/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2012 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "mapinc.h"

static uint8 latch;
static writefunc old4016;

static SFORMAT StateRegs[]=
{
  {&latch, 1, "LATC"},
  {0}
};

static void Sync(void)
{
  setchr8((latch >> 2) & 1);
  setprg32(0x8000,0);
  setprg8(0x8000,latch & 4);        /* Special for VS Gumshoe */
}

static DECLFW(M99Write)
{
  latch = V;
  Sync();
  old4016(A,V);
}

static void M99Power(void)
{
  latch = 0;
  Sync();
  old4016=GetWriteHandler(0x4016);
  SetWriteHandler(0x4016,0x4016,M99Write);
  SetReadHandler(0x8000,0xFFFF,CartBR);
}

static void StateRestore(int version)
{
  Sync();
}

void Mapper99_Init(CartInfo *info)
{
  info->Power=M99Power;
  GameStateRestore=StateRestore;
  AddExState(&StateRegs, ~0, 0, 0);
}