4 // Originally by David Raingeard (Cal2)
5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Carwin Jones (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. :-)
14 //#include "m68kdasmAG.h"
17 //Do this in makefile??? Yes! Could, but it's easier to define here...
18 //#define LOG_UNMAPPED_MEMORY_ACCESSES
19 //#define ABORT_ON_UNMAPPED_MEMORY_ACCESS
20 #define ABORT_ON_ILLEGAL_INSTRUCTIONS
21 //#define ABORT_ON_OFFICIAL_ILLEGAL_INSTRUCTION
22 #define CPU_DEBUG_MEMORY
24 // Private function prototypes
26 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who = UNKNOWN);
27 unsigned jaguar_unknown_readword(unsigned address, uint32 who = UNKNOWN);
28 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who = UNKNOWN);
29 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who = UNKNOWN);
30 void M68K_show_context(void);
34 //extern bool hardwareTypeNTSC; // Set to false for PAL
35 #ifdef CPU_DEBUG_MEMORY
36 extern bool startMemLog; // Set by "e" key
37 extern int effect_start;
38 extern int effect_start2, effect_start3, effect_start4, effect_start5, effect_start6;
41 // Memory debugging identifiers
44 { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
46 uint32 jaguar_active_memory_dumps = 0;
48 uint32 jaguar_mainRom_crc32, jaguarRomSize, jaguarRunAddress;
50 /*static*/ uint8 * jaguar_mainRam = NULL;
51 /*static*/ uint8 * jaguar_mainRom = NULL;
52 /*static*/ uint8 * jaguar_bootRom = NULL;
53 /*static*/ uint8 * jaguar_CDBootROM = NULL;
55 #ifdef CPU_DEBUG_MEMORY
56 uint8 writeMemMax[0x400000], writeMemMin[0x400000];
57 uint8 readMem[0x400000];
58 uint32 returnAddr[4000], raPtr = 0xFFFFFFFF;
61 uint32 pcQueue[0x400];
65 // Callback function to detect illegal instructions
67 void GPUDumpDisassembly(void);
68 void GPUDumpRegisters(void);
69 static bool start = false;
70 void M68KInstructionHook(void)
72 uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
75 // Ideally, we'd save all the registers as well...
76 pcQueue[pcQPtr++] = m68kPC;
79 if (m68kPC & 0x01) // Oops! We're fetching an odd address!
81 WriteLog("M68K: Attempted to execute from an odd adress!\n\nBacktrace:\n\n");
83 static char buffer[2048];
84 for(int i=0; i<0x400; i++)
86 m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], M68K_CPU_TYPE_68000);
87 WriteLog("\t%08X: %s\n", pcQueue[(pcQPtr + i) & 0x3FF], buffer);
91 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
92 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
93 for(int i=0; i<10; i++)
94 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
95 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
101 /* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
103 static char buffer[2048];
104 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
105 WriteLog("%08X: %s", m68kPC, buffer);
106 WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
107 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
108 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
110 /* if (m68kPC == 0x8D0E48 && effect_start5)
112 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
114 GPUDumpDisassembly();
118 /* uint16 opcode = JaguarReadWord(m68kPC);
119 if (opcode == 0x4E75) // RTS
122 // WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
124 uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
126 if (raPtr != 0xFFFFFFFF)
128 for(uint32 i=0; i<=raPtr; i++)
130 if (returnAddr[i] == addr)
139 returnAddr[++raPtr] = addr;
143 //Flip Out! debugging...
