From a6dc7abc9b8cc3986eda5a84141da7dc9e4e8f1a Mon Sep 17 00:00:00 2001 From: aliaspider Date: Wed, 29 Oct 2014 05:36:07 +0100 Subject: start moving everything to C --- source/cpu.c | 239 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 source/cpu.c (limited to 'source/cpu.c') diff --git a/source/cpu.c b/source/cpu.c new file mode 100644 index 0000000..2f9b4ae --- /dev/null +++ b/source/cpu.c @@ -0,0 +1,239 @@ +/******************************************************************************* + Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. + + (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and + Jerremy Koot (jkoot@snes9x.com) + + (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net) + + (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net), + funkyass (funkyass@spam.shaw.ca), + Joel Yliluoma (http://iki.fi/bisqwit/) + Kris Bleakley (codeviolation@hotmail.com), + Matthew Kendora, + Nach (n-a-c-h@users.sourceforge.net), + Peter Bortas (peter@bortas.org) and + zones (kasumitokoduck@yahoo.com) + + C4 x86 assembler and some C emulation code + (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com), + _Demo_ (_demo_@zsnes.com), and Nach + + C4 C++ code + (c) Copyright 2003 Brad Jorsch + + DSP-1 emulator code + (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson, + John Weidman, neviksti (neviksti@hotmail.com), + Kris Bleakley, Andreas Naive + + DSP-2 emulator code + (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and + Lord Nightmare (lord_nightmare@users.sourceforge.net + + OBC1 emulator code + (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) 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 (marcus@mc.pp.se) + + + 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 "snes9x.h" +#include "memmap.h" +#include "ppu.h" +#include "dsp1.h" +#include "cpuexec.h" +#include "apu.h" +#include "dma.h" +#include "sa1.h" +#include "cheats.h" +#include "srtc.h" +#include "sdd1.h" +#include "spc7110.h" +#include "obc1.h" + + +#ifndef ZSNES_FX +#include "fxemu.h" + +extern struct FxInit_s SuperFX; + +void S9xResetSuperFX () +{ + SuperFX.vFlags = 0; //FX_FLAG_ROM_BUFFER;// | FX_FLAG_ADDRESS_CHECKING; + FxReset (&SuperFX); +} +#endif + +void S9xResetCPU () +{ + ICPU.Registers.PB = 0; + ICPU.Registers.PC = S9xGetWord (0xFFFC); + ICPU.Registers.D.W = 0; + ICPU.Registers.DB = 0; + ICPU.Registers.SH = 1; + ICPU.Registers.SL = 0xFF; + ICPU.Registers.XH = 0; + ICPU.Registers.YH = 0; + ICPU.Registers.P.W = 0; + + ICPU.ShiftedPB = 0; + ICPU.ShiftedDB = 0; + SetFlags (MemoryFlag | IndexFlag | IRQ | Emulation); + ClearFlags (Decimal); + + CPU.Flags = CPU.Flags & (DEBUG_MODE_FLAG | TRACE_FLAG); + CPU.BranchSkip = FALSE; + CPU.NMIActive = FALSE; + CPU.IRQActive = FALSE; + CPU.WaitingForInterrupt = FALSE; + CPU.InDMA = FALSE; + CPU.WhichEvent = HBLANK_START_EVENT; + CPU.PC = NULL; + CPU.PCBase = NULL; + CPU.PCAtOpcodeStart = NULL; + CPU.WaitAddress = NULL; + CPU.WaitCounter = 0; + CPU.Cycles = 0; + CPU.NextEvent = Settings.HBlankStart; + CPU.V_Counter = 0; + CPU.MemSpeed = SLOW_ONE_CYCLE; + CPU.MemSpeedx2 = SLOW_ONE_CYCLE * 2; + CPU.FastROMSpeed = SLOW_ONE_CYCLE; + CPU.AutoSaveTimer = 0; + CPU.SRAMModified = FALSE; + // CPU.NMITriggerPoint = 4; // Set when ROM image loaded + CPU.BRKTriggered = FALSE; + //CPU.TriedInterleavedMode2 = FALSE; // Reset when ROM image loaded + CPU.NMICycleCount = 0; + CPU.IRQCycleCount = 0; + S9xSetPCBase (ICPU.Registers.PC); + + ICPU.S9xOpcodes = S9xOpcodesE1; + ICPU.CPUExecuting = TRUE; + + S9xUnpackStatus(); +} + +#ifdef ZSNES_FX +START_EXTERN_C +void S9xResetSuperFX (); +bool8 WinterGold = 0; +extern uint8 *C4Ram; +END_EXTERN_C +#endif + +void S9xReset (void) +{ + if (Settings.SuperFX) + S9xResetSuperFX (); + +#ifdef ZSNES_FX + WinterGold = Settings.WinterGold; +#endif + ZeroMemory (Memory.FillRAM, 0x8000); + memset (Memory.VRAM, 0x00, 0x10000); + memset (Memory.RAM, 0x55, 0x20000); + + if(Settings.SPC7110) + S9xSpc7110Reset(); + S9xResetCPU (); + S9xResetPPU (); + S9xResetSRTC (); + if (Settings.SDD1) + S9xResetSDD1 (); + + S9xResetDMA (); + S9xResetAPU (); + S9xResetDSP1 (); + S9xSA1Init (); + if (Settings.C4) + S9xInitC4 (); + S9xInitCheatData (); + if(Settings.OBC1) + ResetOBC1(); + +// Settings.Paused = FALSE; +} +void S9xSoftReset (void) +{ + if (Settings.SuperFX) + S9xResetSuperFX (); + +#ifdef ZSNES_FX + WinterGold = Settings.WinterGold; +#endif + ZeroMemory (Memory.FillRAM, 0x8000); + memset (Memory.VRAM, 0x00, 0x10000); + // memset (Memory.RAM, 0x55, 0x20000); + + if(Settings.SPC7110) + S9xSpc7110Reset(); + S9xResetCPU (); + S9xSoftResetPPU (); + S9xResetSRTC (); + if (Settings.SDD1) + S9xResetSDD1 (); + + S9xResetDMA (); + S9xResetAPU (); + S9xResetDSP1 (); + if(Settings.OBC1) + ResetOBC1(); + S9xSA1Init (); + if (Settings.C4) + S9xInitC4 (); + S9xInitCheatData (); + +// Settings.Paused = FALSE; +} + -- cgit v1.2.3