| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2002 Xodnizel\r |
| 5 | *\r |
| 6 | * This program is free software; you can redistribute it and/or modify\r |
| 7 | * it under the terms of the GNU General Public License as published by\r |
| 8 | * the Free Software Foundation; either version 2 of the License, or\r |
| 9 | * (at your option) any later version.\r |
| 10 | *\r |
| 11 | * This program is distributed in the hope that it will be useful,\r |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
| 14 | * GNU General Public License for more details.\r |
| 15 | *\r |
| 16 | * You should have received a copy of the GNU General Public License\r |
| 17 | * along with this program; if not, write to the Free Software\r |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
| 19 | */\r |
| 20 | \r |
| 21 | #include <stdio.h>\r |
| 22 | #include <stdlib.h>\r |
| 23 | #include <string.h>\r |
| 24 | \r |
| 25 | #include "types.h"\r |
| 26 | #include "x6502.h"\r |
| 27 | #include "fce.h"\r |
| 28 | #include "fds.h"\r |
| 29 | #include "sound.h"\r |
| 30 | #include "general.h"\r |
| 31 | #include "state.h"\r |
| 32 | #include "file.h"\r |
| 33 | #include "memory.h"\r |
| 34 | #include "cart.h"\r |
| 35 | #include "md5.h"\r |
| 36 | #include "netplay.h"\r |
| 37 | \r |
| 38 | #include "svga.h"\r |
| 39 | \r |
| 40 | /* TODO: Add code to put a delay in between the time a disk is inserted\r |
| 41 | and the when it can be successfully read/written to. This should\r |
| 42 | prevent writes to wrong places OR add code to prevent disk ejects\r |
| 43 | when the virtual motor is on(mmm...virtual motor).\r |
| 44 | */\r |
| 45 | \r |
| 46 | static DECLFR(FDSRead4030);\r |
| 47 | static DECLFR(FDSRead4031);\r |
| 48 | static DECLFR(FDSRead4032);\r |
| 49 | static DECLFR(FDSRead4033);\r |
| 50 | \r |
| 51 | static DECLFW(FDSWrite);\r |
| 52 | \r |
| 53 | static DECLFW(FDSWaveWrite);\r |
| 54 | static DECLFR(FDSWaveRead);\r |
| 55 | \r |
| 56 | static DECLFR(FDSSRead);\r |
| 57 | static DECLFW(FDSSWrite);\r |
| 58 | static DECLFR(FDSBIOSRead);\r |
| 59 | static DECLFR(FDSRAMRead);\r |
| 60 | static DECLFW(FDSRAMWrite);\r |
| 61 | static void FDSInit(void);\r |
| 62 | static void FP_FASTAPASS(1) FDSFix(int a);\r |
| 63 | \r |
| 64 | #define FDSRAM GameMemBlock\r |
| 65 | #define CHRRAM (GameMemBlock+32768)\r |
| 66 | \r |
| 67 | static uint8 FDSRegs[6];\r |
| 68 | static int32 IRQLatch,IRQCount;\r |
| 69 | static uint8 IRQa;\r |
| 70 | static void FDSClose(void);\r |
| 71 | \r |
| 72 | static uint8 FDSBIOS[8192];\r |
| 73 | \r |
| 74 | /* Original disk data backup, to help in creating save states. */\r |
| 75 | static uint8 *diskdatao[8]={0,0,0,0,0,0,0,0};\r |
| 76 | \r |
| 77 | static uint8 *diskdata[8]={0,0,0,0,0,0,0,0};\r |
| 78 | \r |
| 79 | static unsigned int TotalSides;\r |
| 80 | static uint8 DiskWritten=0; /* Set to 1 if disk was written to. */\r |
| 81 | static uint8 writeskip;\r |
| 82 | static uint32 DiskPtr;\r |
| 83 | static int32 DiskSeekIRQ;\r |
| 84 | static uint8 SelectDisk,InDisk;\r |
| 85 | \r |
| 86 | #define DC_INC 1\r |
| 87 | \r |
| 88 | void FDSGI(int h)\r |
| 89 | {\r |
| 90 | switch(h)\r |
| 91 | {\r |
| 92 | case GI_CLOSE: FDSClose();break;\r |
| 93 | case GI_POWER: FDSInit();break;\r |
| 94 | }\r |
| 95 | }\r |
| 96 | \r |
| 97 | static void FDSStateRestore(int version)\r |
| 98 | {\r |
| 99 | int x;\r |
