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
18 // Private function prototypes
20 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who = UNKNOWN);
21 unsigned jaguar_unknown_readword(unsigned address, uint32 who = UNKNOWN);
22 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who = UNKNOWN);
23 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who = UNKNOWN);
24 void M68K_show_context(void);
28 extern bool hardwareTypeNTSC; // Set to false for PAL
30 // Memory debugging identifiers
33 { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
35 // These values are overridden by command line switches...
37 bool dsp_enabled = false;
38 bool jaguar_use_bios = true; // Default is now to USE the BIOS
39 uint32 jaguar_active_memory_dumps = 0;
41 uint32 jaguar_mainRom_crc32;
43 static uint32 m68k_cycles_per_scanline;
44 static uint32 gpu_cycles_per_scanline;
45 static uint32 dsp_cycles_per_scanline;
46 static uint32 jaguar_screen_scanlines;
48 /*static*/ uint8 * jaguar_mainRam = NULL;
49 /*static*/ uint8 * jaguar_bootRom = NULL;
50 /*static*/ uint8 * jaguar_mainRom = NULL;
54 // Callback function to detect illegal instructions
56 void M68KInstructionHook(void)
58 uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
60 /* static char buffer[2048];
61 m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000);
62 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));//*/
64 /* if (m68kPC == 0x803F16)
66 WriteLog("M68K: Registers found at $803F16:\n");
67 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
68 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
69 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
71 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
72 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
75 if (!m68k_is_valid_instruction(JaguarReadWord(m68kPC), M68K_CPU_TYPE_68000))
77 WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC);
78 uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
79 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
80 for(int i=0; i<10; i++)
81 WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
82 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
90 // Musashi 68000 read/write/IRQ functions
93 int irq_ack_handler(int level)
95 int vector = M68K_INT_ACK_AUTOVECTOR;
97 // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK...
101 m68k_set_irq(0); // Clear the IRQ...
102 vector = 64; // Set user interrupt #0
108 unsigned int m68k_read_memory_8(unsigned int address)
110 //WriteLog("[RM8] Addr: %08X\n", address);
111 unsigned int retVal = 0;
113 if ((address >= 0x000000) && (address <= 0x3FFFFF))
114 retVal = jaguar_mainRam[address];
115 else if ((address >= 0x800000) && (address <= 0xDFFFFF))
116 retVal = jaguar_mainRom[address - 0x800000];
117 else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
118 retVal = jaguar_bootRom[address - 0xE00000];
119 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
120 retVal = CDROMReadByte(address);
121 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
122 retVal = TOMReadByte(address, M68K);
123 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
124 retVal = JERRYReadByte(address, M68K);
126 retVal = jaguar_unknown_readbyte(address, M68K);
131 void gpu_dump_disassembly(void);
132 void gpu_dump_registers(void);
134 unsigned int m68k_read_memory_16(unsigned int address)
136 //WriteLog("[RM16] Addr: %08X\n", address);
137 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005FBA)
138 // for(int i=0; i<10000; i++)
139 WriteLog("[M68K] In routine #6!\n");//*/
140 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00006696) // GPU Program #4
141 //if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005B3C) // GPU Program #2
142 /*if (m68k_get_reg(NULL, M68K_REG_PC) == 0x00005BA8) // GPU Program #3
144 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
145 gpu_dump_registers();
146 gpu_dump_disassembly();
147 // for(int i=0; i<10000; i++)
148 // WriteLog("[M68K] About to run GPU!\n");
150 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
151 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x00006696 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x000066A8)
153 if (address == 0x000066A0)
155 gpu_dump_registers();
156 gpu_dump_disassembly();
158 for(int i=0; i<10000; i++)
159 WriteLog("[M68K] About to run GPU! (Addr:%08X, data:%04X)\n", address, TOMReadWord(address));
161 unsigned int retVal = 0;
163 if ((address >= 0x000000) && (address <= 0x3FFFFE))
164 retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
165 else if ((address >= 0x800000) && (address <= 0xDFFFFE))
166 retVal = (jaguar_mainRom[address - 0x800000] << 8) | jaguar_mainRom[address - 0x800000 + 1];
167 else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
168 retVal = (jaguar_bootRom[address - 0xE00000] << 8) | jaguar_bootRom[address - 0xE00000 + 1];
169 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
170 retVal = CDROMReadWord(address, M68K);
171 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
172 retVal = TOMReadWord(address, M68K);
