start moving everything to C

1 files changed, 239 insertions, 0 deletions

diff --git a/source/cpu.c b/source/cpu.c
new file mode 100644
index 0000000..2f9b4ae
--- /dev/null
+++ b/source/cpu.c
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+/*******************************************************************************
+  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;
+}
+