146 00805FDC: movea.l #$9c6f8, A0 D0=00100010, A0=00100000
147 00805FE2: move.w #$10, (A0)+ D0=00100010, A0=0009C6F8
148 00805FE6: cmpa.l #$c96f8, A0 D0=00100010, A0=0009C6FA
149 00805FEC: bne 805fe2 D0=00100010, A0=0009C6FA
151 0080603A: move.l #$11ed7c, $100.w D0=61700080, A0=000C96F8, D1=00000000, A1=000040D8
153 0012314C: move.l (A0)+, (A1)+ D0=61700080, A0=00124174, D1=00000000, A1=00F03FFC
154 0012314E: cmpa.l #$f04000, A1 D0=61700080, A0=00124178, D1=00000000, A1=00F04000
155 00123154: blt 12314c D0=61700080, A0=00124178, D1=00000000, A1=00F04000
156 00123156: move.l #$0, $f035d0.l D0=61700080, A0=00124178, D1=00000000, A1=00F04000
157 00123160: move.l #$f03000, $f02110.l D0=61700080, A0=00124178, D1=00000000, A1=00F04000
158 0012316A: move.l #$1, $f02114.l D0=61700080, A0=00124178, D1=00000000, A1=00F04000
159 00123174: rts D0=61700080, A0=00124178, D1=00000000, A1=00F04000
161 /* static char buffer[2048];
162 //if (m68kPC > 0x805F48) start = true;
163 //if (m68kPC > 0x806486) start = true;
164 //if (m68kPC == 0x805FEE) start = true;
165 //if (m68kPC == 0x80600C)// start = true;
166 if (m68kPC == 0x802058) start = true;
168 // GPUDumpRegisters();
169 // GPUDumpDisassembly();
171 // M68K_show_context();
177 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
178 WriteLog("%08X: %s \t\tD0=%08X, A0=%08X, D1=%08X, A1=%08X\n", m68kPC, buffer, m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_A1));
181 /* if (m68kPC == 0x803F16)
183 WriteLog("M68K: Registers found at $803F16:\n");
184 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
185 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
186 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
188 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
189 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
192 #ifdef ABORT_ON_ILLEGAL_INSTRUCTIONS
193 if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
195 #ifndef ABORT_ON_OFFICIAL_ILLEGAL_INSTRUCTION
196 if (m68k_read_memory_16(m68kPC) == 0x4AFC)
198 // This is a kludge to let homebrew programs work properly (i.e., let the other processors
199 // keep going even when the 68K dumped back to the debugger or what have you).
201 // m68k_set_reg(M68K_REG_PC, m68kPC - 2);
202 // Try setting the vector to the illegal instruction...
203 //This doesn't work right either! Do something else! Quick!
204 // SET32(jaguar_mainRam, 0x10, m68kPC);
210 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
211 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
212 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
213 for(int i=0; i<10; i++)
214 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
215 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
219 // WriteLog("\n\n68K disasm\n\n");
220 // jaguar_dasm(0x802000, 0x50C);
231 // Musashi 68000 read/write/IRQ functions
234 int irq_ack_handler(int level)
236 int vector = M68K_INT_ACK_AUTOVECTOR;
238 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
242 m68k_set_irq(0); // Clear the IRQ...
243 vector = 64; // Set user interrupt #0
249 unsigned int m68k_read_memory_8(unsigned int address)
251 #ifdef CPU_DEBUG_MEMORY
252 if ((address >= 0x000000) && (address <= 0x3FFFFF))
255 readMem[address] = 1;
258 //WriteLog("[RM8] Addr: %08X\n", address);
259 unsigned int retVal = 0;
261 if ((address >= 0x000000) && (address <= 0x3FFFFF))
262 retVal = jaguar_mainRam[address];
263 // else if ((address >= 0x800000) && (address <= 0xDFFFFF))
264 else if ((address >= 0x800000) && (address <= 0xDFFEFF))
265 retVal = jaguar_mainRom[address - 0x800000];
266 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
267 retVal = jaguar_bootRom[address - 0xE00000];
268 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
269 retVal = CDROMReadByte(address);
270 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
271 retVal = TOMReadByte(address, M68K);
272 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
273 retVal = JERRYReadByte(address, M68K);
275 retVal = jaguar_unknown_readbyte(address, M68K);
280 void gpu_dump_disassembly(void);
281 void gpu_dump_registers(void);
283 unsigned int m68k_read_memory_16(unsigned int address)
285 #ifdef CPU_DEBUG_MEMORY
286 /* if ((address >= 0x000000) && (address <= 0x3FFFFE))
289 readMem[address] = 1, readMem[address + 1] = 1;
291 /* if (effect_start && (address >= 0x8064FC && address <= 0x806501))
293 return 0x4E71; // NOP
295 if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
297 return 0x4E71; // NOP
299 if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
301 return 0x4E71; // NOP
303 if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
305 return 0x4E71; // NOP
307 if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
309 return 0x4E71; // NOP
311 if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
313 return 0x4E71; // NOP
316 //WriteLog("[RM16] Addr: %08X\n", address);
317 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
318 // for(int i=0; i<10000; i++)
319 WriteLog("[M68K] In routine #6!\n");//*/
320 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
321 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