173 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
174 retVal = JERRYReadWord(address, M68K);
176 retVal = jaguar_unknown_readword(address, M68K);
181 unsigned int m68k_read_memory_32(unsigned int address)
183 //WriteLog("--> [RM32]\n");
184 return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
187 void m68k_write_memory_8(unsigned int address, unsigned int value)
189 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
190 // WriteLog("M68K: Writing %02X at %08X\n", value, address);
191 //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
192 if ((address >= 0x000000) && (address <= 0x3FFFFF))
193 jaguar_mainRam[address] = value;
194 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
195 CDROMWriteByte(address, value, M68K);
196 else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
197 TOMWriteByte(address, value, M68K);
198 else if ((address >= 0xF10000) && (address <= 0xF1FFFF))
199 JERRYWriteByte(address, value, M68K);
201 jaguar_unknown_writebyte(address, value, M68K);
204 void m68k_write_memory_16(unsigned int address, unsigned int value)
206 //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F))
207 // WriteLog("M68K: Writing %04X at %08X\n", value, address);
208 //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);
209 //if (address >= 0xF02200 && address <= 0xF0229F)
210 // WriteLog("M68K: Writing to blitter --> %04X at %08X\n", value, address);
211 //if (address >= 0x0E75D0 && address <= 0x0E75E7)
212 // WriteLog("M68K: Writing %04X at %08X, M68K PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));
213 /*extern uint32 totalFrames;
214 extern bool suppressOutput;
215 if (totalFrames >= 59)
216 suppressOutput = false;//*/
217 /*if (address == 0xF02114)
218 WriteLog("M68K: Writing to GPU_CTRL (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));
219 if (address == 0xF02110)
220 WriteLog("M68K: Writing to GPU_PC (frame:%u)... [M68K PC:%08X]\n", totalFrames, m68k_get_reg(NULL, M68K_REG_PC));//*/
221 //if (address >= 0xF03B00 && address <= 0xF03DFF)
222 // WriteLog("M68K: Writing %04X to %08X...\n", value, address);
224 if ((address >= 0x000000) && (address <= 0x3FFFFE))
226 /* jaguar_mainRam[address] = value >> 8;
227 jaguar_mainRam[address + 1] = value & 0xFF;*/
228 SET16(jaguar_mainRam, address, value);
230 else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
231 CDROMWriteWord(address, value, M68K);
232 else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
233 TOMWriteWord(address, value, M68K);
234 else if ((address >= 0xF10000) && (address <= 0xF1FFFE))
235 JERRYWriteWord(address, value, M68K);
237 jaguar_unknown_writeword(address, value, M68K);
240 void m68k_write_memory_32(unsigned int address, unsigned int value)
242 //WriteLog("--> [WM32]\n");
243 m68k_write_memory_16(address, value >> 16);
244 m68k_write_memory_16(address + 2, value & 0xFFFF);
248 uint32 jaguar_get_handler(uint32 i)
250 return JaguarReadLong(i * 4);
253 uint32 jaguar_interrupt_handler_is_valid(uint32 i)
255 uint32 handler = jaguar_get_handler(i);
256 if (handler && (handler != 0xFFFFFFFF))
262 void M68K_show_context(void)
264 WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC));
265 for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++)
266 WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i));
268 for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
269 WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
271 WriteLog("68K disasm\n");
272 // jaguar_dasm(s68000readPC()-0x1000,0x20000);
273 jaguar_dasm(m68k_get_reg(NULL, M68K_REG_PC) - 0x80, 0x200);
274 // jaguar_dasm(0x5000, 0x14414);
276 WriteLog("..................\n");
278 if (tom_irq_enabled(IRQ_VBLANK))
280 WriteLog("vblank int: enabled\n");
281 jaguar_dasm(jaguar_get_handler(64), 0x200);
284 WriteLog("vblank int: disabled\n");
286 WriteLog("..................\n");
288 for(int i=0; i<256; i++)
289 WriteLog("handler %03i at $%08X\n", i, (unsigned int)jaguar_get_handler(i));
293 // Unknown read/write byte/word routines
296 void jaguar_unknown_writebyte(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
298 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
299 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));
300 extern bool finished;
302 extern bool doDSPDis;
308 void jaguar_unknown_writeword(unsigned address, unsigned data, uint32 who/*=UNKNOWN*/)
310 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
311 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));
312 extern bool finished;
314 extern bool doDSPDis;
320 unsigned jaguar_unknown_readbyte(unsigned address, uint32 who/*=UNKNOWN*/)
322 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
323 WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
324 extern bool finished;
326 extern bool doDSPDis;
333 unsigned jaguar_unknown_readword(unsigned address, uint32 who/*=UNKNOWN*/)
335 #ifdef LOG_UNMAPPED_MEMORY_ACCESSES
336 WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
337 extern bool finished;
339 extern bool doDSPDis;
347 // Disassemble M68K instructions at the given offset
350 unsigned int m68k_read_disassembler_8(unsigned int address)
