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 CPU_DEBUG_MEMORY
22 // Private function prototypes
24 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who = UNKNOWN);
25 unsigned jaguar_unknown_readword(unsigned address, uint32 who = UNKNOWN);
26 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who = UNKNOWN);
27 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who = UNKNOWN);
28 void M68K_show_context(void);
32 //extern bool hardwareTypeNTSC; // Set to false for PAL
33 #ifdef CPU_DEBUG_MEMORY
34 extern bool startMemLog; // Set by "e" key
35 extern int effect_start;
36 extern int effect_start2, effect_start3, effect_start4, effect_start5, effect_start6;
39 // Memory debugging identifiers
42 { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
44 uint32 jaguar_active_memory_dumps = 0;
46 uint32 jaguar_mainRom_crc32, jaguarRomSize, jaguarRunAddress;
48 /*static*/ uint8 * jaguar_mainRam = NULL;
49 /*static*/ uint8 * jaguar_bootRom = NULL;
50 /*static*/ uint8 * jaguar_mainRom = NULL;
52 #ifdef CPU_DEBUG_MEMORY
53 uint8 writeMemMax[0x400000], writeMemMin[0x400000];
54 uint8 readMem[0x400000];
55 uint32 returnAddr[4000], raPtr = 0xFFFFFFFF;
58 uint32 pcQueue[0x400];
62 // Callback function to detect illegal instructions
64 //void GPUDumpDisassembly(void);
65 //void GPUDumpRegisters(void);
66 void M68KInstructionHook(void)
68 uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
71 // Ideally, we'd save all the registers as well...
72 pcQueue[pcQPtr++] = m68kPC;
75 if (m68kPC & 0x01) // Oops! We're fetching an odd address!
77 WriteLog("M68K: Attempted to execute from an odd adress!\n\nBacktrace:\n\n");
79 static char buffer[2048];
80 for(int i=0; i<0x400; i++)
82 m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], M68K_CPU_TYPE_68000);
83 WriteLog("\t%08X: %s\n", pcQueue[(pcQPtr + i) & 0x3FF], buffer);
87 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
88 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
89 for(int i=0; i<10; i++)
90 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
91 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
97 /* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
99 static char buffer[2048];
100 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
101 WriteLog("%08X: %s", m68kPC, buffer);
102 WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
103 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
104 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
106 /* if (m68kPC == 0x8D0E48 && effect_start5)
108 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
110 GPUDumpDisassembly();
114 /* uint16 opcode = JaguarReadWord(m68kPC);
115 if (opcode == 0x4E75) // RTS
118 // WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
120 uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
122 if (raPtr != 0xFFFFFFFF)
124 for(uint32 i=0; i<=raPtr; i++)
126 if (returnAddr[i] == addr)
135 returnAddr[++raPtr] = addr;
139 /* static char buffer[2048];
140 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
141 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));//*/
143 /* if (m68kPC == 0x803F16)
145 WriteLog("M68K: Registers found at $803F16:\n");
146 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
147 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
148 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
150 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
151 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
154 if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
156 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
157 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
158 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
159 for(int i=0; i<10; i++)
160 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
161 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
169 // Musashi 68000 read/write/IRQ functions
172 int irq_ack_handler(int level)
174 int vector = M68K_INT_ACK_AUTOVECTOR;
176 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
180 m68k_set_irq(0); // Clear the IRQ...
