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 // These values are overridden by command line switches...
45 //extern bool dsp_enabled;
46 //extern bool jaguar_use_bios; // Default is now to USE the BIOS
47 uint32 jaguar_active_memory_dumps = 0;
49 uint32 jaguar_mainRom_crc32;
51 /*static*/ uint8 * jaguar_mainRam = NULL;
52 /*static*/ uint8 * jaguar_bootRom = NULL;
53 /*static*/ uint8 * jaguar_mainRom = NULL;
54 #ifdef CPU_DEBUG_MEMORY
55 uint8 writeMemMax[0x400000], writeMemMin[0x400000];
56 uint8 readMem[0x400000];
57 uint32 returnAddr[4000], raPtr = 0xFFFFFFFF;
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);
68 /* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
70 static char buffer[2048];
71 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
72 WriteLog("%08X: %s", m68kPC, buffer);
73 WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
74 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
75 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
77 /* if (m68kPC == 0x8D0E48 && effect_start5)
79 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
85 /* uint16 opcode = JaguarReadWord(m68kPC);
86 if (opcode == 0x4E75) // RTS
89 // WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
91 uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
93 if (raPtr != 0xFFFFFFFF)
95 for(uint32 i=0; i<=raPtr; i++)
97 if (returnAddr[i] == addr)
106 returnAddr[++raPtr] = addr;
110 /* static char buffer[2048];
111 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
112 WriteLog("%08X: %s \t\tD0=%08X, A0=%08X\n", m68kPC, buffer, m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_A0));//*/
114 /* if (m68kPC == 0x803F16)
116 WriteLog("M68K: Registers found at $803F16:\n");
117 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
118 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
119 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
121 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
122 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
125 if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
127 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
128 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
129 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
130 for(int i=0; i<10; i++)
131 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
132 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
140 // Musashi 68000 read/write/IRQ functions
143 int irq_ack_handler(int level)
145 int vector = M68K_INT_ACK_AUTOVECTOR;
147 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
151 m68k_set_irq(0); // Clear the IRQ...
152 vector = 64; // Set user interrupt #0
158 unsigned int m68k_read_memory_8(unsigned int address)
160 #ifdef CPU_DEBUG_MEMORY
161 if ((address >= 0x000000) && (address <= 0x3FFFFF))
164 readMem[address] = 1;
167 //WriteLog("[RM8] Addr: %08X\n", address);
168 unsigned int retVal = 0;
170 if ((address >= 0x000000) && (address <= 0x3FFFFF))
171 retVal = jaguar_mainRam[address];
172 else if ((address >= 0x800000) && (address <= 0xDFFFFF))
173 retVal = jaguar_mainRom[address - 0x800000];
174 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
175 retVal = jaguar_bootRom[address - 0xE00000];
176 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
177 retVal = CDROMReadByte(address);
178 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
179 retVal = TOMReadByte(address, M68K);
180 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
181 retVal = JERRYReadByte(address, M68K);
183 retVal = jaguar_unknown_readbyte(address, M68K);
188 void gpu_dump_disassembly(void);
189 void gpu_dump_registers(void);
191 unsigned int m68k_read_memory_16(unsigned int address)
193 #ifdef CPU_DEBUG_MEMORY
194 /* if ((address >= 0x000000) && (address <= 0x3FFFFE))
197 readMem[address] = 1, readMem[address + 1] = 1;
199 /* if (effect_start && (address >= 0x8064FC && address <= 0x806501))
201 return 0x4E71; // NOP
203 if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
205 return 0x4E71; // NOP
207 if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
209 return 0x4E71; // NOP
211 if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
213 return 0x4E71; // NOP
215 if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
217 return 0x4E71; // NOP
219 if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
221 return 0x4E71; // NOP
224 //WriteLog("[RM16] Addr: %08X\n", address);
225 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
226 // for(int i=0; i<10000; i++)
227 WriteLog("[M68K] In routine #6!\n");//*/
228 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
229 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
230 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
232 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
233 gpu_dump_registers();
234 gpu_dump_disassembly();
235 // for(int i=0; i<10000; i++)
236 // WriteLog("[M68K] About to run GPU!\n");
238 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
239 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
241 if (address == 0x000066A0)
243 gpu_dump_registers();
244 gpu_dump_disassembly();
246 for(int i=0; i<10000; i++)
247 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
249 unsigned int retVal = 0;
251 if ((address >= 0x000000) && (address <= 0x3FFFFE))
252 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
253 else if ((address >= 0x800000) && (address <= 0xDFFFFE))
254 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