| 100 | \r |
| 101 | setmirror(((FDSRegs[5]&8)>>3)^1);\r |
| 102 | \r |
| 103 | if(version >= 9810)\r |
| 104 | for(x=0;x<TotalSides;x++)\r |
| 105 | {\r |
| 106 | int b;\r |
| 107 | for(b=0; b<65500; b++)\r |
| 108 | diskdata[x][b] ^= diskdatao[x][b];\r |
| 109 | }\r |
| 110 | \r |
| 111 | }\r |
| 112 | \r |
| 113 | void FDSSound();\r |
| 114 | void FDSSoundReset(void);\r |
| 115 | void FDSSoundStateAdd(void);\r |
| 116 | static void RenderSound(void);\r |
| 117 | //static void RenderSoundHQ(void);\r |
| 118 | \r |
| 119 | static void FDSInit(void)\r |
| 120 | {\r |
| 121 | memset(FDSRegs,0,sizeof(FDSRegs));\r |
| 122 | writeskip=DiskPtr=DiskSeekIRQ=0;\r |
| 123 | setmirror(1);\r |
| 124 | \r |
| 125 | setprg8r(0,0xe000,0); // BIOS\r |
| 126 | setprg32r(1,0x6000,0); // 32KB RAM\r |
| 127 | setchr8(0); // 8KB CHR RAM\r |
| 128 | \r |
| 129 | MapIRQHook=FDSFix;\r |
| 130 | GameStateRestore=FDSStateRestore;\r |
| 131 | \r |
| 132 | SetReadHandler(0x4030,0x4030,FDSRead4030);\r |
| 133 | SetReadHandler(0x4031,0x4031,FDSRead4031);\r |
| 134 | SetReadHandler(0x4032,0x4032,FDSRead4032);\r |
| 135 | SetReadHandler(0x4033,0x4033,FDSRead4033);\r |
| 136 | \r |
| 137 | SetWriteHandler(0x4020,0x4025,FDSWrite);\r |
| 138 | \r |
| 139 | SetWriteHandler(0x6000,0xdfff,FDSRAMWrite);\r |
| 140 | SetReadHandler(0x6000,0xdfff,FDSRAMRead);\r |
| 141 | SetReadHandler(0xE000,0xFFFF,FDSBIOSRead);\r |
| 142 | IRQCount=IRQLatch=IRQa=0;\r |
| 143 | \r |
| 144 | FDSSoundReset();\r |
| 145 | InDisk=0;\r |
| 146 | SelectDisk=0;\r |
| 147 | \r |
| 148 | #ifdef ASM_6502\r |
| 149 | {\r |
| 150 | int page;\r |
| 151 | // asm code needs pages to be set again..\r |
| 152 | for (page=12; page<28; page++) // 0x6000-0xdfff 32K RAM\r |
| 153 | Page[page]=FDSRAM - (page<<11) + ((page-12)<<11);\r |
| 154 | for (; page<32; page++) // 0xe000-0xffff 8K BIOS\r |
| 155 | Page[page]=FDSBIOS - (page<<11) + ((page-28)<<11);\r |
| 156 | }\r |
| 157 | #endif\r |
| 158 | }\r |
| 159 | \r |
| 160 | void FCEU_FDSInsert(void)\r |
| 161 | {\r |
| 162 | if(TotalSides==0)\r |
| 163 | {\r |
| 164 | FCEU_DispMessage("Not FDS; can't eject disk.");\r |
| 165 | return;\r |
| 166 | }\r |
| 167 | if(InDisk==255)\r |
| 168 | {\r |
| 169 | FCEU_DispMessage("Disk %d Side %s Inserted",SelectDisk>>1,(SelectDisk&1)?"B":"A");\r |
| 170 | InDisk=SelectDisk;\r |
| 171 | }\r |
| 172 | else\r |
| 173 | {\r |
| 174 | FCEU_DispMessage("Disk %d Side %s Ejected",SelectDisk>>1,(SelectDisk&1)?"B":"A");\r |
| 175 | InDisk=255;\r |
| 176 | }\r |
| 177 | }\r |
| 178 | /*\r |
| 179 | void FCEU_FDSEject(void)\r |
| 180 | {\r |
| 181 | InDisk=255;\r |
| 182 | }\r |
| 183 | */\r |
| 184 | void FCEU_FDSSelect(void)\r |
| 185 | {\r |
| 186 | if(TotalSides==0)\r |
| 187 | {\r |
| 188 | FCEU_DispMessage("Not FDS; can't select disk.");\r |
| 189 | return;\r |
| 190 | }\r |
| 191 | if(InDisk!=255)\r |
| 192 | {\r |
| 193 | FCEU_DispMessage("Eject disk before selecting.");\r |
| 194 | return;\r |
| 195 | }\r |
| 196 | SelectDisk=((SelectDisk+1)%TotalSides)&3;\r |
| 197 | FCEU_DispMessage("Disk %d Side %c Selected",SelectDisk>>1,(SelectDisk&1)?'B':'A');\r |
| 198 | }\r |
| 199 | \r |
| 200 | static void FP_FASTAPASS(1) FDSFix(int a)\r |
| 201 | {\r |
| 202 | if(IRQCount && (IRQa&2))\r |
| 203 | {\r |
| 204 | IRQCount-=a;\r |
| 205 | if(IRQCount<=0)\r |
| 206 | {\r |
| 207 | if(!(IRQa&1))\r |
| 208 | {\r |
