merge mapper code from FCEUX

[fceu.git] / boards / 178.c

diff --git a/boards/178.c b/boards/178.c
new file mode 100644 (file)
index 0000000..19e1b8d
--- /dev/null
+++ b/boards/178.c
@@ -0,0 +1,101 @@
+/* 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[3];\r
+static uint8 *WRAM=NULL;\r
+static uint32 WRAMSIZE;\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+  {reg, 3, "REGS"},\r
+  {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+  setmirror(reg[0]);\r
+  setprg8r(0x10,0x6000,0);\r
+  setchr8(0);\r
+  setprg32(0x8000,(reg[1]+reg[2]));\r
+}\r
+\r
+static DECLFW(M178Write0)\r
+{\r
+  reg[0]=(V&1)^1;\r
+  Sync();\r
+}\r
+\r
+static DECLFW(M178Write1)\r
+{\r
+  reg[1]=(V>>1)&0xf;\r
+  Sync();\r
+}\r
+\r
+static DECLFW(M178Write2)\r
+{\r
+  reg[2]=(V<<2);\r
+  Sync();\r
+}\r
+\r
+static void M178Power(void)\r
+{\r
+  reg[0]=1; reg[1]=0; reg[2]=0;\r
+  Sync();\r
+  SetReadHandler(0x6000,0x7FFF,CartBR);\r
+  SetWriteHandler(0x6000,0x7FFF,CartBW);\r
+  SetReadHandler(0x8000,0xFFFF,CartBR);\r
+  SetWriteHandler(0x4800,0x4800,M178Write0);\r
+  SetWriteHandler(0x4801,0x4801,M178Write1);\r
+  SetWriteHandler(0x4802,0x4802,M178Write2);\r
+}\r
+\r
+static void M178Close(void)\r
+{\r
+  if(WRAM)\r
+    FCEU_gfree(WRAM);\r
+  WRAM=NULL;\r
+}\r
+\r
+\r
+static void StateRestore(int version)\r
+{\r
+  Sync();\r
+}\r
+\r
+void Mapper178_Init(CartInfo *info)\r
+{\r
+  info->Power=M178Power;\r
+  info->Close=M178Close;\r
+  GameStateRestore=StateRestore;\r
+\r
+  WRAMSIZE=8192;\r
+  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
+  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
+  if(info->battery)\r
+  {\r
+    info->SaveGame[0]=WRAM;\r
+    info->SaveGameLen[0]=WRAMSIZE;\r
+  }\r
+  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
+\r
+  AddExState(&StateRegs, ~0, 0, 0);\r
+}\r