fceugx/source/fceultra/boards/ks7030.cpp

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2007 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
 *
 * FDS Conversion
 *
 * Logical bank layot 32 K BANK 0, 64K BANK 1, 32K ~0 hardwired, 8K is missing
 * need redump from MASKROM!
 * probably need refix mapper after hard dump
 *
 */

#include "mapinc.h"

static uint8 reg0, reg1;
static uint8 *WRAM=NULL;
static uint32 WRAMSIZE;

static SFORMAT StateRegs[]=
{
  {&reg0, 1, "REG0"},
  {&reg1, 1, "REG1"},
  {0}
};

static void Sync(void)
{
  setchr8(0);
  setprg32(0x8000,~0);
  setprg4(0xb800,reg0);
  setprg4(0xc800,8+reg1);
}

// 6000 - 6BFF - RAM
// 6C00 - 6FFF - BANK 1K REG1
// 7000 - 7FFF - BANK 4K REG0

static DECLFW(UNLKS7030RamWrite0)
{
  if((A >= 0x6000) && A <= 0x6BFF) {
    WRAM[A-0x6000]=V;
  } else if((A >= 0x6C00) && A <= 0x6FFF) {
    CartBW(0xC800 + (A - 0x6C00), V);
  } else if((A >= 0x7000) && A <= 0x7FFF) {
    CartBW(0xB800 + (A - 0x7000), V);
  }
}

static DECLFR(UNLKS7030RamRead0)
{
  if((A >= 0x6000) && A <= 0x6BFF) {
    return WRAM[A-0x6000];
  } else if((A >= 0x6C00) && A <= 0x6FFF) {
    return CartBR(0xC800 + (A - 0x6C00));
  } else if((A >= 0x7000) && A <= 0x7FFF) {
    return CartBR(0xB800 + (A - 0x7000));
  }
  return 0;
}

// B800 - BFFF - RAM
// C000 - CBFF - BANK 3K
// CC00 - D7FF - RAM

static DECLFW(UNLKS7030RamWrite1)
{
  if((A >= 0xB800) && A <= 0xBFFF) {
    WRAM[0x0C00+(A-0xB800)]=V;
  } else if((A >= 0xC000) && A <= 0xCBFF) {
    CartBW(0xCC00 + (A - 0xC000), V);
  } else if((A >= 0xCC00) && A <= 0xD7FF) {
    WRAM[0x1400+(A-0xCC00)]=V;
  }
}

static DECLFR(UNLKS7030RamRead1)
{
  if((A >= 0xB800) && A <= 0xBFFF) {
    return WRAM[0x0C00+(A-0xB800)];
  } else if((A >= 0xC000) && A <= 0xCBFF) {
    return CartBR(0xCC00 + (A - 0xC000));
  } else if((A >= 0xCC00) && A <= 0xD7FF) {
    return WRAM[0x1400+(A-0xCC00)];
  }
  return 0;
}

static DECLFW(UNLKS7030Write0)
{
  reg0=A&7;
  Sync();
}

static DECLFW(UNLKS7030Write1)
{
  reg1=A&15;
  Sync();
}

static void UNLKS7030Power(void)
{
  reg0=reg1=~0;
  Sync();
  SetReadHandler(0x6000,0x7FFF,UNLKS7030RamRead0);
  SetWriteHandler(0x6000,0x7FFF,UNLKS7030RamWrite0);
  SetReadHandler(0x8000,0xFFFF,CartBR);
  SetWriteHandler(0x8000,0x8FFF,UNLKS7030Write0);
  SetWriteHandler(0x9000,0x9FFF,UNLKS7030Write1);
  SetReadHandler(0xB800,0xD7FF,UNLKS7030RamRead1);
  SetWriteHandler(0xB800,0xD7FF,UNLKS7030RamWrite1);
}

static void UNLKS7030Close(void)
{
  if(WRAM)
    FCEU_gfree(WRAM);
  WRAM=NULL;
}

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

void UNLKS7030_Init(CartInfo *info)
{
  info->Power=UNLKS7030Power;
  info->Close=UNLKS7030Close;
  GameStateRestore=StateRestore;

  WRAMSIZE=8192;
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");

  AddExState(&StateRegs, ~0, 0, 0);
}