352 return m68k_read_memory_8(address);
355 unsigned int m68k_read_disassembler_16(unsigned int address)
357 return m68k_read_memory_16(address);
360 unsigned int m68k_read_disassembler_32(unsigned int address)
362 return m68k_read_memory_32(address);
365 void jaguar_dasm(uint32 offset, uint32 qt)
368 static char buffer[2048];//, mem[64];
369 int pc = offset, oldpc;
371 for(uint32 i=0; i<qt; i++)
374 for(int j=0; j<64; j++)
375 mem[j^0x01] = jaguar_byte_read(pc + j);
377 pc += Dasm68000((char *)mem, buffer, 0);
378 WriteLog("%08X: %s\n", oldpc, buffer);//*/
380 pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000);
381 WriteLog("%08X: %s\n", oldpc, buffer);//*/
386 uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
391 if (offset < 0x400000)
392 data = jaguar_mainRam[offset & 0x3FFFFF];
393 else if ((offset >= 0x800000) && (offset < 0xC00000))
394 data = jaguar_mainRom[offset - 0x800000];
395 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
396 data = CDROMReadByte(offset, who);
397 else if ((offset >= 0xE00000) && (offset < 0xE40000))
398 data = jaguar_bootRom[offset & 0x3FFFF];
399 else if ((offset >= 0xF00000) && (offset < 0xF10000))
400 data = TOMReadByte(offset, who);
401 else if ((offset >= 0xF10000) && (offset < 0xF20000))
402 data = JERRYReadByte(offset, who);
404 data = jaguar_unknown_readbyte(offset, who);
409 uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
412 if (offset <= 0x3FFFFE)
414 return (jaguar_mainRam[(offset+0) & 0x3FFFFF] << 8) | jaguar_mainRam[(offset+1) & 0x3FFFFF];
416 else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
419 return (jaguar_mainRom[offset+0] << 8) | jaguar_mainRom[offset+1];
421 // else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
422 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
423 return CDROMReadWord(offset, who);
424 else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
425 return (jaguar_bootRom[(offset+0) & 0x3FFFF] << 8) | jaguar_bootRom[(offset+1) & 0x3FFFF];
426 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
427 return TOMReadWord(offset, who);
428 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
429 return JERRYReadWord(offset, who);
431 return jaguar_unknown_readword(offset, who);
434 void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
437 if (offset < 0x400000)
439 jaguar_mainRam[offset & 0x3FFFFF] = data;
442 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
444 CDROMWriteByte(offset, data, who);
447 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFF))
449 TOMWriteByte(offset, data, who);
452 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFF))
454 JERRYWriteByte(offset, data, who);
458 jaguar_unknown_writebyte(offset, data, who);
461 void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
463 //TEMP--Mirror of F03000? Yes, but only 32-bit CPUs can do it (i.e., NOT the 68K!)
464 //if (offset >= 0xF0B000 && offset <= 0xF0BFFF)
465 //WriteLog("[JWW16] --> Possible GPU RAM mirror access! [%08X]", offset);
466 //if ((offset >= 0x1FF020 && offset <= 0x1FF03F) || (offset >= 0x1FF820 && offset <= 0x1FF83F))
467 // WriteLog("JagWW: Writing %04X at %08X\n", data, offset);
470 if (offset <= 0x3FFFFE)
472 jaguar_mainRam[(offset+0) & 0x3FFFFF] = (data>>8) & 0xFF;
473 jaguar_mainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
476 else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
478 CDROMWriteWord(offset, data, who);
481 else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
483 TOMWriteWord(offset, data, who);
486 else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
488 JERRYWriteWord(offset, data, who);
492 jaguar_unknown_writeword(offset, data, who);
495 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
496 uint32 JaguarReadLong(uint32 offset, uint32 who/*=UNKNOWN*/)
498 return (JaguarReadWord(offset, who) << 16) | JaguarReadWord(offset+2, who);
501 // We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
502 void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
504 JaguarWriteWord(offset, data >> 16, who);
505 JaguarWriteWord(offset+2, data & 0xFFFF, who);
509 // Jaguar console initialization
511 void jaguar_init(void)
513 memory_malloc_secure((void **)&jaguar_mainRam, 0x400000, "Jaguar 68K CPU RAM");
514 memory_malloc_secure((void **)&jaguar_bootRom, 0x040000, "Jaguar 68K CPU BIOS ROM");
515 memory_malloc_secure((void **)&jaguar_mainRom, 0x600000, "Jaguar 68K CPU ROM");
516 memset(jaguar_mainRam, 0x00, 0x400000);
517 // memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
518 memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
520 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Brain Dead 13.cdi");
521 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\baldies.cdi");
522 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\mystdemo.cdi");
523 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\battlemorph.cdi");
524 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\primalrage.cdi");
525 // cd_bios_boot("C:\\ftp\\jaguar\\cd\\Dragons Lair.cdi");
527 // Should these be hardwired or read from VP?
