| 1 | // This is part of Pico Library\r |
| 2 | \r |
| 3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
| 4 | // (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\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 | #include "PicoInt.h"\r |
| 11 | #include "../zlib/zlib.h"\r |
| 12 | #include "../unzip/unzip.h"\r |
| 13 | #include "../unzip/unzip_stream.h"\r |
| 14 | \r |
| 15 | \r |
| 16 | static char *rom_exts[] = { "bin", "gen", "smd", "iso" };\r |
| 17 | \r |
| 18 | void (*PicoCartUnloadHook)(void) = NULL;\r |
| 19 | \r |
| 20 | void (*PicoCartLoadProgressCB)(int percent) = NULL;\r |
| 21 | void (*PicoCDLoadProgressCB)(int percent) = NULL; // handled in Pico/cd/cd_file.c\r |
| 22 | \r |
| 23 | static void PicoCartDetect(void);\r |
| 24 | \r |
| 25 | /* cso struct */\r |
| 26 | typedef struct _cso_struct\r |
| 27 | {\r |
| 28 | unsigned char in_buff[2*2048];\r |
| 29 | unsigned char out_buff[2048];\r |
| 30 | struct {\r |
| 31 | char magic[4];\r |
| 32 | unsigned int unused;\r |
| 33 | unsigned int total_bytes;\r |
| 34 | unsigned int total_bytes_high; // ignored here\r |
| 35 | unsigned int block_size; // 10h\r |
| 36 | unsigned char ver;\r |
| 37 | unsigned char align;\r |
| 38 | unsigned char reserved[2];\r |
| 39 | } header;\r |
| 40 | unsigned int fpos_in; // input file read pointer\r |
| 41 | unsigned int fpos_out; // pos in virtual decompressed file\r |
| 42 | int block_in_buff; // block which we have read in in_buff\r |
| 43 | int pad;\r |
| 44 | int index[0];\r |
| 45 | }\r |
| 46 | cso_struct;\r |
| 47 | \r |
| 48 | static int uncompress2(void *dest, int destLen, void *source, int sourceLen)\r |
| 49 | {\r |
| 50 | z_stream stream;\r |
| 51 | int err;\r |
| 52 | \r |
| 53 | stream.next_in = (Bytef*)source;\r |
| 54 | stream.avail_in = (uInt)sourceLen;\r |
| 55 | stream.next_out = dest;\r |
| 56 | stream.avail_out = (uInt)destLen;\r |
| 57 | \r |
| 58 | stream.zalloc = NULL;\r |
| 59 | stream.zfree = NULL;\r |
| 60 | \r |
| 61 | err = inflateInit2(&stream, -15);\r |
| 62 | if (err != Z_OK) return err;\r |
| 63 | \r |
| 64 | err = inflate(&stream, Z_FINISH);\r |
| 65 | if (err != Z_STREAM_END) {\r |
| 66 | inflateEnd(&stream);\r |
| 67 | return err;\r |
| 68 | }\r |
| 69 | //*destLen = stream.total_out;\r |
| 70 | \r |
| 71 | return inflateEnd(&stream);\r |
| 72 | }\r |
| 73 | \r |
| 74 | pm_file *pm_open(const char *path)\r |
| 75 | {\r |
| 76 | pm_file *file = NULL;\r |
| 77 | const char *ext;\r |
| 78 | FILE *f;\r |
| 79 | \r |
| 80 | if (path == NULL) return NULL;\r |
| 81 | \r |
| 82 | if (strlen(path) < 5) ext = NULL; // no ext\r |
| 83 | else ext = path + strlen(path) - 3;\r |
| 84 | \r |
| 85 | if (ext && strcasecmp(ext, "zip") == 0)\r |
| 86 | {\r |
| 87 | struct zipent *zipentry;\r |
| 88 | gzFile gzf = NULL;\r |
| 89 | ZIP *zipfile;\r |
| 90 | int i;\r |
| 91 | \r |
| 92 | zipfile = openzip(path);\r |
| 93 | \r |
| 94 | if (zipfile != NULL)\r |
| 95 | {\r |
| 96 | /* search for suitable file (right extension or large enough file) */\r |
| 97 | while ((zipentry = readzip(zipfile)) != NULL)\r |
