git.maemo.org Git - drnoksnes/blob - sa1cpu.cpp

   1 /*
   2  * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
   3  *
   4  * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
   5  *                           Jerremy Koot (jkoot@snes9x.com)
   6  *
   7  * Super FX C emulator code
   8  * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
   9  *                           Gary Henderson.
  10  * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
  11  *
  12  * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
  13  * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
  14  * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
  15  *
  16  * DOS port code contains the works of other authors. See headers in
  17  * individual files.
  18  *
  19  * Snes9x homepage: http://www.snes9x.com
  20  *
  21  * Permission to use, copy, modify and distribute Snes9x in both binary and
  22  * source form, for non-commercial purposes, is hereby granted without fee,
  23  * providing that this license information and copyright notice appear with
  24  * all copies and any derived work.
  25  *
  26  * This software is provided 'as-is', without any express or implied
  27  * warranty. In no event shall the authors be held liable for any damages
  28  * arising from the use of this software.
  29  *
  30  * Snes9x is freeware for PERSONAL USE only. Commercial users should
  31  * seek permission of the copyright holders first. Commercial use includes
  32  * charging money for Snes9x or software derived from Snes9x.
  33  *
  34  * The copyright holders request that bug fixes and improvements to the code
  35  * should be forwarded to them so everyone can benefit from the modifications
  36  * in future versions.
  37  *
  38  * Super NES and Super Nintendo Entertainment System are trademarks of
  39  * Nintendo Co., Limited and its subsidiary companies.
  40  */
  41
  42 #include "snes9x.h"
  43
  44 #ifdef USE_SA1
  45
  46 #include "memmap.h"
  47 #include "debug.h"
  48 #include "missing.h"
  49 #include "ppu.h"
  50 #include "cpuexec.h"
  51 #include "sa1.h"
  52
  53 #define CPU SA1
  54 #define ICPU SA1
  55
  56 #undef Registers
  57
  58 #define Registers SA1Registers
  59 #define S9xGetByte S9xSA1GetByte
  60 #define S9xGetWord S9xSA1GetWord
  61 #define S9xSetByte S9xSA1SetByte
  62 #define S9xSetWord S9xSA1SetWord
  63 #define S9xSetPCBase S9xSA1SetPCBase
  64 #define S9xOpcodesM1X1 S9xSA1OpcodesM1X1
  65 #define S9xOpcodesM1X0 S9xSA1OpcodesM1X0
  66 #define S9xOpcodesM0X1 S9xSA1OpcodesM0X1
  67 #define S9xOpcodesM0X0 S9xSA1OpcodesM0X0
  68 #define S9xOpcode_IRQ S9xSA1Opcode_IRQ
  69 #define S9xOpcode_NMI S9xSA1Opcode_NMI
  70 #define S9xUnpackStatus S9xSA1UnpackStatus
  71 #define S9xPackStatus S9xSA1PackStatus
  72 #define S9xFixCycles S9xSA1FixCycles
  73
  74 #if 0
  75 #define Immediate8 SA1Immediate8
  76 #define Immediate16 SA1Immediate16
  77 #define Relative SA1Relative
  78 #define RelativeLong SA1RelativeLong
  79 #define AbsoluteIndexedIndirect SA1AbsoluteIndexedIndirect
  80 #define AbsoluteIndirectLong SA1AbsoluteIndirectLong
  81 #define AbsoluteIndirect SA1AbsoluteIndirect
  82 #define Absolute SA1Absolute
  83 #define AbsoluteLong SA1AbsoluteLong
  84 #define Direct SA1Direct
  85 #define DirectIndirectIndexed SA1DirectIndirectIndexed
  86 #define DirectIndirectIndexedLong SA1DirectIndirectIndexedLong
  87 #define DirectIndexedIndirect SA1DirectIndexedIndirect
  88 #define DirectIndexedX SA1DirectIndexedX
  89 #define DirectIndexedY SA1DirectIndexedY
  90 #define AbsoluteIndexedX SA1AbsoluteIndexedX
  91 #define AbsoluteIndexedY SA1AbsoluteIndexedY
  92 #define AbsoluteLongIndexedX SA1AbsoluteLongIndexedX
  93 #define DirectIndirect SA1DirectIndirect
  94 #define DirectIndirectLong SA1DirectIndirectLong
  95 #define StackRelative SA1StackRelative
  96 #define StackRelativeIndirectIndexed SA1StackRelativeIndirectIndexed
  97 #endif
  98
  99 //#undef CPU_SHUTDOWN
 100 #undef VAR_CYCLES
 101 #define SA1_OPCODES
 102
 103 #include "65c816ops.inc"
 104
 105 void S9xSA1MainLoop ()
 106 {
 107     int i;
 108
 109 #if 0
 110     if (SA1.Flags & NMI_FLAG)
 111     {
 112                 SA1.Flags &= ~NMI_FLAG;
 113                 if (SA1.WaitingForInterrupt)
 114                 {
 115                         SA1.WaitingForInterrupt = FALSE;
 116                         SA1.PC++;
 117                 }
 118                 S9xSA1Opcode_NMI ();
 119     }
 120 #endif
 121     if (SA1.Flags & IRQ_PENDING_FLAG)
 122     {
 123                 if (SA1.IRQActive)
 124                 {
 125                         if (SA1.WaitingForInterrupt)
 126                         {
 127                                 SA1.WaitingForInterrupt = FALSE;
 128                                 SA1.PC++;
 129                         }
 130                         if (!SA1CheckFlag (IRQ))
 131                                 S9xSA1Opcode_IRQ ();
 132                 }
 133                 else
 134                         SA1.Flags &= ~IRQ_PENDING_FLAG;
 135     }
 136 #ifdef DEBUGGER
 137     if (SA1.Flags & TRACE_FLAG)
 138     {
 139                 for (i = 0; i < 3 && SA1.Executing; i++)
 140                 {
 141                         S9xSA1Trace ();
 142 #ifdef CPU_SHUTDOWN
 143                     SA1.PCAtOpcodeStart = SA1.PC;
 144 #endif
 145                     (*SA1.S9xOpcodes [*SA1.PC++].S9xOpcode)();
 146                 }
 147                 return;
 148     }
 149 #endif
 150         for (i = 0; i < 3 && SA1.Executing; i++)
 151         {
 152 #ifdef CPU_SHUTDOWN
 153                 SA1.PCAtOpcodeStart = SA1.PC;
 154 #endif
 155                 (*SA1.S9xOpcodes [*SA1.PC++].S9xOpcode)();
 156         }
 157 }
 158
 159 #endif
 160