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_bootRom = NULL;
52 /*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;
60 uint32 pcQueue[0x400];
64 // Callback function to detect illegal instructions
66 //void GPUDumpDisassembly(void);
67 //void GPUDumpRegisters(void);
68 void M68KInstructionHook(void)
70 uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
73 // Ideally, we'd save all the registers as well...
74 pcQueue[pcQPtr++] = m68kPC;
77 if (m68kPC & 0x01) // Oops! We're fetching an odd address!
79 WriteLog("M68K: Attempted to execute from an odd adress!\n\nBacktrace:\n\n");
81 static char buffer[2048];
82 for(int i=0; i<0x400; i++)
84 m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], M68K_CPU_TYPE_68000);
85 WriteLog("\t%08X: %s\n", pcQueue[(pcQPtr + i) & 0x3FF], buffer);
89 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
90 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
91 for(int i=0; i<10; i++)
92 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
93 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
99 /* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
101 static char buffer[2048];
102 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
103 WriteLog("%08X: %s", m68kPC, buffer);
104 WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
105 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
106 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
108 /* if (m68kPC == 0x8D0E48 && effect_start5)
110 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
112 GPUDumpDisassembly();
116 /* uint16 opcode = JaguarReadWord(m68kPC);
117 if (opcode == 0x4E75) // RTS
120 // WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
122 uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
124 if (raPtr != 0xFFFFFFFF)
126 for(uint32 i=0; i<=raPtr; i++)
128 if (returnAddr[i] == addr)
137 returnAddr[++raPtr] = addr;
141 /* static char buffer[2048];
142 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
143 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));//*/
145 /* if (m68kPC == 0x803F16)
147 WriteLog("M68K: Registers found at $803F16:\n");
148 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
149 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
150 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
152 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
153 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
156 #ifdef ABORT_ON_ILLEGAL_INSTRUCTIONS
157 if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
159 #ifndef ABORT_ON_OFFICIAL_ILLEGAL_INSTRUCTION
160 if (m68k_read_memory_16(m68kPC) == 0x4AFC)
162 // This is a kludge to let homebrew programs work properly (i.e., let the other processors
163 // keep going even when the 68K dumped back to the debugger or what have you).
165 // m68k_set_reg(M68K_REG_PC, m68kPC - 2);
166 // Try setting the vector to the illegal instruction...
167 //This doesn't work right either! Do something else! Quick!
168 // SET32(jaguar_mainRam, 0x10, m68kPC);
174 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
175 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
176 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
177 for(int i=0; i<10; i++)
178 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
179 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
183 // WriteLog("\n\n68K disasm\n\n");
184 // jaguar_dasm(0x802000, 0x50C);
195 // Musashi 68000 read/write/IRQ functions
198 int irq_ack_handler(int level)
200 int vector = M68K_INT_ACK_AUTOVECTOR;
202 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
206 m68k_set_irq(0); // Clear the IRQ...
207 vector = 64; // Set user interrupt #0
213 unsigned int m68k_read_memory_8(unsigned int address)
215 #ifdef CPU_DEBUG_MEMORY
216 if ((address >= 0x000000) && (address <= 0x3FFFFF))
219 readMem[address] = 1;
222 //WriteLog("[RM8] Addr: %08X\n", address);
223 unsigned int retVal = 0;
225 if ((address >= 0x000000) && (address <= 0x3FFFFF))
226 retVal = jaguar_mainRam[address];
227 else if ((address >= 0x800000) && (address <= 0xDFFFFF))
228 retVal = jaguar_mainRom[address - 0x800000];
229 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
230 retVal = jaguar_bootRom[address - 0xE00000];
231 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
232 retVal = CDROMReadByte(address);
233 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
234 retVal = TOMReadByte(address, M68K);
235 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
236 retVal = JERRYReadByte(address, M68K);
238 retVal = jaguar_unknown_readbyte(address, M68K);
243 void gpu_dump_disassembly(void);
244 void gpu_dump_registers(void);
246 unsigned int m68k_read_memory_16(unsigned int address)
248 #ifdef CPU_DEBUG_MEMORY
249 /* if ((address >= 0x000000) && (address <= 0x3FFFFE))
252 readMem[address] = 1, readMem[address + 1] = 1;
254 /* if (effect_start && (address >= 0x8064FC && address <= 0x806501))
256 return 0x4E71; // NOP
258 if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
260 return 0x4E71; // NOP
262 if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
264 return 0x4E71; // NOP
266 if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
268 return 0x4E71; // NOP
270 if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
272 return 0x4E71; // NOP
274 if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