| 98 | {\r |
| 99 | if (zipentry->uncompressed_size >= 128*1024) goto found_rom_zip;\r |
| 100 | if (strlen(zipentry->name) < 5) continue;\r |
| 101 | \r |
| 102 | ext = zipentry->name+strlen(zipentry->name)-3;\r |
| 103 | for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)\r |
| 104 | if (strcasecmp(ext, rom_exts[i]) == 0) goto found_rom_zip;\r |
| 105 | }\r |
| 106 | \r |
| 107 | /* zipfile given, but nothing found suitable for us inside */\r |
| 108 | goto zip_failed;\r |
| 109 | \r |
| 110 | found_rom_zip:\r |
| 111 | /* try to convert to gzip stream, so we could use standard gzio functions from zlib */\r |
| 112 | gzf = zip2gz(zipfile, zipentry);\r |
| 113 | if (gzf == NULL) goto zip_failed;\r |
| 114 | \r |
| 115 | file = malloc(sizeof(*file));\r |
| 116 | if (file == NULL) goto zip_failed;\r |
| 117 | file->file = zipfile;\r |
| 118 | file->param = gzf;\r |
| 119 | file->size = zipentry->uncompressed_size;\r |
| 120 | file->type = PMT_ZIP;\r |
| 121 | return file;\r |
| 122 | \r |
| 123 | zip_failed:\r |
| 124 | if (gzf) {\r |
| 125 | gzclose(gzf);\r |
| 126 | zipfile->fp = NULL; // gzclose() closed it\r |
| 127 | }\r |
| 128 | closezip(zipfile);\r |
| 129 | return NULL;\r |
| 130 | }\r |
| 131 | }\r |
| 132 | else if (ext && strcasecmp(ext, "cso") == 0)\r |
| 133 | {\r |
| 134 | cso_struct *cso = NULL, *tmp = NULL;\r |
| 135 | int size;\r |
| 136 | f = fopen(path, "rb");\r |
| 137 | if (f == NULL)\r |
| 138 | goto cso_failed;\r |
| 139 | \r |
| 140 | /* we use our own buffering */\r |
| 141 | setvbuf(f, NULL, _IONBF, 0);\r |
| 142 | \r |
| 143 | cso = malloc(sizeof(*cso));\r |
| 144 | if (cso == NULL)\r |
| 145 | goto cso_failed;\r |
| 146 | \r |
| 147 | if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))\r |
| 148 | goto cso_failed;\r |
| 149 | \r |
| 150 | if (strncmp(cso->header.magic, "CISO", 4) != 0) {\r |
| 151 | elprintf(EL_STATUS, "cso: bad header");\r |
| 152 | goto cso_failed;\r |
| 153 | }\r |
| 154 | \r |
| 155 | if (cso->header.block_size != 2048) {\r |
| 156 | elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);\r |
| 157 | goto cso_failed;\r |
| 158 | }\r |
| 159 | \r |
| 160 | size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);\r |
| 161 | tmp = realloc(cso, size);\r |
| 162 | if (tmp == NULL)\r |
| 163 | goto cso_failed;\r |
| 164 | cso = tmp;\r |
| 165 | elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);\r |
| 166 | \r |
| 167 | size -= sizeof(*cso); // index size\r |
| 168 | if (fread(cso->index, 1, size, f) != size) {\r |
| 169 | elprintf(EL_STATUS, "cso: premature EOF");\r |
| 170 | goto cso_failed;\r |
| 171 | }\r |
| 172 | \r |
| 173 | // all ok\r |
| 174 | cso->fpos_in = ftell(f);\r |
| 175 | cso->fpos_out = 0;\r |
| 176 | cso->block_in_buff = -1;\r |
| 177 | file = malloc(sizeof(*file));\r |
| 178 | if (file == NULL) goto cso_failed;\r |
| 179 | file->file = f;\r |
| 180 | file->param = cso;\r |
| 181 | file->size = cso->header.total_bytes;\r |
| 182 | file->type = PMT_CSO;\r |
| 183 | return file;\r |
| 184 | \r |
| 185 | cso_failed:\r |
