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. :-)
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 CPU_DEBUG_MEMORY
21 // Private function prototypes
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);
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;
38 // Memory debugging identifiers
41 { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
43 uint32 jaguar_active_memory_dumps = 0;
45 uint32 jaguar_mainRom_crc32;
47 /*static*/ uint8 * jaguar_mainRam = NULL;
48 /*static*/ uint8 * jaguar_bootRom = NULL;
49 /*static*/ uint8 * jaguar_mainRom = NULL;
51 #ifdef CPU_DEBUG_MEMORY
52 uint8 writeMemMax[0x400000], writeMemMin[0x400000];
53 uint8 readMem[0x400000];
54 uint32 returnAddr[4000], raPtr = 0xFFFFFFFF;
57 uint32 pcQueue[0x400];
61 // Callback function to detect illegal instructions
63 //void GPUDumpDisassembly(void);
64 //void GPUDumpRegisters(void);
65 void M68KInstructionHook(void)
67 uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
70 // Ideally, we'd save all the registers as well...
71 pcQueue[pcQPtr++] = m68kPC;
74 if (m68kPC & 0x01) // Oops! We're fetching an odd address!
76 WriteLog("M68K: Attempted to execute from an odd adress!\n\nBacktrace:\n\n");
78 static char buffer[2048];
79 for(int i=0; i<0x400; i++)
81 m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], M68K_CPU_TYPE_68000);
82 WriteLog("\t%08X: %s\n", pcQueue[(pcQPtr + i) & 0x3FF], buffer);
86 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
87 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
88 for(int i=0; i<10; i++)
89 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
90 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
96 /* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
98 static char buffer[2048];
99 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
100 WriteLog("%08X: %s", m68kPC, buffer);
101 WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
102 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
103 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
105 /* if (m68kPC == 0x8D0E48 && effect_start5)
107 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
109 GPUDumpDisassembly();
113 /* uint16 opcode = JaguarReadWord(m68kPC);
114 if (opcode == 0x4E75) // RTS
117 // WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
119 uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
121 if (raPtr != 0xFFFFFFFF)
123 for(uint32 i=0; i<=raPtr; i++)
125 if (returnAddr[i] == addr)
134 returnAddr[++raPtr] = addr;
138 /* static char buffer[2048];
139 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
140 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));//*/
142 /* if (m68kPC == 0x803F16)
144 WriteLog("M68K: Registers found at $803F16:\n");
145 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
146 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
147 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
149 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
150 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
153 if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
155 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
156 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
157 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
158 for(int i=0; i<10; i++)
159 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
160 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
168 // Musashi 68000 read/write/IRQ functions
171 int irq_ack_handler(int level)
173 int vector = M68K_INT_ACK_AUTOVECTOR;
175 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
179 m68k_set_irq(0); // Clear the IRQ...