255 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
256 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
257 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
258 retVal = CDROMReadWord(address, M68K);
259 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
260 retVal = TOMReadWord(address, M68K);
261 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
262 retVal = JERRYReadWord(address, M68K);
264 retVal = jaguar_unknown_readword(address, M68K);
269 unsigned int m68k_read_memory_32(unsigned int address)
271 //WriteLog("--> [RM32]\n");
272 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
275 void m68k_write_memory_8(unsigned int address, unsigned int value)
277 #ifdef CPU_DEBUG_MEMORY
278 if ((address >= 0x000000) && (address <= 0x3FFFFF))
282 if (value > writeMemMax[address])
283 writeMemMax[address] = value;
284 if (value < writeMemMin[address])
285 writeMemMin[address] = value;
289 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
290 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
291 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
292 if ((address >= 0x000000) && (address <= 0x3FFFFF))
293 jaguar_mainRam[address] = value;
294 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
295 CDROMWriteByte(address, value, M68K);
296 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
297 TOMWriteByte(address, value, M68K);
298 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
299 JERRYWriteByte(address, value, M68K);
301 jaguar_unknown_writebyte(address, value, M68K);
304 void m68k_write_memory_16(unsigned int address, unsigned int value)
306 #ifdef CPU_DEBUG_MEMORY
307 if ((address >= 0x000000) && (address <= 0x3FFFFE))
311 uint8 hi = value >> 8, lo = value & 0xFF;
313 if (hi > writeMemMax[address])
314 writeMemMax[address] = hi;
315 if (hi < writeMemMin[address])
316 writeMemMin[address] = hi;
318 if (lo > writeMemMax[address+1])
319 writeMemMax[address+1] = lo;
320 if (lo < writeMemMin[address+1])
321 writeMemMin[address+1] = lo;
325 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
326 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
327 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
328 //if (address >= 0xF02200 && address <= 0xF0229F)
329 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
330 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
331 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
332 /*extern uint32 totalFrames;
333 if (address == 0xF02114)
334 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
335 if (address == 0xF02110)
336 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
337 //if (address >= 0xF03B00 && address <= 0xF03DFF)
338 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
340 if ((address >= 0x000000) && (address <= 0x3FFFFE))
342 /* jaguar_mainRam[address] = value >> 8;
343 jaguar_mainRam[address + 1] = value & 0xFF;*/
344 SET16(jaguar_mainRam, address, value);
346 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
347 CDROMWriteWord(address, value, M68K);
348 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
349 TOMWriteWord(address, value, M68K);
350 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
351 JERRYWriteWord(address, value, M68K);
354 jaguar_unknown_writeword(address, value, M68K);
355 WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
356 m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
357 m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
361 void m68k_write_memory_32(unsigned int address, unsigned int value)
363 //WriteLog("--> [WM32]\n");
364 m68k_write_memory_16(address, value >> 16);
365 m68k_write_memory_16(address + 2, value & 0xFFFF);
369 uint32 jaguar_get_handler(uint32 i)
371 return JaguarReadLong(i * 4);
374 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
376 uint32 handler = jaguar_get_handler(i);
377 if (handler && (handler != 0xFFFFFFFF))
383 void M68K_show_context(void)
385 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
386 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
387 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
389 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
390 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
392 WriteLog("68K disasm\n");
393 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
394 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
395 // jaguar_dasm(0x5000, 0x14414);
397 WriteLog("..................\n");
399 if (tom_irq_enabled(IRQ_VBLANK))
401 WriteLog("vblank int: enabled\n");
402 jaguar_dasm(jaguar_get_handler(64), 0x200);
405 WriteLog("vblank int: disabled\n");
407 WriteLog("..................\n");
409 for(int i=0; i<256; i++)
410 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
414 // Unknown read/write byte/word routines
417 // It's hard to believe that developers would be sloppy with their memory writes, yet in
418 // some cases the developers screwed up royal. E.g., Club Drive has the following code:
420 // 807EC4: movea.l #$f1b000, A1
421 // 807ECA: movea.l #$8129e0, A0
422 // 807ED0: move.l A0, D0
423 // 807ED2: move.l #$f1bb94, D1
424 // 807ED8: sub.l D0, D1
425 // 807EDA: lsr.l #2, D1
426 // 807EDC: move.l (A0)+, (A1)+
427 // 807EDE: dbra D1, 807edc
429 // The problem is at $807ED0--instead of putting A0 into D0, they really meant to put A1
430 // in. This mistake causes it to try and overwrite approximately $700000 worth of address
431 // space! (That is, unless the 68K causes a bus error...)