276 return 0x4E71; // NOP
279 //WriteLog("[RM16] Addr: %08X\n", address);
280 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
281 // for(int i=0; i<10000; i++)
282 WriteLog("[M68K] In routine #6!\n");//*/
283 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
284 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
285 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
287 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
288 gpu_dump_registers();
289 gpu_dump_disassembly();
290 // for(int i=0; i<10000; i++)
291 // WriteLog("[M68K] About to run GPU!\n");
293 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
294 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
296 if (address == 0x000066A0)
298 gpu_dump_registers();
299 gpu_dump_disassembly();
301 for(int i=0; i<10000; i++)
302 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
304 unsigned int retVal = 0;
306 if ((address >= 0x000000) && (address <= 0x3FFFFE))
307 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
308 else if ((address >= 0x800000) && (address <= 0xDFFFFE))
309 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
310 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
311 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
312 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
313 retVal = CDROMReadWord(address, M68K);
314 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
315 retVal = TOMReadWord(address, M68K);
316 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
317 retVal = JERRYReadWord(address, M68K);
319 retVal = jaguar_unknown_readword(address, M68K);
324 unsigned int m68k_read_memory_32(unsigned int address)
326 //WriteLog("--> [RM32]\n");
327 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
330 void m68k_write_memory_8(unsigned int address, unsigned int value)
332 #ifdef CPU_DEBUG_MEMORY
333 if ((address >= 0x000000) && (address <= 0x3FFFFF))
337 if (value > writeMemMax[address])
338 writeMemMax[address] = value;
339 if (value < writeMemMin[address])
340 writeMemMin[address] = value;
344 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
345 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
346 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
347 if ((address >= 0x000000) && (address <= 0x3FFFFF))
348 jaguar_mainRam[address] = value;
349 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
350 CDROMWriteByte(address, value, M68K);
351 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
352 TOMWriteByte(address, value, M68K);
353 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
354 JERRYWriteByte(address, value, M68K);
356 jaguar_unknown_writebyte(address, value, M68K);
359 void m68k_write_memory_16(unsigned int address, unsigned int value)
361 #ifdef CPU_DEBUG_MEMORY
362 if ((address >= 0x000000) && (address <= 0x3FFFFE))
366 uint8 hi = value >> 8, lo = value & 0xFF;
368 if (hi > writeMemMax[address])
369 writeMemMax[address] = hi;
370 if (hi < writeMemMin[address])
371 writeMemMin[address] = hi;
373 if (lo > writeMemMax[address+1])
374 writeMemMax[address+1] = lo;
375 if (lo < writeMemMin[address+1])
376 writeMemMin[address+1] = lo;
380 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
381 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
382 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
383 //if (address >= 0xF02200 && address <= 0xF0229F)
384 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
385 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
386 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
387 /*extern uint32 totalFrames;
388 if (address == 0xF02114)
389 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
390 if (address == 0xF02110)
391 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
392 //if (address >= 0xF03B00 && address <= 0xF03DFF)
393 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
395 if ((address >= 0x000000) && (address <= 0x3FFFFE))
397 /* jaguar_mainRam[address] = value >> 8;
398 jaguar_mainRam[address + 1] = value & 0xFF;*/
399 SET16(jaguar_mainRam, address, value);
401 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
402 CDROMWriteWord(address, value, M68K);
403 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
404 TOMWriteWord(address, value, M68K);
405 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
406 JERRYWriteWord(address, value, M68K);
409 jaguar_unknown_writeword(address, value, M68K);
410 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
411 WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
412 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
413 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
418 void m68k_write_memory_32(unsigned int address, unsigned int value)
420 //WriteLog("--> [WM32]\n");
421 m68k_write_memory_16(address, value >> 16);
422 m68k_write_memory_16(address + 2, value & 0xFFFF);
426 uint32 jaguar_get_handler(uint32 i)
428 return JaguarReadLong(i * 4);
431 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
433 uint32 handler = jaguar_get_handler(i);
434 if (handler && (handler != 0xFFFFFFFF))
440 void M68K_show_context(void)
442 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
443 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
444 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
446 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
