mirror of
https://github.com/libretro/snes9x.git
synced 2024-12-14 12:38:37 +00:00
358 lines
9.8 KiB
C++
358 lines
9.8 KiB
C++
/***********************************************************************************
|
|
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
|
|
|
|
(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
|
|
Jerremy Koot (jkoot@snes9x.com)
|
|
|
|
(c) Copyright 2002 - 2004 Matthew Kendora
|
|
|
|
(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
|
|
|
|
(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
|
|
|
|
(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
|
|
|
|
(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
|
|
Kris Bleakley (codeviolation@hotmail.com)
|
|
|
|
(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
|
|
Nach (n-a-c-h@users.sourceforge.net),
|
|
|
|
(c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com)
|
|
|
|
(c) Copyright 2006 - 2007 nitsuja
|
|
|
|
(c) Copyright 2009 - 2017 BearOso,
|
|
OV2
|
|
|
|
(c) Copyright 2017 qwertymodo
|
|
|
|
(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
|
|
Daniel De Matteis
|
|
(Under no circumstances will commercial rights be given)
|
|
|
|
|
|
BS-X C emulator code
|
|
(c) Copyright 2005 - 2006 Dreamer Nom,
|
|
zones
|
|
|
|
C4 x86 assembler and some C emulation code
|
|
(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
|
|
Nach,
|
|
zsKnight (zsknight@zsnes.com)
|
|
|
|
C4 C++ code
|
|
(c) Copyright 2003 - 2006 Brad Jorsch,
|
|
Nach
|
|
|
|
DSP-1 emulator code
|
|
(c) Copyright 1998 - 2006 _Demo_,
|
|
Andreas Naive (andreasnaive@gmail.com),
|
|
Gary Henderson,
|
|
Ivar (ivar@snes9x.com),
|
|
John Weidman,
|
|
Kris Bleakley,
|
|
Matthew Kendora,
|
|
Nach,
|
|
neviksti (neviksti@hotmail.com)
|
|
|
|
DSP-2 emulator code
|
|
(c) Copyright 2003 John Weidman,
|
|
Kris Bleakley,
|
|
Lord Nightmare (lord_nightmare@users.sourceforge.net),
|
|
Matthew Kendora,
|
|
neviksti
|
|
|
|
DSP-3 emulator code
|
|
(c) Copyright 2003 - 2006 John Weidman,
|
|
Kris Bleakley,
|
|
Lancer,
|
|
z80 gaiden
|
|
|
|
DSP-4 emulator code
|
|
(c) Copyright 2004 - 2006 Dreamer Nom,
|
|
John Weidman,
|
|
Kris Bleakley,
|
|
Nach,
|
|
z80 gaiden
|
|
|
|
OBC1 emulator code
|
|
(c) Copyright 2001 - 2004 zsKnight,
|
|
pagefault (pagefault@zsnes.com),
|
|
Kris Bleakley
|
|
Ported from x86 assembler to C by sanmaiwashi
|
|
|
|
SPC7110 and RTC C++ emulator code used in 1.39-1.51
|
|
(c) Copyright 2002 Matthew Kendora with research by
|
|
zsKnight,
|
|
John Weidman,
|
|
Dark Force
|
|
|
|
SPC7110 and RTC C++ emulator code used in 1.52+
|
|
(c) Copyright 2009 byuu,
|
|
neviksti
|
|
|
|
S-DD1 C emulator code
|
|
(c) Copyright 2003 Brad Jorsch with research by
|
|
Andreas Naive,
|
|
John Weidman
|
|
|
|
S-RTC C emulator code
|
|
(c) Copyright 2001 - 2006 byuu,
|
|
John Weidman
|
|
|
|
ST010 C++ emulator code
|
|
(c) Copyright 2003 Feather,
|
|
John Weidman,
|
|