| 209 | IRQa&=~2;\r |
| 210 | IRQCount=IRQLatch=0;\r |
| 211 | }\r |
| 212 | else\r |
| 213 | IRQCount=IRQLatch;\r |
| 214 | //IRQCount=IRQLatch; //0xFFFF;\r |
| 215 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 216 | //printf("IRQ: %d\n",timestamp);\r |
| 217 | // printf("IRQ: %d\n",scanline);\r |
| 218 | }\r |
| 219 | }\r |
| 220 | if(DiskSeekIRQ>0)\r |
| 221 | {\r |
| 222 | DiskSeekIRQ-=a;\r |
| 223 | if(DiskSeekIRQ<=0)\r |
| 224 | {\r |
| 225 | if(FDSRegs[5]&0x80)\r |
| 226 | {\r |
| 227 | X6502_IRQBegin(FCEU_IQEXT2);\r |
| 228 | }\r |
| 229 | }\r |
| 230 | }\r |
| 231 | }\r |
| 232 | \r |
| 233 | static DECLFR(FDSRead4030)\r |
| 234 | {\r |
| 235 | uint8 ret=0;\r |
| 236 | \r |
| 237 | /* Cheap hack. */\r |
| 238 | #ifndef ASM_6502\r |
| 239 | if(X.IRQlow&FCEU_IQEXT) ret|=1;\r |
| 240 | if(X.IRQlow&FCEU_IQEXT2) ret|=2;\r |
| 241 | #else\r |
| 242 | if((nes_registers[4]>>8)&FCEU_IQEXT) ret|=1;\r |
| 243 | if((nes_registers[4]>>8)&FCEU_IQEXT2) ret|=2;\r |
| 244 | #endif\r |
| 245 | \r |
| 246 | if(!fceuindbg)\r |
| 247 | {\r |
| 248 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 249 | X6502_IRQEnd(FCEU_IQEXT2);\r |
| 250 | }\r |
| 251 | return ret;\r |
| 252 | }\r |
| 253 | \r |
| 254 | static DECLFR(FDSRead4031)\r |
| 255 | {\r |
| 256 | static uint8 z=0;\r |
| 257 | if(InDisk!=255)\r |
| 258 | {\r |
| 259 | z=diskdata[InDisk][DiskPtr];\r |
| 260 | if(!fceuindbg)\r |
| 261 | {\r |
| 262 | if(DiskPtr<64999) DiskPtr++;\r |
| 263 | DiskSeekIRQ=150;\r |
| 264 | X6502_IRQEnd(FCEU_IQEXT2);\r |
| 265 | }\r |
| 266 | }\r |
| 267 | return z;\r |
| 268 | }\r |
| 269 | static DECLFR(FDSRead4032)\r |
| 270 | {\r |
| 271 | uint8 ret;\r |
| 272 | \r |
| 273 | ret=X.DB&~7;\r |
| 274 | if(InDisk==255)\r |
| 275 | ret|=5;\r |
| 276 | \r |
| 277 | if(InDisk==255 || !(FDSRegs[5]&1) || (FDSRegs[5]&2))\r |
| 278 | ret|=2;\r |
| 279 | return ret;\r |
| 280 | }\r |
| 281 | \r |
| 282 | static DECLFR(FDSRead4033)\r |
| 283 | {\r |
| 284 | return 0x80; // battery\r |
| 285 | }\r |
| 286 | \r |
| 287 | static DECLFW(FDSRAMWrite)\r |
| 288 | {\r |
| 289 | (FDSRAM-0x6000)[A]=V;\r |
| 290 | }\r |
| 291 | \r |
| 292 | static DECLFR(FDSBIOSRead)\r |
| 293 | {\r |
| 294 | return (FDSBIOS-0xE000)[A];\r |
| 295 | }\r |
| 296 | \r |
| 297 | static DECLFR(FDSRAMRead)\r |
| 298 | {\r |
| 299 | return (FDSRAM-0x6000)[A];\r |
| 300 | }\r |
| 301 | \r |
| 302 | /* Begin FDS sound */\r |
| 303 | \r |
| 304 | #define FDSClock (1789772.7272727272727272/2)\r |
| 305 | \r |
| 306 | typedef struct {\r |
| 307 | int64 cycles; // Cycles per PCM sample\r |
| 308 | int64 count; // Cycle counter\r |
| 309 | int64 envcount; // Envelope cycle counter\r |
| 310 | uint32 b19shiftreg60;\r |
| 311 | uint32 b24adder66;\r |
| 312 | uint32 b24latch68;\r |
| 313 | uint32 b17latch76;\r |
| 314 | int32 clockcount; // Counter to divide frequency by 8.\r |
| 315 | uint8 b8shiftreg88; // Modulation register.\r |
| 316 | uint8 amplitude[2]; // Current amplitudes.\r |
| 317 | uint8 speedo[2];\r |
| 318 | uint8 mwcount;\r |
| 319 | uint8 mwstart;\r |
| 320 | uint8 mwave[0x20]; // Modulation waveform\r |
| 321 | uint8 cwave[0x40]; // Game-defined waveform(carrier)\r |
| 322 | uint8 SPSG[0xB];\r |
| 323 | } FDSSOUND;\r |
| 324 | \r |
| 325 | static FDSSOUND fdso;\r |
| 326 | \r |
| 327 | #define SPSG fdso.SPSG\r |
| 328 | #define b19shiftreg60 fdso.b19shiftreg60\r |
