| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 1998 BERO\r |
| 5 | * Copyright (C) 2002 Xodnizel\r |
| 6 | *\r |
| 7 | * This program is free software; you can redistribute it and/or modify\r |
| 8 | * it under the terms of the GNU General Public License as published by\r |
| 9 | * the Free Software Foundation; either version 2 of the License, or\r |
| 10 | * (at your option) any later version.\r |
| 11 | *\r |
| 12 | * This program is distributed in the hope that it will be useful,\r |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
| 15 | * GNU General Public License for more details.\r |
| 16 | *\r |
| 17 | * You should have received a copy of the GNU General Public License\r |
| 18 | * along with this program; if not, write to the Free Software\r |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
| 20 | */\r |
| 21 | \r |
| 22 | #include "mapinc.h"\r |
| 23 | \r |
| 24 | static void GenMMC1Power(void);\r |
| 25 | static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery);\r |
| 26 | \r |
| 27 | static uint8 DRegs[4];\r |
| 28 | static uint8 Buffer,BufferShift;\r |
| 29 | \r |
| 30 | static int mmc1opts;\r |
| 31 | \r |
| 32 | static void (*MMC1CHRHook4)(uint32 A, uint8 V);\r |
| 33 | static void (*MMC1PRGHook16)(uint32 A, uint8 V);\r |
| 34 | \r |
| 35 | static uint8 *WRAM=NULL;\r |
| 36 | static uint8 *CHRRAM=NULL;\r |
| 37 | static int is155;\r |
| 38 | \r |
| 39 | static DECLFW(MBWRAM)\r |
| 40 | {\r |
| 41 | if(!(DRegs[3]&0x10)||is155)\r |
| 42 | Page[A>>11][A]=V; // WRAM is enabled.\r |
| 43 | }\r |
| 44 | \r |
| 45 | static DECLFR(MAWRAM)\r |
| 46 | {\r |
| 47 | if((DRegs[3]&0x10)&&!is155)\r |
| 48 | return X.DB; // WRAM is disabled\r |
| 49 | return(Page[A>>11][A]);\r |
| 50 | }\r |
| 51 | \r |
| 52 | static void MMC1CHR(void)\r |
| 53 | {\r |
| 54 | if(mmc1opts&4)\r |
| 55 | {\r |
| 56 | if(DRegs[0]&0x10)\r |
| 57 | setprg8r(0x10,0x6000,(DRegs[1]>>4)&1);\r |
| 58 | else\r |
| 59 | setprg8r(0x10,0x6000,(DRegs[1]>>3)&1);\r |
| 60 | }\r |
| 61 | if(MMC1CHRHook4)\r |
| 62 | {\r |
| 63 | if(DRegs[0]&0x10)\r |
| 64 | {\r |
| 65 | MMC1CHRHook4(0x0000,DRegs[1]);\r |
| 66 | MMC1CHRHook4(0x1000,DRegs[2]);\r |
| 67 | }\r |
| 68 | else\r |
| 69 | {\r |
| 70 | MMC1CHRHook4(0x0000,(DRegs[1]&0xFE));\r |
| 71 | MMC1CHRHook4(0x1000,DRegs[1]|1);\r |
| 72 | }\r |
| 73 | }\r |
| 74 | else\r |
| 75 | {\r |
| 76 | if(DRegs[0]&0x10)\r |
| 77 | {\r |
| 78 | setchr4(0x0000,DRegs[1]);\r |
| 79 | setchr4(0x1000,DRegs[2]);\r |
| 80 | }\r |
| 81 | else\r |
| 82 | setchr8(DRegs[1]>>1);\r |
| 83 | }\r |
