unix.cpp

SFC游戏模拟器 snes9x 1.43 的原代码

/*******************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 
  (c) Copyright 1996 - 2002 Gary Henderson ([e-mail]) and
                            Jerremy Koot ([e-mail])

  (c) Copyright 2001 - 2004 John Weidman ([e-mail])

  (c) Copyright 2002 - 2004 Brad Jorsch ([e-mail]),
                            funkyass ([e-mail]),
                            Joel Yliluoma (http://iki.fi/bisqwit/)
                            Kris Bleakley ([e-mail]),
                            Matthew Kendora,
                            Nach ([e-mail]),
                            Peter Bortas ([e-mail]) and
                            zones ([e-mail])

  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003 zsKnight ([e-mail]),
                            _Demo_ ([e-mail]), and Nach

  C4 C++ code
  (c) Copyright 2003 Brad Jorsch

  DSP-1 emulator code
  (c) Copyright 1998 - 2004 Ivar ([e-mail]), _Demo_, Gary Henderson,
                            John Weidman, neviksti ([e-mail]),
                            Kris Bleakley, Andreas Naive

  DSP-2 emulator code
  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
                     Lord Nightmare ([e-mail]

  OBC1 emulator code
  (c) Copyright 2001 - 2004 zsKnight, pagefault ([e-mail]) and
                            Kris Bleakley
  Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code
  (c) Copyright 2002 Matthew Kendora with research by
                     zsKnight, John Weidman, and Dark Force

  S-DD1 C emulator code
  (c) Copyright 2003 Brad Jorsch with research by
                     Andreas Naive and John Weidman
 
  S-RTC C emulator code
  (c) Copyright 2001 John Weidman
  
  ST010 C++ emulator code
  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora

  Super FX x86 assembler emulator code 
  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 

  Super FX C emulator code 
  (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman


  SH assembler code partly based on x86 assembler code
  (c) Copyright 2002 - 2004 Marcus Comstedt ([e-mail]) 

 
  Specific ports contains the works of other authors. See headers in
  individual files.
 
  Snes9x homepage: http://www.snes9x.com
 
  Permission to use, copy, modify and distribute Snes9x in both binary and
  source form, for non-commercial purposes, is hereby granted without fee,
  providing that this license information and copyright notice appear with
  all copies and any derived work.
 
  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software.
 
  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes
  charging money for Snes9x or software derived from Snes9x.
 
  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.
 
  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
*******************************************************************************/
#include <signal.h>
#include <errno.h>

#include <stdlib.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/time.h>
/* FIXME: Linux alpha (aristocat) has a broken timercmp. Make testcase */
#if defined(__linux)
# ifndef timercmp
#  define timercmp(tvp, uvp, cmp)\
        ((tvp)->tv_sec cmp (uvp)->tv_sec ||\
        (tvp)->tv_sec == (uvp)->tv_sec &&\
        (tvp)->tv_usec cmp (uvp)->tv_usec)
# endif
#endif
#include <sys/types.h>
#include <ctype.h>
#include <dirent.h>

#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif

#ifdef USE_THREADS
#include <pthread.h>
#include <sched.h>

pthread_t thread;
pthread_mutex_t mutex;
#endif

#if !defined(NOSOUND) && defined(__linux)
#include <sys/soundcard.h>
#include <sys/mman.h>
#endif

#if !defined(NOSOUND) && defined(__sun)
#ifdef __SVR4
#include <sys/audioio.h>
#else
#include <sun/audioio.h>
#endif
#endif

//Breaks sol9 and probably others.
//#if defined(__sun) && defined(__GNUC__)
//typedef void (*SIG_PF)();
//#endif

#include "snes9x.h"
#include "memmap.h"
#include "debug.h"
#include "cpuexec.h"
#include "ppu.h"
#include "snapshot.h"
#include "apu.h"
#include "display.h"
#include "gfx.h"
#include "soundux.h"
#include "spc700.h"
#include "spc7110.h"

#ifdef SPCTOOL
#include "spctool/spc700.h"
extern "C" void TraceSPC (unsigned char *PC, unsigned short YA, unsigned char X,
			  SPCFlags PS, unsigned char *SP);
#endif

#ifdef _NETPLAY_SUPPORT
#include "netplay.h"
#endif

uint32 joypads [5] = {0};
int NumControllers = 5;

