| 1 | // This is part of Pico Library\r |
| 2 | \r |
| 3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
| 4 | // (c) Copyright 2006 notaz, All rights reserved.\r |
| 5 | // Free for non-commercial use.\r |
| 6 | \r |
| 7 | // For commercial use, separate licencing terms must be obtained.\r |
| 8 | \r |
| 9 | \r |
| 10 | //#define __debug_io\r |
| 11 | \r |
| 12 | #include "PicoInt.h"\r |
| 13 | \r |
| 14 | #include "sound/sound.h"\r |
| 15 | #include "sound/ym2612.h"\r |
| 16 | #include "sound/sn76496.h"\r |
| 17 | \r |
| 18 | typedef unsigned char u8;\r |
| 19 | typedef unsigned short u16;\r |
| 20 | typedef unsigned int u32;\r |
| 21 | \r |
| 22 | extern unsigned int lastSSRamWrite; // used by serial SRAM code\r |
| 23 | \r |
| 24 | #ifdef _ASM_MEMORY_C\r |
| 25 | u8 PicoRead8(u32 a);\r |
| 26 | u16 PicoRead16(u32 a);\r |
| 27 | void PicoWriteRomHW_SSF2(u32 a,u32 d);\r |
| 28 | void PicoWriteRomHW_in1 (u32 a,u32 d);\r |
| 29 | #endif\r |
| 30 | \r |
| 31 | \r |
| 32 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 33 | // cyclone debug mode\r |
| 34 | u32 lastread_a, lastread_d[16]={0,}, lastwrite_cyc_d[16]={0,}, lastwrite_mus_d[16]={0,};\r |
| 35 | int lrp_cyc=0, lrp_mus=0, lwp_cyc=0, lwp_mus=0;\r |
| 36 | extern unsigned int ppop;\r |
| 37 | #endif\r |
| 38 | \r |
| 39 | #if defined(EMU_C68K) || defined(EMU_A68K)\r |
| 40 | static __inline int PicoMemBase(u32 pc)\r |
| 41 | {\r |
| 42 | int membase=0;\r |
| 43 | \r |
| 44 | if (pc<Pico.romsize+4)\r |
| 45 | {\r |
| 46 | membase=(int)Pico.rom; // Program Counter in Rom\r |
| 47 | }\r |
| 48 | else if ((pc&0xe00000)==0xe00000)\r |
| 49 | {\r |
| 50 | membase=(int)Pico.ram-(pc&0xff0000); // Program Counter in Ram\r |
| 51 | }\r |
| 52 | else\r |
| 53 | {\r |
| 54 | // Error - Program Counter is invalid\r |
| 55 | membase=(int)Pico.rom;\r |
| 56 | }\r |
| 57 | \r |
| 58 | return membase;\r |
| 59 | }\r |
| 60 | #endif\r |
| 61 | \r |
| 62 | \r |
| 63 | #ifdef EMU_A68K\r |
| 64 | extern u8 *OP_ROM=NULL,*OP_RAM=NULL;\r |
| 65 | #endif\r |
| 66 | \r |
| 67 | static u32 CPU_CALL PicoCheckPc(u32 pc)\r |
| 68 | {\r |
| 69 | u32 ret=0;\r |
| 70 | #if defined(EMU_C68K)\r |
| 71 | pc-=PicoCpu.membase; // Get real pc\r |
| 72 | pc&=0xfffffe;\r |
| 73 | if (pc == 0)\r |
| 74 | return (int)Pico.rom + Pico.romsize; // common crash condition, can happen if acc timing is off\r |
| 75 | \r |
| 76 | PicoCpu.membase=PicoMemBase(pc);\r |
| 77 | \r |
| 78 | ret = PicoCpu.membase+pc;\r |
| 79 | #elif defined(EMU_A68K)\r |
| 80 | OP_ROM=(u8 *)PicoMemBase(pc);\r |
| 81 | \r |
| 82 | // don't bother calling us back unless it's outside the 64k segment\r |
| 83 | M68000_regs.AsmBank=(pc>>16);\r |
| 84 | #endif\r |
| 85 | return ret;\r |
| 86 | }\r |
| 87 | \r |
| 88 | \r |
| 89 | int PicoInitPc(u32 pc)\r |
| 90 | {\r |
| 91 | PicoCheckPc(pc);\r |
| 92 | return 0;\r |
| 93 | }\r |
| 94 | \r |
| 95 | #ifndef _ASM_MEMORY_C\r |
| 96 | void PicoMemReset()\r |
| 97 | {\r |
| 98 | }\r |
| 99 | #endif\r |
| 100 | \r |
| 101 | // -----------------------------------------------------------------\r |
| 102 | \r |
| 103 | #ifndef _ASM_MEMORY_C\r |
| 104 | // address must already be checked\r |
