cc68a136 |
1 | // This is part of Pico Library\r |
2 | \r |
3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
6cadc2da |
4 | // (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r |
cc68a136 |
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 |
83bd0b76 |
11 | #include "../zlib/zlib.h"\r |
12 | #include "../unzip/unzip.h"\r |
13 | #include "../unzip/unzip_stream.h"\r |
14 | \r |
7336a99a |
15 | \r |
83bd0b76 |
16 | static char *rom_exts[] = { "bin", "gen", "smd", "iso" };\r |
17 | \r |
e807ac75 |
18 | void (*PicoCartUnloadHook)(void) = NULL;\r |
19 | \r |
a9b3ffd3 |
20 | void (*PicoCartLoadProgressCB)(int percent) = NULL;\r |
4b167c12 |
21 | void (*PicoCDLoadProgressCB)(int percent) = NULL; // handled in Pico/cd/cd_file.c\r |
a9b3ffd3 |
22 | \r |
71de3cd9 |
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 |
83bd0b76 |
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 |
d0ae0cb4 |
102 | if (strcasecmp(ext, rom_exts[i]) == 0) goto found_rom_zip;\r |
83bd0b76 |
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 |
71de3cd9 |
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 |
83bd0b76 |
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 |
7336a99a |
190 | /* we use our own buffering */\r |
191 | setvbuf(f, NULL, _IONBF, 0);\r |
192 | \r |
83bd0b76 |
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 |
71de3cd9 |
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 |
ff6b7429 |
255 | fseek(stream->file, read_pos, SEEK_SET);\r |
71de3cd9 |
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 |
83bd0b76 |
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 |
7336a99a |
297 | fseek(stream->file, offset, whence);\r |
298 | return ftell(stream->file);\r |
83bd0b76 |
299 | }\r |
300 | else if (stream->type == PMT_ZIP)\r |
301 | {\r |
66fdc0f0 |
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 |
83bd0b76 |
307 | return gzseek((gzFile) stream->param, offset, whence);\r |
308 | }\r |
71de3cd9 |
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 |
83bd0b76 |
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 |
71de3cd9 |
341 | else if (fp->type == PMT_CSO)\r |
342 | {\r |
343 | free(fp->param);\r |
344 | fclose(fp->file);\r |
345 | }\r |
83bd0b76 |
346 | else\r |
347 | ret = EOF;\r |
348 | \r |
349 | free(fp);\r |
350 | return ret;\r |
351 | }\r |
352 | \r |
cc68a136 |
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 |
bf098bc5 |
402 | static unsigned char *cd_realloc(void *old, int filesize)\r |
403 | {\r |
404 | unsigned char *rom;\r |
bf098bc5 |
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 |
cc68a136 |
410 | static unsigned char *PicoCartAlloc(int filesize)\r |
411 | {\r |
412 | int alloc_size;\r |
413 | unsigned char *rom;\r |
414 | \r |
bf098bc5 |
415 | if (PicoMCD & 1) return cd_realloc(NULL, filesize);\r |
cc68a136 |
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 |
cc68a136 |
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 |
83bd0b76 |
429 | int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize)\r |
cc68a136 |
430 | {\r |
a9b3ffd3 |
431 | unsigned char *rom=NULL; int size, bytes_read;\r |
cc68a136 |
432 | if (f==NULL) return 1;\r |
433 | \r |
83bd0b76 |
434 | size=f->size;\r |
cc68a136 |
435 | if (size <= 0) return 1;\r |
bf098bc5 |
436 | size=(size+3)&~3; // Round up to a multiple of 4\r |
cc68a136 |
437 | \r |
438 | // Allocate space for the rom plus padding\r |
439 | rom=PicoCartAlloc(size);\r |