181 vector = 64; // Set user interrupt #0
187 unsigned int m68k_read_memory_8(unsigned int address)
189 #ifdef CPU_DEBUG_MEMORY
190 if ((address >= 0x000000) && (address <= 0x3FFFFF))
193 readMem[address] = 1;
196 //WriteLog("[RM8] Addr: %08X\n", address);
197 unsigned int retVal = 0;
199 if ((address >= 0x000000) && (address <= 0x3FFFFF))
200 retVal = jaguar_mainRam[address];
201 else if ((address >= 0x800000) && (address <= 0xDFFFFF))
202 retVal = jaguar_mainRom[address - 0x800000];
203 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
204 retVal = jaguar_bootRom[address - 0xE00000];
205 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
206 retVal = CDROMReadByte(address);
207 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
208 retVal = TOMReadByte(address, M68K);
209 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
210 retVal = JERRYReadByte(address, M68K);
212 retVal = jaguar_unknown_readbyte(address, M68K);
217 void gpu_dump_disassembly(void);
218 void gpu_dump_registers(void);
220 unsigned int m68k_read_memory_16(unsigned int address)
222 #ifdef CPU_DEBUG_MEMORY
223 /* if ((address >= 0x000000) && (address <= 0x3FFFFE))
226 readMem[address] = 1, readMem[address + 1] = 1;
228 /* if (effect_start && (address >= 0x8064FC && address <= 0x806501))
230 return 0x4E71; // NOP
232 if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
234 return 0x4E71; // NOP
236 if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
238 return 0x4E71; // NOP
240 if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
242 return 0x4E71; // NOP
244 if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
246 return 0x4E71; // NOP
248 if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
250 return 0x4E71; // NOP
253 //WriteLog("[RM16] Addr: %08X\n", address);
254 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
255 // for(int i=0; i<10000; i++)
256 WriteLog("[M68K] In routine #6!\n");//*/
257 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
258 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
259 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
261 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
262 gpu_dump_registers();
263 gpu_dump_disassembly();
264 // for(int i=0; i<10000; i++)
265 // WriteLog("[M68K] About to run GPU!\n");
267 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
268 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
270 if (address == 0x000066A0)
272 gpu_dump_registers();
273 gpu_dump_disassembly();
275 for(int i=0; i<10000; i++)
276 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
278 unsigned int retVal = 0;
280 if ((address >= 0x000000) && (address <= 0x3FFFFE))
281 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
282 else if ((address >= 0x800000) && (address <= 0xDFFFFE))
283 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
284 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
285 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
286 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
287 retVal = CDROMReadWord(address, M68K);
288 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
289 retVal = TOMReadWord(address, M68K);
290 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
291 retVal = JERRYReadWord(address, M68K);
293 retVal = jaguar_unknown_readword(address, M68K);
298 unsigned int m68k_read_memory_32(unsigned int address)
300 //WriteLog("--> [RM32]\n");
301 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
304 void m68k_write_memory_8(unsigned int address, unsigned int value)
306 #ifdef CPU_DEBUG_MEMORY
307 if ((address >= 0x000000) && (address <= 0x3FFFFF))
311 if (value > writeMemMax[address])
312 writeMemMax[address] = value;
313 if (value < writeMemMin[address])
314 writeMemMin[address] = value;
318 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
319 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
320 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
321 if ((address >= 0x000000) && (address <= 0x3FFFFF))
322 jaguar_mainRam[address] = value;
323 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
324 CDROMWriteByte(address, value, M68K);
325 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
326 TOMWriteByte(address, value, M68K);
327 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
328 JERRYWriteByte(address, value, M68K);
330 jaguar_unknown_writebyte(address, value, M68K);
333 void m68k_write_memory_16(unsigned int address, unsigned int value)
335 #ifdef CPU_DEBUG_MEMORY
336 if ((address >= 0x000000) && (address <= 0x3FFFFE))
340 uint8 hi = value >> 8, lo = value & 0xFF;
342 if (hi > writeMemMax[address])
343 writeMemMax[address] = hi;
344 if (hi < writeMemMin[address])
345 writeMemMin[address] = hi;
347 if (lo > writeMemMax[address+1])
348 writeMemMax[address+1] = lo;
349 if (lo < writeMemMin[address+1])
350 writeMemMin[address+1] = lo;
354 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
355 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
356 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
357 //if (address >= 0xF02200 && address <= 0xF0229F)
358 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
359 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
360 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
361 /*extern uint32 totalFrames;
362 if (address == 0xF02114)
363 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
364 if (address == 0xF02110)
365 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
366 //if (address >= 0xF03B00 && address <= 0xF03DFF)
367 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
369 if ((address >= 0x000000) && (address <= 0x3FFFFE))
371 /* jaguar_mainRam[address] = value >> 8;
372 jaguar_mainRam[address + 1] = value & 0xFF;*/
373 SET16(jaguar_mainRam, address, value);
375 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
376 CDROMWriteWord(address, value, M68K);
377 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
378 TOMWriteWord(address, value, M68K);
379 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
380 JERRYWriteWord(address, value, M68K);
383 jaguar_unknown_writeword(address, value, M68K);
