mirror of
https://github.com/dborth/fceugx.git
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501 lines
9.4 KiB
C
501 lines
9.4 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2003 Xodnizel
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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 <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include "types.h"
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#include "x6502.h"
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#include "fceu.h"
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#include "ppu.h"
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#include "sound.h"
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#include "netplay.h"
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#include "general.h"
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#include "endian.h"
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#include "cart.h"
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#include "nsf.h"
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#include "fds.h"
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#include "ines.h"
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#include "unif.h"
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#include "cheat.h"
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#include "palette.h"
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#include "state.h"
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#include "video.h"
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#include "input.h"
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#include "file.h"
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#include "crc32.h"
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#include "vsuni.h"
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uint64 timestampbase;
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FCEUGI *FCEUGameInfo = NULL;
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void (*GameInterface)(int h);
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void (*GameStateRestore)(int version);
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readfunc ARead[0x10000];
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writefunc BWrite[0x10000];
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static readfunc *AReadG;
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static writefunc *BWriteG;
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static int RWWrap=0;
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static DECLFW(BNull)
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{
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}
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static DECLFR(ANull)
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{
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return(X.DB);
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}
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int AllocGenieRW(void)
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{
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if(!(AReadG=(readfunc *)malloc(0x8000*sizeof(readfunc))))
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return 0;
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if(!(BWriteG=(writefunc *)malloc(0x8000*sizeof(writefunc))))
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return 0;
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RWWrap=1;
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return 1;
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}
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void FlushGenieRW(void)
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{
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int32 x;
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if(RWWrap)
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{
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for(x=0;x<0x8000;x++)
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{
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ARead[x+0x8000]=AReadG[x];
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BWrite[x+0x8000]=BWriteG[x];
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}
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free(AReadG);
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free(BWriteG);
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AReadG=0;
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BWriteG=0;
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RWWrap=0;
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}
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}
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readfunc FASTAPASS(1) GetReadHandler(int32 a)
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{
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if(a>=0x8000 && RWWrap)
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return AReadG[a-0x8000];
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else
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return ARead[a];
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}
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void FASTAPASS(3) SetReadHandler(int32 start, int32 end, readfunc func)
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{
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int32 x;
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if(!func)
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func=ANull;
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if(RWWrap)
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for(x=end;x>=start;x--)
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{
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if(x>=0x8000)
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AReadG[x-0x8000]=func;
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else
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ARead[x]=func;
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}
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else
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for(x=end;x>=start;x--)
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ARead[x]=func;
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}
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writefunc FASTAPASS(1) GetWriteHandler(int32 a)
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{
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if(RWWrap && a>=0x8000)
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return BWriteG[a-0x8000];
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else
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return BWrite[a];
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}
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void FASTAPASS(3) SetWriteHandler(int32 start, int32 end, writefunc func)
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{
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int32 x;
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if(!func)
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func=BNull;
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if(RWWrap)
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for(x=end;x>=start;x--)
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{
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if(x>=0x8000)
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BWriteG[x-0x8000]=func;
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else
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BWrite[x]=func;
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}
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else
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for(x=end;x>=start;x--)
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BWrite[x]=func;
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}
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uint8 GameMemBlock[131072];
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uint8 RAM[0x800];
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uint8 PAL=0;
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static DECLFW(BRAML)
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{
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RAM[A]=V;
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}
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static DECLFW(BRAMH)
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{
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RAM[A&0x7FF]=V;
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}
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static DECLFR(ARAML)
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{
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return RAM[A];
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}
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static DECLFR(ARAMH)
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{
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return RAM[A&0x7FF];
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}
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static void CloseGame(void)