| 186 | if (cso != NULL) free(cso);\r |
| 187 | if (f != NULL) fclose(f);\r |
| 188 | return NULL;\r |
| 189 | }\r |
| 190 | \r |
| 191 | /* not a zip, treat as uncompressed file */\r |
| 192 | f = fopen(path, "rb");\r |
| 193 | if (f == NULL) return NULL;\r |
| 194 | \r |
| 195 | /* we use our own buffering */\r |
| 196 | setvbuf(f, NULL, _IONBF, 0);\r |
| 197 | \r |
| 198 | file = malloc(sizeof(*file));\r |
| 199 | if (file == NULL) {\r |
| 200 | fclose(f);\r |
| 201 | return NULL;\r |
| 202 | }\r |
| 203 | fseek(f, 0, SEEK_END);\r |
| 204 | file->file = f;\r |
| 205 | file->param = NULL;\r |
| 206 | file->size = ftell(f);\r |
| 207 | file->type = PMT_UNCOMPRESSED;\r |
| 208 | fseek(f, 0, SEEK_SET);\r |
| 209 | \r |
| 210 | return file;\r |
| 211 | }\r |
| 212 | \r |
| 213 | size_t pm_read(void *ptr, size_t bytes, pm_file *stream)\r |
| 214 | {\r |
| 215 | int ret;\r |
| 216 | \r |
| 217 | if (stream->type == PMT_UNCOMPRESSED)\r |
| 218 | {\r |
| 219 | ret = fread(ptr, 1, bytes, stream->file);\r |
| 220 | }\r |
| 221 | else if (stream->type == PMT_ZIP)\r |
| 222 | {\r |
| 223 | gzFile gf = stream->param;\r |
| 224 | int err;\r |
| 225 | ret = gzread(gf, ptr, bytes);\r |
| 226 | err = gzerror2(gf);\r |
| 227 | if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))\r |
| 228 | /* we must reset stream pointer or else next seek/read fails */\r |
| 229 | gzrewind(gf);\r |
| 230 | }\r |
| 231 | else if (stream->type == PMT_CSO)\r |
| 232 | {\r |
| 233 | cso_struct *cso = stream->param;\r |
| 234 | int read_pos, read_len, out_offs, rret;\r |
| 235 | int block = cso->fpos_out >> 11;\r |
| 236 | int index = cso->index[block];\r |
| 237 | int index_end = cso->index[block+1];\r |
| 238 | unsigned char *out = ptr, *tmp_dst;\r |
| 239 | \r |
| 240 | ret = 0;\r |
| 241 | while (bytes != 0)\r |
| 242 | {\r |
| 243 | out_offs = cso->fpos_out&0x7ff;\r |
| 244 | if (out_offs == 0 && bytes >= 2048)\r |
| 245 | tmp_dst = out;\r |
| 246 | else tmp_dst = cso->out_buff;\r |
| 247 | \r |
| 248 | read_pos = (index&0x7fffffff) << cso->header.align;\r |
| 249 | \r |
| 250 | if (index < 0) {\r |
| 251 | if (read_pos != cso->fpos_in)\r |
| 252 | fseek(stream->file, read_pos, SEEK_SET);\r |
| 253 | rret = fread(tmp_dst, 1, 2048, stream->file);\r |
| 254 | cso->fpos_in = read_pos + rret;\r |
| 255 | if (rret != 2048) break;\r |
| 256 | } else {\r |
| 257 | read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;\r |
| 258 | if (block != cso->block_in_buff)\r |
| 259 | {\r |
| 260 | if (read_pos != cso->fpos_in)\r |
| 261 | fseek(stream->file, read_pos, SEEK_SET);\r |
| 262 | rret = fread(cso->in_buff, 1, read_len, stream->file);\r |
| 263 | cso->fpos_in = read_pos + rret;\r |
| 264 | if (rret != read_len) {\r |
| 265 | elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);\r |
| 266 | break;\r |
| 267 | }\r |
| 268 | cso->block_in_buff = block;\r |
| 269 | }\r |
| 270 | rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);\r |
| 271 | if (rret != 0) {\r |
| 272 | elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);\r |
| 273 | break;\r |
| 274 | }\r |