| 105 | static int SRAMRead(u32 a)\r |
| 106 | {\r |
| 107 | u8 *d = SRam.data-SRam.start+a;\r |
| 108 | return (d[0]<<8)|d[1];\r |
| 109 | }\r |
| 110 | #endif\r |
| 111 | \r |
| 112 | \r |
| 113 | // for nonstandard reads\r |
| 114 | #ifndef _ASM_MEMORY_C\r |
| 115 | static\r |
| 116 | #endif\r |
| 117 | u32 OtherRead16End(u32 a, int realsize)\r |
| 118 | {\r |
| 119 | u32 d=0;\r |
| 120 | \r |
| 121 | dprintf("strange r%i: %06x @%06x", realsize, a&0xffffff, SekPc);\r |
| 122 | \r |
| 123 | // for games with simple protection devices, discovered by Haze\r |
| 124 | // some dumb detection is used, but that should be enough to make things work\r |
| 125 | if ((a>>22) == 1 && Pico.romsize >= 512*1024) {\r |
| 126 | if (*(int *)(Pico.rom+0x123e4) == 0x00550c39 && *(int *)(Pico.rom+0x123e8) == 0x00000040) { // Super Bubble Bobble (Unl) [!]\r |
| 127 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
| 128 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
| 129 | }\r |
| 130 | else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)\r |
| 131 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
| 132 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
| 133 | else if (a == 0x400004) { d=0xaa<<8; goto end; }\r |
| 134 | else if (a == 0x400006) { d=0xf0<<8; goto end; }\r |
| 135 | }\r |
| 136 | else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]\r |
| 137 | if (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }\r |
| 138 | else if (a == 0x4a8820) { d=0x0a<<8; goto end; }\r |
| 139 | // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case\r |
| 140 | }\r |
| 141 | else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]\r |
| 142 | if (a == 0x400000) { d=0x90<<8; goto end; }\r |
| 143 | else if (a == 0x401000) { d=0xd3<<8; goto end; } // this one doesn't seem to be needed, the code does 2 comparisons and only then\r |
| 144 | // checks the result, which is of the above one. Left it just in case.\r |
| 145 | }\r |
| 146 | else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)\r |
| 147 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
| 148 | else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails\r |
| 149 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
| 150 | else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above\r |
| 151 | }\r |
| 152 | // our default behaviour is to return whatever was last written a 0x400000-0x7fffff range (used by Squirrel King (R) [!])\r |
| 153 | // Lion King II, The (Unl) [!] writes @ 400000 and wants to get that val @ 400002 and wites another val\r |
| 154 | // @ 400004 which is expected @ 400006, so we really remember 2 values here\r |
| 155 | d = Pico.m.prot_bytes[(a>>2)&1]<<8;\r |
| 156 | }\r |
| 157 | else if (a == 0xa13000 && Pico.romsize >= 1024*1024) {\r |
| 158 | if (*(int *)(Pico.rom+0xc8af0) == 0x30133013 && *(int *)(Pico.rom+0xc8af4) == 0x000f0240) { // Rockman X3 (Unl) [!]\r |
| 159 | d=0x0c; goto end;\r |
| 160 | }\r |
| 161 | else if (*(int *)(Pico.rom+0x28888) == 0x07fc0000 && *(int *)(Pico.rom+0x2888c) == 0x4eb94e75) { // Bug's Life, A (Unl) [!]\r |
| 162 | d=0x28; goto end; // does the check from RAM\r |
