Shamusworld >> Repos - virtualjaguar/blob - src/jaguar.cpp

   1 //
   2 // JAGUAR.CPP
   3 //
   4 // by Cal2
   5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
   6 // Cleanups and endian wrongness amelioration by James L. Hammons
   7 // Note: Endian wrongness probably stems from the MAME origins of this emu and
   8 //       the braindead way in which MAME handles memory. :-)
   9 //
  10
  11 #include "jaguar.h"
  12 #include "video.h"
  13 #include "settings.h"
  14 //#include "m68kdasmAG.h"
  15
  16 #define CPU_DEBUG
  17 //Do this in makefile??? Yes! Could, but it's easier to define here...
  18 #define LOG_UNMAPPED_MEMORY_ACCESSES
  19 #define CPU_DEBUG_MEMORY
  20
  21 // Private function prototypes
  22
  23 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who = UNKNOWN);
  24 unsigned jaguar_unknown_readword(unsigned address, uint32 who = UNKNOWN);
  25 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who = UNKNOWN);
  26 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who = UNKNOWN);
  27 void M68K_show_context(void);
  28
  29 // External variables
  30
  31 //extern bool hardwareTypeNTSC;                                         // Set to false for PAL
  32 #ifdef CPU_DEBUG_MEMORY
  33 extern bool startMemLog;                                                        // Set by "e" key
  34 extern int effect_start;
  35 extern int effect_start2, effect_start3, effect_start4, effect_start5, effect_start6;
  36 #endif
  37
  38 // Memory debugging identifiers
  39
  40 char * whoName[9] =
  41         { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
  42
  43 // These values are overridden by command line switches...
  44
  45 //extern bool dsp_enabled;
  46 //extern bool jaguar_use_bios;                                          // Default is now to USE the BIOS
  47 uint32 jaguar_active_memory_dumps = 0;
  48
  49 uint32 jaguar_mainRom_crc32;
  50
  51 /*static*/ uint8 * jaguar_mainRam = NULL;
  52 /*static*/ uint8 * jaguar_bootRom = NULL;
  53 /*static*/ uint8 * jaguar_mainRom = NULL;
  54 #ifdef CPU_DEBUG_MEMORY
  55 uint8 writeMemMax[0x400000], writeMemMin[0x400000];
  56 uint8 readMem[0x400000];
  57 uint32 returnAddr[4000], raPtr = 0xFFFFFFFF;
  58 #endif
  59
  60 //
  61 // Callback function to detect illegal instructions
  62 //
  63 //void GPUDumpDisassembly(void);
  64 //void GPUDumpRegisters(void);
  65 void M68KInstructionHook(void)
  66 {
  67         uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
  68 /*      if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
  69         {
  70                 static char buffer[2048];
  71                 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
  72                 WriteLog("%08X: %s", m68kPC, buffer);
  73                 WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
  74                         m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
  75                         m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
  76         }//*/
  77 /*      if (m68kPC == 0x8D0E48 && effect_start5)
  78         {
  79                 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
  80                 GPUDumpRegisters();
  81                 GPUDumpDisassembly();
  82                 log_done();
  83                 exit(0);
  84         }//*/
  85 /*      uint16 opcode = JaguarReadWord(m68kPC);
  86         if (opcode == 0x4E75)   // RTS
  87         {
  88                 if (startMemLog)
  89 //                      WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
  90                 {
  91                         uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
  92                         bool found = false;
  93                         if (raPtr != 0xFFFFFFFF)
  94                         {
  95                                 for(uint32 i=0; i<=raPtr; i++)
  96                                 {
  97                                         if (returnAddr[i] == addr)
  98                                         {
  99                                                 found = true;
 100                                                 break;
 101                                         }
 102                                 }
 103                         }
 104
 105                         if (!found)
 106                                 returnAddr[++raPtr] = addr;
 107                 }
 108         }//*/
 109
 110 /*      static char buffer[2048];
 111         m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
 112         WriteLog("%08X: %s \t\tD0=%08X, A0=%08X\n", m68kPC, buffer, m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_A0));//*/
 113
 114 /*      if (m68kPC == 0x803F16)
 115         {
 116                 WriteLog("M68K: Registers found at $803F16:\n");
 117                 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
 118                 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
 119                         WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
 120                 WriteLog("\n");
 121                 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
 122                         WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
 123         }*/
 124
 125         if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
 126         {
 127                 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
 128                 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
 129                 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
 130                 for(int i=0; i<10; i++)
 131                         WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
 132                 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
 133                 M68K_show_context();
 134                 log_done();
 135                 exit(0);
 136         }//*/
 137 }
 138
 139 //
 140 // Musashi 68000 read/write/IRQ functions
 141 //
 142
 143 int irq_ack_handler(int level)
 144 {
 145         int vector = M68K_INT_ACK_AUTOVECTOR;
 146
 147         // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
 148
 149         if (level == 7)
 150         {
 151                 m68k_set_irq(0);                                                // Clear the IRQ...
