merge mapper code from FCEUX

[fceu.git] / boards / 186.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2005 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
 * Family Study Box by Fukutake Shoten\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 SWRAM[2816];\r
static uint8 *WRAM=NULL;\r
static uint8 regs[4];\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {regs, 4, "DREG"},\r
  {SWRAM, 2816, "SWRAM"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setprg8r(0x10,0x6000,regs[0]>>6);\r
  setprg16(0x8000,regs[1]);\r
  setprg16(0xc000,0);\r
}\r
\r
static DECLFW(M186Write)\r
{\r
  if(A&0x4203) regs[A&3]=V;\r
  Sync();\r
}\r
\r
static DECLFR(M186Read)\r
{\r
  switch(A)\r
  {\r
    case 0x4200: return 0x00; break;\r
    case 0x4201: return 0x00; break;\r
    case 0x4202: return 0x40; break;\r
    case 0x4203: return 0x00; break;\r
  }\r
  return 0xFF;\r
}\r
\r
static DECLFR(ASWRAM)\r
{\r
  return(SWRAM[A-0x4400]);\r
}\r
static DECLFW(BSWRAM)\r
{\r
  SWRAM[A-0x4400]=V;\r
}\r
\r
static void M186Power(void)\r
{\r
  setchr8(0);\r
  SetReadHandler(0x6000,0xFFFF,CartBR);\r
  SetWriteHandler(0x6000,0xFFFF,CartBW);\r
  SetReadHandler(0x4200,0x43FF,M186Read);\r
  SetWriteHandler(0x4200,0x43FF,M186Write);\r
  SetReadHandler(0x4400,0x4EFF,ASWRAM);\r
  SetWriteHandler(0x4400,0x4EFF,BSWRAM);\r
  regs[0]=regs[1]=regs[2]=regs[3];\r
  Sync();\r
}\r
\r
static void M186Close(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
static void M186Restore(int version)\r
{\r
  Sync();\r
}\r
\r
void Mapper186_Init(CartInfo *info)\r
{\r
  info->Power=M186Power;\r
  info->Close=M186Close;\r
  GameStateRestore=M186Restore;\r
  WRAM=(uint8*)FCEU_gmalloc(32768);\r
  SetupCartPRGMapping(0x10,WRAM,32768,1);\r
  AddExState(WRAM, 32768, 0, "WRAM");\r
  AddExState(StateRegs, ~0, 0, 0);\r
}\r