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. :-)
12 //#include "m68kdasmAG.h"
15 //Do this in makefile??? Yes! Could, but it's easier to define here...
16 #define LOG_UNMAPPED_MEMORY_ACCESSES
17 #define CPU_DEBUG_MEMORY
19 // Private function prototypes
21 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who = UNKNOWN);
22 unsigned jaguar_unknown_readword(unsigned address, uint32 who = UNKNOWN);
23 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who = UNKNOWN);
24 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who = UNKNOWN);
25 void M68K_show_context(void);
29 extern bool hardwareTypeNTSC; // Set to false for PAL
30 #ifdef CPU_DEBUG_MEMORY
31 extern bool startMemLog; // Set by "e" key
32 extern int effect_start;
33 extern int effect_start2, effect_start3, effect_start4, effect_start5, effect_start6;
36 // Memory debugging identifiers
39 { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
41 // These values are overridden by command line switches...
43 bool dsp_enabled = false;
44 bool jaguar_use_bios = true; // Default is now to USE the BIOS
45 uint32 jaguar_active_memory_dumps = 0;
47 uint32 jaguar_mainRom_crc32;
49 /*static*/ uint8 * jaguar_mainRam = NULL;
50 /*static*/ uint8 * jaguar_bootRom = NULL;
51 /*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;
59 // Callback function to detect illegal instructions
61 //void GPUDumpDisassembly(void);
62 //void GPUDumpRegisters(void);
63 void M68KInstructionHook(void)
65 uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
66 /* if (m68kPC == 0x8D0E48 && effect_start5)
68 WriteLog("\nM68K: At collision detection code. Exiting!\n\n");
74 /* uint16 opcode = JaguarReadWord(m68kPC);
75 if (opcode == 0x4E75) // RTS
78 // WriteLog("Jaguar: Returning from subroutine to %08X\n", JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7)));
80 uint32 addr = JaguarReadLong(m68k_get_reg(NULL, M68K_REG_A7));
82 if (raPtr != 0xFFFFFFFF)
84 for(uint32 i=0; i<=raPtr; i++)
86 if (returnAddr[i] == addr)
95 returnAddr[++raPtr] = addr;
99 /* static char buffer[2048];
100 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
101 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));//*/
103 /* if (m68kPC == 0x803F16)
105 WriteLog("M68K: Registers found at $803F16:\n");
106 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
107 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
108 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
110 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
111 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
114 if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000))
116 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
117 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
118 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
119 for(int i=0; i<10; i++)
120 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
121 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
129 // Musashi 68000 read/write/IRQ functions
132 int irq_ack_handler(int level)
134 int vector = M68K_INT_ACK_AUTOVECTOR;
136 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
140 m68k_set_irq(0); // Clear the IRQ...
141 vector = 64; // Set user interrupt #0
147 unsigned int m68k_read_memory_8(unsigned int address)
149 #ifdef CPU_DEBUG_MEMORY
150 if ((address >= 0x000000) && (address <= 0x3FFFFF))
153 readMem[address] = 1;
156 //WriteLog("[RM8] Addr: %08X\n", address);
157 unsigned int retVal = 0;
159 if ((address >= 0x000000) && (address <= 0x3FFFFF))
160 retVal = jaguar_mainRam[address];
161 else if ((address >= 0x800000) && (address <= 0xDFFFFF))
162 retVal = jaguar_mainRom[address - 0x800000];
163 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
164 retVal = jaguar_bootRom[address - 0xE00000];
165 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
166 retVal = CDROMReadByte(address);
167 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
168 retVal = TOMReadByte(address, M68K);
169 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
170 retVal = JERRYReadByte(address, M68K);
172 retVal = jaguar_unknown_readbyte(address, M68K);
177 void gpu_dump_disassembly(void);
178 void gpu_dump_registers(void);
180 unsigned int m68k_read_memory_16(unsigned int address)
182 #ifdef CPU_DEBUG_MEMORY
183 /* if ((address >= 0x000000) && (address <= 0x3FFFFE))
186 readMem[address] = 1, readMem[address + 1] = 1;
188 /* if (effect_start && (address >= 0x8064FC && address <= 0x806501))
190 return 0x4E71; // NOP
192 if (effect_start2 && (address >= 0x806502 && address <= 0x806507))
194 return 0x4E71; // NOP
196 if (effect_start3 && (address >= 0x806512 && address <= 0x806517))
198 return 0x4E71; // NOP
200 if (effect_start4 && (address >= 0x806524 && address <= 0x806527))
202 return 0x4E71; // NOP
204 if (effect_start5 && (address >= 0x80653E && address <= 0x806543)) //Collision detection!
