merge mapper code from FCEUX

[fceu.git] / boards / 178.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[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