322 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
324 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
325 gpu_dump_registers();
326 gpu_dump_disassembly();
327 // for(int i=0; i<10000; i++)
328 // WriteLog("[M68K] About to run GPU!\n");
330 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
331 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
333 if (address == 0x000066A0)
335 gpu_dump_registers();
336 gpu_dump_disassembly();
338 for(int i=0; i<10000; i++)
339 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
341 unsigned int retVal = 0;
343 if ((address >= 0x000000) && (address <= 0x3FFFFE))
344 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
345 // else if ((address >= 0x800000) && (address <= 0xDFFFFE))
346 else if ((address >= 0x800000) && (address <= 0xDFFEFE))
347 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
348 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
349 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
350 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
351 retVal = CDROMReadWord(address, M68K);
352 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
353 retVal = TOMReadWord(address, M68K);
354 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
355 retVal = JERRYReadWord(address, M68K);
357 retVal = jaguar_unknown_readword(address, M68K);
362 unsigned int m68k_read_memory_32(unsigned int address)
364 //WriteLog("--> [RM32]\n");
365 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
368 void m68k_write_memory_8(unsigned int address, unsigned int value)
370 #ifdef CPU_DEBUG_MEMORY
371 if ((address >= 0x000000) && (address <= 0x3FFFFF))
375 if (value > writeMemMax[address])
376 writeMemMax[address] = value;
377 if (value < writeMemMin[address])
378 writeMemMin[address] = value;
382 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
383 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
384 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
386 if (address >= 0x18FA70 && address < (0x18FA70 + 8000))
387 WriteLog("M68K: Byte %02X written at %08X by 68K\n", value, address);//*/
389 if ((address >= 0x000000) && (address <= 0x3FFFFF))
390 jaguar_mainRam[address] = value;
391 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
392 CDROMWriteByte(address, value, M68K);
393 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
394 TOMWriteByte(address, value, M68K);
395 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
396 JERRYWriteByte(address, value, M68K);
398 jaguar_unknown_writebyte(address, value, M68K);
401 void m68k_write_memory_16(unsigned int address, unsigned int value)
403 #ifdef CPU_DEBUG_MEMORY
404 if ((address >= 0x000000) && (address <= 0x3FFFFE))
408 uint8 hi = value >> 8, lo = value & 0xFF;
410 if (hi > writeMemMax[address])
411 writeMemMax[address] = hi;
412 if (hi < writeMemMin[address])
413 writeMemMin[address] = hi;
415 if (lo > writeMemMax[address+1])
416 writeMemMax[address+1] = lo;
417 if (lo < writeMemMin[address+1])
418 writeMemMin[address+1] = lo;
422 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
423 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
424 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
425 //if (address >= 0xF02200 && address <= 0xF0229F)
426 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
427 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
428 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
429 /*extern uint32 totalFrames;
430 if (address == 0xF02114)
431 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
432 if (address == 0xF02110)
433 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
434 //if (address >= 0xF03B00 && address <= 0xF03DFF)
435 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
437 /*if (address == 0x0100)//64*4)
438 WriteLog("M68K: Wrote word to VI vector value %04X...\n", value);//*/
440 if (address >= 0x18FA70 && address < (0x18FA70 + 8000))
441 WriteLog("M68K: Word %04X written at %08X by 68K\n", value, address);//*/
443 if ((address >= 0x000000) && (address <= 0x3FFFFE))
445 /* jaguar_mainRam[address] = value >> 8;
446 jaguar_mainRam[address + 1] = value & 0xFF;*/
447 SET16(jaguar_mainRam, address, value);
449 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
450 CDROMWriteWord(address, value, M68K);
451 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
452 TOMWriteWord(address, value, M68K);
453 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
454 JERRYWriteWord(address, value, M68K);
457 jaguar_unknown_writeword(address, value, M68K);
458 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
459 WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
460 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
461 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
466 void m68k_write_memory_32(unsigned int address, unsigned int value)
468 //WriteLog("--> [WM32]\n");
469 /*if (address == 0x0100)//64*4)
470 WriteLog("M68K: Wrote dword to VI vector value %08X...\n", value);//*/
471 /*if (address >= 0xF03214 && address < 0xF0321F)
472 WriteLog("M68K: Writing DWORD (%08X) to GPU RAM (%08X)...\n", value, address);//*/
473 //M68K: Writing DWORD (88E30047) to GPU RAM (00F03214)...