447 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
449 WriteLog("68K disasm\n");
450 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
451 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
452 // jaguar_dasm(0x5000, 0x14414);
454 WriteLog("..................\n");
456 if (tom_irq_enabled(IRQ_VBLANK))
458 WriteLog("vblank int: enabled\n");
459 jaguar_dasm(jaguar_get_handler(64), 0x200);
462 WriteLog("vblank int: disabled\n");
464 WriteLog("..................\n");
466 for(int i=0; i<256; i++)
467 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
471 // Unknown read/write byte/word routines
474 // It's hard to believe that developers would be sloppy with their memory writes, yet in
475 // some cases the developers screwed up royal. E.g., Club Drive has the following code:
477 // 807EC4: movea.l #$f1b000, A1
478 // 807ECA: movea.l #$8129e0, A0
479 // 807ED0: move.l A0, D0
480 // 807ED2: move.l #$f1bb94, D1
481 // 807ED8: sub.l D0, D1
482 // 807EDA: lsr.l #2, D1
483 // 807EDC: move.l (A0)+, (A1)+
484 // 807EDE: dbra D1, 807edc
486 // The problem is at $807ED0--instead of putting A0 into D0, they really meant to put A1
487 // in. This mistake causes it to try and overwrite approximately $700000 worth of address
488 // space! (That is, unless the 68K causes a bus error...)
490 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
492 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
493 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));
495 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
496 extern bool finished;
498 extern bool doDSPDis;
504 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
506 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
507 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));
509 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
510 extern bool finished;
512 extern bool doDSPDis;
518 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
520 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
521 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
523 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
524 extern bool finished;
526 extern bool doDSPDis;
533 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
535 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
536 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
538 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
539 extern bool finished;
541 extern bool doDSPDis;
549 // Disassemble M68K instructions at the given offset
552 unsigned int m68k_read_disassembler_8(unsigned int address)
554 return m68k_read_memory_8(address);
557 unsigned int m68k_read_disassembler_16(unsigned int address)
559 return m68k_read_memory_16(address);
562 unsigned int m68k_read_disassembler_32(unsigned int address)
564 return m68k_read_memory_32(address);
567 void jaguar_dasm(uint32 offset, uint32 qt)
570 static char buffer[2048];//, mem[64];
571 int pc = offset, oldpc;
573 for(uint32 i=0; i<qt; i++)
576 for(int j=0; j<64; j++)
577 mem[j^0x01] = jaguar_byte_read(pc + j);
579 pc += Dasm68000((char *)mem, buffer, 0);
580 WriteLog("%08X: %s\n", oldpc, buffer);//*/
582 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
583 WriteLog("%08X: %s\n", oldpc, buffer);//*/
588 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
593 if (offset < 0x400000)
594 data = jaguar_mainRam[offset & 0x3FFFFF];
595 else if ((offset >= 0x800000) && (offset < 0xC00000))
596 data = jaguar_mainRom[offset - 0x800000];
597 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
598 data = CDROMReadByte(offset, who);
599 else if ((offset >= 0xE00000) && (offset < 0xE40000))
600 data = jaguar_bootRom[offset & 0x3FFFF];
601 else if ((offset >= 0xF00000) && (offset < 0xF10000))
602 data = TOMReadByte(offset, who);
603 else if ((offset >= 0xF10000) && (offset < 0xF20000))
604 data = JERRYReadByte(offset, who);
606 data = jaguar_unknown_readbyte(offset, who);
611 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
614 if (offset <= 0x3FFFFE)
616 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
618 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
621 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
623 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
624 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
625 return CDROMReadWord(offset, who);
626 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
627 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
628 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
629 return TOMReadWord(offset, who);
630 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
631 return JERRYReadWord(offset, who);
633 return jaguar_unknown_readword(offset, who);
636 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
639 if (offset < 0x400000)
641 jaguar_mainRam[offset & 0x3FFFFF] = data;
644 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
646 CDROMWriteByte(offset, data, who);
649 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
651 TOMWriteByte(offset, data, who);
654 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
656 JERRYWriteByte(offset, data, who);
660 jaguar_unknown_writebyte(offset, data, who);
663 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
665 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
666 // PLUS, you would handle this in the GPU/DSP WriteLong code! Not here!