206 return 0x4E71; // NOP
208 if (effect_start6 && (address >= 0x806544 && address <= 0x806547))
210 return 0x4E71; // NOP
213 //WriteLog("[RM16] Addr: %08X\n", address);
214 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
215 // for(int i=0; i<10000; i++)
216 WriteLog("[M68K] In routine #6!\n");//*/
217 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
218 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
219 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
221 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
222 gpu_dump_registers();
223 gpu_dump_disassembly();
224 // for(int i=0; i<10000; i++)
225 // WriteLog("[M68K] About to run GPU!\n");
227 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
228 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
230 if (address == 0x000066A0)
232 gpu_dump_registers();
233 gpu_dump_disassembly();
235 for(int i=0; i<10000; i++)
236 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
238 unsigned int retVal = 0;
240 if ((address >= 0x000000) && (address <= 0x3FFFFE))
241 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
242 else if ((address >= 0x800000) && (address <= 0xDFFFFE))
243 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
244 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
245 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
246 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
247 retVal = CDROMReadWord(address, M68K);
248 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
249 retVal = TOMReadWord(address, M68K);
250 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
251 retVal = JERRYReadWord(address, M68K);
253 retVal = jaguar_unknown_readword(address, M68K);
258 unsigned int m68k_read_memory_32(unsigned int address)
260 //WriteLog("--> [RM32]\n");
261 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
264 void m68k_write_memory_8(unsigned int address, unsigned int value)
266 #ifdef CPU_DEBUG_MEMORY
267 if ((address >= 0x000000) && (address <= 0x3FFFFF))
271 if (value > writeMemMax[address])
272 writeMemMax[address] = value;
273 if (value < writeMemMin[address])
274 writeMemMin[address] = value;
278 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
279 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
280 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
281 if ((address >= 0x000000) && (address <= 0x3FFFFF))
282 jaguar_mainRam[address] = value;
283 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
284 CDROMWriteByte(address, value, M68K);
285 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
286 TOMWriteByte(address, value, M68K);
287 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
288 JERRYWriteByte(address, value, M68K);
290 jaguar_unknown_writebyte(address, value, M68K);
293 void m68k_write_memory_16(unsigned int address, unsigned int value)
295 #ifdef CPU_DEBUG_MEMORY
296 if ((address >= 0x000000) && (address <= 0x3FFFFE))
300 uint8 hi = value >> 8, lo = value & 0xFF;
302 if (hi > writeMemMax[address])
303 writeMemMax[address] = hi;
304 if (hi < writeMemMin[address])
305 writeMemMin[address] = hi;
307 if (lo > writeMemMax[address+1])
308 writeMemMax[address+1] = lo;
309 if (lo < writeMemMin[address+1])
310 writeMemMin[address+1] = lo;
314 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
315 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
316 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
317 //if (address >= 0xF02200 && address <= 0xF0229F)
318 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
319 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
320 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
321 /*extern uint32 totalFrames;
322 if (address == 0xF02114)
323 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
324 if (address == 0xF02110)
325 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
326 //if (address >= 0xF03B00 && address <= 0xF03DFF)
327 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
329 if ((address >= 0x000000) && (address <= 0x3FFFFE))
331 /* jaguar_mainRam[address] = value >> 8;
332 jaguar_mainRam[address + 1] = value & 0xFF;*/
333 SET16(jaguar_mainRam, address, value);
335 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
336 CDROMWriteWord(address, value, M68K);
337 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
338 TOMWriteWord(address, value, M68K);
339 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
340 JERRYWriteWord(address, value, M68K);
342 jaguar_unknown_writeword(address, value, M68K);
345 void m68k_write_memory_32(unsigned int address, unsigned int value)
347 //WriteLog("--> [WM32]\n");
348 m68k_write_memory_16(address, value >> 16);
349 m68k_write_memory_16(address + 2, value & 0xFFFF);
353 uint32 jaguar_get_handler(uint32 i)
355 return JaguarReadLong(i * 4);
358 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
360 uint32 handler = jaguar_get_handler(i);
361 if (handler && (handler != 0xFFFFFFFF))
367 void M68K_show_context(void)
369 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
370 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
371 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
373 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
374 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
376 WriteLog("68K disasm\n");
377 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
378 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
379 // jaguar_dasm(0x5000, 0x14414);
381 WriteLog("..................\n");
383 if (tom_irq_enabled(IRQ_VBLANK))
385 WriteLog("vblank int: enabled\n");
386 jaguar_dasm(jaguar_get_handler(64), 0x200);
389 WriteLog("vblank int: disabled\n");
391 WriteLog("..................\n");
393 for(int i=0; i<256; i++)