| 329 | #define b24adder66 fdso.b24adder66\r |
| 330 | #define b24latch68 fdso.b24latch68\r |
| 331 | #define b17latch76 fdso.b17latch76\r |
| 332 | #define b8shiftreg88 fdso.b8shiftreg88\r |
| 333 | #define clockcount fdso.clockcount\r |
| 334 | #define amplitude fdso.amplitude\r |
| 335 | #define speedo fdso.speedo\r |
| 336 | \r |
| 337 | void FDSSoundStateAdd(void)\r |
| 338 | {\r |
| 339 | AddExState(fdso.cwave,64,0,"WAVE");\r |
| 340 | AddExState(fdso.mwave,32,0,"MWAV");\r |
| 341 | AddExState(amplitude,2,0,"AMPL");\r |
| 342 | AddExState(SPSG,0xB,0,"SPSG");\r |
| 343 | \r |
| 344 | AddExState(&b8shiftreg88,1,0,"B88");\r |
| 345 | \r |
| 346 | AddExState(&clockcount, 4, 1, "CLOC");\r |
| 347 | AddExState(&b19shiftreg60,4,1,"B60");\r |
| 348 | AddExState(&b24adder66,4,1,"B66");\r |
| 349 | AddExState(&b24latch68,4,1,"B68");\r |
| 350 | AddExState(&b17latch76,4,1,"B76");\r |
| 351 | \r |
| 352 | }\r |
| 353 | \r |
| 354 | static DECLFR(FDSSRead)\r |
| 355 | {\r |
| 356 | switch(A&0xF)\r |
| 357 | {\r |
| 358 | case 0x0:return(amplitude[0]|(X.DB&0xC0));\r |
| 359 | case 0x2:return(amplitude[1]|(X.DB&0xC0));\r |
| 360 | }\r |
| 361 | return(X.DB);\r |
| 362 | }\r |
| 363 | \r |
| 364 | static DECLFW(FDSSWrite)\r |
| 365 | {\r |
| 366 | if(FSettings.SndRate)\r |
| 367 | {\r |
| 368 | #if 0\r |
| 369 | if(FSettings.soundq>=1)\r |
| 370 | RenderSoundHQ();\r |
| 371 | else\r |
| 372 | #endif\r |
| 373 | RenderSound();\r |
| 374 | }\r |
| 375 | A-=0x4080;\r |
| 376 | switch(A)\r |
| 377 | {\r |
| 378 | case 0x0:\r |
| 379 | case 0x4: if(V&0x80)\r |
| 380 | amplitude[(A&0xF)>>2]=V&0x3F; //)>0x20?0x20:(V&0x3F);\r |
| 381 | break;\r |
| 382 | case 0x5://printf("$%04x:$%02x\n",A,V);\r |
| 383 | break;\r |
| 384 | case 0x7: b17latch76=0;SPSG[0x5]=0;//printf("$%04x:$%02x\n",A,V);\r |
| 385 | break;\r |
| 386 | case 0x8:\r |
| 387 | b17latch76=0;\r |
| 388 | // printf("%d:$%02x, $%02x\n",SPSG[0x5],V,b17latch76);\r |
| 389 | fdso.mwave[SPSG[0x5]&0x1F]=V&0x7;\r |
| 390 | SPSG[0x5]=(SPSG[0x5]+1)&0x1F;\r |
| 391 | break;\r |
| 392 | }\r |
| 393 | //if(A>=0x7 && A!=0x8 && A<=0xF)\r |
| 394 | //if(A==0xA || A==0x9)\r |
| 395 | //printf("$%04x:$%02x\n",A,V);\r |
| 396 | SPSG[A]=V;\r |
| 397 | }\r |
| 398 | \r |
| 399 | // $4080 - Fundamental wave amplitude data register 92\r |
| 400 | // $4082 - Fundamental wave frequency data register 58\r |
| 401 | // $4083 - Same as $4082($4083 is the upper 4 bits).\r |
| 402 | \r |
| 403 | // $4084 - Modulation amplitude data register 78\r |
| 404 | // $4086 - Modulation frequency data register 72\r |
| 405 | // $4087 - Same as $4086($4087 is the upper 4 bits)\r |
| 406 | \r |
| 407 | \r |
| 408 | static void DoEnv()\r |
| 409 | {\r |
| 410 | int x;\r |
| 411 | \r |
| 412 | for(x=0;x<2;x++)\r |
| 413 | if(!(SPSG[x<<2]&0x80) && !(SPSG[0x3]&0x40))\r |
| 414 | {\r |
| 415 | static int counto[2]={0,0};\r |
| 416 | \r |
| 417 | if(counto[x]<=0)\r |
| 418 | {\r |
| 419 | if(!(SPSG[x<<2]&0x80))\r |
| 420 | {\r |
| 421 | if(SPSG[x<<2]&0x40)\r |
| 422 | {\r |
| 423 | if(amplitude[x]<0x3F)\r |
| 424 | amplitude[x]++;\r |
| 425 | }\r |
| 426 | else\r |
| 427 | {\r |
| 428 | if(amplitude[x]>0)\r |
| 429 | amplitude[x]--;\r |
| 430 | }\r |
| 431 | }\r |
| 432 | counto[x]=(SPSG[x<<2]&0x3F);\r |
| 433 | }\r |
| 434 | else\r |
| 435 | counto[x]--;\r |
| 436 | }\r |
| 437 | }\r |
| 438 | \r |