| 275 | }\r |
| 276 | \r |
| 277 | rret = 2048;\r |
| 278 | if (out_offs != 0 || bytes < 2048) {\r |
| 279 | //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);\r |
| 280 | if (bytes < rret) rret = bytes;\r |
| 281 | if (2048 - out_offs < rret) rret = 2048 - out_offs;\r |
| 282 | memcpy(out, tmp_dst + out_offs, rret);\r |
| 283 | }\r |
| 284 | ret += rret;\r |
| 285 | out += rret;\r |
| 286 | cso->fpos_out += rret;\r |
| 287 | bytes -= rret;\r |
| 288 | block++;\r |
| 289 | index = index_end;\r |
| 290 | index_end = cso->index[block+1];\r |
| 291 | }\r |
| 292 | }\r |
| 293 | else\r |
| 294 | ret = 0;\r |
| 295 | \r |
| 296 | return ret;\r |
| 297 | }\r |
| 298 | \r |
| 299 | int pm_seek(pm_file *stream, long offset, int whence)\r |
| 300 | {\r |
| 301 | if (stream->type == PMT_UNCOMPRESSED)\r |
| 302 | {\r |
| 303 | fseek(stream->file, offset, whence);\r |
| 304 | return ftell(stream->file);\r |
| 305 | }\r |
| 306 | else if (stream->type == PMT_ZIP)\r |
| 307 | {\r |
| 308 | if (PicoMessage != NULL && offset > 6*1024*1024) {\r |
| 309 | long pos = gztell((gzFile) stream->param);\r |
| 310 | if (offset < pos || offset - pos > 6*1024*1024)\r |
| 311 | PicoMessage("Decompressing data...");\r |
| 312 | }\r |
| 313 | return gzseek((gzFile) stream->param, offset, whence);\r |
| 314 | }\r |
| 315 | else if (stream->type == PMT_CSO)\r |
| 316 | {\r |
| 317 | cso_struct *cso = stream->param;\r |
| 318 | switch (whence)\r |
| 319 | {\r |
| 320 | case SEEK_CUR: cso->fpos_out += offset; break;\r |
| 321 | case SEEK_SET: cso->fpos_out = offset; break;\r |
| 322 | case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;\r |
| 323 | }\r |
| 324 | return cso->fpos_out;\r |
| 325 | }\r |
| 326 | else\r |
| 327 | return -1;\r |
| 328 | }\r |
| 329 | \r |
| 330 | int pm_close(pm_file *fp)\r |
| 331 | {\r |
| 332 | int ret = 0;\r |
| 333 | \r |
| 334 | if (fp == NULL) return EOF;\r |
| 335 | \r |
| 336 | if (fp->type == PMT_UNCOMPRESSED)\r |
| 337 | {\r |
| 338 | fclose(fp->file);\r |
| 339 | }\r |
| 340 | else if (fp->type == PMT_ZIP)\r |
| 341 | {\r |
| 342 | ZIP *zipfile = fp->file;\r |
| 343 | gzclose((gzFile) fp->param);\r |
| 344 | zipfile->fp = NULL; // gzclose() closed it\r |
| 345 | closezip(zipfile);\r |
| 346 | }\r |
| 347 | else if (fp->type == PMT_CSO)\r |
| 348 | {\r |
| 349 | free(fp->param);\r |
| 350 | fclose(fp->file);\r |
| 351 | }\r |
| 352 | else\r |
| 353 | ret = EOF;\r |
| 354 | \r |
| 355 | free(fp);\r |
| 356 | return ret;\r |
| 357 | }\r |
| 358 | \r |
| 359 | \r |
| 360 | void Byteswap(unsigned char *data,int len)\r |
| 361 | {\r |
| 362 | int i=0;\r |
| 363 | \r |
| 364 | if (len<2) return; // Too short\r |
| 365 | \r |
| 366 | do\r |
| 367 | {\r |
| 368 | unsigned short *pd=(unsigned short *)(data+i);\r |
| 369 | int value=*pd; // Get 2 bytes\r |
| 370 | \r |
| 371 | value=(value<<8)|(value>>8); // Byteswap it\r |
| 372 | *pd=(unsigned short)value; // Put 2b ytes\r |
| 373 | i+=2;\r |
| 374 | }\r |
| 375 | while (i+2<=len);\r |
| 376 | }\r |
| 377 | \r |
| 378 | // Interleve a 16k block and byteswap\r |