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{
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if(FCEUGameInfo)
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{
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//if(FCEUnetplay)
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// FCEUD_NetworkClose();
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if(FCEUGameInfo->name)
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{
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free(FCEUGameInfo->name);
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FCEUGameInfo->name=0;
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}
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if(FCEUGameInfo->type!=GIT_NSF)
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FCEU_FlushGameCheats(0,0);
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GameInterface(GI_CLOSE);
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ResetExState(0,0);
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//CloseGenie();
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free(FCEUGameInfo);
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FCEUGameInfo = 0;
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}
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}
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void ResetGameLoaded(void)
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{
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if(FCEUGameInfo) CloseGame();
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GameStateRestore=0;
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PPU_hook=0;
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GameHBIRQHook=0;
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if(GameExpSound.Kill)
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GameExpSound.Kill();
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memset(&GameExpSound,0,sizeof(GameExpSound));
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MapIRQHook=0;
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MMC5Hack=0;
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PAL&=1;
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pale=0;
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}
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int UNIFLoad(const char *name, FCEUFILE *fp);
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int iNESLoad(const char *name, FCEUFILE *fp);
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int FDSLoad(const char *name, FCEUFILE *fp);
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int NSFLoad(FCEUFILE *fp);
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FCEUGI *FCEUI_LoadGame(const char *name)
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{
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FCEUFILE *fp;
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char *ipsfn;
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ResetGameLoaded();
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FCEUGameInfo = malloc(sizeof(FCEUGI));
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memset(FCEUGameInfo, 0, sizeof(FCEUGI));
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FCEUGameInfo->soundchan = 0;
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FCEUGameInfo->soundrate = 0;
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FCEUGameInfo->name=0;
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FCEUGameInfo->type=GIT_CART;
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FCEUGameInfo->vidsys=GIV_USER;
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FCEUGameInfo->input[0]=FCEUGameInfo->input[1]=-1;
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FCEUGameInfo->inputfc=-1;
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FCEUGameInfo->cspecial=0;
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FCEU_printf("Loading %s...\n\n",name);
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GetFileBase(name);
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ipsfn=FCEU_MakeFName(FCEUMKF_IPS,0,0);
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fp=FCEU_fopen(name,ipsfn,"rb",0);
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free(ipsfn);
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if(!fp)
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{
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FCEU_PrintError("Error opening \"%s\"!",name);
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return 0;
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}
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if(iNESLoad(name,fp))
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goto endlseq;
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if(NSFLoad(fp))
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goto endlseq;
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if(UNIFLoad(name,fp))
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goto endlseq;
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if(FDSLoad(name,fp))
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goto endlseq;
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FCEU_PrintError("An error occurred while loading the file.");
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FCEU_fclose(fp);
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return 0;
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endlseq:
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FCEU_fclose(fp);
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FCEU_ResetVidSys();
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if(FCEUGameInfo->type!=GIT_NSF)
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if(FSettings.GameGenie)
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OpenGenie();
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PowerNES();
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FCEUSS_CheckStates();
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if(FCEUGameInfo->type!=GIT_NSF)
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{
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FCEU_LoadGamePalette();
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FCEU_LoadGameCheats(0);
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}
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FCEU_ResetPalette();
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FCEU_ResetMessages(); // Save state, status messages, etc.
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return(FCEUGameInfo);
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}
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int FCEUI_Initialize(void)
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{
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if(!FCEU_InitVirtualVideo())
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return 0;
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memset(&FSettings,0,sizeof(FSettings));
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FSettings.UsrFirstSLine[0]=8;
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FSettings.UsrFirstSLine[1]=0;
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FSettings.UsrLastSLine[0]=231;
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FSettings.UsrLastSLine[1]=239;
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FSettings.SoundVolume=100;
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FCEUPPU_Init();
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X6502_Init();
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return 1;
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}
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void FCEUI_Kill(void)
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{
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FCEU_KillVirtualVideo();
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FCEU_KillGenie();
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}
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void FCEUI_Emulate(uint8 **pXBuf, int32 **SoundBuf, int32 *SoundBufSize, int skip)
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{
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int r,ssize;
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FCEU_UpdateInput();
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if(geniestage!=1) FCEU_ApplyPeriodicCheats();
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r=FCEUPPU_Loop(skip);
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ssize=FlushEmulateSound();
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timestampbase += timestamp;
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timestamp = 0;
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*pXBuf=skip?0:XBuf;
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*SoundBuf=WaveFinal;
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*SoundBufSize=ssize;
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}
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void FCEUI_CloseGame(void)
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{
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CloseGame();
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}
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void ResetNES(void)