384 WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
385 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
386 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
390 void m68k_write_memory_32(unsigned int address, unsigned int value)
392 //WriteLog("--> [WM32]\n");
393 m68k_write_memory_16(address, value >> 16);
394 m68k_write_memory_16(address + 2, value & 0xFFFF);
398 uint32 jaguar_get_handler(uint32 i)
400 return JaguarReadLong(i * 4);
403 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
405 uint32 handler = jaguar_get_handler(i);
406 if (handler && (handler != 0xFFFFFFFF))
412 void M68K_show_context(void)
414 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
415 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
416 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
418 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
419 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
421 WriteLog("68K disasm\n");
422 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
423 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
424 // jaguar_dasm(0x5000, 0x14414);
426 WriteLog("..................\n");
428 if (tom_irq_enabled(IRQ_VBLANK))
430 WriteLog("vblank int: enabled\n");
431 jaguar_dasm(jaguar_get_handler(64), 0x200);
434 WriteLog("vblank int: disabled\n");
436 WriteLog("..................\n");
438 for(int i=0; i<256; i++)
439 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
443 // Unknown read/write byte/word routines
446 // It's hard to believe that developers would be sloppy with their memory writes, yet in
447 // some cases the developers screwed up royal. E.g., Club Drive has the following code:
449 // 807EC4: movea.l #$f1b000, A1
450 // 807ECA: movea.l #$8129e0, A0
451 // 807ED0: move.l A0, D0
452 // 807ED2: move.l #$f1bb94, D1
453 // 807ED8: sub.l D0, D1
454 // 807EDA: lsr.l #2, D1
455 // 807EDC: move.l (A0)+, (A1)+
456 // 807EDE: dbra D1, 807edc
458 // The problem is at $807ED0--instead of putting A0 into D0, they really meant to put A1
459 // in. This mistake causes it to try and overwrite approximately $700000 worth of address
460 // space! (That is, unless the 68K causes a bus error...)
462 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
464 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
465 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));
467 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
468 extern bool finished;
470 extern bool doDSPDis;
476 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
478 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
479 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));
481 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
482 extern bool finished;
484 extern bool doDSPDis;
490 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
492 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
493 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", 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;
505 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
507 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
508 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
510 #ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
511 extern bool finished;
513 extern bool doDSPDis;
521 // Disassemble M68K instructions at the given offset
524 unsigned int m68k_read_disassembler_8(unsigned int address)
526 return m68k_read_memory_8(address);
529 unsigned int m68k_read_disassembler_16(unsigned int address)
531 return m68k_read_memory_16(address);
534 unsigned int m68k_read_disassembler_32(unsigned int address)
536 return m68k_read_memory_32(address);
539 void jaguar_dasm(uint32 offset, uint32 qt)
542 static char buffer[2048];//, mem[64];
543 int pc = offset, oldpc;
545 for(uint32 i=0; i<qt; i++)
548 for(int j=0; j<64; j++)
549 mem[j^0x01] = jaguar_byte_read(pc + j);
551 pc += Dasm68000((char *)mem, buffer, 0);
552 WriteLog("%08X: %s\n", oldpc, buffer);//*/
554 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
555 WriteLog("%08X: %s\n", oldpc, buffer);//*/
560 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
565 if (offset < 0x400000)
566 data = jaguar_mainRam[offset & 0x3FFFFF];
567 else if ((offset >= 0x800000) && (offset < 0xC00000))
568 data = jaguar_mainRom[offset - 0x800000];
569 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
570 data = CDROMReadByte(offset, who);
571 else if ((offset >= 0xE00000) && (offset < 0xE40000))
572 data = jaguar_bootRom[offset & 0x3FFFF];
573 else if ((offset >= 0xF00000) && (offset < 0xF10000))
574 data = TOMReadByte(offset, who);
575 else if ((offset >= 0xF10000) && (offset < 0xF20000))
576 data = JERRYReadByte(offset, who);
578 data = jaguar_unknown_readbyte(offset, who);
583 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
586 if (offset <= 0x3FFFFE)
588 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
590 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
593 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
595 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
596 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
597 return CDROMReadWord(offset, who);
598 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
599 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
600 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
601 return TOMReadWord(offset, who);
602 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
603 return JERRYReadWord(offset, who);
605 return jaguar_unknown_readword(offset, who);
608 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
611 if (offset < 0x400000)
613 jaguar_mainRam[offset & 0x3FFFFF] = data;
616 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
618 CDROMWriteByte(offset, data, who);
621 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
623 TOMWriteByte(offset, data, who);
626 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
628 JERRYWriteByte(offset, data, who);
632 jaguar_unknown_writebyte(offset, data, who);
635 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
637 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
638 // PLUS, you would handle this in the GPU/DSP WriteLong code! Not here!