| 379 | static int InterleveBlock(unsigned char *dest,unsigned char *src)\r |
| 380 | {\r |
| 381 | int i=0;\r |
| 382 | for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd\r |
| 383 | for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even\r |
| 384 | return 0;\r |
| 385 | }\r |
| 386 | \r |
| 387 | // Decode a SMD file\r |
| 388 | static int DecodeSmd(unsigned char *data,int len)\r |
| 389 | {\r |
| 390 | unsigned char *temp=NULL;\r |
| 391 | int i=0;\r |
| 392 | \r |
| 393 | temp=(unsigned char *)malloc(0x4000);\r |
| 394 | if (temp==NULL) return 1;\r |
| 395 | memset(temp,0,0x4000);\r |
| 396 | \r |
| 397 | // Interleve each 16k block and shift down by 0x200:\r |
| 398 | for (i=0; i+0x4200<=len; i+=0x4000)\r |
| 399 | {\r |
| 400 | InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer\r |
| 401 | memcpy(data+i,temp,0x4000); // Copy back in\r |
| 402 | }\r |
| 403 | \r |
| 404 | free(temp);\r |
| 405 | return 0;\r |
| 406 | }\r |
| 407 | \r |
| 408 | static unsigned char *cd_realloc(void *old, int filesize)\r |
| 409 | {\r |
| 410 | unsigned char *rom;\r |
| 411 | rom=realloc(old, sizeof(mcd_state));\r |
| 412 | if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);\r |
| 413 | return rom;\r |
| 414 | }\r |
| 415 | \r |
| 416 | static unsigned char *PicoCartAlloc(int filesize)\r |
| 417 | {\r |
| 418 | int alloc_size;\r |
| 419 | unsigned char *rom;\r |
| 420 | \r |
| 421 | if (PicoAHW & PAHW_MCD) return cd_realloc(NULL, filesize);\r |
| 422 | \r |
| 423 | alloc_size=filesize+0x7ffff;\r |
| 424 | if((filesize&0x3fff)==0x200) alloc_size-=0x200;\r |
| 425 | alloc_size&=~0x7ffff; // use alloc size of multiples of 512K, so that memhandlers could be set up more efficiently\r |
| 426 | if((filesize&0x3fff)==0x200) alloc_size+=0x200;\r |
| 427 | else if(alloc_size-filesize < 4) alloc_size+=4; // padding for out-of-bound exec protection\r |
| 428 | \r |
| 429 | // Allocate space for the rom plus padding\r |
| 430 | rom=(unsigned char *)malloc(alloc_size);\r |
| 431 | if(rom) memset(rom+alloc_size-0x80000,0,0x80000);\r |
| 432 | return rom;\r |
| 433 | }\r |
| 434 | \r |
| 435 | int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize)\r |
| 436 | {\r |
| 437 | unsigned char *rom=NULL; int size, bytes_read;\r |
| 438 | if (f==NULL) return 1;\r |
| 439 | \r |
| 440 | size=f->size;\r |
| 441 | if (size <= 0) return 1;\r |
| 442 | size=(size+3)&~3; // Round up to a multiple of 4\r |
| 443 | \r |
| 444 | // Allocate space for the rom plus padding\r |
| 445 | rom=PicoCartAlloc(size);\r |
| 446 | if (rom==NULL) {\r |
| 447 | elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r |
| 448 | return 1;\r |
| 449 | }\r |
| 450 | \r |
| 451 | if (PicoCartLoadProgressCB != NULL)\r |
| 452 | {\r |
| 453 | // read ROM in blocks, just for fun\r |
| 454 | int ret;\r |
| 455 | unsigned char *p = rom;\r |
| 456 | bytes_read=0;\r |
| 457 | do\r |
| 458 | {\r |
| 459 | int todo = size - bytes_read;\r |
| 460 | if (todo > 256*1024) todo = 256*1024;\r |
| 461 | ret = pm_read(p,todo,f);\r |
| 462 | bytes_read += ret;\r |
| 463 | p += ret;\r |
