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