#ifdef JOYSTICK_SUPPORT
#if defined(__linux)
#include <linux/joystick.h>
int js_fd [4] = {-1, -1, -1, -1};
int js_map_button [4][16] = {
    {
	SNES_B_MASK, SNES_A_MASK, SNES_A_MASK,
	SNES_Y_MASK, SNES_X_MASK, SNES_B_MASK,
	SNES_TL_MASK, SNES_TR_MASK,
	SNES_START_MASK, SNES_SELECT_MASK, 0, 0, 0, 0, 0, 0
    },
    {
	SNES_B_MASK, SNES_A_MASK, SNES_A_MASK,
	SNES_Y_MASK, SNES_X_MASK, SNES_B_MASK,
	SNES_TL_MASK, SNES_TR_MASK,
	SNES_START_MASK, SNES_SELECT_MASK, 0, 0, 0, 0, 0, 0
    },
    {
	SNES_B_MASK, SNES_A_MASK, SNES_A_MASK,
	SNES_Y_MASK, SNES_X_MASK, SNES_B_MASK,
	SNES_TL_MASK, SNES_TR_MASK,
	SNES_START_MASK, SNES_SELECT_MASK, 0, 0, 0, 0, 0, 0
    },
    {
	SNES_B_MASK, SNES_A_MASK, SNES_A_MASK,
	SNES_Y_MASK, SNES_X_MASK, SNES_B_MASK,
	SNES_TL_MASK, SNES_TR_MASK,
	SNES_START_MASK, SNES_SELECT_MASK, 0, 0, 0, 0, 0, 0
    }
};

#if 0
SNES_A_MASK, SNES_B_MASK, SNES_X_MASK, SNES_Y_MASK,
		            SNES_TL_MASK, SNES_TR_MASK, SNES_START_MASK, SNES_SELECT_MASK,
			    0, 0, 0, 0, 0, 0, 0, 0},
			   {SNES_A_MASK, SNES_B_MASK, SNES_X_MASK, SNES_Y_MASK,
			    SNES_TL_MASK, SNES_TR_MASK, SNES_START_MASK, SNES_SELECT_MASK,
			    0, 0, 0, 0, 0, 0, 0, 0},
			   {SNES_A_MASK, SNES_B_MASK, SNES_X_MASK, SNES_Y_MASK,
			    SNES_TL_MASK, SNES_TR_MASK, SNES_START_MASK, SNES_SELECT_MASK,
			    0, 0, 0, 0, 0, 0, 0, 0},
			   {SNES_A_MASK, SNES_B_MASK, SNES_X_MASK, SNES_Y_MASK,
			    SNES_TL_MASK, SNES_TR_MASK, SNES_START_MASK, SNES_SELECT_MASK,
			    0, 0, 0, 0, 0, 0, 0, 0}};
#endif
char *js_device [4] = {"/dev/js0", "/dev/js1", "/dev/js2", "/dev/js3"};
#endif

void InitJoysticks ();
void ReadJoysticks ();
#endif

void InitTimer ();
void *S9xProcessSound (void *);

char *rom_filename = NULL;
char *snapshot_filename = NULL;
char *SDD1_pack = NULL;

//FIXME: I see no reason not to configureenable this for all Unixen
#if defined(DEBUGGER) && (defined(__linux) || defined(__sun))
static void sigbrkhandler(int)
{
    CPU.Flags |= DEBUG_MODE_FLAG;
    signal(SIGINT, (SIG_PF) sigbrkhandler);
}
#endif

void OutOfMemory ()
{
    fprintf (stderr, "Snes9X: Memory allocation failure -"
             " not enough RAM/virtual memory available.\n"
             "S9xExiting...\n");
    Memory.Deinit ();
    S9xDeinitAPU ();
    
    exit (1);
}

void S9xParseArg (char **argv, int &i, int argc)
{
#ifdef JOYSTICK_SUPPORT
    if (strcmp (argv [i], "-j") == 0 ||
	     strcasecmp (argv [i], "-nojoy") == 0)
	Settings.JoystickEnabled = FALSE;
    else if (strcasecmp (argv [i], "-joydev1") == 0)
    {
	if (i + 1 < argc)
	    js_device[0] = argv[++i];
	else
	    S9xUsage ();
    }
    else if (strcasecmp (argv [i], "-joydev2") == 0)
    {
	if (i + 1 < argc)
	    js_device[1] = argv[++i];
	else
	    S9xUsage ();
    }
    else if (strcasecmp (argv [i], "-joymap1") == 0)
    {
	if (i + 8 < argc)
	{
	    int t;

            for (t=0; t<15; t++)
                js_map_button [0][t] = 0;