| 163 | }\r |
| 164 | else if (*(int *)(Pico.rom+0xc8778) == 0x30133013 && *(int *)(Pico.rom+0xc877c) == 0x000f0240) { // Super Mario Bros. (Unl) [!]\r |
| 165 | d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]\r |
| 166 | }\r |
| 167 | else if (*(int *)(Pico.rom+0xf20ec) == 0x30143013 && *(int *)(Pico.rom+0xf20f0) == 0x000f0200) { // Super Mario 2 1998 (Unl) [!]\r |
| 168 | d=0x0a; goto end;\r |
| 169 | }\r |
| 170 | }\r |
| 171 | else if (a == 0xa13002) { // Pocket Monsters (Unl)\r |
| 172 | d=0x01; goto end;\r |
| 173 | }\r |
| 174 | else if (a == 0xa1303E) { // Pocket Monsters (Unl)\r |
| 175 | d=0x1f; goto end;\r |
| 176 | }\r |
| 177 | else if (a == 0x30fe02) {\r |
| 178 | // Virtua Racing - just for fun\r |
| 179 | // this seems to be some flag that SVP is ready or something similar\r |
| 180 | d=1; goto end;\r |
| 181 | }\r |
| 182 | \r |
| 183 | end:\r |
| 184 | dprintf("ret = %04x", d);\r |
| 185 | return d;\r |
| 186 | }\r |
| 187 | \r |
| 188 | \r |
| 189 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
| 190 | \r |
| 191 | static void OtherWrite8End(u32 a,u32 d,int realsize)\r |
| 192 | {\r |
| 193 | // sram\r |
| 194 | //if(a==0x200000) dprintf("cc : %02x @ %06x [%i|%i]", d, SekPc, SekCyclesDoneT(), SekCyclesDone());\r |
| 195 | //if(a==0x200001) dprintf("w8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());\r |
| 196 | if(a >= SRam.start && a <= SRam.end) {\r |
| 197 | dprintf("sram w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
| 198 | unsigned int sreg = Pico.m.sram_reg;\r |
| 199 | if(!(sreg & 0x10)) {\r |
| 200 | // not detected SRAM\r |
| 201 | if((a&~1)==0x200000) {\r |
| 202 | Pico.m.sram_reg|=4; // this should be a game with EEPROM (like NBA Jam)\r |
| 203 | SRam.start=0x200000; SRam.end=SRam.start+1;\r |
| 204 | }\r |
| 205 | Pico.m.sram_reg|=0x10;\r |
| 206 | }\r |
| 207 | if(sreg & 4) { // EEPROM write\r |
| 208 | if(SekCyclesDoneT()-lastSSRamWrite < 46) {\r |
| 209 | // just update pending state\r |
| 210 | SRAMUpdPending(a, d);\r |
| 211 | } else {\r |
| 212 | SRAMWriteEEPROM(sreg>>6); // execute pending\r |
| 213 | SRAMUpdPending(a, d);\r |
| 214 | lastSSRamWrite = SekCyclesDoneT();\r |
| 215 | }\r |
| 216 | } else if(!(sreg & 2)) {\r |
| 217 | u8 *pm=(u8 *)(SRam.data-SRam.start+a);\r |
| 218 | if(*pm != (u8)d) {\r |
| 219 | SRam.changed = 1;\r |
| 220 | *pm=(u8)d;\r |
| 221 | }\r |
| 222 | }\r |
| 223 | return;\r |
| 224 | }\r |
| 225 | \r |
| 226 | #ifdef _ASM_MEMORY_C\r |
| 227 | // special ROM hardware (currently only banking and sram reg supported)\r |
| 228 | if((a&0xfffff1) == 0xA130F1) {\r |
| 229 | PicoWriteRomHW_SSF2(a, d); // SSF2 or SRAM\r |
| 230 | return;\r |
| 231 | }\r |
| 232 | #else\r |
| 233 | // sram access register\r |
| 234 | if(a == 0xA130F1) {\r |
| 235 | dprintf("sram reg=%02x", d);\r |
| 236 | Pico.m.sram_reg &= ~3;\r |
| 237 | Pico.m.sram_reg |= (u8)(d&3);\r |
| 238 | return;\r |
| 239 | }\r |
| 240 | #endif\r |
| 241 | dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
| 242 | \r |
| 243 | if(a >= 0xA13004 && a < 0xA13040) {\r |
| 244 | // dumb 12-in-1 or 4-in-1 banking support\r |
| 245 | int len;\r |