| 464 | PicoCartLoadProgressCB(bytes_read * 100 / size);\r |
| 465 | }\r |
| 466 | while (ret > 0);\r |
| 467 | }\r |
| 468 | else\r |
| 469 | bytes_read = pm_read(rom,size,f); // Load up the rom\r |
| 470 | if (bytes_read <= 0) {\r |
| 471 | elprintf(EL_STATUS, "read failed");\r |
| 472 | free(rom);\r |
| 473 | return 1;\r |
| 474 | }\r |
| 475 | \r |
| 476 | // maybe we are loading MegaCD BIOS?\r |
| 477 | if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||\r |
| 478 | !strncmp((char *)rom+0x128, "BOOT", 4))) {\r |
| 479 | PicoAHW |= PAHW_MCD;\r |
| 480 | rom = cd_realloc(rom, size);\r |
| 481 | }\r |
| 482 | \r |
| 483 | // Check for SMD:\r |
| 484 | if (size >= 0x4200 && (size&0x3fff)==0x200 &&\r |
| 485 | ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {\r |
| 486 | DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD\r |
| 487 | }\r |
| 488 | else Byteswap(rom,size); // Just byteswap\r |
| 489 | \r |
| 490 | if (prom) *prom=rom;\r |
| 491 | if (psize) *psize=size;\r |
| 492 | \r |
| 493 | return 0;\r |
| 494 | }\r |
| 495 | \r |
| 496 | // Insert a cartridge:\r |
| 497 | int PicoCartInsert(unsigned char *rom,unsigned int romsize)\r |
| 498 | {\r |
| 499 | // notaz: add a 68k "jump one op back" opcode to the end of ROM.\r |
| 500 | // This will hang the emu, but will prevent nasty crashes.\r |
| 501 | // note: 4 bytes are padded to every ROM\r |
| 502 | if (rom != NULL)\r |
| 503 | *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r |
| 504 | \r |
| 505 | Pico.rom=rom;\r |
| 506 | Pico.romsize=romsize;\r |
| 507 | \r |
| 508 | if (SRam.data) {\r |
| 509 | free(SRam.data);\r |
| 510 | SRam.data = NULL;\r |
| 511 | }\r |
| 512 | \r |
| 513 | if (PicoCartUnloadHook != NULL) {\r |
| 514 | PicoCartUnloadHook();\r |
| 515 | PicoCartUnloadHook = NULL;\r |
| 516 | }\r |
| 517 | \r |
| 518 | PicoAHW &= PAHW_MCD;\r |
| 519 | \r |
| 520 | PicoMemResetHooks();\r |
| 521 | PicoDmaHook = NULL;\r |
| 522 | PicoResetHook = NULL;\r |
| 523 | PicoLineHook = NULL;\r |
| 524 | PicoLoadStateHook = NULL;\r |
| 525 | carthw_chunks = NULL;\r |
| 526 | \r |
| 527 | PicoMemReset();\r |
| 528 | \r |
| 529 | if (!(PicoAHW & PAHW_MCD))\r |
| 530 | PicoCartDetect();\r |
| 531 | \r |
| 532 | // setup correct memory map for loaded ROM\r |
| 533 | // call PicoMemReset again due to possible memmap change\r |
| 534 | switch (PicoAHW) {\r |
| 535 | default:\r |
| 536 | elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);\r |
| 537 | case 0:\r |
| 538 | case PAHW_SVP: PicoMemSetup(); break;\r |
| 539 | case PAHW_MCD: PicoMemSetupCD(); break;\r |
| 540 | case PAHW_PICO: PicoMemSetupPico(); break;\r |
| 541 | }\r |
| 542 | PicoMemReset();\r |
| 543 | \r |
| 544 | PicoPower();\r |
| 545 | return 0;\r |
| 546 | }\r |
| 547 | \r |
| 548 | int PicoCartUnload(void)\r |
| 549 | {\r |
| 550 | if (Pico.rom != NULL) {\r |
| 551 | free(Pico.rom);\r |
| 552 | Pico.rom=NULL;\r |
| 553 | }\r |
| 554 | return 0;\r |
| 555 | }\r |
| 556 | \r |
| 557 | static int rom_strcmp(int rom_offset, const char *s1)\r |
| 558 | {\r |
| 559 | int i, len = strlen(s1);\r |
