path: root/src/snes9x.h

/*
 * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 *
 * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
 *                           Jerremy Koot (jkoot@snes9x.com)
 *
 * Super FX C emulator code
 * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
 *                           Gary Henderson.
 * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
 *
 * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
 * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
 * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
 *
 * DOS port code 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.
 */
#ifndef _SNES9X_H_
#define _SNES9X_H_

#define VERSION "1.39"

#include <stdio.h>
#include <stdlib.h>

#include "port.h"
#include "65c816.h"
#include "messages.h"

#define ROM_NAME_LEN 23

#include "../libretro/memstream.h"
#define STREAM memstream_t *
#define READ_STREAM(p, l, s)     memstream_read(s, p, l)
#define WRITE_STREAM(p, l, s)    memstream_write(s, p, l)
#define OPEN_STREAM(f, m)        memstream_open()
#define CLOSE_STREAM(s)          memstream_close(s)
#define SEEK_STREAM(p,r,s)   memstream_seek(p,r,s)

/* SNES screen width and height */
#define SNES_WIDTH      256
#define SNES_HEIGHT     224
#define SNES_HEIGHT_EXTENDED  239
#define IMAGE_WIDTH     (Settings.SupportHiRes ? SNES_WIDTH * 2 : SNES_WIDTH)
#define IMAGE_HEIGHT    (Settings.SupportHiRes ? SNES_HEIGHT_EXTENDED * 2 : SNES_HEIGHT_EXTENDED)

#define SNES_MAX_NTSC_VCOUNTER  262
#define SNES_MAX_PAL_VCOUNTER   312
#define SNES_HCOUNTER_MAX  342
#define SPC700_TO_65C816_RATIO   2
#define AUTO_FRAMERATE     200

#define PPU_IGNORE_FIXEDCOLCHANGES        (1<<0)
#define PPU_IGNORE_WINDOW              (1<<1)
#define PPU_IGNORE_ADDSUB              (1<<2)
#define PPU_IGNORE_PALWRITE               (1<<3)
#define GFX_IGNORE_OBJ                 (1<<4)
#define GFX_IGNORE_BG0                 (1<<5)
#define GFX_IGNORE_BG1                 (1<<6)
#define GFX_IGNORE_BG2                 (1<<7)
#define GFX_IGNORE_BG3                 (1<<8)

// NTSC master clock signal 21.47727MHz
// PPU: master clock / 4
// 1 / PPU clock * 342 -> 63.695us
// 63.695us / (1 / 3.579545MHz) -> 228 cycles per scanline
// From Earth Worm Jim: APU executes an average of 65.14285714 cycles per
// scanline giving an APU clock speed of 1.022731096MHz

// PAL master clock signal 21.28137MHz
// PPU: master clock / 4
// 1 / PPU clock * 342 -> 64.281us
// 64.281us / (1 / 3.546895MHz) -> 228 cycles per scanline.

//#define SNES_SCANLINE_TIME (63.695e-6)
//#define SNES_CLOCK_SPEED (3579545)

//#define SNES_CLOCK_LEN (1.0 / SNES_CLOCK_SPEED)

//#define SNES_APUTIMER2_CYCLEx10000 ((uint32) 3355824)

#ifdef VAR_CYCLES
//#define SNES_CYCLES_PER_SCANLINE ((uint32) ((SNES_SCANLINE_TIME / SNES_CLOCK_LEN) * 6 + 0.5))
#define SNES_CYCLES_PER_SCANLINE ((uint32)(228*6))
#else
//#define SNES_CYCLES_PER_SCANLINE ((uint32) (SNES_SCANLINE_TIME / SNES_CLOCK_LEN + 0.5))
#define SNES_CYCLES_PER_SCANLINE ((uint32)(228))
#endif

#define SNES_TR_MASK     (1 << 4)
#define SNES_TL_MASK     (1 << 5)
#define SNES_X_MASK      (1 << 6)
#define SNES_A_MASK      (1 << 7)
#define SNES_RIGHT_MASK     (1 << 8)
#define SNES_LEFT_MASK      (1 << 9)
#define SNES_DOWN_MASK      (1 << 10)
#define SNES_UP_MASK     (1 << 11)
#define SNES_START_MASK     (1 << 12)
#define SNES_SELECT_MASK    (1 << 13)
#define SNES_Y_MASK      (1 << 14)
#define SNES_B_MASK      (1 << 15)

enum
{
   SNES_MULTIPLAYER5,
   SNES_JOYPAD,
   SNES_MOUSE_SWAPPED,
   SNES_MOUSE,
   SNES_SUPERSCOPE,
   SNES_JUSTIFIER,
   SNES_JUSTIFIER_2,
   SNES_MAX_CONTROLLER_OPTIONS
};