	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_A_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_B_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_X_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_Y_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_TL_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_TR_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_START_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_SELECT_MASK;
	}
	else
	    S9xUsage ();
    }
    else if (strcasecmp (argv [i], "-joymap2") == 0)
    {
	if (i + 8 < argc)
	{
	    int t;

            for (t=0; t<15; t++)
                js_map_button [1][t] = 0;

	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_A_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_B_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_X_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_Y_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_TL_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_TR_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_START_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_SELECT_MASK;
	}
	else
	    S9xUsage ();
    }
    else if (strcasecmp (argv [i], "-joymap3") == 0)
    {
	if (i + 8 < argc)
	{
	    int t;

            for (t=0; t<15; t++)
                js_map_button [2][t] = 0;

	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_A_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_B_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_X_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_Y_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_TL_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_TR_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_START_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_SELECT_MASK;
	}
	else
	    S9xUsage ();
    }
    else if (strcasecmp (argv [i], "-joymap4") == 0)
    {
	if (i + 8 < argc)
	{
	    int t;

            for (t=0; t<15; t++)
                js_map_button [3][t] = 0;

	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_A_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_B_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_X_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_Y_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_TL_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_TR_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_START_MASK;
	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_SELECT_MASK;
	}
	else
	    S9xUsage ();
    }
    else 
#endif
    if (strcasecmp (argv [i], "-b") == 0 ||
	     strcasecmp (argv [i], "-bs") == 0 ||
	     strcasecmp (argv [i], "-buffersize") == 0)
    {
	if (i + 1 < argc)
	    Settings.SoundBufferSize = atoi (argv [++i]);
	else
	    S9xUsage ();
    }
    else if (strcmp (argv [i], "-l") == 0 ||
	     strcasecmp (argv [i], "-loadsnapshot") == 0)
    {
	if (i + 1 < argc)
	    snapshot_filename = argv [++i];
	else
	    S9xUsage ();
    }
    else if (strcasecmp (argv [i], "-sdd1-pack") == 0)
    {
	if (i + 1 < argc)
	    SDD1_pack = argv [++i];
	else
	    S9xUsage ();
    }
    else
	S9xParseDisplayArg (argv, i, argc);
}

#include "cheats.h"

int main (int argc, char **argv)
{
    if (argc < S9xMinCommandLineArgs ())
	S9xUsage ();
	
    ZeroMemory (&Settings, sizeof (Settings));

#ifdef JOYSTICK_SUPPORT
    Settings.JoystickEnabled = TRUE;
#else
    Settings.JoystickEnabled = FALSE;
#endif

    Settings.SoundPlaybackRate = 4;
    Settings.Stereo = TRUE;
    Settings.SoundBufferSize = 0;
    Settings.CyclesPercentage = 100;
    Settings.DisableSoundEcho = FALSE;
#ifndef NOSOUND
    Settings.APUEnabled = Settings.NextAPUEnabled = TRUE;
#else
    Settings.APUEnabled = Settings.NextAPUEnabled = FALSE;
#endif
    Settings.H_Max = SNES_CYCLES_PER_SCANLINE;
    Settings.SkipFrames = AUTO_FRAMERATE;
    Settings.ShutdownMaster = TRUE;
    Settings.FrameTimePAL = 20000;
    Settings.FrameTimeNTSC = 16667;
    Settings.FrameTime = Settings.FrameTimeNTSC;
    Settings.DisableSampleCaching = FALSE;
    Settings.DisableMasterVolume = FALSE;
    Settings.Mouse = TRUE;
    Settings.SuperScope = TRUE;
    Settings.MultiPlayer5 = TRUE;
    Settings.ControllerOption = SNES_JOYPAD;
    Settings.Transparency = FALSE;
    Settings.SixteenBit = FALSE;
    Settings.SupportHiRes = FALSE;
    Settings.NetPlay = FALSE;
    Settings.ServerName [0] = 0;
    Settings.ThreadSound = FALSE;
    Settings.AutoSaveDelay = 30;
#ifdef _NETPLAY_SUPPORT
    Settings.Port = NP_DEFAULT_PORT;
#endif
    Settings.ApplyCheats = TRUE;
    Settings.TurboMode = FALSE;
    Settings.TurboSkipFrames = 40;
    Settings.StretchScreenshots = 1;
    rom_filename = S9xParseArgs (argv, argc);

    Settings.Transparency = Settings.ForceTransparency;
    if (Settings.ForceNoTransparency)
	Settings.Transparency = FALSE;

    if (Settings.Transparency)
	Settings.SixteenBit = TRUE;