394 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
398 // Unknown read/write byte/word routines
401 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
403 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
404 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));
405 extern bool finished;
407 extern bool doDSPDis;
413 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
415 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
416 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));
417 extern bool finished;
419 extern bool doDSPDis;
425 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
427 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
428 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
429 extern bool finished;
431 extern bool doDSPDis;
438 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
440 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
441 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
442 extern bool finished;
444 extern bool doDSPDis;
452 // Disassemble M68K instructions at the given offset
455 unsigned int m68k_read_disassembler_8(unsigned int address)
457 return m68k_read_memory_8(address);
460 unsigned int m68k_read_disassembler_16(unsigned int address)
462 return m68k_read_memory_16(address);
465 unsigned int m68k_read_disassembler_32(unsigned int address)
467 return m68k_read_memory_32(address);
470 void jaguar_dasm(uint32 offset, uint32 qt)
473 static char buffer[2048];//, mem[64];
474 int pc = offset, oldpc;
476 for(uint32 i=0; i<qt; i++)
479 for(int j=0; j<64; j++)
480 mem[j^0x01] = jaguar_byte_read(pc + j);
482 pc += Dasm68000((char *)mem, buffer, 0);
483 WriteLog("%08X: %s\n", oldpc, buffer);//*/
485 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
486 WriteLog("%08X: %s\n", oldpc, buffer);//*/
491 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
496 if (offset < 0x400000)
497 data = jaguar_mainRam[offset & 0x3FFFFF];
498 else if ((offset >= 0x800000) && (offset < 0xC00000))
499 data = jaguar_mainRom[offset - 0x800000];
500 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
501 data = CDROMReadByte(offset, who);
502 else if ((offset >= 0xE00000) && (offset < 0xE40000))
503 data = jaguar_bootRom[offset & 0x3FFFF];
504 else if ((offset >= 0xF00000) && (offset < 0xF10000))
505 data = TOMReadByte(offset, who);
506 else if ((offset >= 0xF10000) && (offset < 0xF20000))
507 data = JERRYReadByte(offset, who);
509 data = jaguar_unknown_readbyte(offset, who);
514 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
517 if (offset <= 0x3FFFFE)
519 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
521 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
524 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
526 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
527 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
528 return CDROMReadWord(offset, who);
529 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
530 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
531 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
532 return TOMReadWord(offset, who);
533 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
534 return JERRYReadWord(offset, who);
536 return jaguar_unknown_readword(offset, who);
539 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
542 if (offset < 0x400000)
544 jaguar_mainRam[offset & 0x3FFFFF] = data;
547 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
549 CDROMWriteByte(offset, data, who);
552 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
554 TOMWriteByte(offset, data, who);
557 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
559 JERRYWriteByte(offset, data, who);
563 jaguar_unknown_writebyte(offset, data, who);
566 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
568 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
569 //if (offset >= 0xF0B000 && offset <= 0xF0BFFF)
570 //WriteLog("[JWW16] --> Possible GPU RAM mirror access! [%08X]", offset);
571 //if ((offset >= 0x1FF020 && offset <= 0x1FF03F) || (offset >= 0x1FF820 && offset <= 0x1FF83F))
572 // WriteLog("JagWW: Writing %04X at %08X\n", data, offset);
575 if (offset <= 0x3FFFFE)
577 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
578 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
581 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
583 CDROMWriteWord(offset, data, who);
586 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
588 TOMWriteWord(offset, data, who);
591 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
593 JERRYWriteWord(offset, data, who);
597 jaguar_unknown_writeword(offset, data, who);
600 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
601 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
603 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
606 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
607 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
609 JaguarWriteWord(offset, data >> 16, who);
610 JaguarWriteWord(offset+2, data & 0xFFFF, who);
614 // Jaguar console initialization
616 void jaguar_init(void)
618 #ifdef CPU_DEBUG_MEMORY
619 memset(readMem, 0x00, 0x400000);
620 memset(writeMemMin, 0xFF, 0x400000);
621 memset(writeMemMax, 0x00, 0x400000);
623 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
624 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
625 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
626 memset(jaguar_mainRam, 0x00, 0x400000);
627 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
628 memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
630 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
631 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