641 if (offset <= 0x3FFFFE)
643 //This MUST be done by the 68K!
644 /*if (offset == 0x670C)
645 WriteLog("Jaguar: %s writing to location $670C...\n", whoName[who]);*/
647 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
648 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
651 else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
653 CDROMWriteWord(offset, data, who);
656 else if (offset >= 0xF00000 && offset <= 0xF0FFFE)
658 TOMWriteWord(offset, data, who);
661 else if (offset >= 0xF10000 && offset <= 0xF1FFFE)
663 JERRYWriteWord(offset, data, who);
666 // Don't bomb on attempts to write to ROM
667 else if (offset >= 0x800000 && offset <= 0xEFFFFF)
670 jaguar_unknown_writeword(offset, data, who);
673 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
674 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
676 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
679 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
680 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
682 /* extern bool doDSPDis;
683 if (offset < 0x400 && !doDSPDis)
685 WriteLog("JLW: Write to %08X by %s... Starting DSP log!\n\n", offset, whoName[who]);
689 JaguarWriteWord(offset, data >> 16, who);
690 JaguarWriteWord(offset+2, data & 0xFFFF, who);
694 // Jaguar console initialization
696 void jaguar_init(void)
698 #ifdef CPU_DEBUG_MEMORY
699 memset(readMem, 0x00, 0x400000);
700 memset(writeMemMin, 0xFF, 0x400000);
701 memset(writeMemMax, 0x00, 0x400000);
703 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
704 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
705 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
706 memset(jaguar_mainRam, 0x00, 0x400000);
707 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
708 // memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
709 //NOTE: This *doesn't* fix FlipOut...
710 memset(jaguar_mainRom, 0x01, 0x600000); // & set it to all 01s...
712 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
713 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
714 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
715 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
716 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
717 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
719 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
727 void jaguar_done(void)
729 #ifdef CPU_DEBUG_MEMORY
730 /* WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
731 jaguar_dasm(0x8D0D44, 5000);
733 /* WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
734 jaguar_dasm(0x806300, 5000);
737 /* WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
739 for(uint32 i=0; i<=raPtr; i++)
741 WriteLog("\t%08X\n", returnAddr[i]);
742 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
743 jaguar_dasm(returnAddr[i] - 16, 16);
748 /* int start = 0, end = 0;
749 bool endTriggered = false, startTriggered = false;
750 for(int i=0; i<0x400000; i++)
752 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
755 startTriggered = true, endTriggered = false, start = i;
757 WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
763 end = i - 1, endTriggered = true, startTriggered = false;
764 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
771 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
772 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
773 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
774 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
775 for(int i=-2; i<9; i++)
776 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
778 /* WriteLog("\nM68000 disassembly at $802288...\n");
779 jaguar_dasm(0x802288, 3);
780 WriteLog("\nM68000 disassembly at $802200...\n");
781 jaguar_dasm(0x802200, 500);
782 WriteLog("\nM68000 disassembly at $802518...\n");
783 jaguar_dasm(0x802518, 100);//*/
785 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
786 jaguar_dasm(0x803F00, 500);
789 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
790 jaguar_dasm(0x802B00, 500);
793 /* WriteLog("\n\nM68000 disassembly at $809900 (look @ $8099F8)...\n");
794 jaguar_dasm(0x809900, 500);
797 /* WriteLog("\n\nDump of $8093C8:\n\n");
798 for(int i=0x8093C8; i<0x809900; i+=4)
799 WriteLog("%06X: %08X\n", i, JaguarReadLong(i));//*/
800 /* WriteLog("\n\nM68000 disassembly at $90006C...\n");
801 jaguar_dasm(0x90006C, 500);
804 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
805 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
806 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
817 memory_free(jaguar_mainRom);
818 memory_free(jaguar_bootRom);
819 memory_free(jaguar_mainRam);
822 void jaguar_reset(void)
824 if (vjs.useJaguarBIOS)
825 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
828 // Should also make a run address global as well, for when we reset the jag (PD mainly)
829 /* SET32(jaguar_mainRam, 4, 0x00802000);
830 // Handle PD stuff...