| 439 | static DECLFR(FDSWaveRead)\r |
| 440 | {\r |
| 441 | return(fdso.cwave[A&0x3f]|(X.DB&0xC0));\r |
| 442 | }\r |
| 443 | \r |
| 444 | static DECLFW(FDSWaveWrite)\r |
| 445 | {\r |
| 446 | //printf("$%04x:$%02x, %d\n",A,V,SPSG[0x9]&0x80);\r |
| 447 | if(SPSG[0x9]&0x80)\r |
| 448 | fdso.cwave[A&0x3f]=V&0x3F;\r |
| 449 | }\r |
| 450 | \r |
| 451 | static int ta;\r |
| 452 | static INLINE void ClockRise(void)\r |
| 453 | {\r |
| 454 | if(!clockcount)\r |
| 455 | {\r |
| 456 | ta++;\r |
| 457 | \r |
| 458 | b19shiftreg60=(SPSG[0x2]|((SPSG[0x3]&0xF)<<8));\r |
| 459 | b17latch76=(SPSG[0x6]|((SPSG[0x07]&0xF)<<8))+b17latch76;\r |
| 460 | \r |
| 461 | if(!(SPSG[0x7]&0x80))\r |
| 462 | {\r |
| 463 | int t=fdso.mwave[(b17latch76>>13)&0x1F]&7;\r |
| 464 | int t2=amplitude[1];\r |
| 465 | int adj = 0;\r |
| 466 | \r |
| 467 | if((t&3))\r |
| 468 | {\r |
| 469 | if((t&4))\r |
| 470 | adj -= (t2 * ((4 - (t&3) ) ));\r |
| 471 | else\r |
| 472 | adj += (t2 * ( (t&3) ));\r |
| 473 | }\r |
| 474 | adj *= 2;\r |
| 475 | if(adj > 0x7F) adj = 0x7F;\r |
| 476 | if(adj < -0x80) adj = -0x80;\r |
| 477 | //if(adj) printf("%d ",adj);\r |
| 478 | b8shiftreg88=0x80 + adj;\r |
| 479 | }\r |
| 480 | else\r |
| 481 | {\r |
| 482 | b8shiftreg88=0x80;\r |
| 483 | }\r |
| 484 | }\r |
| 485 | else\r |
| 486 | {\r |
| 487 | b19shiftreg60<<=1;\r |
| 488 | b8shiftreg88>>=1;\r |
| 489 | }\r |
| 490 | // b24adder66=(b24latch68+b19shiftreg60)&0x3FFFFFF;\r |
| 491 | b24adder66=(b24latch68+b19shiftreg60)&0x1FFFFFF;\r |
| 492 | }\r |
| 493 | \r |
| 494 | static INLINE void ClockFall(void)\r |
| 495 | {\r |
| 496 | //if(!(SPSG[0x7]&0x80))\r |
| 497 | {\r |
| 498 | if((b8shiftreg88&1)) // || clockcount==7)\r |
| 499 | b24latch68=b24adder66;\r |
| 500 | }\r |
| 501 | clockcount=(clockcount+1)&7;\r |
| 502 | }\r |
| 503 | \r |
| 504 | static INLINE int32 FDSDoSound(int32 mul)\r |
| 505 | {\r |
| 506 | fdso.count+=fdso.cycles;\r |
| 507 | if(fdso.count>=((int64)1<<40))\r |
| 508 | {\r |
| 509 | dogk:\r |
| 510 | fdso.count-=(int64)1<<40;\r |
| 511 | ClockRise();\r |
| 512 | ClockFall();\r |
| 513 | fdso.envcount--;\r |
| 514 | if(fdso.envcount<=0)\r |
| 515 | {\r |
| 516 | fdso.envcount+=SPSG[0xA]*3;\r |
| 517 | DoEnv();\r |
| 518 | }\r |
| 519 | }\r |
| 520 | if(fdso.count>=32768) goto dogk;\r |
| 521 | \r |
| 522 | // Might need to emulate applying the amplitude to the waveform a bit better...\r |
| 523 | /*\r |
| 524 | {\r |
| 525 | int k=amplitude[0];\r |
| 526 | if(k>0x20) k=0x20;\r |
| 527 | return (fdso.cwave[b24latch68>>19]*k)*4/((SPSG[0x9]&0x3)+2);\r |
| 528 | }\r |
| 529 | */\r |
| 530 | return (fdso.cwave[b24latch68>>19]*mul)>>16;\r |
| 531 | }\r |
| 532 | \r |
| 533 | static int32 FBC=0;\r |
| 534 | \r |
| 535 | static void RenderSound(void)\r |
| 536 | {\r |
| 537 | int32 end, start;\r |
| 538 | int32 x;\r |
| 539 | int32 mul;\r |
| 540 | \r |
| 541 | start=FBC;\r |
| 542 | end=(SOUNDTS<<16)/soundtsinc;\r |
| 543 | if(end<=start)\r |
| 544 | return;\r |
| 545 | FBC=end;\r |
| 546 | \r |
| 547 | // hack for performance, might produce bad results..\r |
| 548 | if (!amplitude[0])\r |
| 549 | return;\r |
| 550 | \r |
| 551 | switch (SPSG[0x9]&0x3)\r |
| 552 | {\r |
| 553 | default:mul = (4<<16)/2;\r |
| 554 | case 1: mul = (4<<16)/3;\r |
| 555 | case 2: mul = (4<<16)/4;\r |
| 556 | case 3: mul = (4<<16)/5;\r |
| 557 | }\r |
| 558 | {\r |
| 559 | int k=amplitude[0];\r |