| 84 | }\r |
| 85 | \r |
| 86 | static void MMC1PRG(void)\r |
| 87 | {\r |
| 88 | uint8 offs=DRegs[1]&0x10;\r |
| 89 | \r |
| 90 | if(MMC1PRGHook16)\r |
| 91 | {\r |
| 92 | switch(DRegs[0]&0xC)\r |
| 93 | {\r |
| 94 | case 0xC: MMC1PRGHook16(0x8000,(DRegs[3]+offs));\r |
| 95 | MMC1PRGHook16(0xC000,0xF+offs);\r |
| 96 | break;\r |
| 97 | case 0x8: MMC1PRGHook16(0xC000,(DRegs[3]+offs));\r |
| 98 | MMC1PRGHook16(0x8000,offs);\r |
| 99 | break;\r |
| 100 | case 0x0:\r |
| 101 | case 0x4:\r |
| 102 | MMC1PRGHook16(0x8000,((DRegs[3]&~1)+offs));\r |
| 103 | MMC1PRGHook16(0xc000,((DRegs[3]&~1)+offs+1));\r |
| 104 | break;\r |
| 105 | }\r |
| 106 | }\r |
| 107 | else switch(DRegs[0]&0xC)\r |
| 108 | {\r |
| 109 | case 0xC: setprg16(0x8000,(DRegs[3]+offs));\r |
| 110 | setprg16(0xC000,0xF+offs);\r |
| 111 | break;\r |
| 112 | case 0x8: setprg16(0xC000,(DRegs[3]+offs));\r |
| 113 | setprg16(0x8000,offs);\r |
| 114 | break;\r |
| 115 | case 0x0:\r |
| 116 | case 0x4:\r |
| 117 | setprg16(0x8000,((DRegs[3]&~1)+offs));\r |
| 118 | setprg16(0xc000,((DRegs[3]&~1)+offs+1));\r |
| 119 | break;\r |
| 120 | }\r |
| 121 | }\r |
| 122 | \r |
| 123 | static void MMC1MIRROR(void)\r |
| 124 | {\r |
| 125 | switch(DRegs[0]&3)\r |
| 126 | {\r |
| 127 | case 2: setmirror(MI_V); break;\r |
| 128 | case 3: setmirror(MI_H); break;\r |
| 129 | case 0: setmirror(MI_0); break;\r |
| 130 | case 1: setmirror(MI_1); break;\r |
| 131 | }\r |
| 132 | }\r |
| 133 | \r |
| 134 | \r |
| 135 | static uint64 lreset;\r |
| 136 | static DECLFW(MMC1_write)\r |
| 137 | {\r |
| 138 | int n=(A>>13)-4;\r |
| 139 | //FCEU_DispMessage("%016x",timestampbase+timestamp);\r |
| 140 | //printf("$%04x:$%02x, $%04x\n",A,V,X.PC);\r |
| 141 | //DumpMem("out",0xe000,0xffff);\r |
| 142 | \r |
| 143 | /* The MMC1 is busy so ignore the write. */\r |
| 144 | /* As of version FCE Ultra 0.81, the timestamp is only\r |
| 145 | increased before each instruction is executed(in other words\r |
| 146 | precision isn't that great), but this should still work to\r |
| 147 | deal with 2 writes in a row from a single RMW instruction. */\r |
| 148 | if((timestampbase+timestamp)<(lreset+2)) return;\r |
| 149 | \r |
| 150 | if(V&0x80)\r |
| 151 | {\r |
| 152 | DRegs[0]|=0xC;\r |
| 153 | BufferShift=Buffer=0;\r |
| 154 | MMC1PRG();\r |
| 155 | lreset=timestampbase+timestamp;\r |
| 156 | return;\r |
| 157 | }\r |
| 158 | Buffer|=(V&1)<<(BufferShift++);\r |
| 159 | if(BufferShift==5)\r |
| 160 | {\r |
| 161 | DRegs[n] = Buffer;\r |
| 162 | BufferShift = Buffer = 0;\r |
| 163 | switch(n)\r |