Kris Bleakley,
|
|
Matthew Kendora
|
|
|
|
Super FX x86 assembler emulator code
|
|
(c) Copyright 1998 - 2003 _Demo_,
|
|
pagefault,
|
|
zsKnight
|
|
|
|
Super FX C emulator code
|
|
(c) Copyright 1997 - 1999 Ivar,
|
|
Gary Henderson,
|
|
John Weidman
|
|
|
|
Sound emulator code used in 1.5-1.51
|
|
(c) Copyright 1998 - 2003 Brad Martin
|
|
(c) Copyright 1998 - 2006 Charles Bilyue'
|
|
|
|
Sound emulator code used in 1.52+
|
|
(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
|
|
|
|
S-SMP emulator code used in 1.54+
|
|
(c) Copyright 2016 byuu
|
|
|
|
SH assembler code partly based on x86 assembler code
|
|
(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
|
|
|
|
2xSaI filter
|
|
(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
|
|
|
|
HQ2x, HQ3x, HQ4x filters
|
|
(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
|
|
|
|
NTSC filter
|
|
(c) Copyright 2006 - 2007 Shay Green
|
|
|
|
GTK+ GUI code
|
|
(c) Copyright 2004 - 2017 BearOso
|
|
|
|
Win32 GUI code
|
|
(c) Copyright 2003 - 2006 blip,
|
|
funkyass,
|
|
Matthew Kendora,
|
|
Nach,
|
|
nitsuja
|
|
(c) Copyright 2009 - 2017 OV2
|
|
|
|
Mac OS GUI code
|
|
(c) Copyright 1998 - 2001 John Stiles
|
|
(c) Copyright 2001 - 2011 zones
|
|
|
|
Libretro port
|
|
(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
|
|
Daniel De Matteis
|
|
(Under no circumstances will commercial rights be given)
|
|
|
|
|
|
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/or 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 or it's derivatives.
|
|
|
|
Snes9x is freeware for PERSONAL USE only. Commercial users should
|
|
seek permission of the copyright holders first. Commercial use includes,
|
|
but is not limited to, charging money for Snes9x or software derived from
|
|
Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
|
|
using Snes9x as a promotion for your commercial product.
|
|
|
|
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 "snes9x.h"
|
|
#include "memmap.h"
|
|
#include "dma.h"
|
|
#include "apu/apu.h"
|
|
#include "fxemu.h"
|
|
#include "sdd1.h"
|
|
#include "srtc.h"
|
|
#include "snapshot.h"
|
|
#include "cheats.h"
|
|
#include "logger.h"
|
|
#ifdef DEBUGGER
|
|
#include "debug.h"
|
|
#endif
|
|
|
|
static void S9xResetCPU (void);
|
|
static void S9xSoftResetCPU (void);
|
|
|
|
|
|
static void S9xResetCPU (void)
|
|
{
|
|
S9xSoftResetCPU();
|
|
Registers.SL = 0xff;
|
|
Registers.P.W = 0;
|
|
Registers.A.W = 0;
|
|
Registers.X.W = 0;
|
|
Registers.Y.W = 0;
|
|
SetFlags(MemoryFlag | IndexFlag | IRQ | Emulation);
|
|
ClearFlags(Decimal);
|
|
}
|
|
|
|
static void S9xSoftResetCPU (void)
|
|
{
|
|
CPU.Cycles = 182; // Or 188. This is the cycle count just after the jump to the Reset Vector.
|
|
CPU.PrevCycles = CPU.Cycles;
|
|
CPU.V_Counter = 0;
|
|
CPU.Flags = CPU.Flags & (DEBUG_MODE_FLAG | TRACE_FLAG);
|
|
CPU.PCBase = NULL;
|
|
CPU.NMIPending = FALSE;
|
|
