vcs.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 #include "snes9x.h"
  42 #include "memmap.h"
  43 #include "ppu.h"
  44 #include "cpuexec.h"
  45
  46 #include "sa1.h"
  47 #define CPU SA1
  48 #define ICPU SA1ICPU\r
  49 //#define ICPU SA1
  50 #define Registers SA1Registers
  51 #define S9xGetByte S9xSA1GetByte
  52 #define S9xGetWord S9xSA1GetWord
  53 #define S9xSetByte S9xSA1SetByte
  54 #define S9xSetWord S9xSA1SetWord
  55 #define S9xSetPCBase S9xSA1SetPCBase
  56 #define S9xOpcodesM1X1 S9xSA1OpcodesM1X1
  57 #define S9xOpcodesM1X0 S9xSA1OpcodesM1X0
  58 #define S9xOpcodesM0X1 S9xSA1OpcodesM0X1
  59 #define S9xOpcodesM0X0 S9xSA1OpcodesM0X0
  60 #define S9xOpcode_IRQ S9xSA1Opcode_IRQ
  61 #define S9xOpcode_NMI S9xSA1Opcode_NMI
  62 #define S9xUnpackStatus S9xSA1UnpackStatus
  63 #define S9xPackStatus S9xSA1PackStatus
  64 #define S9xFixCycles S9xSA1FixCycles\r
  65 //CSNES Not even used\r
  66 /*
  67 #define Immediate8 SA1Immediate8
  68 #define Immediate16 SA1Immediate16
  69 #define Relative SA1Relative
  70 #define RelativeLong SA1RelativeLong
  71 #define AbsoluteIndexedIndirect SA1AbsoluteIndexedIndirect
  72 #define AbsoluteIndirectLong SA1AbsoluteIndirectLong
  73 #define AbsoluteIndirect SA1AbsoluteIndirect
  74 #define Absolute SA1Absolute
  75 #define AbsoluteLong SA1AbsoluteLong
  76 #define Direct SA1Direct
  77 #define DirectIndirectIndexed SA1DirectIndirectIndexed
  78 #define DirectIndirectIndexedLong SA1DirectIndirectIndexedLong
  79 #define DirectIndexedIndirect SA1DirectIndexedIndirect
  80 #define DirectIndexedX SA1DirectIndexedX
  81 #define DirectIndexedY SA1DirectIndexedY
  82 #define AbsoluteIndexedX SA1AbsoluteIndexedX
  83 #define AbsoluteIndexedY SA1AbsoluteIndexedY
  84 #define AbsoluteLongIndexedX SA1AbsoluteLongIndexedX
  85 #define DirectIndirect SA1DirectIndirect
  86 #define DirectIndirectLong SA1DirectIndirectLong
  87 #define StackRelative SA1StackRelative
  88 #define StackRelativeIndirectIndexed SA1StackRelativeIndirectIndexed\r
  89 */
  90
  91 //#undef CPU_SHUTDOWN
  92 #undef VAR_CYCLES
  93 #define SA1_OPCODES
  94
  95 #include "cpuops.cpp"
  96
  97 void S9xSA1MainLoop ()
  98 {
  99     int i;
 100
 101 #if 0
 102     if (SA1.Flags & NMI_FLAG)
 103     {
 104                 SA1.Flags &= ~NMI_FLAG;
 105                 if (SA1.WaitingForInterrupt)
 106                 {
 107                         SA1.WaitingForInterrupt = FALSE;
 108                         SA1.PC++;
 109                 }
 110                 S9xSA1Opcode_NMI ();
 111     }
 112 #endif
 113     if (SA1.Flags & IRQ_PENDING_FLAG)
 114     {
 115                 if (SA1.IRQActive)
 116                 {
 117                         if (SA1.WaitingForInterrupt)
 118                         {
 119                                 SA1.WaitingForInterrupt = FALSE;
 120                                 SA1.PC++;
 121                         }
 122                         if (!SA1CheckFlag (IRQ))
 123                                 S9xSA1Opcode_IRQ ();
 124                 }
 125                 else
 126                         SA1.Flags &= ~IRQ_PENDING_FLAG;
 127     }
 128 #ifdef DEBUGGER
 129     if (SA1.Flags & TRACE_FLAG)
 130     {
 131                 for (i = 0; i < 3 && SA1.Executing; i++)
 132                 {
 133                         S9xSA1Trace ();
 134 #ifdef CPU_SHUTDOWN
 135                     SA1.PCAtOpcodeStart = SA1.PC;
 136 #endif
 137                     (*SA1.S9xOpcodes [*SA1.PC++].S9xOpcode) (&SA1Registers, &SA1ICPU, &SA1);
 138                 }
 139     }
 140     else
 141 #endif
 142             for (i = 0; i < 3 && SA1.Executing; i++)
 143                 {
 144 #ifdef CPU_SHUTDOWN
 145                         SA1.PCAtOpcodeStart = SA1.PC;
 146 #endif
 147                         (*SA1ICPU.S9xOpcodes [*SA1.PC++].S9xOpcode) (&SA1Registers, &SA1ICPU, &SA1);
 148                 }
 149 }