fceugx/source/fceultra/boards/n-c22m.cpp

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2006 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
 * Mortal Kombat 2 YOKO */

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

static uint8 reg[8];

static SFORMAT StateRegs[]=
{
  {reg, 8, "REGS"},
  {0}
};

static void Sync(void)
{
//  FCEU_printf("(%02x, %02x)\n",reg[3],reg[4]);
  setprg8(0x8000,reg[0]);
  setprg8(0xA000,reg[1]);
  setprg8(0xC000,reg[2]);
  setprg8(0xE000,~0);
//  setchr2(0x0000,reg[3]);
//  setchr2(0x0800,reg[4]);
//  setchr2(0x1000,reg[5]);
//  setchr2(0x1800,reg[6]);
  setchr2(0x0000,reg[3]);
  setchr2(0x0800,reg[4]);
  setchr2(0x1000,reg[5]);
  setchr2(0x1800,reg[6]);
}

static DECLFW(MCN22MWrite)
{
//FCEU_printf("bs %04x %02x\n",A,V);
  switch(A)
  {
    case 0x8c00:
    case 0x8c01:
    case 0x8c02: reg[A&3]=V; break;
    case 0x8d10: reg[3]=V; break;
    case 0x8d11: reg[4]=V; break;
    case 0x8d16: reg[5]=V; break;
    case 0x8d17: reg[6]=V; break;
  }
  Sync();
}

static void MCN22MPower(void)
{
  reg[0]=reg[1]=reg[2]=0;
  Sync();
  SetReadHandler(0x8000,0xFFFF,CartBR);
  SetWriteHandler(0x8000,0xFFFF,MCN22MWrite);
}
/*
static void MCN22MIRQHook(void)
{
  int count = IRQCount;
  if(!count || IRQReload)
  {
     IRQCount = IRQLatch;
     IRQReload = 0;
  }
  else
     IRQCount--;
  if(!IRQCount)
  {
     if(IRQa)
     {
        X6502_IRQBegin(FCEU_IQEXT);
     }
  }
}
*/
static void StateRestore(int version)
{
  Sync();
}

void UNLCN22M_Init(CartInfo *info)
{
  info->Power=MCN22MPower;
//  GameHBIRQHook=MCN22MIRQHook;
  GameStateRestore=StateRestore;
  AddExState(&StateRegs, ~0, 0, 0);
}