| 560 | const char *s_rom = (const char *)Pico.rom + rom_offset;\r |
| 561 | for (i = 0; i < len; i++)\r |
| 562 | if (s1[i] != s_rom[i^1])\r |
| 563 | return 1;\r |
| 564 | return 0;\r |
| 565 | }\r |
| 566 | \r |
| 567 | static int name_cmp(const char *name)\r |
| 568 | {\r |
| 569 | return rom_strcmp(0x150, name);\r |
| 570 | }\r |
| 571 | \r |
| 572 | /*\r |
| 573 | * various cart-specific things, which can't be handled by generic code\r |
| 574 | * (maybe I should start using CRC for this stuff?)\r |
| 575 | */\r |
| 576 | static void PicoCartDetect(void)\r |
| 577 | {\r |
| 578 | int sram_size = 0, csum;\r |
| 579 | Pico.m.sram_reg = 0;\r |
| 580 | \r |
| 581 | csum = PicoRead32(0x18c) & 0xffff;\r |
| 582 | \r |
| 583 | if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r |
| 584 | {\r |
| 585 | if (Pico.rom[0x1B2] & 0x40)\r |
| 586 | {\r |
| 587 | // EEPROM\r |
| 588 | SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r |
| 589 | SRam.end = PicoRead32(0x1B8);\r |
| 590 | sram_size = 0x2000;\r |
| 591 | Pico.m.sram_reg |= 4;\r |
| 592 | } else {\r |
| 593 | // normal SRAM\r |
| 594 | SRam.start = PicoRead32(0x1B4) & ~0xff;\r |
| 595 | SRam.end = PicoRead32(0x1B8) | 1;\r |
| 596 | sram_size = SRam.end - SRam.start + 1;\r |
| 597 | }\r |
| 598 | SRam.start &= ~0xff000000;\r |
| 599 | SRam.end &= ~0xff000000;\r |
| 600 | Pico.m.sram_reg |= 0x10; // SRAM was detected\r |
| 601 | }\r |
| 602 | if (sram_size <= 0)\r |
| 603 | {\r |
| 604 | // some games may have bad headers, like S&K and Sonic3\r |
| 605 | // note: majority games use 0x200000 as starting address, but there are some which\r |
| 606 | // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r |
| 607 | SRam.start = 0x200000;\r |
| 608 | SRam.end = 0x203FFF;\r |
| 609 | sram_size = 0x004000;\r |
| 610 | }\r |
| 611 | \r |
| 612 | // this game actually doesn't have SRAM, but some weird protection\r |
| 613 | if (rom_strcmp(0x120, "PUGGSY") == 0)\r |
| 614 | {\r |
| 615 | SRam.start = SRam.end = sram_size = 0;\r |
| 616 | }\r |
| 617 | \r |
| 618 | if (sram_size)\r |
| 619 | {\r |
| 620 | SRam.data = (unsigned char *) calloc(sram_size, 1);\r |
| 621 | if (SRam.data == NULL) return;\r |
| 622 | }\r |
| 623 | SRam.changed = 0;\r |
| 624 | \r |
| 625 | // set EEPROM defaults, in case it gets detected\r |
| 626 | SRam.eeprom_type = 0; // 7bit (24C01)\r |
| 627 | SRam.eeprom_abits = 3; // eeprom access must be odd addr for: bit0 ~ cl, bit1 ~ in\r |
| 628 | SRam.eeprom_bit_cl = 1;\r |
| 629 | SRam.eeprom_bit_in = 0;\r |
| 630 | SRam.eeprom_bit_out= 0;\r |
| 631 | \r |
| 632 | // some known EEPROM data (thanks to EkeEke)\r |
| 633 | if (name_cmp("COLLEGE SLAM") == 0 ||\r |
| 634 | name_cmp("FRANK THOMAS BIGHURT BASEBAL") == 0)\r |
| 635 | {\r |
| 636 | SRam.eeprom_type = 3;\r |
| 637 | SRam.eeprom_abits = 2;\r |
| 638 | SRam.eeprom_bit_cl = 0;\r |
| 639 | }\r |
| 640 | else if (name_cmp("NBA JAM TOURNAMENT EDITION") == 0 ||\r |
| 641 | name_cmp("NFL QUARTERBACK CLUB") == 0)\r |
| 642 | {\r |
| 643 | SRam.eeprom_type = 2;\r |
| 644 | SRam.eeprom_abits = 2;\r |