 152                 vector = 64;                                                    // Set user interrupt #0
 153         }
 154
 155         return vector;
 156 }
 157
 158 unsigned int m68k_read_memory_8(unsigned int address)
 159 {
 160 #ifdef CPU_DEBUG_MEMORY
 161         if ((address >= 0x000000) && (address <= 0x3FFFFF))
 162         {
 163                 if (startMemLog)
 164                         readMem[address] = 1;
 165         }
 166 #endif
 167 //WriteLog("[RM8] Addr: %08X\n", address);
 168         unsigned int retVal = 0;
 169
 170         if ((address >= 0x000000) && (address <= 0x3FFFFF))
 171                 retVal = jaguar_mainRam[address];
 172         else if ((address >= 0x800000) && (address <= 0xDFFFFF))
 173                 retVal = jaguar_mainRom[address - 0x800000];
 174         else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
 175                 retVal = jaguar_bootRom[address - 0xE00000];
 176         else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
 177                 retVal = CDROMReadByte(address);
 178         else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
 179                 retVal = TOMReadByte(address, M68K);
 180         else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
 181                 retVal = JERRYReadByte(address, M68K);
 182         else
 183                 retVal = jaguar_unknown_readbyte(address, M68K);
 184
 185     return retVal;
 186 }
 187
 188 void gpu_dump_disassembly(void);
 189 void gpu_dump_registers(void);
 190
 191 unsigned int m68k_read_memory_16(unsigned int address)
 192 {
 193 #ifdef CPU_DEBUG_MEMORY
 194 /*      if ((address >= 0x000000) && (address <= 0x3FFFFE))
 195         {
 196                 if (startMemLog)
 197                         readMem[address] = 1, readMem[address + 1] = 1;
 198         }//*/
 199 /*      if (effect_start && (address >= 0x8064FC && address <= 0x806501))
 200         {
 201                 return 0x4E71;  // NOP
 202         }
 203         if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
 204         {
 205                 return 0x4E71;  // NOP
 206         }
 207         if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
 208         {
 209                 return 0x4E71;  // NOP
 210         }
 211         if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
 212         {
 213                 return 0x4E71;  // NOP
 214         }
 215         if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
 216         {
 217                 return 0x4E71;  // NOP
 218         }
 219         if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
 220         {
 221                 return 0x4E71;  // NOP
 222         }//*/
 223 #endif
 224 //WriteLog("[RM16] Addr: %08X\n", address);
 225 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
 226 //      for(int i=0; i<10000; i++)
 227         WriteLog("[M68K] In routine #6!\n");//*/
 228 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
 229 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C)    // GPU Program #2
 230 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8)    // GPU Program #3
 231 {
 232         WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
 233         gpu_dump_registers();
 234         gpu_dump_disassembly();
 235 //      for(int i=0; i<10000; i++)
 236 //              WriteLog("[M68K] About to run GPU!\n");
 237 }//*/
 238 //WriteLog("[WM8  PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
 239 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
 240 {
 241         if (address == 0x000066A0)
 242         {
 243                 gpu_dump_registers();
 244                 gpu_dump_disassembly();
 245         }
 246         for(int i=0; i<10000; i++)
 247                 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
 248 }//*/
 249     unsigned int retVal = 0;
 250
 251         if ((address >= 0x000000) && (address <= 0x3FFFFE))
 252                 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
 253         else if ((address >= 0x800000) && (address <= 0xDFFFFE))
 254                 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
 255         else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
 256                 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
 257         else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
 258                 retVal = CDROMReadWord(address, M68K);
 259         else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
 260                 retVal = TOMReadWord(address, M68K);
 261         else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
 262                 retVal = JERRYReadWord(address, M68K);
 263         else
 264                 retVal = jaguar_unknown_readword(address, M68K);
 265
 266     return retVal;
 267 }
 268
 269 unsigned int m68k_read_memory_32(unsigned int address)
 270 {
 271 //WriteLog("--> [RM32]\n");
 272     return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
 273 }
 274
 275 void m68k_write_memory_8(unsigned int address, unsigned int value)