632 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
633 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
634 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
635 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
637 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
645 void jaguar_done(void)
647 #ifdef CPU_DEBUG_MEMORY
648 /* WriteLog("\n\nM68000 disassembly at $8D0D44 (collision routine!)...\n");
649 jaguar_dasm(0x8D0D44, 5000);
651 /* WriteLog("\n\nM68000 disassembly at $806300 (look @ $806410)...\n");
652 jaguar_dasm(0x806300, 5000);
655 /* WriteLog("\nJaguar: Memory Usage Stats (return addresses)\n\n");
657 for(uint32 i=0; i<=raPtr; i++)
659 WriteLog("\t%08X\n", returnAddr[i]);
660 WriteLog("M68000 disassembly at $%08X...\n", returnAddr[i] - 16);
661 jaguar_dasm(returnAddr[i] - 16, 16);
666 /* int start = 0, end = 0;
667 bool endTriggered = false, startTriggered = false;
668 for(int i=0; i<0x400000; i++)
670 if (readMem[i] && writeMemMin[i] != 0xFF && writeMemMax != 0x00)
673 startTriggered = true, endTriggered = false, start = i;
675 WriteLog("\t\tMin/Max @ %06X: %u/%u\n", i, writeMemMin[i], writeMemMax[i]);
681 end = i - 1, endTriggered = true, startTriggered = false;
682 WriteLog("\tMemory range accessed: %06X - %06X\n", start, end);
689 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
690 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
691 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
692 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
693 for(int i=-2; i<9; i++)
694 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
696 /* WriteLog("\nM68000 disassembly at $802288...\n");
697 jaguar_dasm(0x802288, 3);
698 WriteLog("\nM68000 disassembly at $802200...\n");
699 jaguar_dasm(0x802200, 500);
700 WriteLog("\nM68000 disassembly at $802518...\n");
701 jaguar_dasm(0x802518, 100);//*/
703 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
704 jaguar_dasm(0x803F00, 500);
707 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
708 jaguar_dasm(0x802B00, 500);
711 /* WriteLog("\n\nM68000 disassembly at $8099F8...\n");
712 jaguar_dasm(0x809900, 500);
716 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
717 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
718 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
729 memory_free(jaguar_mainRom);
730 memory_free(jaguar_bootRom);
731 memory_free(jaguar_mainRam);
734 void jaguar_reset(void)
737 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
740 SET32(jaguar_mainRam, 4, 0x00802000);
741 // Handle PD stuff...
742 // This should definitely go elsewhere (like in the cart load section)!
743 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
745 uint32 runAddress = GET32(jaguar_mainRom, 0x2A);
746 uint32 progLength = GET32(jaguar_mainRom, 0x02);
747 WriteLog("Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
748 memcpy(jaguar_mainRam + runAddress, jaguar_mainRom + 0x2E, progLength);
749 SET32(jaguar_mainRam, 4, runAddress);
753 // WriteLog("jaguar_reset():\n");
754 //#ifdef SOUND_OUTPUT
763 m68k_pulse_reset(); // Reset the 68000
764 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
768 // Main Jaguar execution loop (1 frame)
770 void JaguarExecute(int16 * backbuffer, bool render)
772 uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
773 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
774 uint16 vdb = TOMReadWord(0xF00046);
775 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
776 // uint16 vbb = TOMReadWord(0xF00040);
777 //It seems that they mean it when they say that VDE is the end of object processing.
778 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
779 //buffer and not to write any more pixels... !!! FIX !!!
780 uint16 vde = TOMReadWord(0xF00048);
782 uint16 refreshRate = (hardwareTypeNTSC ? 60 : 50);
783 // Should these be hardwired or read from VP? Yes, from VP!
784 uint32 M68KCyclesPerScanline
785 = (hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
786 uint32 RISCCyclesPerScanline
787 = (hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (vp * refreshRate);
789 /*extern int effect_start;
792 WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
795 for(uint16 i=0; i<vp; i++)
797 // Increment the horizontal count (why? RNG?)
798 TOMWriteWord(0xF00004, (TOMReadWord(0xF00004) + 1) & 0x7FF);
800 TOMWriteWord(0xF00006, i); // Write the VC
802 if (i == vi) // Time for Vertical Interrupt?
804 if (tom_irq_enabled(IRQ_VBLANK))// && jaguar_interrupt_handler_is_valid(64))
806 // We don't have to worry about autovectors & whatnot because the Jaguar
807 // tells you through its HW registers who sent the interrupt...
808 tom_set_pending_video_int();
813 // uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
814 // if (invalid_instruction_address != 0x80000000)
815 // cd_bios_process(invalid_instruction_address);
816 m68k_execute(M68KCyclesPerScanline);
817 // No CD handling... !!! FIX !!!
818 cd_bios_exec(i); // NOTE: Ignores parameter...
819 tom_pit_exec(RISCCyclesPerScanline);
820 jerry_pit_exec(RISCCyclesPerScanline);
821 jerry_i2s_exec(RISCCyclesPerScanline);
822 gpu_exec(RISCCyclesPerScanline);
824 DSPExec(RISCCyclesPerScanline);
826 //Interlacing is still not handled correctly here... !!! FIX !!!
827 if (i >= vdb && i < vde)//vbb)
829 if (!(i & 0x01)) // Execute OP only on even lines (non-interlaced only!)
831 tom_exec_scanline(backbuffer, i/2, render); // i/2 is a kludge...
832 backbuffer += TOMGetSDLScreenPitch() / 2; // Convert bytes to words...
838 // Temp debugging stuff
840 void DumpMainMemory(void)
842 FILE * fp = fopen("./memdump.bin", "wb");
847 fwrite(jaguar_mainRam, 1, 0x400000, fp);
851 uint8 * GetRamPtr(void)
853 return jaguar_mainRam;