669 if (offset <= 0x3FFFFE)
671 //This MUST be done by the 68K!
672 /*if (offset == 0x670C)
673 WriteLog("Jaguar: %s writing to location $670C...\n", whoName[who]);*/
675 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
676 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
679 else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
681 CDROMWriteWord(offset, data, who);
684 else if (offset >= 0xF00000 && offset <= 0xF0FFFE)
686 TOMWriteWord(offset, data, who);
689 else if (offset >= 0xF10000 && offset <= 0xF1FFFE)
691 JERRYWriteWord(offset, data, who);
694 // Don't bomb on attempts to write to ROM
695 else if (offset >= 0x800000 && offset <= 0xEFFFFF)
698 jaguar_unknown_writeword(offset, data, who);
701 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
702 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
704 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
707 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
708 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
710 /* extern bool doDSPDis;
711 if (offset < 0x400 && !doDSPDis)
713 WriteLog("JLW: Write to %08X by %s... Starting DSP log!\n\n", offset, whoName[who]);
717 JaguarWriteWord(offset, data >> 16, who);
718 JaguarWriteWord(offset+2, data & 0xFFFF, who);
722 // Jaguar console initialization
724 void jaguar_init(void)
726 #ifdef CPU_DEBUG_MEMORY
727 memset(readMem, 0x00, 0x400000);
728 memset(writeMemMin, 0xFF, 0x400000);
729 memset(writeMemMax, 0x00, 0x400000);
731 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
732 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
733 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
734 memset(jaguar_mainRam, 0x00, 0x400000);
735 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
736 // memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
737 //NOTE: This *doesn't* fix FlipOut...
738 memset(jaguar_mainRom, 0x01, 0x600000); // & set it to all 01s...
740 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
741 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
742 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
743 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
744 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
745 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
747 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
755 void jaguar_done(void)
757 #ifdef CPU_DEBUG_MEMORY
758 /* WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
759 jaguar_dasm(0x8D0D44, 5000);
761 /* WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
762 jaguar_dasm(0x806300, 5000);
765 /* WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
767 for(uint32 i=0; i<=raPtr; i++)
769 WriteLog("\t%08X\n", returnAddr[i]);
770 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
771 jaguar_dasm(returnAddr[i] - 16, 16);
776 /* int start = 0, end = 0;
777 bool endTriggered = false, startTriggered = false;
778 for(int i=0; i<0x400000; i++)
780 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
783 startTriggered = true, endTriggered = false, start = i;
785 WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
791 end = i - 1, endTriggered = true, startTriggered = false;
792 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
799 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
800 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
801 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
802 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
803 for(int i=-2; i<9; i++)
804 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
806 /* WriteLog("\nM68000 disassembly at $802288...\n");
807 jaguar_dasm(0x802288, 3);
808 WriteLog("\nM68000 disassembly at $802200...\n");
809 jaguar_dasm(0x802200, 500);
810 WriteLog("\nM68000 disassembly at $802518...\n");
811 jaguar_dasm(0x802518, 100);//*/
813 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
814 jaguar_dasm(0x803F00, 500);
817 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
818 jaguar_dasm(0x802B00, 500);
821 /* WriteLog("\n\nM68000 disassembly at $809900 (look @ $8099F8)...\n");
822 jaguar_dasm(0x809900, 500);
825 /* WriteLog("\n\nDump of $8093C8:\n\n");
826 for(int i=0x8093C8; i<0x809900; i+=4)
827 WriteLog("%06X: %08X\n", i, JaguarReadLong(i));//*/
828 /* WriteLog("\n\nM68000 disassembly at $90006C...\n");
829 jaguar_dasm(0x90006C, 500);
832 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
833 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
834 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
845 memory_free(jaguar_mainRom);
846 memory_free(jaguar_bootRom);
847 memory_free(jaguar_mainRam);
850 void jaguar_reset(void)
852 if (vjs.useJaguarBIOS)
853 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
856 // Should also make a run address global as well, for when we reset the jag (PD mainly)
857 /* SET32(jaguar_mainRam, 4, 0x00802000);
858 // Handle PD stuff...