 276 {
 277 #ifdef CPU_DEBUG_MEMORY
 278         if ((address >= 0x000000) && (address <= 0x3FFFFF))
 279         {
 280                 if (startMemLog)
 281                 {
 282                         if (value > writeMemMax[address])
 283                                 writeMemMax[address] = value;
 284                         if (value < writeMemMin[address])
 285                                 writeMemMin[address] = value;
 286                 }
 287         }
 288 #endif
 289 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
 290 //      WriteLog("M68K: Writing %02X at %08X\n", value, address);
 291 //WriteLog("[WM8  PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
 292         if ((address >= 0x000000) && (address <= 0x3FFFFF))
 293                 jaguar_mainRam[address] = value;
 294         else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
 295                 CDROMWriteByte(address, value, M68K);
 296         else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
 297                 TOMWriteByte(address, value, M68K);
 298         else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
 299                 JERRYWriteByte(address, value, M68K);
 300         else
 301                 jaguar_unknown_writebyte(address, value, M68K);
 302 }
 303
 304 void m68k_write_memory_16(unsigned int address, unsigned int value)
 305 {
 306 #ifdef CPU_DEBUG_MEMORY
 307         if ((address >= 0x000000) && (address <= 0x3FFFFE))
 308         {
 309                 if (startMemLog)
 310                 {
 311                         uint8 hi = value >> 8, lo = value & 0xFF;
 312
 313                         if (hi > writeMemMax[address])
 314                                 writeMemMax[address] = hi;
 315                         if (hi < writeMemMin[address])
 316                                 writeMemMin[address] = hi;
 317
 318                         if (lo > writeMemMax[address+1])
 319                                 writeMemMax[address+1] = lo;
 320                         if (lo < writeMemMin[address+1])
 321                                 writeMemMin[address+1] = lo;
 322                 }
 323         }
 324 #endif
 325 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
 326 //      WriteLog("M68K: Writing %04X at %08X\n", value, address);
 327 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
 328 //if (address >= 0xF02200 && address <= 0xF0229F)
 329 //      WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
 330 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
 331 //      WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
 332 /*extern uint32 totalFrames;
 333 if (address == 0xF02114)
 334         WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
 335 if (address == 0xF02110)
 336         WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
 337 //if (address >= 0xF03B00 && address <= 0xF03DFF)
 338 //      WriteLog("M68K: Writing %04X to %08X...\n", value, address);
 339
 340         if ((address >= 0x000000) && (address <= 0x3FFFFE))
 341         {
 342 /*              jaguar_mainRam[address] = value >> 8;
 343                 jaguar_mainRam[address + 1] = value & 0xFF;*/
 344                 SET16(jaguar_mainRam, address, value);
 345         }
 346         else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
 347                 CDROMWriteWord(address, value, M68K);
 348         else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
 349                 TOMWriteWord(address, value, M68K);
 350         else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
 351                 JERRYWriteWord(address, value, M68K);
 352         else
 353         {
 354                 jaguar_unknown_writeword(address, value, M68K);
 355                 WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
 356                         m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
 357                         m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
 358         }
 359 }
 360
 361 void m68k_write_memory_32(unsigned int address, unsigned int value)
 362 {
 363 //WriteLog("--> [WM32]\n");
 364         m68k_write_memory_16(address, value >> 16);
 365         m68k_write_memory_16(address + 2, value & 0xFFFF);
 366 }
 367
 368
 369 uint32 jaguar_get_handler(uint32 i)
 370 {
 371         return JaguarReadLong(i * 4);
 372 }
 373
 374 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
 375 {
 376         uint32 handler = jaguar_get_handler(i);
 377         if (handler && (handler != 0xFFFFFFFF))
 378                 return 1;
 379         else
 380                 return 0;
 381 }
 382
 383 void M68K_show_context(void)
 384 {
 385         WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
 386         for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
 387                 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
 388         WriteLog("\n");
 389         for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