180 vector = 64; // Set user interrupt #0
186 unsigned int m68k_read_memory_8(unsigned int address)
188 #ifdef CPU_DEBUG_MEMORY
189 if ((address >= 0x000000) && (address <= 0x3FFFFF))
192 readMem[address] = 1;
195 //WriteLog("[RM8] Addr: %08X\n", address);
196 unsigned int retVal = 0;
198 if ((address >= 0x000000) && (address <= 0x3FFFFF))
199 retVal = jaguar_mainRam[address];
200 else if ((address >= 0x800000) && (address <= 0xDFFFFF))
201 retVal = jaguar_mainRom[address - 0x800000];
202 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
203 retVal = jaguar_bootRom[address - 0xE00000];
204 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
205 retVal = CDROMReadByte(address);
206 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
207 retVal = TOMReadByte(address, M68K);
208 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
209 retVal = JERRYReadByte(address, M68K);
211 retVal = jaguar_unknown_readbyte(address, M68K);
216 void gpu_dump_disassembly(void);
217 void gpu_dump_registers(void);
219 unsigned int m68k_read_memory_16(unsigned int address)
221 #ifdef CPU_DEBUG_MEMORY
222 /* if ((address >= 0x000000) && (address <= 0x3FFFFE))
225 readMem[address] = 1, readMem[address + 1] = 1;
227 /* if (effect_start && (address >= 0x8064FC && address <= 0x806501))
229 return 0x4E71; // NOP
231 if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
233 return 0x4E71; // NOP
235 if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
237 return 0x4E71; // NOP
239 if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
241 return 0x4E71; // NOP
243 if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
245 return 0x4E71; // NOP
247 if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
249 return 0x4E71; // NOP
252 //WriteLog("[RM16] Addr: %08X\n", address);
253 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
254 // for(int i=0; i<10000; i++)
255 WriteLog("[M68K] In routine #6!\n");//*/
256 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
257 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
258 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
260 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
261 gpu_dump_registers();
262 gpu_dump_disassembly();
263 // for(int i=0; i<10000; i++)
264 // WriteLog("[M68K] About to run GPU!\n");
266 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
267 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
269 if (address == 0x000066A0)
271 gpu_dump_registers();
272 gpu_dump_disassembly();
274 for(int i=0; i<10000; i++)
275 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
277 unsigned int retVal = 0;
279 if ((address >= 0x000000) && (address <= 0x3FFFFE))
280 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
281 else if ((address >= 0x800000) && (address <= 0xDFFFFE))
282 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
283 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
284 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
285 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
286 retVal = CDROMReadWord(address, M68K);
287 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
288 retVal = TOMReadWord(address, M68K);
289 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
290 retVal = JERRYReadWord(address, M68K);
292 retVal = jaguar_unknown_readword(address, M68K);
297 unsigned int m68k_read_memory_32(unsigned int address)
299 //WriteLog("--> [RM32]\n");
300 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
303 void m68k_write_memory_8(unsigned int address, unsigned int value)
305 #ifdef CPU_DEBUG_MEMORY
306 if ((address >= 0x000000) && (address <= 0x3FFFFF))
310 if (value > writeMemMax[address])
311 writeMemMax[address] = value;
312 if (value < writeMemMin[address])
313 writeMemMin[address] = value;
317 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
318 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
319 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
320 if ((address >= 0x000000) && (address <= 0x3FFFFF))
321 jaguar_mainRam[address] = value;
322 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
323 CDROMWriteByte(address, value, M68K);
324 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
325 TOMWriteByte(address, value, M68K);
326 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
327 JERRYWriteByte(address, value, M68K);
329 jaguar_unknown_writebyte(address, value, M68K);
332 void m68k_write_memory_16(unsigned int address, unsigned int value)
334 #ifdef CPU_DEBUG_MEMORY
335 if ((address >= 0x000000) && (address <= 0x3FFFFE))
339 uint8 hi = value >> 8, lo = value & 0xFF;
341 if (hi > writeMemMax[address])
342 writeMemMax[address] = hi;
343 if (hi < writeMemMin[address])
344 writeMemMin[address] = hi;
346 if (lo > writeMemMax[address+1])
347 writeMemMax[address+1] = lo;
348 if (lo < writeMemMin[address+1])
349 writeMemMin[address+1] = lo;
353 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
354 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
355 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
356 //if (address >= 0xF02200 && address <= 0xF0229F)
357 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
358 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
359 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
360 /*extern uint32 totalFrames;
361 if (address == 0xF02114)
362 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
363 if (address == 0xF02110)
364 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
365 //if (address >= 0xF03B00 && address <= 0xF03DFF)
366 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
368 if ((address >= 0x000000) && (address <= 0x3FFFFE))
370 /* jaguar_mainRam[address] = value >> 8;
371 jaguar_mainRam[address + 1] = value & 0xFF;*/
372 SET16(jaguar_mainRam, address, value);
374 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
375 CDROMWriteWord(address, value, M68K);
376 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
377 TOMWriteWord(address, value, M68K);
378 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
379 JERRYWriteWord(address, value, M68K);