433 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
435 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
436 WriteLog("Jaguar: Unknown byte %02X written at %08X by %s (M68K PC=%06X)\n", data, address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
437 extern bool finished;
439 extern bool doDSPDis;
445 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
447 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
448 WriteLog("Jaguar: Unknown word %04X written at %08X by %s (M68K PC=%06X)\n", data, address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
449 extern bool finished;
451 extern bool doDSPDis;
457 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
459 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
460 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
461 extern bool finished;
463 extern bool doDSPDis;
470 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
472 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
473 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
474 extern bool finished;
476 extern bool doDSPDis;
484 // Disassemble M68K instructions at the given offset
487 unsigned int m68k_read_disassembler_8(unsigned int address)
489 return m68k_read_memory_8(address);
492 unsigned int m68k_read_disassembler_16(unsigned int address)
494 return m68k_read_memory_16(address);
497 unsigned int m68k_read_disassembler_32(unsigned int address)
499 return m68k_read_memory_32(address);
502 void jaguar_dasm(uint32 offset, uint32 qt)
505 static char buffer[2048];//, mem[64];
506 int pc = offset, oldpc;
508 for(uint32 i=0; i<qt; i++)
511 for(int j=0; j<64; j++)
512 mem[j^0x01] = jaguar_byte_read(pc + j);
514 pc += Dasm68000((char *)mem, buffer, 0);
515 WriteLog("%08X: %s\n", oldpc, buffer);//*/
517 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
518 WriteLog("%08X: %s\n", oldpc, buffer);//*/
523 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
528 if (offset < 0x400000)
529 data = jaguar_mainRam[offset & 0x3FFFFF];
530 else if ((offset >= 0x800000) && (offset < 0xC00000))
531 data = jaguar_mainRom[offset - 0x800000];
532 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
533 data = CDROMReadByte(offset, who);
534 else if ((offset >= 0xE00000) && (offset < 0xE40000))
535 data = jaguar_bootRom[offset & 0x3FFFF];
536 else if ((offset >= 0xF00000) && (offset < 0xF10000))
537 data = TOMReadByte(offset, who);
538 else if ((offset >= 0xF10000) && (offset < 0xF20000))
539 data = JERRYReadByte(offset, who);
541 data = jaguar_unknown_readbyte(offset, who);
546 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
549 if (offset <= 0x3FFFFE)
551 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
553 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
556 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
558 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
559 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
560 return CDROMReadWord(offset, who);
561 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
562 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
563 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
564 return TOMReadWord(offset, who);
565 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
566 return JERRYReadWord(offset, who);
568 return jaguar_unknown_readword(offset, who);
571 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
574 if (offset < 0x400000)
576 jaguar_mainRam[offset & 0x3FFFFF] = data;
579 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
581 CDROMWriteByte(offset, data, who);
584 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
586 TOMWriteByte(offset, data, who);
589 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
591 JERRYWriteByte(offset, data, who);
595 jaguar_unknown_writebyte(offset, data, who);
598 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
600 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
601 // PLUS, you would handle this in the GPU/DSP WriteLong code! Not here!
604 if (offset <= 0x3FFFFE)
606 //This MUST be done by the 68K!
607 /*if (offset == 0x670C)
608 WriteLog("Jaguar: %s writing to location $670C...\n", whoName[who]);*/
610 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
611 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
614 else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
616 CDROMWriteWord(offset, data, who);
619 else if (offset >= 0xF00000 && offset <= 0xF0FFFE)
621 TOMWriteWord(offset, data, who);
624 else if (offset >= 0xF10000 && offset <= 0xF1FFFE)
626 JERRYWriteWord(offset, data, who);
629 // Don't bomb on attempts to write to ROM
630 else if (offset >= 0x800000 && offset <= 0xEFFFFF)
633 jaguar_unknown_writeword(offset, data, who);
636 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
637 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
639 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
642 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
643 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
645 JaguarWriteWord(offset, data >> 16, who);
646 JaguarWriteWord(offset+2, data & 0xFFFF, who);
650 // Jaguar console initialization
652 void jaguar_init(void)
654 #ifdef CPU_DEBUG_MEMORY
655 memset(readMem, 0x00, 0x400000);
656 memset(writeMemMin, 0xFF, 0x400000);
657 memset(writeMemMax, 0x00, 0x400000);
659 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
660 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
661 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
662 memset(jaguar_mainRam, 0x00, 0x400000);
663 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
664 // memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
665 //NOTE: This *doesn't* fix FlipOut...
666 memset(jaguar_mainRom, 0x01, 0x600000); // & set it to all 01s...
