+static uint8 reg, delay, mirr;\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+ {®, 1, "REG"},\r
+ {&mirr, 1, "MIRR"},\r
+ {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+ setchr8(reg);\r
+ if(!delay)\r
+ {\r
+ setprg16(0x8000,reg);\r
+ setprg8(0xC000,reg << 1);\r
+ }\r
+ setprg8(0xE000,(reg << 1) + 1);\r
+ setmirror(((mirr&4)>>2)^1);\r
+}\r
+\r
+static DECLFW(M175Write1)\r
+{\r
+ mirr = V;\r
+ delay = 1;\r
+ Sync();\r
+}\r
+\r
+static DECLFW(M175Write2)\r
+{\r
+ reg = V & 0x0F;\r
+ delay = 1;\r
+ Sync();\r
+}\r
+\r
+static DECLFR(M175Read)\r
+{\r
+ if(A==0xFFFC)\r
+ {\r
+ delay = 0;\r
+ Sync();\r
+ }\r
+ return CartBR(A);\r
+}\r
+\r
+static void M175Power(void)\r
+{\r
+ reg = mirr = delay = 0;\r
+ SetReadHandler(0x8000,0xFFFF,M175Read);\r
+ SetWriteHandler(0x8000,0x8000,M175Write1);\r
+ SetWriteHandler(0xA000,0xA000,M175Write2);\r
+ Sync(); \r
+}\r
+\r
+static void StateRestore(int version)\r
+{\r
+ Sync();\r
+}\r
+\r
+void Mapper175_Init(CartInfo *info)\r
+{\r
+ info->Power=M175Power;\r
+ GameStateRestore=StateRestore;\r
+\r
+ AddExState(&StateRegs, ~0, 0, 0);\r
+}\r