382 jaguar_unknown_writeword(address, value, M68K);
383 WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
384 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
385 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
389 void m68k_write_memory_32(unsigned int address, unsigned int value)
391 //WriteLog("--> [WM32]\n");
392 m68k_write_memory_16(address, value >> 16);
393 m68k_write_memory_16(address + 2, value & 0xFFFF);
397 uint32 jaguar_get_handler(uint32 i)
399 return JaguarReadLong(i * 4);
402 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
404 uint32 handler = jaguar_get_handler(i);
405 if (handler && (handler != 0xFFFFFFFF))
411 void M68K_show_context(void)
413 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
414 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
415 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
417 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
418 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
420 WriteLog("68K disasm\n");
421 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
422 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
423 // jaguar_dasm(0x5000, 0x14414);
425 WriteLog("..................\n");
427 if (tom_irq_enabled(IRQ_VBLANK))
429 WriteLog("vblank int: enabled\n");
430 jaguar_dasm(jaguar_get_handler(64), 0x200);
433 WriteLog("vblank int: disabled\n");
435 WriteLog("..................\n");
437 for(int i=0; i<256; i++)
438 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
442 // Unknown read/write byte/word routines
445 // It's hard to believe that developers would be sloppy with their memory writes, yet in
446 // some cases the developers screwed up royal. E.g., Club Drive has the following code:
448 // 807EC4: movea.l #$f1b000, A1
449 // 807ECA: movea.l #$8129e0, A0
450 // 807ED0: move.l A0, D0
451 // 807ED2: move.l #$f1bb94, D1
452 // 807ED8: sub.l D0, D1
453 // 807EDA: lsr.l #2, D1
454 // 807EDC: move.l (A0)+, (A1)+
455 // 807EDE: dbra D1, 807edc
457 // The problem is at $807ED0--instead of putting A0 into D0, they really meant to put A1
458 // in. This mistake causes it to try and overwrite approximately $700000 worth of address
459 // space! (That is, unless the 68K causes a bus error...)
461 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
463 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
464 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));
465 extern bool finished;
467 extern bool doDSPDis;
473 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
475 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
476 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));
477 extern bool finished;
479 extern bool doDSPDis;
485 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
487 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
488 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
489 extern bool finished;
491 extern bool doDSPDis;
498 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
500 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
501 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
502 extern bool finished;
504 extern bool doDSPDis;
512 // Disassemble M68K instructions at the given offset
515 unsigned int m68k_read_disassembler_8(unsigned int address)
517 return m68k_read_memory_8(address);
520 unsigned int m68k_read_disassembler_16(unsigned int address)
522 return m68k_read_memory_16(address);
525 unsigned int m68k_read_disassembler_32(unsigned int address)
527 return m68k_read_memory_32(address);
530 void jaguar_dasm(uint32 offset, uint32 qt)
533 static char buffer[2048];//, mem[64];
534 int pc = offset, oldpc;
536 for(uint32 i=0; i<qt; i++)
539 for(int j=0; j<64; j++)
540 mem[j^0x01] = jaguar_byte_read(pc + j);
542 pc += Dasm68000((char *)mem, buffer, 0);
543 WriteLog("%08X: %s\n", oldpc, buffer);//*/
545 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
546 WriteLog("%08X: %s\n", oldpc, buffer);//*/
551 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
556 if (offset < 0x400000)
557 data = jaguar_mainRam[offset & 0x3FFFFF];
558 else if ((offset >= 0x800000) && (offset < 0xC00000))
559 data = jaguar_mainRom[offset - 0x800000];
560 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
561 data = CDROMReadByte(offset, who);
562 else if ((offset >= 0xE00000) && (offset < 0xE40000))
563 data = jaguar_bootRom[offset & 0x3FFFF];
564 else if ((offset >= 0xF00000) && (offset < 0xF10000))
565 data = TOMReadByte(offset, who);
566 else if ((offset >= 0xF10000) && (offset < 0xF20000))
567 data = JERRYReadByte(offset, who);
569 data = jaguar_unknown_readbyte(offset, who);
574 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
577 if (offset <= 0x3FFFFE)
579 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
581 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
584 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
586 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
587 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
588 return CDROMReadWord(offset, who);
589 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
590 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
591 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
592 return TOMReadWord(offset, who);
593 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
594 return JERRYReadWord(offset, who);
596 return jaguar_unknown_readword(offset, who);
599 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
602 if (offset < 0x400000)
604 jaguar_mainRam[offset & 0x3FFFFF] = data;
607 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
609 CDROMWriteByte(offset, data, who);
612 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
614 TOMWriteByte(offset, data, who);
617 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
619 JERRYWriteByte(offset, data, who);
623 jaguar_unknown_writebyte(offset, data, who);
626 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
628 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
629 // PLUS, you would handle this in the GPU/DSP WriteLong code! Not here!