| 560 | if(k>0x20) k=0x20;\r |
| 561 | mul *= k;\r |
| 562 | }\r |
| 563 | \r |
| 564 | if(!(SPSG[0x9]&0x80))\r |
| 565 | for(x=start;x<end;x++)\r |
| 566 | {\r |
| 567 | uint32 t=FDSDoSound(mul);\r |
| 568 | t+=t>>1;\r |
| 569 | t>>=4;\r |
| 570 | Wave[x>>4]+=t; //(t>>2)-(t>>3); //>>3;\r |
| 571 | }\r |
| 572 | }\r |
| 573 | \r |
| 574 | #if 0\r |
| 575 | static void RenderSoundHQ(void)\r |
| 576 | {\r |
| 577 | int32 x;\r |
| 578 | \r |
| 579 | if(!(SPSG[0x9]&0x80))\r |
| 580 | for(x=FBC;x<SOUNDTS;x++)\r |
| 581 | {\r |
| 582 | uint32 t=FDSDoSound();\r |
| 583 | t+=t>>1;\r |
| 584 | WaveHi[x]+=t; //(t<<2)-(t<<1);\r |
| 585 | }\r |
| 586 | FBC=SOUNDTS;\r |
| 587 | }\r |
| 588 | #endif\r |
| 589 | \r |
| 590 | static void HQSync(int32 ts)\r |
| 591 | {\r |
| 592 | FBC=ts;\r |
| 593 | }\r |
| 594 | \r |
| 595 | void FDSSound(int c)\r |
| 596 | {\r |
| 597 | RenderSound();\r |
| 598 | FBC=c;\r |
| 599 | }\r |
| 600 | \r |
| 601 | /*\r |
| 602 | static DECLFR(FDSBIOSPatch)\r |
| 603 | {\r |
| 604 | if(FDSRegs[5]&0x4)\r |
| 605 | {\r |
| 606 | X.X=FDSRead4031(0x4031);\r |
| 607 | FDSWrite(0x4024,X.A);\r |
| 608 | X.A=X.X;\r |
| 609 | return(0x60);\r |
| 610 | }\r |
| 611 | else\r |
| 612 | {\r |
| 613 | return(0x58);\r |
| 614 | //puts("Write");\r |
| 615 | }\r |
| 616 | }\r |
| 617 | */\r |
| 618 | \r |
| 619 | static void FDS_ESI(void)\r |
| 620 | {\r |
| 621 | if(FSettings.SndRate)\r |
| 622 | {\r |
| 623 | #if 0\r |
| 624 | if(FSettings.soundq>=1)\r |
| 625 | {\r |
| 626 | fdso.cycles=(int64)1<<39;\r |
| 627 | }\r |
| 628 | else\r |
| 629 | #endif\r |
| 630 | {\r |
| 631 | fdso.cycles=((int64)1<<40)*FDSClock;\r |
| 632 | fdso.cycles/=FSettings.SndRate *16;\r |
| 633 | }\r |
| 634 | }\r |
| 635 | // fdso.cycles=(int64)32768*FDSClock/(FSettings.SndRate *16);\r |
| 636 | SetReadHandler(0x4040,0x407f,FDSWaveRead);\r |
| 637 | SetWriteHandler(0x4040,0x407f,FDSWaveWrite);\r |
| 638 | SetWriteHandler(0x4080,0x408A,FDSSWrite);\r |
| 639 | SetReadHandler(0x4090,0x4092,FDSSRead);\r |
| 640 | \r |
| 641 | //SetReadHandler(0xE7A3,0xE7A3,FDSBIOSPatch);\r |
| 642 | }\r |
| 643 | \r |
| 644 | void FDSSoundReset(void)\r |
| 645 | {\r |
| 646 | memset(&fdso,0,sizeof(fdso));\r |
| 647 | FDS_ESI();\r |
| 648 | GameExpSound.HiSync=HQSync;\r |
| 649 | GameExpSound.HiFill=0;//RenderSoundHQ;\r |
| 650 | GameExpSound.Fill=FDSSound;\r |
| 651 | GameExpSound.RChange=FDS_ESI;\r |
| 652 | }\r |
| 653 | \r |
| 654 | static DECLFW(FDSWrite)\r |
| 655 | {\r |
| 656 | //extern int scanline;\r |
| 657 | //FCEU_printf("$%04x:$%02x, %d\n",A,V,scanline);\r |
| 658 | switch(A)\r |
| 659 | {\r |
| 660 | case 0x4020:\r |
| 661 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 662 | IRQLatch&=0xFF00;\r |
| 663 | IRQLatch|=V;\r |
| 664 | // printf("$%04x:$%02x\n",A,V);\r |
| 665 | break;\r |
| 666 | case 0x4021:\r |
| 667 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 668 | IRQLatch&=0xFF;\r |
| 669 | IRQLatch|=V<<8;\r |
| 670 | // printf("$%04x:$%02x\n",A,V);\r |
| 671 | break;\r |
| 672 | case 0x4022:\r |
| 673 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 674 | IRQCount=IRQLatch;\r |
| 675 | IRQa=V&3;\r |
| 676 | // printf("$%04x:$%02x\n",A,V);\r |
| 677 | break;\r |
| 678 | case 0x4023:break;\r |
| 679 | case 0x4024:\r |
| 680 | if(InDisk!=255 && !(FDSRegs[5]&0x4) && (FDSRegs[3]&0x1))\r |
| 681 | {\r |