 390                 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
 391
 392         WriteLog("68K disasm\n");
 393 //      jaguar_dasm(s68000readPC()-0x1000,0x20000);
 394         jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
 395 //      jaguar_dasm(0x5000, 0x14414);
 396
 397         WriteLog("..................\n");
 398
 399         if (tom_irq_enabled(IRQ_VBLANK))
 400         {
 401                 WriteLog("vblank int: enabled\n");
 402                 jaguar_dasm(jaguar_get_handler(64), 0x200);
 403         }
 404         else
 405                 WriteLog("vblank int: disabled\n");
 406
 407         WriteLog("..................\n");
 408
 409         for(int i=0; i<256; i++)
 410                 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
 411 }
 412
 413 //
 414 // Unknown read/write byte/word routines
 415 //
 416
 417 // It's hard to believe that developers would be sloppy with their memory writes, yet in
 418 // some cases the developers screwed up royal. E.g., Club Drive has the following code:
 419 //
 420 // 807EC4: movea.l #$f1b000, A1
 421 // 807ECA: movea.l #$8129e0, A0
 422 // 807ED0: move.l  A0, D0
 423 // 807ED2: move.l  #$f1bb94, D1
 424 // 807ED8: sub.l   D0, D1
 425 // 807EDA: lsr.l   #2, D1
 426 // 807EDC: move.l  (A0)+, (A1)+
 427 // 807EDE: dbra    D1, 807edc
 428 //
 429 // The problem is at $807ED0--instead of putting A0 into D0, they really meant to put A1
 430 // in. This mistake causes it to try and overwrite approximately $700000 worth of address
 431 // space! (That is, unless the 68K causes a bus error...)
 432
 433 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
 434 {
 435 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
 436         WriteLog("Jaguar: Unknown byte %02X written at %08X by %s (M68K PC=%06X)\n", data, address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
 437         extern bool finished;
 438         finished = true;
 439         extern bool doDSPDis;
 440         if (who == DSP)
 441                 doDSPDis = true;
 442 #endif
 443 }
 444
 445 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
 446 {
 447 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
 448         WriteLog("Jaguar: Unknown word %04X written at %08X by %s (M68K PC=%06X)\n", data, address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
 449         extern bool finished;
 450         finished = true;
 451         extern bool doDSPDis;
 452         if (who == DSP)
 453                 doDSPDis = true;
 454 #endif
 455 }
 456
 457 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
 458 {
 459 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
 460         WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
 461         extern bool finished;
 462         finished = true;
 463         extern bool doDSPDis;
 464         if (who == DSP)
 465                 doDSPDis = true;
 466 #endif
 467     return 0xFF;
 468 }
 469
 470 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
 471 {
 472 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
 473         WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
 474         extern bool finished;
 475         finished = true;
 476         extern bool doDSPDis;
 477         if (who == DSP)
 478                 doDSPDis = true;
 479 #endif
 480     return 0xFFFF;
 481 }
 482
 483 //
 484 // Disassemble M68K instructions at the given offset
 485 //
 486
 487 unsigned int m68k_read_disassembler_8(unsigned int address)
 488 {
 489         return m68k_read_memory_8(address);
 490 }
 491
 492 unsigned int m68k_read_disassembler_16(unsigned int address)
 493 {
 494         return m68k_read_memory_16(address);
 495 }
 496
 497 unsigned int m68k_read_disassembler_32(unsigned int address)
 498 {
 499         return m68k_read_memory_32(address);
 500 }
 501
 502 void jaguar_dasm(uint32 offset, uint32 qt)
 503 {
 504 #ifdef CPU_DEBUG
 505         static char buffer[2048];//, mem[64];
 506         int pc = offset, oldpc;
 507
 508         for(uint32 i=0; i<qt; i++)
 509         {
 510 /*              oldpc = pc;
 511                 for(int j=0; j<64; j++)
 512                         mem[j^0x01] = jaguar_byte_read(pc + j);
 513
 514                 pc += Dasm68000((char *)mem, buffer, 0);
 515                 WriteLog("%08X: %s\n", oldpc, buffer);//*/
 516                 oldpc = pc;
 517                 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
 518                 WriteLog("%08X: %s\n", oldpc, buffer);//*/
 519         }
 520 #endif
 521 }
 522
 523 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
 524 {
 525         uint8 data = 0x00;
 526
 527         offset &= 0xFFFFFF;
 528         if (offset < 0x400000)
 529                 data = jaguar_mainRam[offset & 0x3FFFFF];
 530         else if ((offset >= 0x800000) && (offset < 0xC00000))
 531                 data = jaguar_mainRom[offset - 0x800000];
 532         else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
 533                 data = CDROMReadByte(offset, who);
 534         else if ((offset >= 0xE00000) && (offset < 0xE40000))