| 164 | {\r |
| 165 | case 0: MMC1MIRROR(); MMC1CHR(); MMC1PRG(); break;\r |
| 166 | case 1: MMC1CHR(); MMC1PRG(); break;\r |
| 167 | case 2: MMC1CHR(); break;\r |
| 168 | case 3: MMC1PRG(); break;\r |
| 169 | }\r |
| 170 | }\r |
| 171 | }\r |
| 172 | \r |
| 173 | static void MMC1_Restore(int version)\r |
| 174 | {\r |
| 175 | MMC1MIRROR();\r |
| 176 | MMC1CHR();\r |
| 177 | MMC1PRG();\r |
| 178 | //lreset=0; /* timestamp(base) is not stored in save states. */ // it is now!\r |
| 179 | }\r |
| 180 | \r |
| 181 | static void MMC1CMReset(void)\r |
| 182 | {\r |
| 183 | int i;\r |
| 184 | for(i=0;i<4;i++)\r |
| 185 | DRegs[i]=0;\r |
| 186 | Buffer = BufferShift = 0;\r |
| 187 | DRegs[0]=0x1F;\r |
| 188 | DRegs[1]=0;\r |
| 189 | DRegs[2]=0; // Should this be something other than 0?\r |
| 190 | DRegs[3]=0;\r |
| 191 | \r |
| 192 | MMC1MIRROR();\r |
| 193 | MMC1CHR();\r |
| 194 | MMC1PRG();\r |
| 195 | }\r |
| 196 | \r |
| 197 | static int DetectMMC1WRAMSize(uint32 crc32)\r |
| 198 | {\r |
| 199 | switch(crc32)\r |
| 200 | {\r |
| 201 | case 0xc6182024: /* Romance of the 3 Kingdoms */\r |
| 202 | case 0x2225c20f: /* Genghis Khan */\r |
| 203 | case 0x4642dda6: /* Nobunaga's Ambition */\r |
| 204 | case 0x29449ba9: /* "" "" (J) */\r |
| 205 | case 0x2b11e0b0: /* "" "" (J) */\r |
| 206 | FCEU_printf(" >8KB external WRAM present. Use UNIF if you hack the ROM image.\n");\r |
| 207 | return(16);\r |
| 208 | break;\r |
| 209 | default:return(8);\r |
| 210 | }\r |
| 211 | }\r |
| 212 | \r |
| 213 | static uint32 NWCIRQCount;\r |
| 214 | static uint8 NWCRec;\r |
| 215 | #define NWCDIP 0xE\r |
| 216 | \r |
| 217 | static void FP_FASTAPASS(1) NWCIRQHook(int a)\r |
| 218 | {\r |
| 219 | if(!(NWCRec&0x10))\r |
| 220 | {\r |
| 221 | NWCIRQCount+=a;\r |
| 222 | if((NWCIRQCount|(NWCDIP<<25))>=0x3e000000)\r |
| 223 | {\r |
| 224 | NWCIRQCount=0;\r |
| 225 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 226 | }\r |
| 227 | }\r |
| 228 | }\r |
| 229 | \r |
| 230 | static void NWCCHRHook(uint32 A, uint8 V)\r |
| 231 | {\r |
| 232 | if((V&0x10)) // && !(NWCRec&0x10))\r |
| 233 | {\r |
| 234 | NWCIRQCount=0;\r |
| 235 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 236 | }\r |
| 237 | NWCRec=V;\r |
| 238 | if(V&0x08)\r |
| 239 | MMC1PRG();\r |
| 240 | else\r |
| 241 | setprg32(0x8000,(V>>1)&3);\r |
| 242 | }\r |
| 243 | \r |
| 244 | static void NWCPRGHook(uint32 A, uint8 V)\r |
| 245 | {\r |
| 246 | if(NWCRec&0x8)\r |
| 247 | setprg16(A,8|(V&0x7));\r |
| 248 | else\r |
| 249 | setprg32(0x8000,(NWCRec>>1)&3);\r |
| 250 | }\r |