474 /*extern bool doGPUDis;
475 if (address == 0xF03214 && value == 0x88E30047)
478 m68k_write_memory_16(address, value >> 16);
479 m68k_write_memory_16(address + 2, value & 0xFFFF);
483 uint32 jaguar_get_handler(uint32 i)
485 return JaguarReadLong(i * 4);
488 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
490 uint32 handler = jaguar_get_handler(i);
491 if (handler && (handler != 0xFFFFFFFF))
497 void M68K_show_context(void)
499 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
500 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
501 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
503 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
504 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
506 WriteLog("68K disasm\n");
507 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
508 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
509 // jaguar_dasm(0x5000, 0x14414);
511 // WriteLog("\n.......[Cart start]...........\n\n");
512 // jaguar_dasm(0x192000, 0x1000);//0x200);
514 WriteLog("..................\n");
516 if (tom_irq_enabled(IRQ_VBLANK))
518 WriteLog("vblank int: enabled\n");
519 jaguar_dasm(jaguar_get_handler(64), 0x200);
522 WriteLog("vblank int: disabled\n");
524 WriteLog("..................\n");
526 for(int i=0; i<256; i++)
527 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
531 // Unknown read/write byte/word routines
534 // It's hard to believe that developers would be sloppy with their memory writes, yet in
535 // some cases the developers screwed up royal. E.g., Club Drive has the following code:
537 // 807EC4: movea.l #$f1b000, A1
538 // 807ECA: movea.l #$8129e0, A0
539 // 807ED0: move.l A0, D0
540 // 807ED2: move.l #$f1bb94, D1
541 // 807ED8: sub.l D0, D1
542 // 807EDA: lsr.l #2, D1
543 // 807EDC: move.l (A0)+, (A1)+
544 // 807EDE: dbra D1, 807edc
546 // The problem is at $807ED0--instead of putting A0 into D0, they really meant to put A1
547 // in. This mistake causes it to try and overwrite approximately $700000 worth of address
548 // space! (That is, unless the 68K causes a bus error...)