 535                 data = jaguar_bootRom[offset & 0x3FFFF];
 536         else if ((offset >= 0xF00000) && (offset < 0xF10000))
 537                 data = TOMReadByte(offset, who);
 538         else if ((offset >= 0xF10000) && (offset < 0xF20000))
 539                 data = JERRYReadByte(offset, who);
 540         else
 541                 data = jaguar_unknown_readbyte(offset, who);
 542
 543         return data;
 544 }
 545
 546 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
 547 {
 548         offset &= 0xFFFFFF;
 549         if (offset <= 0x3FFFFE)
 550         {
 551                 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
 552         }
 553         else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
 554         {
 555                 offset -= 0x800000;
 556                 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
 557         }
 558 //      else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
 559         else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
 560                 return CDROMReadWord(offset, who);
 561         else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
 562                 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
 563         else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
 564                 return TOMReadWord(offset, who);
 565         else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
 566                 return JERRYReadWord(offset, who);
 567
 568         return jaguar_unknown_readword(offset, who);
 569 }
 570
 571 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
 572 {
 573         offset &= 0xFFFFFF;
 574         if (offset < 0x400000)
 575         {
 576                 jaguar_mainRam[offset & 0x3FFFFF] = data;
 577                 return;
 578         }
 579         else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
 580         {
 581                 CDROMWriteByte(offset, data, who);
 582                 return;
 583         }
 584         else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
 585         {
 586                 TOMWriteByte(offset, data, who);
 587                 return;
 588         }
 589         else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
 590         {
 591                 JERRYWriteByte(offset, data, who);
 592                 return;
 593         }
 594
 595         jaguar_unknown_writebyte(offset, data, who);
 596 }
 597
 598 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
 599 {
 600 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
 601 // PLUS, you would handle this in the GPU/DSP WriteLong code! Not here!
 602         offset &= 0xFFFFFF;
 603
 604         if (offset <= 0x3FFFFE)
 605         {
 606 //This MUST be done by the 68K!
 607 /*if (offset == 0x670C)
 608         WriteLog("Jaguar: %s writing to location $670C...\n", whoName[who]);*/
 609
 610                 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
 611                 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
 612                 return;
 613         }
 614         else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
 615         {
 616                 CDROMWriteWord(offset, data, who);
 617                 return;
 618         }
 619         else if (offset >= 0xF00000 && offset <= 0xF0FFFE)
 620         {
 621                 TOMWriteWord(offset, data, who);
 622                 return;
 623         }
 624         else if (offset >= 0xF10000 && offset <= 0xF1FFFE)
 625         {
 626                 JERRYWriteWord(offset, data, who);
 627                 return;
 628         }
 629         // Don't bomb on attempts to write to ROM
 630         else if (offset >= 0x800000 && offset <= 0xEFFFFF)
 631                 return;
 632
 633         jaguar_unknown_writeword(offset, data, who);
 634 }
 635
 636 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
 637 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
 638 {
 639         return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
 640 }
 641
 642 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
 643 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
 644 {
 645         JaguarWriteWord(offset, data >> 16, who);
 646         JaguarWriteWord(offset+2, data & 0xFFFF, who);
 647 }
 648
 649 //
 650 // Jaguar console initialization
 651 //
 652 void jaguar_init(void)
 653 {
 654 #ifdef CPU_DEBUG_MEMORY
 655         memset(readMem, 0x00, 0x400000);
 656         memset(writeMemMin, 0xFF, 0x400000);
 657         memset(writeMemMax, 0x00, 0x400000);
 658 #endif
 659         memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
 660         memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
 661         memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
 662         memset(jaguar_mainRam, 0x00, 0x400000);
 663 //      memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
 664 //      memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
 665 //NOTE: This *doesn't* fix FlipOut...