#define DEBUG_MODE_FLAG     (1 << 0)
#define TRACE_FLAG         (1 << 1)
#define SINGLE_STEP_FLAG    (1 << 2)
#define BREAK_FLAG         (1 << 3)
#define SCAN_KEYS_FLAG      (1 << 4)
#define SAVE_SNAPSHOT_FLAG  (1 << 5)
#define DELAYED_NMI_FLAG    (1 << 6)
#define NMI_FLAG        (1 << 7)
#define PROCESS_SOUND_FLAG  (1 << 8)
#define FRAME_ADVANCE_FLAG  (1 << 9)
#define DELAYED_NMI_FLAG2   (1 << 10)
#define IRQ_PENDING_FLAG    (1 << 11)

#ifdef VAR_CYCLES
#define ONE_CYCLE 6
#define SLOW_ONE_CYCLE 8
#define TWO_CYCLES 12
#else
#define ONE_CYCLE 1
#define SLOW_ONE_CYCLE 1
#define TWO_CYCLES 2
#endif


#undef MEMMAP_BLOCK_SIZE
#define MEMMAP_BLOCK_SIZE (0x1000)
#undef MEMMAP_NUM_BLOCKS
#define MEMMAP_NUM_BLOCKS (0x1000000 / MEMMAP_BLOCK_SIZE)

typedef struct
{
   uint32  Flags;               //0
   bool8   BranchSkip;          //4
   bool8   NMIActive;           //5
   bool8   IRQActive;           //6
   bool8   WaitingForInterrupt; //7
   SRegisters Regs;       //8
   //uint8  PB;            //8      --> status
   //uint8  DB;            //9
   //pair   P;             //10
   //pair   A;             //12
   //pair   D;             //14
   //pair   X;             //16
   //pair   S;             //18
   //pair   Y;             //20
   //uint16 PC;           //22
   uint8*   PC;              //24
   int32   Cycles;              //28
   uint8*   PCBase;          //32
   uint8*   PCAtOpcodeStart;    //36
   uint8*   WaitAddress;        //40
   uint32  WaitCounter;         //44
   volatile int32   NextEvent;           //48
   int32   V_Counter;           //52
   int32   MemSpeed;            //56
   int32   MemSpeedx2;          //60
   int32   FastROMSpeed;         //64
   uint32 AutoSaveTimer;        //68
   uint32 NMITriggerPoint;         //72
   uint32 NMICycleCount;        //76
   uint32 IRQCycleCount;        //80

   bool8   InDMA;               //84
   uint8   WhichEvent;          //85
   bool8  SRAMModified;       //86
   bool8  BRKTriggered;       //87
   uint32   _ARM_asm_reserved_1; //88  to stock current jmp table
   bool8  TriedInterleavedMode2;   //92
   bool8  _ARM_asm_padding1[3]; //93

   uint8*  Memory_Map;          //96
   uint8*  Memory_WriteMap;     //100
   uint32* Memory_MemorySpeed;     //104
   uint8*  Memory_BlockIsRAM;      //108
   uint8*  Memory_SRAM;         //112
   uint8*  Memory_BWRAM;        //116
   uint32  Memory_SRAMMask;     //120
   bool32  APU_APUExecuting;    //124
   bool32  _ARM_asm_padding2;      //128
   uint32  _PALMSOS_R9;         //132
   uint32  _PALMSOS_R10;        //136
   volatile int32 APU_Cycles;          //140 notaz
   void* DSPGet;
   void* DSPSet;
   int32 rstatus;
} SCPUState;


#define HBLANK_START_EVENT 0
#define HBLANK_END_EVENT 1
#define HTIMER_BEFORE_EVENT 2
#define HTIMER_AFTER_EVENT 3
#define NO_EVENT 4

typedef struct
{
   // CPU options
   bool8  APUEnabled;
   bool8  Shutdown;

   uint8  SoundSkipMethod;
   long   H_Max;
   long   HBlankStart;
   long   CyclesPercentage;
   bool8  DisableIRQ;
   bool8  Paused;
   bool8  ForcedPause;
   bool8  StopEmulation;

   // Tracing options
   bool8  TraceDMA;
   bool8  TraceHDMA;
   bool8  TraceVRAM;
   bool8  TraceUnknownRegisters;
   bool8  TraceDSP;

   // Joystick options
   bool8  SwapJoypads;
   bool8  JoystickEnabled;

   // ROM timing options (see also H_Max above)
   bool8  ForcePAL;
   bool8  ForceNTSC;
   bool8  PAL;
   uint32 FrameTimePAL;
   uint32 FrameTimeNTSC;
   uint32 FrameTime;
   uint32 SkipFrames;