| 682 | if(DiskPtr>=0 && DiskPtr<65500)\r |
| 683 | {\r |
| 684 | if(writeskip) writeskip--;\r |
| 685 | else if(DiskPtr>=2)\r |
| 686 | {\r |
| 687 | DiskWritten=1;\r |
| 688 | diskdata[InDisk][DiskPtr-2]=V;\r |
| 689 | }\r |
| 690 | }\r |
| 691 | }\r |
| 692 | break;\r |
| 693 | case 0x4025:\r |
| 694 | X6502_IRQEnd(FCEU_IQEXT2);\r |
| 695 | if(InDisk!=255)\r |
| 696 | {\r |
| 697 | if(!(V&0x40))\r |
| 698 | {\r |
| 699 | if(FDSRegs[5]&0x40 && !(V&0x10))\r |
| 700 | {\r |
| 701 | DiskSeekIRQ=200;\r |
| 702 | DiskPtr-=2;\r |
| 703 | }\r |
| 704 | if(DiskPtr<0) DiskPtr=0;\r |
| 705 | }\r |
| 706 | if(!(V&0x4)) writeskip=2;\r |
| 707 | if(V&2) {DiskPtr=0;DiskSeekIRQ=200;}\r |
| 708 | if(V&0x40) DiskSeekIRQ=200;\r |
| 709 | }\r |
| 710 | setmirror(((V>>3)&1)^1);\r |
| 711 | break;\r |
| 712 | }\r |
| 713 | FDSRegs[A&7]=V;\r |
| 714 | }\r |
| 715 | \r |
| 716 | static void FreeFDSMemory(void)\r |
| 717 | {\r |
| 718 | int x;\r |
| 719 | \r |
| 720 | for(x=0;x<TotalSides;x++)\r |
| 721 | if(diskdata[x])\r |
| 722 | {\r |
| 723 | free(diskdata[x]);\r |
| 724 | diskdata[x]=0;\r |
| 725 | }\r |
| 726 | }\r |
| 727 | \r |
| 728 | static int SubLoad(int fp)\r |
| 729 | {\r |
| 730 | struct md5_context md5;\r |
| 731 | uint8 header[16];\r |
| 732 | int x;\r |
| 733 | \r |
| 734 | FCEU_fread(header,16,1,fp);\r |
| 735 | \r |
| 736 | if(memcmp(header,"FDS\x1a",4))\r |
| 737 | {\r |
| 738 | if(!(memcmp(header+1,"*NINTENDO-HVC*",14)))\r |
| 739 | {\r |
| 740 | long t;\r |
| 741 | t=FCEU_fgetsize(fp);\r |
| 742 | if(t<65500)\r |
| 743 | t=65500;\r |
| 744 | TotalSides=t/65500;\r |
| 745 | FCEU_fseek(fp,0,SEEK_SET);\r |
| 746 | }\r |
| 747 | else\r |
| 748 | return(0);\r |
| 749 | }\r |
| 750 | else\r |
| 751 | TotalSides=header[4];\r |
| 752 | \r |
| 753 | md5_starts(&md5);\r |
| 754 | \r |
| 755 | if(TotalSides>8) TotalSides=8;\r |
| 756 | if(TotalSides<1) TotalSides=1;\r |
| 757 | \r |
| 758 | for(x=0;x<TotalSides;x++)\r |
| 759 | {\r |
| 760 | diskdata[x]=(uint8 *)FCEU_malloc(65500);\r |
| 761 | if(!diskdata[x])\r |
| 762 | {\r |
| 763 | int zol;\r |
| 764 | for(zol=0;zol<x;zol++)\r |
| 765 | free(diskdata[zol]);\r |
| 766 | return 0;\r |
| 767 | }\r |
| 768 | FCEU_fread(diskdata[x],1,65500,fp);\r |
| 769 | md5_update(&md5,diskdata[x],65500);\r |
| 770 | }\r |
| 771 | md5_finish(&md5,FCEUGameInfo.MD5);\r |
| 772 | return(1);\r |
| 773 | }\r |
| 774 | \r |
| 775 | static void PreSave(void)\r |
| 776 | {\r |
| 777 | int x;\r |
| 778 | \r |
| 779 | //if(DiskWritten)\r |
| 780 | for(x=0;x<TotalSides;x++)\r |
| 781 | {\r |
| 782 | int b;\r |
| 783 | for(b=0; b<65500; b++)\r |
| 784 | diskdata[x][b] ^= diskdatao[x][b];\r |
| 785 | }\r |
| 786 | }\r |
| 787 | \r |
| 788 | static void PostSave(void)\r |
| 789 | {\r |
| 790 | int x;\r |
| 791 | \r |
| 792 | //if(DiskWritten)\r |
| 793 | for(x=0;x<TotalSides;x++)\r |
| 794 | {\r |
| 795 | int b;\r |
| 796 | \r |
| 797 | for(b=0; b<65500; b++)\r |
| 798 | diskdata[x][b] ^= diskdatao[x][b];\r |
| 799 | }\r |
| 800 | \r |
| 801 | }\r |
| 802 | \r |
| 803 | int FDSLoad(const char *name, int fp)\r |
| 804 | {\r |
| 805 | FILE *zp;\r |
| 806 | int x;\r |
| 807 | char *fn;\r |
| 808 | \r |
| 809 | FCEU_fseek(fp,0,SEEK_SET);\r |
| 810 | \r |
| 811 | if(!SubLoad(fp))\r |
| 812 | return(0);\r |
| 813 | \r |
| 814 | \r |
| 815 | fn = FCEU_MakeFName(FCEUMKF_FDSROM,0,0);\r |
| 816 | \r |
| 817 | if(!(zp=FCEUD_UTF8fopen(fn,"rb")))\r |