 666         memset(jaguar_mainRom, 0x01, 0x600000); // & set it to all 01s...
 667
 668 //      cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
 669 //      cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
 670 //      cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
 671 //      cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
 672 //      cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
 673 //      cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
 674
 675         m68k_set_cpu_type(M68K_CPU_TYPE_68000);
 676         gpu_init();
 677         DSPInit();
 678         tom_init();
 679         jerry_init();
 680         cdrom_init();
 681 }
 682
 683 void jaguar_done(void)
 684 {
 685 #ifdef CPU_DEBUG_MEMORY
 686 /*      WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
 687         jaguar_dasm(0x8D0D44, 5000);
 688         WriteLog("\n");//*/
 689 /*      WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
 690         jaguar_dasm(0x806300, 5000);
 691         WriteLog("\n");//*/
 692
 693 /*      WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
 694
 695         for(uint32 i=0; i<=raPtr; i++)
 696         {
 697                 WriteLog("\t%08X\n", returnAddr[i]);
 698                 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
 699                 jaguar_dasm(returnAddr[i] - 16, 16);
 700                 WriteLog("\n");
 701         }
 702         WriteLog("\n");//*/
 703
 704 /*      int start = 0, end = 0;
 705         bool endTriggered = false, startTriggered = false;
 706         for(int i=0; i<0x400000; i++)
 707         {
 708                 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
 709                 {
 710                         if (!startTriggered)
 711                                 startTriggered = true, endTriggered = false, start = i;
 712
 713                         WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
 714                 }
 715                 else
 716                 {
 717                         if (!endTriggered)
 718                         {
 719                                 end = i - 1, endTriggered = true, startTriggered = false;
 720                                 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
 721                         }
 722                 }
 723         }
 724         WriteLog("\n");//*/
 725 #endif
 726 //#ifdef CPU_DEBUG
 727 //      for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
 728 //              WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
 729         int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
 730         WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
 731         for(int i=-2; i<9; i++)
 732                 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
 733
 734 /*      WriteLog("\nM68000 disassembly at $802288...\n");
 735         jaguar_dasm(0x802288, 3);
 736         WriteLog("\nM68000 disassembly at $802200...\n");
 737         jaguar_dasm(0x802200, 500);
 738         WriteLog("\nM68000 disassembly at $802518...\n");
 739         jaguar_dasm(0x802518, 100);//*/
 740
 741 /*      WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
 742         jaguar_dasm(0x803F00, 500);
 743         WriteLog("\n");//*/
 744
 745 /*      WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
 746         jaguar_dasm(0x802B00, 500);
 747         WriteLog("\n");//*/
 748
 749 /*      WriteLog("\n\nM68000 disassembly at $809900 (look @ $8099F8)...\n");
 750         jaguar_dasm(0x809900, 500);
 751         WriteLog("\n");//*/
 752 //8099F8
 753 /*      WriteLog("\n\nDump of $8093C8:\n\n");
 754         for(int i=0x8093C8; i<0x809900; i+=4)
 755                 WriteLog("%06X: %08X\n", i, JaguarReadLong(i));//*/
 756 /*      WriteLog("\n\nM68000 disassembly at $90006C...\n");
 757         jaguar_dasm(0x90006C, 500);
 758         WriteLog("\n");//*/
 759
 760 //      WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
 761         WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
 762         WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
 763         M68K_show_context();
 764 //#endif
 765
 766         cd_bios_done();
 767         cdrom_done();
 768         gpu_done();
 769         DSPDone();
 770         tom_done();
 771         jerry_done();
 772
 773         memory_free(jaguar_mainRom);
 774         memory_free(jaguar_bootRom);
 775         memory_free(jaguar_mainRam);
 776 }
 777
 778 void jaguar_reset(void)
 779 {
 780         if (vjs.useJaguarBIOS)
 781                 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
 782         else
 783         {
 784                 SET32(jaguar_mainRam, 4, 0x00802000);
 785                 // Handle PD stuff...