   // ROM image options
   bool8  ForceLoROM;
   bool8  ForceHiROM;
   bool8  ForceHeader;
   bool8  ForceNoHeader;
   bool8  ForceInterleaved;
   bool8  ForceInterleaved2;
   bool8  ForceNotInterleaved;

   // Peripherial options
   bool8  ForceSuperFX;
   bool8  ForceNoSuperFX;
   bool8  ForceDSP1;
   bool8  ForceNoDSP1;
   bool8  ForceSA1;
   bool8  ForceNoSA1;
   bool8  ForceC4;
   bool8  ForceNoC4;
   bool8  ForceSDD1;
   bool8  ForceNoSDD1;
   bool8  MultiPlayer5;
   bool8  Mouse;
   bool8  SuperScope;
   bool8  SRTC;
   uint32 ControllerOption;

   bool8  ShutdownMaster;
   bool8  MultiPlayer5Master;
   bool8  SuperScopeMaster;
   bool8  MouseMaster;
   bool8  SuperFX;
   bool8  DSP1Master;
   bool8  SA1;
   bool8  C4;
   bool8  SDD1;

   // Sound options
   uint32 SoundPlaybackRate;
   bool8  TraceSoundDSP;
   bool8  Stereo;
   bool8  ReverseStereo;
   bool8  SixteenBitSound;
   int    SoundBufferSize;
   int    SoundMixInterval;
   bool8  SoundEnvelopeHeightReading;
   bool8  DisableSoundEcho;
   bool8  DisableSampleCaching;
   bool8  DisableMasterVolume;
   bool8  SoundSync;
   bool8  InterpolatedSound;
   bool8  ThreadSound;
   bool8  Mute;
   //    bool8  NextAPUEnabled;
   uint8  AltSampleDecode;
   bool8  FixFrequency;

   // Graphics options
   bool8  SixteenBit;
   bool8  Transparency;
   bool8  SupportHiRes;
   bool8  Mode7Interpolate;

   // SNES graphics options
   bool8  BGLayering;
   bool8  DisableGraphicWindows;
   bool8  ForceTransparency;
   bool8  ForceNoTransparency;
   bool8  DisableHDMA;
   bool8  DisplayFrameRate;

   // Others
   bool8  NetPlay;
   bool8  NetPlayServer;
   char   ServerName [128];
   int    Port;
   bool8  GlideEnable;
   bool8  OpenGLEnable;
   int32  AutoSaveDelay; // Time in seconds before S-RAM auto-saved if modified.
   bool8  ApplyCheats;
   bool8  TurboMode;
   uint32 TurboSkipFrames;
   uint32 AutoMaxSkipFrames;
   uint32 os9x_hack;

   // Fixes for individual games
   uint32 StrikeGunnerOffsetHack;
   bool8  ChuckRock;
   bool8  StarfoxHack;
   bool8  WinterGold;
   bool8  Dezaemon;
   bool8  WrestlemaniaArcade;
   bool8  BS; // Japanese Satellite System games.
   bool8  DaffyDuck;
   uint8  APURAMInitialValue;
   bool8  SDD1Pack;
#ifdef ASMCPU
   bool8 asmspc700;
#endif
   bool8 SpeedHacks;
} SSettings;

typedef struct
{
   uint8 NeedInit0x2137;
   uint8 umiharakawaseFix;
   uint8 alienVSpredetorFix;
   uint8 APU_OutPorts_ReturnValueFix;
   uint8 Old_Read0x4200;
   uint8 _0x213E_ReturnValue;
   uint8 TouhaidenControllerFix;
   uint8 SoundEnvelopeHeightReading2;
   uint8 SRAMInitialValue;
   uint8 Uniracers;
   uint8 Flintstones;
   uint8 Mode7Hack;
} SSNESGameFixes;

START_EXTERN_C
extern SSettings Settings;
extern SCPUState CPU;
extern SSNESGameFixes SNESGameFixes;
extern char String [513];

void S9xExit();
void S9xMessage(int type, int number, const char* message);
void S9xLoadSDD1Data();
END_EXTERN_C

enum
{
   PAUSE_NETPLAY_CONNECT = (1 << 0),
   PAUSE_TOGGLE_FULL_SCREEN = (1 << 1),
   PAUSE_EXIT = (1 << 2),
   PAUSE_MENU = (1 << 3),
   PAUSE_INACTIVE_WINDOW = (1 << 4),
   PAUSE_WINDOW_ICONISED = (1 << 5),
   PAUSE_RESTORE_GUI = (1 << 6),
   PAUSE_FREEZE_FILE = (1 << 7)
};
void S9xSetPause(uint32 mask);
void S9xClearPause(uint32 mask);

#ifndef MAX_PATH
#define MAX_PATH           255
#endif

#endif