| 251 | \r |
| 252 | static void NWCPower(void)\r |
| 253 | {\r |
| 254 | GenMMC1Power();\r |
| 255 | setchr8r(0,0);\r |
| 256 | }\r |
| 257 | \r |
| 258 | void Mapper105_Init(CartInfo *info)\r |
| 259 | {\r |
| 260 | GenMMC1Init(info, 256, 256, 8, 0);\r |
| 261 | MMC1CHRHook4=NWCCHRHook;\r |
| 262 | MMC1PRGHook16=NWCPRGHook;\r |
| 263 | MapIRQHook=NWCIRQHook;\r |
| 264 | info->Power=NWCPower;\r |
| 265 | }\r |
| 266 | \r |
| 267 | static void GenMMC1Power(void)\r |
| 268 | {\r |
| 269 | lreset=0;\r |
| 270 | if(mmc1opts&1)\r |
| 271 | {\r |
| 272 | FCEU_CheatAddRAM(8,0x6000,WRAM);\r |
| 273 | if(mmc1opts&4)\r |
| 274 | FCEU_dwmemset(WRAM,0,8192)\r |
| 275 | else if(!(mmc1opts&2))\r |
| 276 | FCEU_dwmemset(WRAM,0,8192);\r |
| 277 | }\r |
| 278 | SetWriteHandler(0x8000,0xFFFF,MMC1_write);\r |
| 279 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 280 | \r |
| 281 | if(mmc1opts&1)\r |
| 282 | {\r |
| 283 | SetReadHandler(0x6000,0x7FFF,MAWRAM);\r |
| 284 | SetWriteHandler(0x6000,0x7FFF,MBWRAM);\r |
| 285 | setprg8r(0x10,0x6000,0);\r |
| 286 | }\r |
| 287 | \r |
| 288 | MMC1CMReset();\r |
| 289 | }\r |
| 290 | \r |
| 291 | static void GenMMC1Close(void)\r |
| 292 | {\r |
| 293 | if(CHRRAM)\r |
| 294 | FCEU_gfree(CHRRAM);\r |
| 295 | if(WRAM)\r |
| 296 | FCEU_gfree(WRAM);\r |
| 297 | CHRRAM=WRAM=NULL;\r |
| 298 | }\r |
| 299 | \r |
| 300 | static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery)\r |
| 301 | {\r |
| 302 | is155=0;\r |
| 303 | \r |
| 304 | info->Close=GenMMC1Close;\r |
| 305 | MMC1PRGHook16=MMC1CHRHook4=0;\r |
| 306 | mmc1opts=0;\r |
| 307 | PRGmask16[0]&=(prg>>14)-1;\r |
| 308 | CHRmask4[0]&=(chr>>12)-1;\r |
| 309 | CHRmask8[0]&=(chr>>13)-1;\r |
| 310 | \r |
| 311 | if(wram)\r |
| 312 | {\r |
| 313 | WRAM=(uint8*)FCEU_gmalloc(wram*1024);\r |
| 314 | mmc1opts|=1;\r |
| 315 | if(wram>8) mmc1opts|=4;\r |
| 316 | SetupCartPRGMapping(0x10,WRAM,wram*1024,1);\r |
| 317 | AddExState(WRAM, wram*1024, 0, "WRAM");\r |
| 318 | if(battery)\r |
| 319 | {\r |
| 320 | mmc1opts|=2;\r |
| 321 | info->SaveGame[0]=WRAM+((mmc1opts&4)?8192:0);\r |
| 322 | info->SaveGameLen[0]=8192;\r |
| 323 | }\r |
| 324 | }\r |
| 325 | if(!chr)\r |
| 326 | {\r |
| 327 | CHRRAM=(uint8*)FCEU_gmalloc(8192);\r |
| 328 | SetupCartCHRMapping(0, CHRRAM, 8192, 1);\r |
| 329 | AddExState(CHRRAM, 8192, 0, "CHRR");\r |
| 330 | }\r |
| 331 | AddExState(DRegs, 4, 0, "DREG");\r |
| 332 | \r |
| 333 | info->Power=GenMMC1Power;\r |
| 334 | GameStateRestore=MMC1_Restore;\r |
| 335 | AddExState(&lreset, 8, 1, "LRST");\r |
