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Viewing changes to fceu/src/boards/3d-block.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/3d-block.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 reg[4], IRQa;
 
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static int16 IRQCount, IRQPause;
 
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static int16 Count = 0x0000;
 
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static SFORMAT StateRegs[]=
 
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{
 
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  {reg, 4, "REGS"},
 
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  {&IRQa, 1, "IRQA"},
 
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  {&IRQCount, 2, "IRQC"},
 
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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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  setprg32(0x8000,0);
 
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  setchr8(0);
 
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}
 
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//#define Count 0x1800
 
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#define Pause 0x010
 
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static DECLFW(UNL3DBlockWrite)
 
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{
 
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  switch(A)
 
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  {
 
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//4800 32
 
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//4900 37
 
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//4a00 01
 
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//4e00 18
 
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    case 0x4800: reg[0]=V; break;
 
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    case 0x4900: reg[1]=V; break;
 
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    case 0x4a00: reg[2]=V; break;
 
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    case 0x4e00: reg[3]=V; IRQCount=Count; IRQPause=Pause; IRQa=1; X6502_IRQEnd(FCEU_IQEXT); break;
 
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  } 
 
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}
 
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static void UNL3DBlockPower(void)
 
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{
 
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  Sync();
 
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  SetReadHandler(0x8000,0xFFFF,CartBR);
 
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  SetWriteHandler(0x4800,0x4E00,UNL3DBlockWrite);
 
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}
 
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static void UNL3DBlockReset(void)
 
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{
 
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  Count+=0x10;
 
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  FCEU_printf("Count=%04x\n",Count);
 
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}
 
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static void UNL3DBlockIRQHook(int a)
 
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{
 
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  if(IRQa)
 
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  {
 
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    if(IRQCount>0)
 
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    {
 
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      IRQCount-=a;
 
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    }
 
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    else
 
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    {
 
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      if(IRQPause>0)
 
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      {
 
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        IRQPause-=a;
 
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        X6502_IRQBegin(FCEU_IQEXT);
 
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      }
 
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      else
 
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      {
 
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        IRQCount=Count; 
 
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        IRQPause=Pause;
 
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        X6502_IRQEnd(FCEU_IQEXT);
 
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      }
 
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    }
 
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  }
 
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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 UNL3DBlock_Init(CartInfo *info)
 
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{
 
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  info->Power=UNL3DBlockPower;
 
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  info->Reset=UNL3DBlockReset;
 
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  MapIRQHook=UNL3DBlockIRQHook;
 
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  GameStateRestore=StateRestore;
 
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  AddExState(&StateRegs, ~0, 0, 0);
 
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}