| 818 | {\r |
| 819 | FCEU_PrintError("FDS BIOS ROM image missing!");\r |
| 820 | FreeFDSMemory();\r |
| 821 | free(fn);\r |
| 822 | LoadGameLastError = 10;\r |
| 823 | return 0;\r |
| 824 | }\r |
| 825 | \r |
| 826 | free(fn);\r |
| 827 | \r |
| 828 | if(fread(FDSBIOS,1,8192,zp)!=8192)\r |
| 829 | {\r |
| 830 | fclose(zp);\r |
| 831 | FreeFDSMemory();\r |
| 832 | FCEU_PrintError("Error reading FDS BIOS ROM image.");\r |
| 833 | LoadGameLastError = 10;\r |
| 834 | return 0;\r |
| 835 | }\r |
| 836 | \r |
| 837 | fclose(zp);\r |
| 838 | \r |
| 839 | \r |
| 840 | {\r |
| 841 | int tp;\r |
| 842 | char *fn=FCEU_MakeFName(FCEUMKF_FDS,0,0);\r |
| 843 | \r |
| 844 | int x;\r |
| 845 | for(x=0;x<TotalSides;x++)\r |
| 846 | {\r |
| 847 | diskdatao[x]=(uint8 *)FCEU_malloc(65500);\r |
| 848 | memcpy(diskdatao[x],diskdata[x],65500);\r |
| 849 | }\r |
| 850 | \r |
| 851 | if((tp=FCEU_fopen(fn,"rb")))\r |
| 852 | {\r |
| 853 | FreeFDSMemory();\r |
| 854 | if(!SubLoad(tp))\r |
| 855 | {\r |
| 856 | FCEU_PrintError("Error reading auxillary FDS file.");\r |
| 857 | free(fn);\r |
| 858 | LoadGameLastError = 11;\r |
| 859 | return(0);\r |
| 860 | }\r |
| 861 | FCEU_fclose(tp);\r |
| 862 | DiskWritten=1; /* For save state handling. */\r |
| 863 | }\r |
| 864 | free(fn);\r |
| 865 | }\r |
| 866 | \r |
| 867 | FCEUGameInfo.type=GIT_FDS;\r |
| 868 | GameInterface=FDSGI;\r |
| 869 | \r |
| 870 | SelectDisk=0;\r |
| 871 | InDisk=255;\r |
| 872 | \r |
| 873 | ResetExState(PreSave,PostSave);\r |
| 874 | FDSSoundStateAdd();\r |
| 875 | \r |
| 876 | for(x=0;x<TotalSides;x++)\r |
| 877 | {\r |
| 878 | char temp[5];\r |
| 879 | sprintf(temp,"DDT%d",x);\r |
| 880 | AddExState(diskdata[x],65500,0,temp);\r |
| 881 | }\r |
| 882 | \r |
| 883 | AddExState(FDSRAM,32768,0,"FDSR");\r |
| 884 | AddExState(FDSRegs,sizeof(FDSRegs),0,"FREG");\r |
| 885 | AddExState(CHRRAM,8192,0,"CHRR");\r |
| 886 | AddExState(&IRQCount, 4, 1, "IRQC");\r |
| 887 | AddExState(&IRQLatch, 4, 1, "IQL1");\r |
| 888 | AddExState(&IRQa, 1, 0, "IRQA");\r |
| 889 | AddExState(&writeskip,1,0,"WSKI");\r |
| 890 | AddExState(&DiskPtr,4,1,"DPTR");\r |
| 891 | AddExState(&DiskSeekIRQ,4,1,"DSIR");\r |
| 892 | AddExState(&SelectDisk,1,0,"SELD");\r |
| 893 | AddExState(&InDisk,1,0,"INDI");\r |
| 894 | AddExState(&DiskWritten,1,0,"DSKW");\r |
| 895 | \r |
| 896 | ResetCartMapping();\r |
| 897 | SetupCartCHRMapping(0,CHRRAM,8192,1);\r |
| 898 | SetupCartMirroring(0,0,0);\r |
| 899 | memset(CHRRAM,0,8192);\r |
| 900 | memset(FDSRAM,0,32768);\r |
| 901 | \r |
| 902 | FCEU_printf(" Sides: %d\n\n",TotalSides);\r |
| 903 | \r |
| 904 | FCEUI_SetVidSystem(0);\r |
| 905 | \r |
| 906 | return 1;\r |
| 907 | }\r |
| 908 | \r |
| 909 | void FDSClose(void)\r |
| 910 | {\r |
| 911 | FILE *fp;\r |
| 912 | int x;\r |
| 913 | char *fn=FCEU_MakeFName(FCEUMKF_FDS,0,0);\r |
| 914 | \r |
| 915 | if(!DiskWritten) return;\r |
| 916 | \r |
| 917 | if(!(fp=FCEUD_UTF8fopen(fn,"wb")))\r |
| 918 | {\r |
| 919 | free(fn);\r |
| 920 | return;\r |
| 921 | }\r |
| 922 | free(fn);\r |
| 923 | \r |
| 924 | for(x=0;x<TotalSides;x++)\r |
| 925 | {\r |
| 926 | if(fwrite(diskdata[x],1,65500,fp)!=65500)\r |
| 927 | {\r |
| 928 | FCEU_PrintError("Error saving FDS image!");\r |
| 929 | fclose(fp);\r |
| 930 | return;\r |
| 931 | }\r |
| 932 | }\r |
| 933 | FreeFDSMemory();\r |
| 934 | fclose(fp);\r |
| 935 | }\r |