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{
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if(!FCEUGameInfo) return;
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GameInterface(GI_RESETM2);
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FCEUSND_Reset();
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FCEUPPU_Reset();
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X6502_Reset();
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}
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void FCEU_MemoryRand(uint8 *ptr, uint32 size)
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{
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int x=0;
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while(size)
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{
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*ptr=(x&4)?0xFF:0x00;
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x++;
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size--;
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ptr++;
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}
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}
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void hand(X6502 *X, int type, unsigned int A)
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{
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}
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void PowerNES(void)
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{
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if(!FCEUGameInfo) return;
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FCEU_CheatResetRAM();
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FCEU_CheatAddRAM(2,0,RAM);
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GeniePower();
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FCEU_MemoryRand(RAM,0x800);
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//memset(RAM,0xFF,0x800);
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SetReadHandler(0x0000,0xFFFF,ANull);
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SetWriteHandler(0x0000,0xFFFF,BNull);
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SetReadHandler(0,0x7FF,ARAML);
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SetWriteHandler(0,0x7FF,BRAML);
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SetReadHandler(0x800,0x1FFF,ARAMH); /* Part of a little */
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SetWriteHandler(0x800,0x1FFF,BRAMH); /* hack for a small speed boost. */
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InitializeInput();
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FCEUSND_Power();
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FCEUPPU_Power();
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/* Have the external game hardware "powered" after the internal NES stuff.
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Needed for the NSF code and VS System code.
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*/
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GameInterface(GI_POWER);
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if(FCEUGameInfo->type==GIT_VSUNI)
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FCEU_VSUniPower();
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timestampbase=0;
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X6502_Power();
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FCEU_PowerCheats();
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}
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void FCEU_ResetVidSys(void)
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{
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int w;
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if(FCEUGameInfo->vidsys==GIV_NTSC)
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w=0;
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else if(FCEUGameInfo->vidsys==GIV_PAL)
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w=1;
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else
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w=FSettings.PAL;
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PAL=w?1:0;
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FCEUPPU_SetVideoSystem(w);
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SetSoundVariables();
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}
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FCEUS FSettings;
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void FCEU_printf(char *format, ...)
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{
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/*char temp[2048];
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va_list ap;
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va_start(ap,format);
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vsprintf(temp,format,ap);
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FCEUD_Message(temp);
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va_end(ap);*/
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}
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void FCEU_PrintError(char *format, ...)
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{
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/* char temp[2048];
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va_list ap;
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va_start(ap,format);
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vsprintf(temp,format,ap);
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FCEUD_PrintError(temp);
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va_end(ap);*/
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}
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void FCEUI_SetRenderedLines(int ntscf, int ntscl, int palf, int pall)
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{
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FSettings.UsrFirstSLine[0]=ntscf;
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FSettings.UsrLastSLine[0]=ntscl;
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FSettings.UsrFirstSLine[1]=palf;
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FSettings.UsrLastSLine[1]=pall;
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if(PAL)
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{
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FSettings.FirstSLine=FSettings.UsrFirstSLine[1];
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FSettings.LastSLine=FSettings.UsrLastSLine[1];
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}
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else
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{
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FSettings.FirstSLine=FSettings.UsrFirstSLine[0];
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FSettings.LastSLine=FSettings.UsrLastSLine[0];
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}
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}
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void FCEUI_SetVidSystem(int a)
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{
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FSettings.PAL=a?1:0;
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if(FCEUGameInfo)
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{
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FCEU_ResetVidSys();
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FCEU_ResetPalette();
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}
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}
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int FCEUI_GetCurrentVidSystem(int *slstart, int *slend)
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{
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if(slstart)
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*slstart=FSettings.FirstSLine;
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if(slend)
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*slend=FSettings.LastSLine;
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return(PAL);
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}
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void FCEUI_SetGameGenie(int a)
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{
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FSettings.GameGenie=a?1:0;
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}
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void FCEUI_SetSnapName(int a)
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{
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FSettings.SnapName=a;
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}
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int32 FCEUI_GetDesiredFPS(void)
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{
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if(PAL)
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return(838977920); // ~50.007
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else
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return(1008307711); // ~60.1
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}
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