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Viewing changes to fceu/src/boards/103.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Fabrice Coutadeur
  • Date: 2009-12-14 08:05:17 UTC
  • Revision ID: james.westby@ubuntu.com-20091214080517-abi5tj8avthfan7c
Tags: upstream-2.1.2+repack
Import upstream version 2.1.2+repack

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fceu/src/boards/103.cpp
 
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/* FCE Ultra - NES/Famicom Emulator
 
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 *
 
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 * Copyright notice for this file:
 
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 *  Copyright (C) 2007 CaH4e3
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation; either version 2 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software
 
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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 */
 
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#include "mapinc.h"
 
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static uint8 reg0, reg1, reg2;
 
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static uint8 *WRAM=NULL;
 
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static uint32 WRAMSIZE;
 
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static SFORMAT StateRegs[]=
 
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{
 
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  {&reg0, 1, "REG0"},
 
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  {&reg1, 1, "REG1"},
 
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  {&reg2, 1, "REG2"},
 
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  {0}
 
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};
 
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static void Sync(void)
 
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{
 
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  setchr8(0);
 
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  setprg8(0x8000,0xc);
 
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  setprg8(0xe000,0xf);
 
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  if(reg2&0x10)
 
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  {
 
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    setprg8(0x6000,reg0);
 
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    setprg8(0xa000,0xd);
 
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    setprg8(0xc000,0xe);
 
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  }
 
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  else
 
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  {
 
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    setprg8r(0x10,0x6000,0);
 
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    setprg4(0xa000,(0xd<<1));
 
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    setprg2(0xb000,(0xd<<2)+2);
 
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    setprg2r(0x10,0xb800,4);
 
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    setprg2r(0x10,0xc000,5);
 
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    setprg2r(0x10,0xc800,6);
 
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    setprg2r(0x10,0xd000,7);
 
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    setprg2(0xd800,(0xe<<2)+3);
 
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  }
 
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  setmirror(reg1^1);
 
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}
 
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static DECLFW(M103RamWrite0)
 
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{
 
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  WRAM[A&0x1FFF]=V;
 
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}
 
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static DECLFW(M103RamWrite1)
 
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{
 
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  WRAM[0x2000+((A-0xB800)&0x1FFF)]=V;
 
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}
 
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static DECLFW(M103Write0)
 
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{
 
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  reg0=V&0xf;
 
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  Sync();
 
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}
 
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static DECLFW(M103Write1)
 
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{
 
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  reg1=(V>>3)&1;
 
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  Sync();
 
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}
 
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static DECLFW(M103Write2)
 
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{
 
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  reg2=V;
 
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  Sync();
 
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}
 
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static void M103Power(void)
 
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{
 
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  reg0=reg1=0; reg2=0;
 
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  Sync();
 
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  SetReadHandler(0x6000,0x7FFF,CartBR);
 
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  SetWriteHandler(0x6000,0x7FFF,M103RamWrite0);
 
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  SetReadHandler(0x8000,0xFFFF,CartBR);
 
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  SetWriteHandler(0xB800,0xD7FF,M103RamWrite1);
 
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  SetWriteHandler(0x8000,0x8FFF,M103Write0);
 
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  SetWriteHandler(0xE000,0xEFFF,M103Write1);
 
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  SetWriteHandler(0xF000,0xFFFF,M103Write2);
 
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}
 
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static void M103Close(void)
 
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{
 
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  if(WRAM)
 
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    FCEU_gfree(WRAM);
 
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  WRAM=NULL;
 
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}
 
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static void StateRestore(int version)
 
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{
 
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  Sync();
 
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}
 
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void Mapper103_Init(CartInfo *info)
 
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{
 
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  info->Power=M103Power;
 
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  info->Close=M103Close;
 
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  GameStateRestore=StateRestore;
 
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  WRAMSIZE=16384;
 
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  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
 
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  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
 
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  AddExState(WRAM, WRAMSIZE, 0, "WRAM");
 
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  AddExState(&StateRegs, ~0, 0, 0);
 
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}