CPU.IRQLine = FALSE;
|
|
CPU.IRQTransition = FALSE;
|
|
CPU.IRQLastState = FALSE;
|
|
CPU.IRQExternal = FALSE;
|
|
CPU.IRQPending = Timings.IRQPendCount;
|
|
CPU.MemSpeed = SLOW_ONE_CYCLE;
|
|
CPU.MemSpeedx2 = SLOW_ONE_CYCLE * 2;
|
|
CPU.FastROMSpeed = SLOW_ONE_CYCLE;
|
|
CPU.InDMA = FALSE;
|
|
CPU.InHDMA = FALSE;
|
|
CPU.InDMAorHDMA = FALSE;
|
|
CPU.InWRAMDMAorHDMA = FALSE;
|
|
CPU.HDMARanInDMA = 0;
|
|
CPU.CurrentDMAorHDMAChannel = -1;
|
|
CPU.WhichEvent = HC_RENDER_EVENT;
|
|
CPU.NextEvent = Timings.RenderPos;
|
|
CPU.WaitingForInterrupt = FALSE;
|
|
CPU.AutoSaveTimer = 0;
|
|
CPU.SRAMModified = FALSE;
|
|
|
|
Registers.PBPC = 0;
|
|
Registers.PB = 0;
|
|
Registers.PCw = S9xGetWord(0xfffc);
|
|
OpenBus = Registers.PCh;
|
|
Registers.D.W = 0;
|
|
Registers.DB = 0;
|
|
Registers.SH = 1;
|
|
Registers.SL -= 3;
|
|
Registers.XH = 0;
|
|
Registers.YH = 0;
|
|
|
|
ICPU.ShiftedPB = 0;
|
|
ICPU.ShiftedDB = 0;
|
|
SetFlags(MemoryFlag | IndexFlag | IRQ | Emulation);
|
|
ClearFlags(Decimal);
|
|
|
|
Timings.InterlaceField = FALSE;
|
|
Timings.H_Max = Timings.H_Max_Master;
|
|
Timings.V_Max = Timings.V_Max_Master;
|
|
Timings.NMITriggerPos = 0xffff;
|
|
if (Model->_5A22 == 2)
|
|
Timings.WRAMRefreshPos = SNES_WRAM_REFRESH_HC_v2;
|
|
else
|
|
Timings.WRAMRefreshPos = SNES_WRAM_REFRESH_HC_v1;
|
|
|
|
S9xSetPCBase(Registers.PBPC);
|
|
|
|
ICPU.S9xOpcodes = S9xOpcodesE1;
|
|
ICPU.S9xOpLengths = S9xOpLengthsM1X1;
|
|
|
|
S9xUnpackStatus();
|
|
}
|
|
|
|
void S9xReset (void)
|
|
{
|
|
S9xResetSaveTimer(FALSE);
|
|
S9xResetLogger();
|
|
|
|
memset(Memory.RAM, 0x55, 0x20000);
|
|
memset(Memory.VRAM, 0x00, 0x10000);
|
|
memset(Memory.FillRAM, 0, 0x8000);
|
|
|
|
S9xResetBSX();
|
|
S9xResetCPU();
|
|
S9xResetPPU();
|
|
S9xResetDMA();
|
|
S9xResetAPU();
|
|
S9xResetMSU();
|
|
|
|
if (Settings.DSP)
|
|
S9xResetDSP();
|
|
if (Settings.SuperFX)
|
|
S9xResetSuperFX();
|
|
if (Settings.SA1)
|
|
S9xSA1Init();
|
|
if (Settings.SDD1)
|
|
S9xResetSDD1();
|
|
if (Settings.SPC7110)
|
|
S9xResetSPC7110();
|
|
if (Settings.C4)
|
|
S9xInitC4();
|
|
if (Settings.OBC1)
|
|
S9xResetOBC1();
|
|
if (Settings.SRTC)
|
|
S9xResetSRTC();
|
|
if (Settings.MSU1)
|
|
S9xMSU1Init();
|
|
|
|
S9xInitCheatData();
|
|
}
|
|
|
|
void S9xSoftReset (void)
|
|
{
|
|
S9xResetSaveTimer(FALSE);
|
|
|
|
memset(Memory.FillRAM, 0, 0x8000);
|
|
|
|
if (Settings.BS)
|
|
S9xResetBSX();
|
|
|
|
S9xSoftResetCPU();
|
|
S9xSoftResetPPU();
|
|
S9xResetDMA();
|
|
S9xSoftResetAPU();
|
|
S9xResetMSU();
|
|
|
|
if (Settings.DSP)
|
|
S9xResetDSP();
|
|
if (Settings.SuperFX)
|
|
S9xResetSuperFX();
|
|
if (Settings.SA1)
|
|
S9xSA1Init();
|
|
if (Settings.SDD1)
|
|
S9xResetSDD1();
|
|
if (Settings.SPC7110)
|
|
S9xResetSPC7110();
|
|
if (Settings.C4)
|
|
S9xInitC4();
|
|
if (Settings.OBC1)
|
|
S9xResetOBC1();
|
|
if (Settings.SRTC)
|
|
S9xResetSRTC();
|
|
if (Settings.MSU1)
|
|
S9xMSU1Init();
|
|
|
|
S9xInitCheatData();
|
|
}
|