550 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
552 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
553 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));
555 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
556 extern bool finished;
558 extern bool doDSPDis;
564 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
566 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
567 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));
569 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
570 extern bool finished;
572 extern bool doDSPDis;
578 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
580 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
581 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
583 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
584 extern bool finished;
586 extern bool doDSPDis;
593 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
595 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
596 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
598 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
599 extern bool finished;
601 extern bool doDSPDis;
609 // Disassemble M68K instructions at the given offset
612 unsigned int m68k_read_disassembler_8(unsigned int address)
614 return m68k_read_memory_8(address);
617 unsigned int m68k_read_disassembler_16(unsigned int address)
619 return m68k_read_memory_16(address);
622 unsigned int m68k_read_disassembler_32(unsigned int address)
624 return m68k_read_memory_32(address);
627 void jaguar_dasm(uint32 offset, uint32 qt)
630 static char buffer[2048];//, mem[64];
631 int pc = offset, oldpc;
633 for(uint32 i=0; i<qt; i++)
636 for(int j=0; j<64; j++)
637 mem[j^0x01] = jaguar_byte_read(pc + j);
639 pc += Dasm68000((char *)mem, buffer, 0);
640 WriteLog("%08X: %s\n", oldpc, buffer);//*/
642 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
643 WriteLog("%08X: %s\n", oldpc, buffer);//*/
648 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
653 if (offset < 0x400000)
654 data = jaguar_mainRam[offset & 0x3FFFFF];
655 else if ((offset >= 0x800000) && (offset < 0xC00000))
656 data = jaguar_mainRom[offset - 0x800000];
657 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
658 data = CDROMReadByte(offset, who);
659 else if ((offset >= 0xE00000) && (offset < 0xE40000))
660 data = jaguar_bootRom[offset & 0x3FFFF];
661 else if ((offset >= 0xF00000) && (offset < 0xF10000))
662 data = TOMReadByte(offset, who);
663 else if ((offset >= 0xF10000) && (offset < 0xF20000))
664 data = JERRYReadByte(offset, who);
666 data = jaguar_unknown_readbyte(offset, who);
671 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
674 if (offset <= 0x3FFFFE)
676 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
678 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
681 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
683 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
684 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
685 return CDROMReadWord(offset, who);
686 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
687 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
688 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
689 return TOMReadWord(offset, who);
690 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
691 return JERRYReadWord(offset, who);
693 return jaguar_unknown_readword(offset, who);
696 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
698 //Need to check for writes in the range of $18FA70 + 8000...
700 if (offset >= 0x18FA70 && offset < (0x18FA70 + 8000))
701 WriteLog("JWB: Byte %02X written at %08X by %s\n", data, offset, whoName[who]);//*/
704 if (offset < 0x400000)
706 jaguar_mainRam[offset & 0x3FFFFF] = data;
709 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
711 CDROMWriteByte(offset, data, who);
714 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
716 TOMWriteByte(offset, data, who);
719 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
721 JERRYWriteByte(offset, data, who);
725 jaguar_unknown_writebyte(offset, data, who);
729 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
731 /*if (offset == 0x0100)//64*4)
732 WriteLog("M68K: %s wrote word to VI vector value %04X...\n", whoName[who], data);
733 if (offset == 0x0102)//64*4)
734 WriteLog("M68K: %s wrote word to VI vector+2 value %04X...\n", whoName[who], data);//*/
735 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
736 // PLUS, you would handle this in the GPU/DSP WriteLong code! Not here!
737 //Need to check for writes in the range of $18FA70 + 8000...
739 if (offset >= 0x18FA70 && offset < (0x18FA70 + 8000))