    Settings.HBlankStart = (256 * Settings.H_Max) / SNES_HCOUNTER_MAX;

    if (!Memory.Init () || !S9xInitAPU())
	OutOfMemory ();

    S9xInitSound (Settings.SoundPlaybackRate, Settings.Stereo,
                  Settings.SoundBufferSize);

    if (!Settings.APUEnabled)
	S9xSetSoundMute (TRUE);

    uint32 saved_flags = CPU.Flags;

#ifdef GFX_MULTI_FORMAT
    S9xSetRenderPixelFormat (RGB565);
#endif

    if (rom_filename)
    {
	if (!Memory.LoadROM (rom_filename))
	{
	    char dir [_MAX_DIR + 1];
	    char drive [_MAX_DRIVE + 1];
	    char name [_MAX_FNAME + 1];
	    char ext [_MAX_EXT + 1];
	    char fname [_MAX_PATH + 1];

	    _splitpath (rom_filename, drive, dir, name, ext);
	    _makepath (fname, drive, dir, name, ext);

	    strcpy (fname, S9xGetROMDirectory ());
	    strcat (fname, SLASH_STR);
	    strcat (fname, name);
	    if (ext [0])
	    {
		strcat (fname, ".");
		strcat (fname, ext);
	    }
	    _splitpath (fname, drive, dir, name, ext);
	    _makepath (fname, drive, dir, name, ext);
	    if (!Memory.LoadROM (fname))
	    {
		fprintf (stderr, "Error opening: %s\n", rom_filename);
		exit (1);
	    }
	}
	Memory.LoadSRAM (S9xGetFilename (".srm"));
	S9xLoadCheatFile (S9xGetFilename (".cht"));
    }
    else
    {
	S9xReset ();
	Settings.Paused |= 2;
    }
    CPU.Flags = saved_flags;

#if !defined(__MSDOS) && defined(DEBUGGER)
#if defined(__unix) && !defined(__NeXT__)
    struct sigaction sa;
#if defined(__linux)
    sa.sa_handler = sigbrkhandler;
#else
    sa.sa_handler = (SIG_PF) sigbrkhandler;
#endif

#ifdef SA_RESTART
    sa.sa_flags = SA_RESTART;
#else
    sa.sa_flags = 0;
#endif

    sigemptyset(&sa.sa_mask);
    sigaction(SIGINT, &sa, NULL);
#else
    signal(SIGINT, (SIG_PF) sigbrkhandler);
#endif
#endif

    S9xInitInputDevices ();

    S9xInitDisplay (argc, argv);
    if (!S9xGraphicsInit ())
	OutOfMemory ();
	
    S9xTextMode ();

#ifdef _NETPLAY_SUPPORT
    if (strlen (Settings.ServerName) == 0)
    {
	char *server = getenv ("S9XSERVER");
	if (server)
	{
	    strncpy (Settings.ServerName, server, 127);
	    Settings.ServerName [127] = 0;
	}
    }
    char *port = getenv ("S9XPORT");
    if (Settings.Port >= 0 && port)
	Settings.Port = atoi (port);
    else
    if (Settings.Port < 0)
	Settings.Port = -Settings.Port;

    if (Settings.NetPlay)
    {
	int player;

	if (!S9xNetPlayConnectToServer (Settings.ServerName, Settings.Port,
					Memory.ROMName, player))
	{
	    fprintf (stderr, "Failed to connected to Snes9x netplay"
                     " server \"%s\" on port %d.\n",
                     Settings.ServerName, Settings.Port);
	    S9xExit ();
	}
	fprintf (stderr, "Connected to \"%s\" on port %d as"
                 " player #%d playing \"%s\"\n",
		 Settings.ServerName, Settings.Port, player, Memory.ROMName);
    }
    
#endif

    if (snapshot_filename)
    {
	int Flags = CPU.Flags & (DEBUG_MODE_FLAG | TRACE_FLAG);
	if (!S9xLoadSnapshot (snapshot_filename))
	    exit (1);
	CPU.Flags |= Flags;
    }

    S9xGraphicsMode ();

    sprintf (String, "\"%s\" %s: %s", Memory.ROMName, TITLE, VERSION);
    S9xSetTitle (String);
    
#ifdef JOYSTICK_SUPPORT
    uint32 JoypadSkip = 0;
#endif

    InitTimer ();
    if (!Settings.APUEnabled)
	S9xSetSoundMute (FALSE);

    /* FIXME: Is someone using this dead code, or should it go? */