 786                 // This should definitely go elsewhere (like in the cart load section)!
 787                 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
 788                 {
 789                         uint32 runAddress = GET32(jaguar_mainRom, 0x2A);
 790                         uint32 progLength = GET32(jaguar_mainRom, 0x02);
 791                         WriteLog("Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
 792                         memcpy(jaguar_mainRam + runAddress, jaguar_mainRom + 0x2E, progLength);
 793                         SET32(jaguar_mainRam, 4, runAddress);
 794                 }
 795         }
 796
 797 //      WriteLog("jaguar_reset():\n");
 798 //#ifdef SOUND_OUTPUT
 799 //      ws_audio_reset();
 800 //#endif
 801         cd_bios_reset();
 802         tom_reset();
 803         jerry_reset();
 804         gpu_reset();
 805         DSPReset();
 806         cdrom_reset();
 807     m68k_pulse_reset();                         // Reset the 68000
 808         WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
 809 }
 810
 811 //
 812 // Main Jaguar execution loop (1 frame)
 813 //
 814 void JaguarExecute(int16 * backbuffer, bool render)
 815 {
 816         uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
 817         uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
 818 //      uint16 vdb = TOMReadWord(0xF00046);
 819 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
 820 //      uint16 vbb = TOMReadWord(0xF00040);
 821 //It seems that they mean it when they say that VDE is the end of object processing.
 822 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
 823 //buffer and not to write any more pixels... !!! FIX !!!
 824 //      uint16 vde = TOMReadWord(0xF00048);
 825
 826         uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
 827         // Should these be hardwired or read from VP? Yes, from VP!
 828         uint32 M68KCyclesPerScanline
 829                 = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
 830         uint32 RISCCyclesPerScanline
 831                 = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
 832
 833         TOMResetBackbuffer(backbuffer);
 834 /*extern int effect_start;
 835 if (effect_start)
 836 {
 837         WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
 838 }//*/
 839
 840         for(uint16 i=0; i<vp; i++)
 841         {
 842                 // Increment the horizontal count (why? RNG?)
 843                 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
 844
 845                 TOMWriteWord(0xF00006, i);                                      // Write the VC
 846
 847                 if (i == vi)                                                            // Time for Vertical Interrupt?
 848                 {
 849                         if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
 850                         {
 851                                 // We don't have to worry about autovectors & whatnot because the Jaguar
 852                                 // tells you through its HW registers who sent the interrupt...
 853                                 tom_set_pending_video_int();
 854                                 m68k_set_irq(7);
 855                         }
 856                 }
 857
 858 //              uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
 859 //              if (invalid_instruction_address != 0x80000000)
 860 //                      cd_bios_process(invalid_instruction_address);
 861                 m68k_execute(M68KCyclesPerScanline);
 862                 // No CD handling... !!! FIX !!!
 863                 cd_bios_exec(i);        // NOTE: Ignores parameter...
 864                 TOMExecPIT(RISCCyclesPerScanline);
 865                 jerry_pit_exec(RISCCyclesPerScanline);
 866                 jerry_i2s_exec(RISCCyclesPerScanline);
 867                 gpu_exec(RISCCyclesPerScanline);
 868
 869                 if (vjs.DSPEnabled)
 870 //                      DSPExec(RISCCyclesPerScanline);
 871 // Do pipelined DSP execution (3 stage)...
 872                         DSPExecP2(RISCCyclesPerScanline);
 873
 874                 TOMExecScanline(i, render);
 875         }
 876 }
 877
 878 // Temp debugging stuff
 879
 880 void DumpMainMemory(void)
 881 {
 882         FILE * fp = fopen("./memdump.bin", "wb");
 883
 884         if (fp == NULL)
 885                 return;
 886
 887         fwrite(jaguar_mainRam, 1, 0x400000, fp);
 888         fclose(fp);
 889 }
 890
 891 uint8 * GetRamPtr(void)
 892 {
 893         return jaguar_mainRam;
 894 }