740 WriteLog("JWW: Word %04X written at %08X by %s\n", data, offset, whoName[who]);//*/
744 if (offset <= 0x3FFFFE)
749 1A 69 F0 ($0000) -> Starfield
750 1A 73 C8 ($0001) -> Final clearing blit & bitmap blit?
753 1A 8F E8 ($0004) -> "Jaguar" small color logo?
762 //This MUST be done by the 68K!
763 /*if (offset == 0x670C)
764 WriteLog("Jaguar: %s writing to location $670C...\n", whoName[who]);*/
766 /*extern bool doGPUDis;
767 //if ((offset == 0x100000 + 75522) && who == GPU) // 76,226 -> 75522
768 if ((offset == 0x100000 + 128470) && who == GPU) // 107,167 -> 128470 (384 x 250 screen size 16BPP)
769 //if ((offset >= 0x100000 && offset <= 0x12C087) && who == GPU)
771 /*if (offset == 0x100000 + 128470) // 107,167 -> 128470 (384 x 250 screen size 16BPP)
772 WriteLog("JWW: Writing value %04X at %08X by %s...\n", data, offset, whoName[who]);
773 if ((data & 0xFF00) != 0x7700)
774 WriteLog("JWW: Writing value %04X at %08X by %s...\n", data, offset, whoName[who]);//*/
775 /*if ((offset >= 0x100000 && offset <= 0x147FFF) && who == GPU)
777 /*if ((data & 0xFF00) != 0x7700 && who == GPU)
778 WriteLog("JWW: Writing value %04X at %08X by %s...\n", data, offset, whoName[who]);//*/
779 /*if ((offset >= 0x100000 + 0x48000 && offset <= 0x12C087 + 0x48000) && who == GPU)
781 /*extern bool doGPUDis;
782 if (offset == 0x120216 && who == GPU)
784 /*extern uint32 gpu_pc;
785 if (who == GPU && (gpu_pc == 0xF03604 || gpu_pc == 0xF03638))
787 uint32 base = offset - (offset > 0x148000 ? 0x148000 : 0x100000);
788 uint32 y = base / 0x300;
789 uint32 x = (base - (y * 0x300)) / 2;
790 WriteLog("JWW: Writing starfield star %04X at %08X (%u/%u) [%s]\n", data, offset, x, y, (gpu_pc == 0xF03604 ? "s" : "L"));
793 JWW: Writing starfield star 775E at 0011F650 (555984/1447)
795 //if (offset == (0x001E17F8 + 0x34))
796 /*if (who == GPU && offset == (0x001E17F8 + 0x34))
798 // WriteLog("JWW: Write at %08X written to by %s.\n", 0x001E17F8 + 0x34, whoName[who]);//*/
799 /*extern uint32 gpu_pc;
800 if (who == GPU && (gpu_pc == 0xF03604 || gpu_pc == 0xF03638))
802 extern int objectPtr;
803 // if (offset > 0x148000)
806 if (starCount > objectPtr)
809 // if (starCount == 1)
810 // WriteLog("--> Drawing 1st star...\n");
812 // uint32 base = offset - (offset > 0x148000 ? 0x148000 : 0x100000);
813 // uint32 y = base / 0x300;
814 // uint32 x = (base - (y * 0x300)) / 2;
815 // WriteLog("JWW: Writing starfield star %04X at %08X (%u/%u) [%s]\n", data, offset, x, y, (gpu_pc == 0xF03604 ? "s" : "L"));
817 //A star of interest...
818 //-->JWW: Writing starfield star 77C9 at 0011D31A (269/155) [s]
819 //1st trail +3(x), -1(y) -> 272, 154 -> 0011D020
820 //JWW: Blitter writing echo 77B3 at 0011D022...
822 //extern bool doGPUDis;
823 /*if (offset == 0x11D022 + 0x48000 || offset == 0x11D022)// && who == GPU)
826 WriteLog("JWW: %s writing echo %04X at %08X...\n", whoName[who], data, offset);
829 if (offset == 0x11D31A + 0x48000 || offset == 0x11D31A)
830 WriteLog("JWW: %s writing star %04X at %08X...\n", whoName[who], data, offset);//*/
832 jaguar_mainRam[(offset+0) & 0x3FFFFF] = data >> 8;
833 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
836 else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
838 CDROMWriteWord(offset, data, who);
841 else if (offset >= 0xF00000 && offset <= 0xF0FFFE)
843 TOMWriteWord(offset, data, who);
846 else if (offset >= 0xF10000 && offset <= 0xF1FFFE)
848 JERRYWriteWord(offset, data, who);
851 // Don't bomb on attempts to write to ROM
852 else if (offset >= 0x800000 && offset <= 0xEFFFFF)
855 jaguar_unknown_writeword(offset, data, who);
858 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
859 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
861 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
864 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
865 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
867 /* extern bool doDSPDis;
868 if (offset < 0x400 && !doDSPDis)
870 WriteLog("JLW: Write to %08X by %s... Starting DSP log!\n\n", offset, whoName[who]);
873 /*if (offset == 0x0100)//64*4)
874 WriteLog("M68K: %s wrote dword to VI vector value %08X...\n", whoName[who], data);//*/
876 JaguarWriteWord(offset, data >> 16, who);
877 JaguarWriteWord(offset+2, data & 0xFFFF, who);
881 // Jaguar console initialization
883 void jaguar_init(void)
885 #ifdef CPU_DEBUG_MEMORY
886 memset(readMem, 0x00, 0x400000);
887 memset(writeMemMin, 0xFF, 0x400000);
888 memset(writeMemMax, 0x00, 0x400000);
890 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
891 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
892 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM"); // Only uses half of this!
