perfect vsync, bugfixes

[fceu.git] / boards / sonic5.c

/* 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 m_perm[8] = {0, 1, 0, 3, 0, 5, 6, 7};

static void UNLSonicPW(uint32 A, uint8 V)
{
  if(EXPREGS[0]&0x80)
  {
    uint8 bank=EXPREGS[0]&0x1F;
    if(EXPREGS[0]&0x20)
      setprg32(0x8000,bank>>2);
    else
    {
      setprg16(0x8000,bank);
      setprg16(0xC000,bank);
    }
  }
  else
    setprg8(A,V&0x3F);
}

/*
static DECLFW(UNLSonicWrite8000)
{
  if(V&0x80)
    MMC3_CMDWrite(A,V);
  else
    MMC3_CMDWrite(A,m_perm[V&7]);
}
*/

static DECLFW(UNLSonicWriteLo)
{
  EXPREGS[0]=V;
  FixMMC3PRG(MMC3_cmd);
}

static void UNLSonicPower(void)
{
  EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=0;
  GenMMC3Power();
  SetWriteHandler(0x5000,0x5FFF,UNLSonicWriteLo);
//  SetWriteHandler(0x8000,0x8000,UNLSonicWrite8000);
}

void UNLSonic_Init(CartInfo *info)
{
  GenMMC3_Init(info, 256, 256, 0, 0);
  pwrap=UNLSonicPW;
  info->Power=UNLSonicPower;
  AddExState(EXPREGS, 3, 0, "EXPR");
}