632 if (offset <= 0x3FFFFE)
634 //This MUST be done by the 68K!
635 /*if (offset == 0x670C)
636 WriteLog("Jaguar: %s writing to location $670C...\n", whoName[who]);*/
638 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
639 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
642 else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
644 CDROMWriteWord(offset, data, who);
647 else if (offset >= 0xF00000 && offset <= 0xF0FFFE)
649 TOMWriteWord(offset, data, who);
652 else if (offset >= 0xF10000 && offset <= 0xF1FFFE)
654 JERRYWriteWord(offset, data, who);
657 // Don't bomb on attempts to write to ROM
658 else if (offset >= 0x800000 && offset <= 0xEFFFFF)
661 jaguar_unknown_writeword(offset, data, who);
664 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
665 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
667 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
670 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
671 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
673 /* extern bool doDSPDis;
674 if (offset < 0x400 && !doDSPDis)
676 WriteLog("JLW: Write to %08X by %s... Starting DSP log!\n\n", offset, whoName[who]);
680 JaguarWriteWord(offset, data >> 16, who);
681 JaguarWriteWord(offset+2, data & 0xFFFF, who);
685 // Jaguar console initialization
687 void jaguar_init(void)
689 #ifdef CPU_DEBUG_MEMORY
690 memset(readMem, 0x00, 0x400000);
691 memset(writeMemMin, 0xFF, 0x400000);
692 memset(writeMemMax, 0x00, 0x400000);
694 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
695 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
696 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
697 memset(jaguar_mainRam, 0x00, 0x400000);
698 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
699 // memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
700 //NOTE: This *doesn't* fix FlipOut...
701 memset(jaguar_mainRom, 0x01, 0x600000); // & set it to all 01s...
703 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
704 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
705 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
706 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
707 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
708 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
710 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
718 void jaguar_done(void)
720 #ifdef CPU_DEBUG_MEMORY
721 /* WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
722 jaguar_dasm(0x8D0D44, 5000);
724 /* WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
725 jaguar_dasm(0x806300, 5000);
728 /* WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
730 for(uint32 i=0; i<=raPtr; i++)
732 WriteLog("\t%08X\n", returnAddr[i]);
733 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
734 jaguar_dasm(returnAddr[i] - 16, 16);
739 /* int start = 0, end = 0;
740 bool endTriggered = false, startTriggered = false;
741 for(int i=0; i<0x400000; i++)
743 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
746 startTriggered = true, endTriggered = false, start = i;
748 WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
754 end = i - 1, endTriggered = true, startTriggered = false;
755 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
762 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
763 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
764 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
765 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
766 for(int i=-2; i<9; i++)
767 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
769 /* WriteLog("\nM68000 disassembly at $802288...\n");
770 jaguar_dasm(0x802288, 3);
771 WriteLog("\nM68000 disassembly at $802200...\n");
772 jaguar_dasm(0x802200, 500);
773 WriteLog("\nM68000 disassembly at $802518...\n");
774 jaguar_dasm(0x802518, 100);//*/
776 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
777 jaguar_dasm(0x803F00, 500);
780 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
781 jaguar_dasm(0x802B00, 500);
784 /* WriteLog("\n\nM68000 disassembly at $809900 (look @ $8099F8)...\n");
785 jaguar_dasm(0x809900, 500);
788 /* WriteLog("\n\nDump of $8093C8:\n\n");
789 for(int i=0x8093C8; i<0x809900; i+=4)
790 WriteLog("%06X: %08X\n", i, JaguarReadLong(i));//*/
791 /* WriteLog("\n\nM68000 disassembly at $90006C...\n");
792 jaguar_dasm(0x90006C, 500);
795 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
796 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
797 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
808 memory_free(jaguar_mainRom);
809 memory_free(jaguar_bootRom);
810 memory_free(jaguar_mainRam);
813 void jaguar_reset(void)
815 if (vjs.useJaguarBIOS)
816 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
819 SET32(jaguar_mainRam, 4, 0x00802000);
820 // Handle PD stuff...