| 246 | a &= 0x3f; a <<= 16;\r |
| 247 | len = Pico.romsize - a;\r |
| 248 | if (len <= 0) return; // invalid/missing bank\r |
| 249 | if (len > 0x200000) len = 0x200000; // 2 megs\r |
| 250 | memcpy(Pico.rom, Pico.rom+a, len); // code which does this is in RAM so this is safe.\r |
| 251 | return;\r |
| 252 | }\r |
| 253 | \r |
| 254 | // for games with simple protection devices, discovered by Haze\r |
| 255 | else if ((a>>22) == 1)\r |
| 256 | Pico.m.prot_bytes[(a>>2)&1] = (u8)d;\r |
| 257 | }\r |
| 258 | \r |
| 259 | \r |
| 260 | #include "MemoryCmn.c"\r |
| 261 | \r |
| 262 | \r |
| 263 | // -----------------------------------------------------------------\r |
| 264 | // Read Rom and read Ram\r |
| 265 | \r |
| 266 | #ifndef _ASM_MEMORY_C\r |
| 267 | u8 CPU_CALL PicoRead8(u32 a)\r |
| 268 | {\r |
| 269 | u32 d=0;\r |
| 270 | \r |
| 271 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram\r |
| 272 | \r |
| 273 | a&=0xffffff;\r |
| 274 | \r |
| 275 | #if !(defined(EMU_C68K) && defined(EMU_M68K))\r |
| 276 | // sram\r |
| 277 | if(a >= SRam.start && a <= SRam.end) {\r |
| 278 | unsigned int sreg = Pico.m.sram_reg;\r |
| 279 | if(!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM\r |
| 280 | Pico.m.sram_reg|=0x10; // should be normal SRAM\r |
| 281 | }\r |
| 282 | if(sreg & 4) { // EEPROM read\r |
| 283 | d = SRAMReadEEPROM();\r |
| 284 | goto end;\r |
| 285 | } else if(sreg & 1) {\r |
| 286 | d = *(u8 *)(SRam.data-SRam.start+a);\r |
| 287 | goto end;\r |
| 288 | }\r |
| 289 | }\r |
| 290 | #endif\r |
| 291 | \r |
| 292 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom\r |
| 293 | if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram\r |
| 294 | \r |
| 295 | d=OtherRead16(a&~1, 8); if ((a&1)==0) d>>=8;\r |
| 296 | \r |
| 297 | end:\r |
| 298 | \r |
| 299 | //if ((a&0xe0ffff)==0xe0AE57+0x69c)\r |
| 300 | // dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
| 301 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
| 302 | // dprintf("r8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
| 303 | \r |
| 304 | //if(a==0x200001) dprintf("r8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());\r |
| 305 | //dprintf("r8 : %06x, %02x @%06x [%03i]", a&0xffffff, (u8)d, SekPc, Pico.m.scanline);\r |
| 306 | #ifdef __debug_io\r |
| 307 | dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
| 308 | #endif\r |
| 309 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 310 | if(a>=Pico.romsize&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b) {\r |
| 311 | lastread_a = a;\r |
| 312 | lastread_d[lrp_cyc++&15] = (u8)d;\r |
| 313 | }\r |
| 314 | #endif\r |
| 315 | return (u8)d;\r |
| 316 | }\r |
| 317 | \r |
| 318 | u16 CPU_CALL PicoRead16(u32 a)\r |
| 319 | {\r |
| 320 | u16 d=0;\r |
| 321 | \r |
| 322 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram\r |
| 323 | \r |
| 324 | a&=0xfffffe;\r |
| 325 | \r |
| 326 | #if !(defined(EMU_C68K) && defined(EMU_M68K))\r |
| 327 | // sram\r |
| 328 | if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg & 1)) {\r |
| 329 | d = (u16) SRAMRead(a);\r |
| 330 | goto end;\r |
| 331 | }\r |
| 332 | #endif\r |
| 333 | \r |
