/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2005 CaH4e3
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "mapinc.h"
#include "mmc3.h"

static uint8 *CHRRAM = NULL;
static int masko8[8]={63,31,15,1,3,0,0,0};

static void Super24PW(uint32 A, uint8 V)
{
  uint32 NV=V&masko8[EXPREGS[0]&7];
  NV|=(EXPREGS[1]<<1);
  setprg8r((NV>>6)&0xF,A,NV);
}

static void Super24CW(uint32 A, uint8 V)
{
  if(EXPREGS[0]&0x20)
    setchr1r(0x10,A,V);
  else
  {
    uint32 NV=V|(EXPREGS[2]<<3);
    setchr1r((NV>>9)&0xF,A,NV);
  }
}

static DECLFW(Super24Write)
{
  switch(A)
  {
    case 0x5FF0: EXPREGS[0]=V;
                 FixMMC3PRG(MMC3_cmd);
                 FixMMC3CHR(MMC3_cmd);
                 break;
    case 0x5FF1: EXPREGS[1]=V;
                 FixMMC3PRG(MMC3_cmd);
                 break;
    case 0x5FF2: EXPREGS[2]=V;
                 FixMMC3CHR(MMC3_cmd);
                 break;
  }
}

static void Super24Power(void)
{
  EXPREGS[0]=0x24;
  EXPREGS[1]=159;
  EXPREGS[2]=0;
  GenMMC3Power();
  SetWriteHandler(0x5000,0x7FFF,Super24Write);
  SetReadHandler(0x8000,0xFFFF,CartBR);
}

static void Super24Reset(void)
{
  EXPREGS[0]=0x24;
  EXPREGS[1]=159;
  EXPREGS[2]=0;
  MMC3RegReset();
}

static void Super24Close(void)
{
  if(CHRRAM)
    FCEU_gfree(CHRRAM);
  CHRRAM = NULL;
}

void Super24_Init(CartInfo *info)
{
  GenMMC3_Init(info, 128, 256, 0, 0);
  info->Power=Super24Power;
  info->Reset=Super24Reset;
  info->Close=Super24Close;
  cwrap=Super24CW;
  pwrap=Super24PW;
  CHRRAM=(uint8*)FCEU_gmalloc(8192);
  SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);
  AddExState(CHRRAM, 8192, 0, "CHRR");
  AddExState(EXPREGS, 3, 0, "BIG2");
}
