merge mapper code from FCEUX

[fceu.git] / boards / 120.c

/* 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;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&reg, 1, "REG"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setprg8(0x6000,reg);\r
  setprg32(0x8000,2);\r
  setchr8(0);\r
}\r
\r
static DECLFW(M120Write)\r
{\r
   if(A==0x41FF)\r
   {\r
     reg=V&7;\r
     Sync();\r
   }\r
}\r
\r
static void M120Power(void)\r
{\r
  reg=0;\r
  Sync();\r
  SetReadHandler(0x6000,0x7FFF,CartBR);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0x4100,0x5FFF,M120Write);\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void Mapper120_Init(CartInfo *info)\r
{\r
  info->Power=M120Power;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r