| 334 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom\r |
| 335 | \r |
| 336 | d = (u16)OtherRead16(a, 16);\r |
| 337 | \r |
| 338 | end:\r |
| 339 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
| 340 | // dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
| 341 | \r |
| 342 | #ifdef __debug_io\r |
| 343 | dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
| 344 | #endif\r |
| 345 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 346 | if(a>=Pico.romsize&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b) {\r |
| 347 | lastread_a = a;\r |
| 348 | lastread_d[lrp_cyc++&15] = d;\r |
| 349 | }\r |
| 350 | #endif\r |
| 351 | return d;\r |
| 352 | }\r |
| 353 | \r |
| 354 | u32 CPU_CALL PicoRead32(u32 a)\r |
| 355 | {\r |
| 356 | u32 d=0;\r |
| 357 | \r |
| 358 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram\r |
| 359 | \r |
| 360 | a&=0xfffffe;\r |
| 361 | \r |
| 362 | // sram\r |
| 363 | if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg & 1)) {\r |
| 364 | d = (SRAMRead(a)<<16)|SRAMRead(a+2);\r |
| 365 | goto end;\r |
| 366 | }\r |
| 367 | \r |
| 368 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom\r |
| 369 | \r |
| 370 | d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);\r |
| 371 | \r |
| 372 | end:\r |
| 373 | #ifdef __debug_io\r |
| 374 | dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
| 375 | #endif\r |
| 376 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 377 | if(a>=Pico.romsize&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b) {\r |
| 378 | lastread_a = a;\r |
| 379 | lastread_d[lrp_cyc++&15] = d;\r |
| 380 | }\r |
| 381 | #endif\r |
| 382 | return d;\r |
| 383 | }\r |
| 384 | #endif\r |
| 385 | \r |
| 386 | // -----------------------------------------------------------------\r |
| 387 | // Write Ram\r |
| 388 | \r |
| 389 | static void CPU_CALL PicoWrite8(u32 a,u8 d)\r |
| 390 | {\r |
| 391 | #ifdef __debug_io\r |
| 392 | dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
| 393 | #endif\r |
| 394 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 395 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
| 396 | #endif\r |
| 397 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
| 398 | // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
| 399 | \r |
| 400 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram\r |
| 401 | \r |
| 402 | a&=0xffffff;\r |
| 403 | OtherWrite8(a,d,8);\r |
| 404 | }\r |
| 405 | \r |
| 406 | void CPU_CALL PicoWrite16(u32 a,u16 d)\r |
| 407 | {\r |
| 408 | #ifdef __debug_io\r |
| 409 | dprintf("w16: %06x, %04x", a&0xffffff, d);\r |
| 410 | #endif\r |
| 411 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 412 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
| 413 | #endif\r |
| 414 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
| 415 | // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
| 416 | \r |
| 417 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram\r |
| 418 | \r |
| 419 | a&=0xfffffe;\r |
| 420 | OtherWrite16(a,d);\r |
| 421 | }\r |
| 422 | \r |
| 423 | static void CPU_CALL PicoWrite32(u32 a,u32 d)\r |
| 424 | {\r |
| 425 | #ifdef __debug_io\r |