668 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
669 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
670 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
671 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
672 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
673 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
675 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
683 void jaguar_done(void)
685 #ifdef CPU_DEBUG_MEMORY
686 /* WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
687 jaguar_dasm(0x8D0D44, 5000);
689 /* WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
690 jaguar_dasm(0x806300, 5000);
693 /* WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
695 for(uint32 i=0; i<=raPtr; i++)
697 WriteLog("\t%08X\n", returnAddr[i]);
698 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
699 jaguar_dasm(returnAddr[i] - 16, 16);
704 /* int start = 0, end = 0;
705 bool endTriggered = false, startTriggered = false;
706 for(int i=0; i<0x400000; i++)
708 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
711 startTriggered = true, endTriggered = false, start = i;
713 WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
719 end = i - 1, endTriggered = true, startTriggered = false;
720 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
727 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
728 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
729 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
730 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
731 for(int i=-2; i<9; i++)
732 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
734 /* WriteLog("\nM68000 disassembly at $802288...\n");
735 jaguar_dasm(0x802288, 3);
736 WriteLog("\nM68000 disassembly at $802200...\n");
737 jaguar_dasm(0x802200, 500);
738 WriteLog("\nM68000 disassembly at $802518...\n");
739 jaguar_dasm(0x802518, 100);//*/
741 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
742 jaguar_dasm(0x803F00, 500);
745 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
746 jaguar_dasm(0x802B00, 500);
749 /* WriteLog("\n\nM68000 disassembly at $809900 (look @ $8099F8)...\n");
750 jaguar_dasm(0x809900, 500);
753 /* WriteLog("\n\nDump of $8093C8:\n\n");
754 for(int i=0x8093C8; i<0x809900; i+=4)
755 WriteLog("%06X: %08X\n", i, JaguarReadLong(i));//*/
756 /* WriteLog("\n\nM68000 disassembly at $90006C...\n");
757 jaguar_dasm(0x90006C, 500);
760 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
761 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
762 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
773 memory_free(jaguar_mainRom);
774 memory_free(jaguar_bootRom);
775 memory_free(jaguar_mainRam);
778 void jaguar_reset(void)
780 if (vjs.useJaguarBIOS)
781 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
784 SET32(jaguar_mainRam, 4, 0x00802000);
785 // Handle PD stuff...
786 // This should definitely go elsewhere (like in the cart load section)!
787 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
789 uint32 runAddress = GET32(jaguar_mainRom, 0x2A);
790 uint32 progLength = GET32(jaguar_mainRom, 0x02);
791 WriteLog("Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
792 memcpy(jaguar_mainRam + runAddress, jaguar_mainRom + 0x2E, progLength);
793 SET32(jaguar_mainRam, 4, runAddress);
797 // WriteLog("jaguar_reset():\n");
798 //#ifdef SOUND_OUTPUT
807 m68k_pulse_reset(); // Reset the 68000
808 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
812 // Main Jaguar execution loop (1 frame)
814 void JaguarExecute(int16 * backbuffer, bool render)
816 uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
817 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
818 // uint16 vdb = TOMReadWord(0xF00046);
819 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
820 // uint16 vbb = TOMReadWord(0xF00040);
821 //It seems that they mean it when they say that VDE is the end of object processing.
822 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
823 //buffer and not to write any more pixels... !!! FIX !!!
824 // uint16 vde = TOMReadWord(0xF00048);
826 uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
827 // Should these be hardwired or read from VP? Yes, from VP!
828 uint32 M68KCyclesPerScanline
829 = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
830 uint32 RISCCyclesPerScanline
831 = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
833 TOMResetBackbuffer(backbuffer);
834 /*extern int effect_start;
837 WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
840 for(uint16 i=0; i<vp; i++)
842 // Increment the horizontal count (why? RNG?)
843 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
845 TOMWriteWord(0xF00006, i); // Write the VC
847 if (i == vi) // Time for Vertical Interrupt?
849 if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
851 // We don't have to worry about autovectors & whatnot because the Jaguar
852 // tells you through its HW registers who sent the interrupt...
853 tom_set_pending_video_int();
858 // uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
859 // if (invalid_instruction_address != 0x80000000)
860 // cd_bios_process(invalid_instruction_address);
861 m68k_execute(M68KCyclesPerScanline);
862 // No CD handling... !!! FIX !!!
863 cd_bios_exec(i); // NOTE: Ignores parameter...
864 TOMExecPIT(RISCCyclesPerScanline);
865 jerry_pit_exec(RISCCyclesPerScanline);
866 jerry_i2s_exec(RISCCyclesPerScanline);
867 gpu_exec(RISCCyclesPerScanline);
870 // DSPExec(RISCCyclesPerScanline);
871 // Do pipelined DSP execution...
872 DSPExecP3(RISCCyclesPerScanline);
874 TOMExecScanline(i, render);
878 // Temp debugging stuff
880 void DumpMainMemory(void)
882 FILE * fp = fopen("./memdump.bin", "wb");
887 fwrite(jaguar_mainRam, 1, 0x400000, fp);
891 uint8 * GetRamPtr(void)
893 return jaguar_mainRam;