528 jaguar_screen_scanlines = (hardwareTypeNTSC ? 524 : 624);
529 //Should the divisor be 50 for PAL??? Let's try it!
530 m68k_cycles_per_scanline = (hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (jaguar_screen_scanlines * (hardwareTypeNTSC ? 60 : 50));
531 gpu_cycles_per_scanline = dsp_cycles_per_scanline
532 = (hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL) / (jaguar_screen_scanlines * (hardwareTypeNTSC ? 60 : 50));
534 //#ifdef SOUND_OUTPUT
538 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
546 void jaguar_done(void)
549 // for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++)
550 // WriteLog("\tA%i = 0x%.8x\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i));
551 int32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
552 WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
553 for(int i=-2; i<9; i++)
554 WriteLog("%06X: %08X\n", topOfStack + (i * 4), JaguarReadLong(topOfStack + (i * 4)));
556 /* WriteLog("\nM68000 disassembly at $802288...\n");
557 jaguar_dasm(0x802288, 3);
558 WriteLog("\nM68000 disassembly at $802200...\n");
559 jaguar_dasm(0x802200, 500);
560 WriteLog("\nM68000 disassembly at $802518...\n");
561 jaguar_dasm(0x802518, 100);//*/
563 /* WriteLog("\n\nM68000 disassembly at $803F00 (look @ $803F2A)...\n");
564 jaguar_dasm(0x803F00, 500);
567 /* WriteLog("\n\nM68000 disassembly at $802B00 (look @ $802B5E)...\n");
568 jaguar_dasm(0x802B00, 500);
571 // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004));
572 WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F);
573 WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
576 //#ifdef SOUND_OUTPUT
586 memory_free(jaguar_mainRom);
587 memory_free(jaguar_bootRom);
588 memory_free(jaguar_mainRam);
591 void jaguar_reset(void)
594 memcpy(jaguar_mainRam, jaguar_bootRom, 8);
597 SET32(jaguar_mainRam, 4, 0x00802000);
598 // Handle PD stuff...
599 // This should definitely go elsewhere (like in the cart load section)!
600 if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
602 uint32 runAddress = GET32(jaguar_mainRom, 0x2A);
603 uint32 progLength = GET32(jaguar_mainRom, 0x02);
604 WriteLog("Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
605 memcpy(jaguar_mainRam + runAddress, jaguar_mainRom + 0x2E, progLength);
606 SET32(jaguar_mainRam, 4, runAddress);
610 // WriteLog("jaguar_reset():\n");
611 //#ifdef SOUND_OUTPUT
620 m68k_pulse_reset(); // Reset the 68000
621 WriteLog("\t68K PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
624 void jaguar_reset_handler(void)
628 void jaguar_exec(int16 * backbuffer, bool render)
630 uint32 i, vblank_duration = tom_get_vdb();
633 if (tom_irq_enabled(IRQ_VBLANK) && jaguar_interrupt_handler_is_valid(64))
635 if (JaguarReadWord(0xF0004E) != 0x07FF) // VI (11 bits wide!)
637 tom_set_pending_video_int();
638 // s68000interrupt(7, IRQ_VBLANK+64);
639 // s68000flushInterrupts();
640 m68k_set_irq(7); // IRQ_VBLANK+64??? Not autovectored??? No.
641 // Could set a global variable here, to signal that this is a VBLANK interrupt...
642 // Then again, since IRQ_VBLANK is set to zero, this would not be necessary in this case.
646 for(i=0; i<vblank_duration; i++)
648 /* uint32 invalid_instruction_address = s68000exec(m68k_cycles_per_scanline);
649 if (invalid_instruction_address != 0x80000000)
650 cd_bios_process(invalid_instruction_address);*/
651 m68k_execute(m68k_cycles_per_scanline);
652 // No CD handling... !!! FIX !!!