| 426 | dprintf("w32: %06x, %08x", a&0xffffff, d);\r |
| 427 | #endif\r |
| 428 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 429 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
| 430 | #endif\r |
| 431 | \r |
| 432 | if ((a&0xe00000)==0xe00000)\r |
| 433 | {\r |
| 434 | // Ram:\r |
| 435 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));\r |
| 436 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
| 437 | return;\r |
| 438 | }\r |
| 439 | \r |
| 440 | a&=0xfffffe;\r |
| 441 | OtherWrite16(a, (u16)(d>>16));\r |
| 442 | OtherWrite16(a+2,(u16)d);\r |
| 443 | }\r |
| 444 | \r |
| 445 | \r |
| 446 | // -----------------------------------------------------------------\r |
| 447 | void PicoMemSetup()\r |
| 448 | {\r |
| 449 | #ifdef EMU_C68K\r |
| 450 | // Setup memory callbacks:\r |
| 451 | PicoCpu.checkpc=PicoCheckPc;\r |
| 452 | PicoCpu.fetch8 =PicoCpu.read8 =PicoRead8;\r |
| 453 | PicoCpu.fetch16=PicoCpu.read16=PicoRead16;\r |
| 454 | PicoCpu.fetch32=PicoCpu.read32=PicoRead32;\r |
| 455 | PicoCpu.write8 =PicoWrite8;\r |
| 456 | PicoCpu.write16=PicoWrite16;\r |
| 457 | PicoCpu.write32=PicoWrite32;\r |
| 458 | #endif\r |
| 459 | }\r |
| 460 | \r |
| 461 | #ifdef EMU_A68K\r |
| 462 | struct A68KInter\r |
| 463 | {\r |
| 464 | u32 unknown;\r |
| 465 | u8 (__fastcall *Read8) (u32 a);\r |
| 466 | u16 (__fastcall *Read16)(u32 a);\r |
| 467 | u32 (__fastcall *Read32)(u32 a);\r |
| 468 | void (__fastcall *Write8) (u32 a,u8 d);\r |
| 469 | void (__fastcall *Write16) (u32 a,u16 d);\r |
| 470 | void (__fastcall *Write32) (u32 a,u32 d);\r |
| 471 | void (__fastcall *ChangePc)(u32 a);\r |
| 472 | u8 (__fastcall *PcRel8) (u32 a);\r |
| 473 | u16 (__fastcall *PcRel16)(u32 a);\r |
| 474 | u32 (__fastcall *PcRel32)(u32 a);\r |
| 475 | u16 (__fastcall *Dir16)(u32 a);\r |
| 476 | u32 (__fastcall *Dir32)(u32 a);\r |
| 477 | };\r |
| 478 | \r |
| 479 | struct A68KInter a68k_memory_intf=\r |
| 480 | {\r |
| 481 | 0,\r |
| 482 | PicoRead8,\r |
| 483 | PicoRead16,\r |
| 484 | PicoRead32,\r |
| 485 | PicoWrite8,\r |
| 486 | PicoWrite16,\r |
| 487 | PicoWrite32,\r |
| 488 | PicoCheckPc,\r |
| 489 | PicoRead8,\r |
| 490 | PicoRead16,\r |
| 491 | PicoRead32,\r |
| 492 | PicoRead16, // unused\r |
| 493 | PicoRead32, // unused\r |
| 494 | };\r |
| 495 | #endif\r |
| 496 | \r |
| 497 | #ifdef EMU_M68K\r |
| 498 | unsigned int m68k_read_pcrelative_CD8 (unsigned int a);\r |
| 499 | unsigned int m68k_read_pcrelative_CD16(unsigned int a);\r |
| 500 | unsigned int m68k_read_pcrelative_CD32(unsigned int a);\r |
| 501 | \r |
| 502 | // these are allowed to access RAM\r |
| 503 | unsigned int m68k_read_pcrelative_8 (unsigned int a) {\r |
| 504 | a&=0xffffff;\r |
| 505 | if(PicoMCD&1) return m68k_read_pcrelative_CD8(a);\r |
| 506 | if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom\r |
| 507 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram\r |
| 508 | return 0;//(u8) lastread_d;\r |
| 509 | }\r |
| 510 | unsigned int m68k_read_pcrelative_16(unsigned int a) {\r |
| 511 | a&=0xffffff;\r |
| 512 | if(PicoMCD&1) return m68k_read_pcrelative_CD16(a);\r |
| 513 | if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom\r |