893 memory_malloc_secure((void **)&jaguar_CDBootROM, 0x040000, "Jaguar 68K CPU CD BIOS ROM");
894 memset(jaguar_mainRam, 0x00, 0x400000);
895 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
896 // memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
897 //NOTE: This *doesn't* fix FlipOut...
899 //Seems to want $01010101... Dunno why. Investigate!
900 memset(jaguar_mainRom, 0x01, 0x600000); // & set it to all 01s...
901 // memset(jaguar_mainRom, 0xFF, 0x600000); // & set it to all Fs...
903 WriteLog("Jaguar: m68k_set_cpu_type...");
904 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
905 WriteLog("OK\nJaguar: gpu_init...");
907 WriteLog("OK\nJaguar: DSPInit...");
909 WriteLog("OK\nJaguar: tom_init...");
911 WriteLog("OK\nJaguar: jerry_init...");
913 WriteLog("OK\nJaguar: cdrom_init...");
918 void jaguar_done(void)
920 #ifdef CPU_DEBUG_MEMORY
921 /* WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
922 jaguar_dasm(0x8D0D44, 5000);
924 /* WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
925 jaguar_dasm(0x806300, 5000);
928 /* WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
930 for(uint32 i=0; i<=raPtr; i++)
932 WriteLog("\t%08X\n", returnAddr[i]);
933 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
934 jaguar_dasm(returnAddr[i] - 16, 16);
939 /* int start = 0, end = 0;
940 bool endTriggered = false, startTriggered = false;
941 for(int i=0; i<0x400000; i++)
943 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
946 startTriggered = true, endTriggered = false, start = i;
948 WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
954 end = i - 1, endTriggered = true, startTriggered = false;
955 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
962 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
963 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
964 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
965 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
966 for(int i=-2; i<9; i++)
967 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
969 /* WriteLog("\nM68000 disassembly at $802288...\n");
970 jaguar_dasm(0x802288, 3);
971 WriteLog("\nM68000 disassembly at $802200...\n");
972 jaguar_dasm(0x802200, 500);
973 WriteLog("\nM68000 disassembly at $802518...\n");
974 jaguar_dasm(0x802518, 100);//*/
976 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
977 jaguar_dasm(0x803F00, 500);
980 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
981 jaguar_dasm(0x802B00, 500);
984 /* WriteLog("\n\nM68000 disassembly at $809900 (look @ $8099F8)...\n");
985 jaguar_dasm(0x809900, 500);
988 /* WriteLog("\n\nDump of $8093C8:\n\n");
989 for(int i=0x8093C8; i<0x809900; i+=4)
990 WriteLog("%06X: %08X\n", i, JaguarReadLong(i));//*/
991 /* WriteLog("\n\nM68000 disassembly at $90006C...\n");
992 jaguar_dasm(0x90006C, 500);
995 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
996 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
997 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
1008 memory_free(jaguar_mainRom);
1009 memory_free(jaguar_mainRam);
1010 memory_free(jaguar_bootRom);
1011 memory_free(jaguar_CDBootROM);
1014 void jaguar_reset(void)
1016 if (vjs.useJaguarBIOS)
1017 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
1020 // Should also make a run address global as well, for when we reset the jag (PD mainly)
1021 /* SET32(jaguar_mainRam, 4, 0x00802000);
1022 // Handle PD stuff...
1023 // This should definitely go elsewhere (like in the cart load section)!
1024 //NOTE: The bytes 'JAGR' should also be at position $1C...
1025 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
1027 uint32 loadAddress = GET32(jaguar_mainRom, 0x22), runAddress = GET32(jaguar_mainRom, 0x2A);
1028 //This is not always right! Especially when converted via bin2jag1!!!
1029 //We should have access to the length of the furshlumiger file that was loaded anyway!