655 tom_pit_exec(m68k_cycles_per_scanline);
656 tom_exec_scanline(backbuffer, i, false);
657 jerry_pit_exec(m68k_cycles_per_scanline);
658 jerry_i2s_exec(m68k_cycles_per_scanline);
659 gpu_exec(gpu_cycles_per_scanline);
661 DSPExec(dsp_cycles_per_scanline);
664 for (; i<jaguar_screen_scanlines; i++)
666 /* uint32 invalid_instruction_address = s68000exec(m68k_cycles_per_scanline);
667 if (invalid_instruction_address != 0x80000000)
668 cd_bios_process(invalid_instruction_address);*/
669 m68k_execute(m68k_cycles_per_scanline);
670 // No CD handling... !!! FIX !!!
672 tom_pit_exec(m68k_cycles_per_scanline);
673 jerry_pit_exec(m68k_cycles_per_scanline);
674 jerry_i2s_exec(m68k_cycles_per_scanline);
675 tom_exec_scanline(backbuffer, i, render);
676 gpu_exec(gpu_cycles_per_scanline);
678 DSPExec(dsp_cycles_per_scanline);
679 backbuffer += tom_width;
681 //#ifdef SOUND_OUTPUT
682 // system_sound_update();
687 // Main Jaguar execution loop (1 frame)
689 void JaguarExecute(int16 * backbuffer, bool render)
691 uint16 vp = TOMReadWord(0xF0003E);//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
692 uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
693 uint16 vdb = TOMReadWord(0xF00046);
694 // uint16 endingLine =
695 //Note: This is the *definite* end of the display, though VDE *might* be less than this...
696 // uint16 vbb = TOMReadWord(0xF00040);
697 //It seems that they mean it when they say that VDE is the end of object processing.
698 //However, we need to be able to tell the OP (or TOM) that we've reached the end of the
699 //buffer and not to write any more pixels... !!! FIX !!!
700 uint16 vde = TOMReadWord(0xF00048);
702 /*extern int effect_start;
705 WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, m68k_cycles_per_scanline, gpu_cycles_per_scanline);
708 for(uint16 i=0; i<vp; i++)
710 // Increment the horizontal count (why? RNG?)
711 TOMWriteWord(0xF00004, TOMReadWord(0xF00004) + 1);
713 TOMWriteWord(0xF00006, i); // Write the VC
715 if (i == vi) // Time for Vertical Interrupt?
717 if (tom_irq_enabled(IRQ_VBLANK) && jaguar_interrupt_handler_is_valid(64))
719 // We don't have to worry about autovectors & whatnot because the Jaguar
720 // tells you through registers who sent the interrupt...
721 tom_set_pending_video_int();
726 // uint32 invalid_instruction_address = s68000exec(m68k_cycles_per_scanline);
727 // if (invalid_instruction_address != 0x80000000)
728 // cd_bios_process(invalid_instruction_address);
729 // These are divided by 2 because we're executing *half* lines...!
730 m68k_execute(m68k_cycles_per_scanline / 2);
731 // No CD handling... !!! FIX !!!
732 cd_bios_exec(i); // NOTE: Ignores parameter...
733 //I'm pretty sure these run at the RISC clock rate...
734 // tom_pit_exec(m68k_cycles_per_scanline / 2);
735 // jerry_pit_exec(m68k_cycles_per_scanline / 2);
736 // jerry_i2s_exec(m68k_cycles_per_scanline / 2);
737 tom_pit_exec(gpu_cycles_per_scanline / 2);
738 jerry_pit_exec(gpu_cycles_per_scanline / 2);
739 jerry_i2s_exec(gpu_cycles_per_scanline / 2);
740 gpu_exec(gpu_cycles_per_scanline / 2);
742 DSPExec(dsp_cycles_per_scanline / 2);
744 //Interlacing is still not handled correctly here...
745 if (i >= vdb && i < vde)//vbb)
747 if (!(i & 0x01)) // Execute OP only on even lines (non-interlaced only!)
749 tom_exec_scanline(backbuffer, i/2, render); // i/2 is a kludge...
750 backbuffer += TOMGetSDLScreenPitch() / 2; // Convert bytes to words...
755 //#ifdef SOUND_OUTPUT
756 // system_sound_update();
760 // Temp debugging stuff
762 void DumpMainMemory(void)
764 FILE * fp = fopen("./memdump.bin", "wb");
769 fwrite(jaguar_mainRam, 1, 0x400000, fp);
773 uint8 * GetRamPtr(void)
775 return jaguar_mainRam;