| 514 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram\r |
| 515 | return 0;//(u16) lastread_d;\r |
| 516 | }\r |
| 517 | unsigned int m68k_read_pcrelative_32(unsigned int a) {\r |
| 518 | a&=0xffffff;\r |
| 519 | if(PicoMCD&1) return m68k_read_pcrelative_CD32(a);\r |
| 520 | if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }\r |
| 521 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram\r |
| 522 | return 0;//lastread_d;\r |
| 523 | }\r |
| 524 | \r |
| 525 | unsigned int m68k_read_immediate_16(unsigned int a) { return m68k_read_pcrelative_16(a); }\r |
| 526 | unsigned int m68k_read_immediate_32(unsigned int a) { return m68k_read_pcrelative_32(a); }\r |
| 527 | unsigned int m68k_read_disassembler_8 (unsigned int a) { return m68k_read_pcrelative_8 (a); }\r |
| 528 | unsigned int m68k_read_disassembler_16(unsigned int a) { return m68k_read_pcrelative_16(a); }\r |
| 529 | unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_pcrelative_32(a); }\r |
| 530 | \r |
| 531 | #ifdef EMU_C68K\r |
| 532 | // ROM only\r |
| 533 | unsigned int m68k_read_memory_8(unsigned int a) { if(a<Pico.romsize) return *(u8 *) (Pico.rom+(a^1)); return (u8) lastread_d[lrp_mus++&15]; }\r |
| 534 | unsigned int m68k_read_memory_16(unsigned int a) { if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1));return (u16) lastread_d[lrp_mus++&15]; }\r |
| 535 | unsigned int m68k_read_memory_32(unsigned int a) { if(a<Pico.romsize) {u16 *pm=(u16 *)(Pico.rom+(a&~1));return (pm[0]<<16)|pm[1];} return lastread_d[lrp_mus++&15]; }\r |
| 536 | \r |
| 537 | // ignore writes, Cyclone already done that\r |
| 538 | void m68k_write_memory_8(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
| 539 | void m68k_write_memory_16(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
| 540 | void m68k_write_memory_32(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
| 541 | #else\r |
| 542 | unsigned char PicoReadCD8w (unsigned int a);\r |
| 543 | unsigned short PicoReadCD16w(unsigned int a);\r |
| 544 | unsigned int PicoReadCD32w(unsigned int a);\r |
| 545 | void PicoWriteCD8w (unsigned int a, unsigned char d);\r |
| 546 | void PicoWriteCD16w(unsigned int a, unsigned short d);\r |
| 547 | void PicoWriteCD32w(unsigned int a, unsigned int d);\r |
| 548 | \r |
| 549 | unsigned int m68k_read_memory_8(unsigned int address)\r |
| 550 | {\r |
| 551 | return (PicoMCD&1) ? PicoReadCD8w(address) : PicoRead8(address);\r |
| 552 | }\r |
| 553 | \r |
| 554 | unsigned int m68k_read_memory_16(unsigned int address)\r |
| 555 | {\r |
| 556 | return (PicoMCD&1) ? PicoReadCD16w(address) : PicoRead16(address);\r |
| 557 | }\r |
| 558 | \r |
| 559 | unsigned int m68k_read_memory_32(unsigned int address)\r |
| 560 | {\r |
| 561 | return (PicoMCD&1) ? PicoReadCD32w(address) : PicoRead32(address);\r |
| 562 | }\r |
| 563 | \r |
| 564 | void m68k_write_memory_8(unsigned int address, unsigned int value)\r |
| 565 | {\r |
| 566 | if (PicoMCD&1) PicoWriteCD8w(address, (u8)value); else PicoWrite8(address, (u8)value);\r |
| 567 | }\r |
| 568 | \r |
| 569 | void m68k_write_memory_16(unsigned int address, unsigned int value)\r |
| 570 | {\r |