| 645 | SRam.eeprom_bit_cl = 0;\r |
| 646 | }\r |
| 647 | else if (name_cmp("NBA JAM") == 0)\r |
| 648 | {\r |
| 649 | SRam.eeprom_type = 2;\r |
| 650 | SRam.eeprom_bit_out = 1;\r |
| 651 | SRam.eeprom_abits = 0;\r |
| 652 | }\r |
| 653 | else if (name_cmp("NHLPA HOCKEY '93") == 0 ||\r |
| 654 | name_cmp("NHLPA Hockey '93") == 0 ||\r |
| 655 | name_cmp("RINGS OF POWER") == 0)\r |
| 656 | {\r |
| 657 | SRam.start = SRam.end = 0x200000;\r |
| 658 | Pico.m.sram_reg = 0x14;\r |
| 659 | SRam.eeprom_abits = 0;\r |
| 660 | SRam.eeprom_bit_cl = 6;\r |
| 661 | SRam.eeprom_bit_in = 7;\r |
| 662 | SRam.eeprom_bit_out= 7;\r |
| 663 | }\r |
| 664 | else if ( name_cmp("MICRO MACHINES II") == 0 ||\r |
| 665 | (name_cmp(" ") == 0 && // Micro Machines {Turbo Tournament '96, Military - It's a Blast!}\r |
| 666 | (csum == 0x165e || csum == 0x168b || csum == 0xCEE0 || csum == 0x2C41)))\r |
| 667 | {\r |
| 668 | SRam.start = 0x300000;\r |
| 669 | SRam.end = 0x380001;\r |
| 670 | Pico.m.sram_reg = 0x14;\r |
| 671 | SRam.eeprom_type = 2;\r |
| 672 | SRam.eeprom_abits = 0;\r |
| 673 | SRam.eeprom_bit_cl = 1;\r |
| 674 | SRam.eeprom_bit_in = 0;\r |
| 675 | SRam.eeprom_bit_out= 7;\r |
| 676 | }\r |
| 677 | \r |
| 678 | // SVP detection\r |
| 679 | else if (name_cmp("Virtua Racing") == 0 ||\r |
| 680 | name_cmp("VIRTUA RACING") == 0)\r |
| 681 | {\r |
| 682 | PicoSVPStartup();\r |
| 683 | }\r |
| 684 | \r |
| 685 | // Pico\r |
| 686 | else if (rom_strcmp(0x100, "SEGA PICO") == 0 ||\r |
| 687 | rom_strcmp(0x100, "IMA IKUNOUJYUKU") == 0) // what is that supposed to mean?\r |
| 688 | {\r |
| 689 | PicoInitPico();\r |
| 690 | }\r |
| 691 | \r |
| 692 | // Detect 12-in-1 mapper\r |
| 693 | else if ((name_cmp("ROBOCOP 3") == 0 && Pico.romsize == 0x200000) ||\r |
| 694 | (rom_strcmp(0x160, "FLICKY") == 0 && Pico.romsize >= 0x200000) ||\r |
| 695 | (name_cmp(" SHOVE IT!") == 0 && Pico.romsize >= 0x200000) ||\r |
| 696 | (name_cmp("MS PACMAN") == 0 && Pico.romsize >= 0x200000)) // bad dump?\r |
| 697 | {\r |
| 698 | carthw_12in1_startup();\r |
| 699 | }\r |
| 700 | \r |
| 701 | // Realtec mapper\r |
| 702 | else if (Pico.romsize == 512*1024 && (\r |
| 703 | rom_strcmp(0x94, "THE EARTH DEFEND") == 0 ||\r |
| 704 | rom_strcmp(0xfe, "WISEGAME 11-03-1993") == 0 || // Funny World\r |
| 705 | rom_strcmp(0x95, "MALLET LEGEND ") == 0)) // Whac-A-Critter\r |
| 706 | {\r |
| 707 | carthw_realtec_startup();\r |
| 708 | }\r |
| 709 | \r |
| 710 | // Radica mapper\r |
| 711 | else if (name_cmp("KID CHAMELEON") == 0 && Pico.romsize > 0x100000)\r |
| 712 | {\r |
| 713 | carthw_radica_startup();\r |
| 714 | }\r |
| 715 | \r |
| 716 | // Some games malfunction if SRAM is not filled with 0xff\r |
| 717 | if (name_cmp("DINO DINI'S SOCCER") == 0 ||\r |
| 718 | name_cmp("MICRO MACHINES II") == 0)\r |
| 719 | {\r |
| 720 | memset(SRam.data, 0xff, sram_size);\r |
| 721 | }\r |
| 722 | \r |
| 723 | // Unusual region 'code'\r |
| 724 | if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r |
| 725 | *(int *) (Pico.rom+0x1f0) = 0x20204520;\r |
| 726 | }\r |
| 727 | \r |