| 336 | AddExState(&Buffer, 1, 1, "BFFR");\r |
| 337 | AddExState(&BufferShift, 1, 1, "BFRS");\r |
| 338 | }\r |
| 339 | \r |
| 340 | void Mapper1_Init(CartInfo *info)\r |
| 341 | {\r |
| 342 | int ws=DetectMMC1WRAMSize(info->CRC32);\r |
| 343 | GenMMC1Init(info, 512, 256, ws, info->battery);\r |
| 344 | }\r |
| 345 | \r |
| 346 | /* Same as mapper 1, without respect for WRAM enable bit. */\r |
| 347 | void Mapper155_Init(CartInfo *info)\r |
| 348 | {\r |
| 349 | GenMMC1Init(info,512,256,8,info->battery);\r |
| 350 | is155=1;\r |
| 351 | }\r |
| 352 | \r |
| 353 | void SAROM_Init(CartInfo *info)\r |
| 354 | {\r |
| 355 | GenMMC1Init(info, 128, 64, 8, info->battery);\r |
| 356 | }\r |
| 357 | \r |
| 358 | void SBROM_Init(CartInfo *info)\r |
| 359 | {\r |
| 360 | GenMMC1Init(info, 128, 64, 0, 0);\r |
| 361 | }\r |
| 362 | \r |
| 363 | void SCROM_Init(CartInfo *info)\r |
| 364 | {\r |
| 365 | GenMMC1Init(info, 128, 128, 0, 0);\r |
| 366 | }\r |
| 367 | \r |
| 368 | void SEROM_Init(CartInfo *info)\r |
| 369 | {\r |
| 370 | GenMMC1Init(info, 32, 64, 0, 0);\r |
| 371 | }\r |
| 372 | \r |
| 373 | void SGROM_Init(CartInfo *info)\r |
| 374 | {\r |
| 375 | GenMMC1Init(info, 256, 0, 0, 0);\r |
| 376 | }\r |
| 377 | \r |
| 378 | void SKROM_Init(CartInfo *info)\r |
| 379 | {\r |
| 380 | GenMMC1Init(info, 256, 64, 8, info->battery);\r |
| 381 | }\r |
| 382 | \r |
| 383 | void SLROM_Init(CartInfo *info)\r |
| 384 | {\r |
| 385 | GenMMC1Init(info, 256, 128, 0, 0);\r |
| 386 | }\r |
| 387 | \r |
| 388 | void SL1ROM_Init(CartInfo *info)\r |
| 389 | {\r |
| 390 | GenMMC1Init(info, 128, 128, 0, 0);\r |
| 391 | }\r |
| 392 | \r |
| 393 | /* Begin unknown - may be wrong - perhaps they use different MMC1s from the\r |
| 394 | similarly functioning boards?\r |
| 395 | */\r |
| 396 | \r |
| 397 | void SL2ROM_Init(CartInfo *info)\r |
| 398 | {\r |
| 399 | GenMMC1Init(info, 256, 256, 0, 0);\r |
| 400 | }\r |
| 401 | \r |
| 402 | void SFROM_Init(CartInfo *info)\r |
| 403 | {\r |
| 404 | GenMMC1Init(info, 256, 256, 0, 0);\r |
| 405 | }\r |
| 406 | \r |
| 407 | void SHROM_Init(CartInfo *info)\r |
| 408 | {\r |
| 409 | GenMMC1Init(info, 256, 256, 0, 0);\r |
| 410 | }\r |
| 411 | \r |
| 412 | /* End unknown */\r |
| 413 | /* */\r |
| 414 | /* */\r |
| 415 | \r |
| 416 | void SNROM_Init(CartInfo *info)\r |
| 417 | {\r |
| 418 | GenMMC1Init(info, 256, 0, 8, info->battery);\r |
| 419 | }\r |
| 420 | \r |
| 421 | void SOROM_Init(CartInfo *info)\r |
| 422 | {\r |
| 423 | GenMMC1Init(info, 256, 0, 16, info->battery);\r |
| 424 | }\r |
| 425 | \r |
| 426 | \r |