1031 // uint32 progLength = GET32(jaguar_mainRom, 0x02);
1034 // WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
1035 // memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, progLength);
1036 WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, jaguarRomSize - 0x2E);
1037 memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, jaguarRomSize - 0x2E);
1038 SET32(jaguar_mainRam, 4, runAddress);
1040 SET32(jaguar_mainRam, 4, jaguarRunAddress);
1043 // WriteLog("jaguar_reset():\n");
1044 //#ifdef SOUND_OUTPUT
1045 // ws_audio_reset();
1053 m68k_pulse_reset(); // Reset the 68000
1054 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
1058 // Main Jaguar execution loop (1 frame)
1060 void JaguarExecute(int16 * backbuffer, bool render)
1062 uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
1063 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
1064 // uint16 vdb = TOMReadWord(0xF00046);
1065 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
1066 // uint16 vbb = TOMReadWord(0xF00040);
1067 //It seems that they mean it when they say that VDE is the end of object processing.
1068 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
1069 //buffer and not to write any more pixels... !!! FIX !!!
1070 // uint16 vde = TOMReadWord(0xF00048);
1072 uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
1073 // Should these be hardwired or read from VP? Yes, from VP!
1074 uint32 M68KCyclesPerScanline
1075 = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
1076 uint32 RISCCyclesPerScanline
1077 = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
1079 TOMResetBackbuffer(backbuffer);
1080 /*extern int effect_start;
1083 WriteLog("JagExe: VP=%u, VI=%u, CPU CPS=%u, GPU CPS=%u\n", vp, vi, M68KCyclesPerScanline, RISCCyclesPerScanline);
1086 //extern int start_logging;
1087 for(uint16 i=0; i<vp; i++)
1089 // Increment the horizontal count (why? RNG?)
1090 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
1092 TOMWriteWord(0xF00006, i); // Write the VC
1094 // if (i == vi) // Time for Vertical Interrupt?
1095 //Not sure if this is correct...
1096 //Seems to be, kinda. According to the JTRM, this should only fire on odd lines in non-interlace mode...
1097 //Which means that it normally wouldn't go when it's zero.
1098 if (i == vi && i > 0) // Time for Vertical Interrupt?
1100 if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
1102 // We don't have to worry about autovectors & whatnot because the Jaguar
1103 // tells you through its HW registers who sent the interrupt...
1104 tom_set_pending_video_int();
1109 // uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
1110 // if (invalid_instruction_address != 0x80000000)
1111 // cd_bios_process(invalid_instruction_address);
1112 //if (start_logging)
1113 // WriteLog("About to execute M68K (%u)...\n", i);
1114 m68k_execute(M68KCyclesPerScanline);
1115 // No CD handling... !!! FIX !!!
1116 //This isn't the right to go about it anyway.
1117 //if (start_logging)
1118 // WriteLog("About to execute CD BIOS (%u)...\n", i);
1119 // cd_bios_exec(i); // NOTE: Ignores parameter...
1120 //if (start_logging)
1121 // WriteLog("About to execute TOM's PIT (%u)...\n", i);
1122 TOMExecPIT(RISCCyclesPerScanline);
1123 //if (start_logging)
1124 // WriteLog("About to execute JERRY's PIT (%u)...\n", i);
1125 JERRYExecPIT(RISCCyclesPerScanline);
1126 //if (start_logging)
1127 // WriteLog("About to execute JERRY's SSI (%u)...\n", i);
1128 jerry_i2s_exec(RISCCyclesPerScanline);
1129 //if (start_logging)
1130 // WriteLog("About to execute GPU (%u)...\n", i);
1131 gpu_exec(RISCCyclesPerScanline);
1134 if (vjs.usePipelinedDSP)
1135 DSPExecP2(RISCCyclesPerScanline); // Pipelined DSP execution (3 stage)...
1137 DSPExec(RISCCyclesPerScanline); // Ordinary non-pipelined DSP
1138 // DSPExecComp(RISCCyclesPerScanline); // Comparison core
1140 //if (start_logging)
1141 // WriteLog("About to execute OP (%u)...\n", i);
1142 TOMExecScanline(i, render);
1146 // Temp debugging stuff
1148 void DumpMainMemory(void)
1150 FILE * fp = fopen("./memdump.bin", "wb");
1155 fwrite(jaguar_mainRam, 1, 0x400000, fp);
1159 uint8 * GetRamPtr(void)
1161 return jaguar_mainRam;