| 571 | if (PicoMCD&1) PicoWriteCD16w(address,(u16)value); else PicoWrite16(address,(u16)value);\r |
| 572 | }\r |
| 573 | \r |
| 574 | void m68k_write_memory_32(unsigned int address, unsigned int value)\r |
| 575 | {\r |
| 576 | if (PicoMCD&1) PicoWriteCD32w(address, value); else PicoWrite32(address, value);\r |
| 577 | }\r |
| 578 | #endif\r |
| 579 | #endif // EMU_M68K\r |
| 580 | \r |
| 581 | \r |
| 582 | // -----------------------------------------------------------------\r |
| 583 | // z80 memhandlers\r |
| 584 | \r |
| 585 | unsigned char z80_read(unsigned short a)\r |
| 586 | {\r |
| 587 | u8 ret = 0;\r |
| 588 | \r |
| 589 | if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)\r |
| 590 | {\r |
| 591 | if(PicoOpt&1) ret = (u8) YM2612Read();\r |
| 592 | goto end;\r |
| 593 | }\r |
| 594 | \r |
| 595 | if (a>=0x8000)\r |
| 596 | {\r |
| 597 | u32 addr68k;\r |
| 598 | addr68k=Pico.m.z80_bank68k<<15;\r |
| 599 | addr68k+=a&0x7fff;\r |
| 600 | \r |
| 601 | ret = (u8) PicoRead8(addr68k);\r |
| 602 | //dprintf("z80->68k w8 : %06x, %02x", addr68k, ret);\r |
| 603 | goto end;\r |
| 604 | }\r |
| 605 | \r |
| 606 | // should not be needed || dprintf("z80_read RAM");\r |
| 607 | if (a<0x4000) { ret = (u8) Pico.zram[a&0x1fff]; goto end; }\r |
| 608 | \r |
| 609 | end:\r |
| 610 | return ret;\r |
| 611 | }\r |
| 612 | \r |
| 613 | unsigned short z80_read16(unsigned short a)\r |
| 614 | {\r |
| 615 | //dprintf("z80_read16");\r |
| 616 | \r |
| 617 | return (u16) ( (u16)z80_read(a) | ((u16)z80_read((u16)(a+1))<<8) );\r |
| 618 | }\r |
| 619 | \r |
| 620 | void z80_write(unsigned char data, unsigned short a)\r |
| 621 | {\r |
| 622 | //if (a<0x4000)\r |
| 623 | // dprintf("z80 w8 : %06x, %02x @%04x", a, data, mz80GetRegisterValue(NULL, 0));\r |
| 624 | \r |
| 625 | if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)\r |
| 626 | {\r |
| 627 | if(PicoOpt&1) emustatus|=YM2612Write(a, data);\r |
| 628 | return;\r |
| 629 | }\r |
| 630 | \r |
| 631 | if ((a&0xfff9)==0x7f11) // 7f11 7f13 7f15 7f17\r |
| 632 | {\r |
| 633 | if(PicoOpt&2) SN76496Write(data);\r |
| 634 | return;\r |
| 635 | }\r |
| 636 | \r |
| 637 | if ((a>>8)==0x60)\r |
| 638 | {\r |
| 639 | Pico.m.z80_bank68k>>=1;\r |
| 640 | Pico.m.z80_bank68k|=(data&1)<<8;\r |
| 641 | Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one\r |
| 642 | return;\r |
| 643 | }\r |
| 644 | \r |
| 645 | if (a>=0x8000)\r |
| 646 | {\r |
| 647 | u32 addr68k;\r |
| 648 | addr68k=Pico.m.z80_bank68k<<15;\r |
| 649 | addr68k+=a&0x7fff;\r |
| 650 | PicoWrite8(addr68k, data);\r |
| 651 | //dprintf("z80->68k w8 : %06x, %02x", addr68k, data);\r |
| 652 | return;\r |
| 653 | }\r |
| 654 | \r |
| 655 | // should not be needed, drZ80 knows how to access RAM itself || dprintf("z80_write RAM @ %08x", lr);\r |
| 656 | if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }\r |
| 657 | }\r |
| 658 | \r |
| 659 | void z80_write16(unsigned short data, unsigned short a)\r |
| 660 | {\r |
| 661 | //dprintf("z80_write16");\r |
| 662 | \r |
| 663 | z80_write((unsigned char) data,a);\r |
| 664 | z80_write((unsigned char)(data>>8),(u16)(a+1));\r |
| 665 | }\r |
| 666 | \r |