859 // This should definitely go elsewhere (like in the cart load section)!
860 //NOTE: The bytes 'JAGR' should also be at position $1C...
861 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
863 uint32 loadAddress = GET32(jaguar_mainRom, 0x22), runAddress = GET32(jaguar_mainRom, 0x2A);
864 //This is not always right! Especially when converted via bin2jag1!!!
865 //We should have access to the length of the furshlumiger file that was loaded anyway!
867 // uint32 progLength = GET32(jaguar_mainRom, 0x02);
870 // WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
871 // memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, progLength);
872 WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, jaguarRomSize - 0x2E);
873 memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, jaguarRomSize - 0x2E);
874 SET32(jaguar_mainRam, 4, runAddress);
876 SET32(jaguar_mainRam, 4, jaguarRunAddress);
879 // WriteLog("jaguar_reset():\n");
880 //#ifdef SOUND_OUTPUT
889 m68k_pulse_reset(); // Reset the 68000
890 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
894 // Main Jaguar execution loop (1 frame)
896 void JaguarExecute(int16 * backbuffer, bool render)
898 uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
899 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
900 // uint16 vdb = TOMReadWord(0xF00046);
901 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
902 // uint16 vbb = TOMReadWord(0xF00040);
903 //It seems that they mean it when they say that VDE is the end of object processing.
904 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
905 //buffer and not to write any more pixels... !!! FIX !!!
906 // uint16 vde = TOMReadWord(0xF00048);
908 uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
909 // Should these be hardwired or read from VP? Yes, from VP!
910 uint32 M68KCyclesPerScanline
911 = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
912 uint32 RISCCyclesPerScanline
913 = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
915 TOMResetBackbuffer(backbuffer);
916 /*extern int effect_start;
919 WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
922 //extern int start_logging;
923 for(uint16 i=0; i<vp; i++)
925 // Increment the horizontal count (why? RNG?)
926 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
928 TOMWriteWord(0xF00006, i); // Write the VC
930 // if (i == vi) // Time for Vertical Interrupt?
931 //Not sure if this is correct...
932 //Seems to be, kinda. According to the JTRM, this should only fire on odd lines in non-interlace mode...
933 //Which means that it normally wouldn't go when it's zero.
934 if (i == vi && i > 0) // Time for Vertical Interrupt?
936 if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
938 // We don't have to worry about autovectors & whatnot because the Jaguar
939 // tells you through its HW registers who sent the interrupt...
940 tom_set_pending_video_int();
945 // uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
946 // if (invalid_instruction_address != 0x80000000)
947 // cd_bios_process(invalid_instruction_address);
949 // WriteLog("About to execute M68K (%u)...\n", i);
950 m68k_execute(M68KCyclesPerScanline);
951 // No CD handling... !!! FIX !!!
953 // WriteLog("About to execute CD BIOS (%u)...\n", i);
954 cd_bios_exec(i); // NOTE: Ignores parameter...
956 // WriteLog("About to execute TOM's PIT (%u)...\n", i);
957 TOMExecPIT(RISCCyclesPerScanline);
959 // WriteLog("About to execute JERRY's PIT (%u)...\n", i);
960 jerry_pit_exec(RISCCyclesPerScanline);
962 // WriteLog("About to execute JERRY's SSI (%u)...\n", i);
963 jerry_i2s_exec(RISCCyclesPerScanline);
965 // WriteLog("About to execute GPU (%u)...\n", i);
966 gpu_exec(RISCCyclesPerScanline);
969 if (vjs.usePipelinedDSP)
970 DSPExecP2(RISCCyclesPerScanline); // Pipelined DSP execution (3 stage)...
972 DSPExec(RISCCyclesPerScanline); // Ordinary non-pipelined DSP
973 // DSPExecComp(RISCCyclesPerScanline); // Comparison core
976 // WriteLog("About to execute OP (%u)...\n", i);
977 TOMExecScanline(i, render);
981 // Temp debugging stuff
983 void DumpMainMemory(void)
985 FILE * fp = fopen("./memdump.bin", "wb");
990 fwrite(jaguar_mainRam, 1, 0x400000, fp);
994 uint8 * GetRamPtr(void)
996 return jaguar_mainRam;