821 // This should definitely go elsewhere (like in the cart load section)!
822 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
824 uint32 runAddress = GET32(jaguar_mainRom, 0x2A);
825 uint32 progLength = GET32(jaguar_mainRom, 0x02);
826 WriteLog("Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
827 memcpy(jaguar_mainRam + runAddress, jaguar_mainRom + 0x2E, progLength);
828 SET32(jaguar_mainRam, 4, runAddress);
832 // WriteLog("jaguar_reset():\n");
833 //#ifdef SOUND_OUTPUT
842 m68k_pulse_reset(); // Reset the 68000
843 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
847 // Main Jaguar execution loop (1 frame)
849 void JaguarExecute(int16 * backbuffer, bool render)
851 uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
852 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
853 // uint16 vdb = TOMReadWord(0xF00046);
854 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
855 // uint16 vbb = TOMReadWord(0xF00040);
856 //It seems that they mean it when they say that VDE is the end of object processing.
857 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
858 //buffer and not to write any more pixels... !!! FIX !!!
859 // uint16 vde = TOMReadWord(0xF00048);
861 uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
862 // Should these be hardwired or read from VP? Yes, from VP!
863 uint32 M68KCyclesPerScanline
864 = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
865 uint32 RISCCyclesPerScanline
866 = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
868 TOMResetBackbuffer(backbuffer);
869 /*extern int effect_start;
872 WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
875 for(uint16 i=0; i<vp; i++)
877 // Increment the horizontal count (why? RNG?)
878 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
880 TOMWriteWord(0xF00006, i); // Write the VC
882 if (i == vi) // Time for Vertical Interrupt?
884 if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
886 // We don't have to worry about autovectors & whatnot because the Jaguar
887 // tells you through its HW registers who sent the interrupt...
888 tom_set_pending_video_int();
893 // uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
894 // if (invalid_instruction_address != 0x80000000)
895 // cd_bios_process(invalid_instruction_address);
896 m68k_execute(M68KCyclesPerScanline);
897 // No CD handling... !!! FIX !!!
898 cd_bios_exec(i); // NOTE: Ignores parameter...
899 TOMExecPIT(RISCCyclesPerScanline);
900 jerry_pit_exec(RISCCyclesPerScanline);
901 jerry_i2s_exec(RISCCyclesPerScanline);
902 gpu_exec(RISCCyclesPerScanline);
905 // DSPExec(RISCCyclesPerScanline); // Ordinary non-pipelined DSP
906 DSPExecP2(RISCCyclesPerScanline); // Pipelined DSP execution (3 stage)...
907 // DSPExecComp(RISCCyclesPerScanline); // Comparison core
909 TOMExecScanline(i, render);
913 // Temp debugging stuff
915 void DumpMainMemory(void)
917 FILE * fp = fopen("./memdump.bin", "wb");
922 fwrite(jaguar_mainRam, 1, 0x400000, fp);
926 uint8 * GetRamPtr(void)
928 return jaguar_mainRam;