831 // This should definitely go elsewhere (like in the cart load section)!
832 //NOTE: The bytes 'JAGR' should also be at position $1C...
833 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
835 uint32 loadAddress = GET32(jaguar_mainRom, 0x22), runAddress = GET32(jaguar_mainRom, 0x2A);
836 //This is not always right! Especially when converted via bin2jag1!!!
837 //We should have access to the length of the furshlumiger file that was loaded anyway!
839 // uint32 progLength = GET32(jaguar_mainRom, 0x02);
842 // WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
843 // memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, progLength);
844 WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, jaguarRomSize - 0x2E);
845 memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, jaguarRomSize - 0x2E);
846 SET32(jaguar_mainRam, 4, runAddress);
848 SET32(jaguar_mainRam, 4, jaguarRunAddress);
851 // WriteLog("jaguar_reset():\n");
852 //#ifdef SOUND_OUTPUT
861 m68k_pulse_reset(); // Reset the 68000
862 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
866 // Main Jaguar execution loop (1 frame)
868 void JaguarExecute(int16 * backbuffer, bool render)
870 uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
871 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
872 // uint16 vdb = TOMReadWord(0xF00046);
873 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
874 // uint16 vbb = TOMReadWord(0xF00040);
875 //It seems that they mean it when they say that VDE is the end of object processing.
876 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
877 //buffer and not to write any more pixels... !!! FIX !!!
878 // uint16 vde = TOMReadWord(0xF00048);
880 uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
881 // Should these be hardwired or read from VP? Yes, from VP!
882 uint32 M68KCyclesPerScanline
883 = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
884 uint32 RISCCyclesPerScanline
885 = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
887 TOMResetBackbuffer(backbuffer);
888 /*extern int effect_start;
891 WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
894 //extern int start_logging;
895 for(uint16 i=0; i<vp; i++)
897 // Increment the horizontal count (why? RNG?)
898 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
900 TOMWriteWord(0xF00006, i); // Write the VC
902 if (i == vi) // Time for Vertical Interrupt?
904 if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
906 // We don't have to worry about autovectors & whatnot because the Jaguar
907 // tells you through its HW registers who sent the interrupt...
908 tom_set_pending_video_int();
913 // uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
914 // if (invalid_instruction_address != 0x80000000)
915 // cd_bios_process(invalid_instruction_address);
917 // WriteLog("About to execute M68K (%u)...\n", i);
918 m68k_execute(M68KCyclesPerScanline);
919 // No CD handling... !!! FIX !!!
921 // WriteLog("About to execute CD BIOS (%u)...\n", i);
922 cd_bios_exec(i); // NOTE: Ignores parameter...
924 // WriteLog("About to execute TOM's PIT (%u)...\n", i);
925 TOMExecPIT(RISCCyclesPerScanline);
927 // WriteLog("About to execute JERRY's PIT (%u)...\n", i);
928 jerry_pit_exec(RISCCyclesPerScanline);
930 // WriteLog("About to execute JERRY's SSI (%u)...\n", i);
931 jerry_i2s_exec(RISCCyclesPerScanline);
933 // WriteLog("About to execute GPU (%u)...\n", i);
934 gpu_exec(RISCCyclesPerScanline);
937 if (vjs.usePipelinedDSP)
938 DSPExecP2(RISCCyclesPerScanline); // Pipelined DSP execution (3 stage)...
940 DSPExec(RISCCyclesPerScanline); // Ordinary non-pipelined DSP
941 // DSPExecComp(RISCCyclesPerScanline); // Comparison core
944 // WriteLog("About to execute OP (%u)...\n", i);
945 TOMExecScanline(i, render);
949 // Temp debugging stuff
951 void DumpMainMemory(void)
953 FILE * fp = fopen("./memdump.bin", "wb");
958 fwrite(jaguar_mainRam, 1, 0x400000, fp);
962 uint8 * GetRamPtr(void)
964 return jaguar_mainRam;