7336a99a |
440 | if (rom==NULL) {\r |
c6196c0f |
441 | elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r |
7336a99a |
442 | return 1;\r |
443 | }\r |
cc68a136 |
444 | \r |
a9b3ffd3 |
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 |
c6196c0f |
465 | elprintf(EL_STATUS, "read failed");\r |
a9b3ffd3 |
466 | free(rom);\r |
467 | return 1;\r |
468 | }\r |
bf098bc5 |
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 |
cc68a136 |
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 |
f8ef8ff7 |
486 | // Insert a cartridge:\r |
cc68a136 |
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 |
cc68a136 |
495 | Pico.rom=rom;\r |
496 | Pico.romsize=romsize;\r |
497 | \r |
e807ac75 |
498 | if (PicoCartUnloadHook != NULL) {\r |
499 | PicoCartUnloadHook();\r |
500 | PicoCartUnloadHook = NULL;\r |
501 | }\r |
502 | \r |
f8ef8ff7 |
503 | PicoMemResetHooks();\r |
504 | PicoDmaHook = NULL;\r |
505 | PicoResetHook = NULL;\r |
017512f2 |
506 | PicoLineHook = NULL;\r |
fad24893 |
507 | PicoLoadStateHook = NULL;\r |
945c2fdc |
508 | carthw_chunks = NULL;\r |
f8ef8ff7 |
509 | \r |
0ffefdb8 |
510 | PicoMemReset();\r |
511 | \r |
f8ef8ff7 |
512 | if (!(PicoMCD & 1))\r |
513 | PicoCartDetect();\r |
514 | \r |
1dceadae |
515 | // setup correct memory map for loaded ROM\r |
0ffefdb8 |
516 | // call PicoMemReset again due to possible memmap change\r |
1dceadae |
517 | if (PicoMCD & 1)\r |
518 | PicoMemSetupCD();\r |
519 | else PicoMemSetup();\r |
520 | PicoMemReset();\r |
521 | \r |
cc68a136 |
522 | return PicoReset(1);\r |
523 | }\r |
524 | \r |
a12b1b29 |
525 | int PicoCartUnload(void)\r |
cc68a136 |
526 | {\r |
a12b1b29 |
527 | if (Pico.rom != NULL) {\r |
528 | free(Pico.rom);\r |
529 | Pico.rom=NULL;\r |
530 | }\r |
cc68a136 |
531 | return 0;\r |
532 | }\r |
533 | \r |
1f4e9f14 |
534 | static int rom_strcmp(int rom_offset, const char *s1)\r |
1dceadae |
535 | {\r |
1f4e9f14 |
536 | int i, len = strlen(s1);\r |
537 | const char *s_rom = (const char *)Pico.rom + rom_offset;\r |
1dceadae |
538 | for (i = 0; i < len; i++)\r |
1f4e9f14 |
539 | if (s1[i] != s_rom[i^1])\r |
1dceadae |
540 | return 1;\r |
541 | return 0;\r |
542 | }\r |
543 | \r |
1f4e9f14 |
544 | static int name_cmp(const char *name)\r |
545 | {\r |
546 | return rom_strcmp(0x150, name);\r |
547 | }\r |
548 | \r |
a12b1b29 |
549 | /*\r |
550 | * various cart-specific things, which can't be handled by generic code\r |
551 | * (maybe I should start using CRC for this stuff?)\r |
552 | */\r |
1dceadae |
553 | void PicoCartDetect(void)\r |
554 | {\r |
555 | int sram_size = 0, csum;\r |
556 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
557 | Pico.m.sram_reg = 0;\r |
558 | \r |
559 | csum = PicoRead32(0x18c) & 0xffff;\r |
560 | \r |
561 | if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r |
562 | {\r |
563 | if (Pico.rom[0x1B2] & 0x40)\r |
564 | {\r |
565 | // EEPROM\r |
566 | SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r |
567 | SRam.end = PicoRead32(0x1B8);\r |
568 | sram_size = 0x2000;\r |
569 | Pico.m.sram_reg |= 4;\r |
570 | } else {\r |
571 | // normal SRAM\r |
53668ca0 |
572 | SRam.start = PicoRead32(0x1B4) & ~0xff;\r |
1dceadae |
573 | SRam.end = PicoRead32(0x1B8) | 1;\r |
574 | sram_size = SRam.end - SRam.start + 1;\r |
575 | }\r |
53668ca0 |
576 | SRam.start &= ~0xff000000;\r |
577 | SRam.end &= ~0xff000000;\r |
1dceadae |
578 | Pico.m.sram_reg |= 0x10; // SRAM was detected\r |
579 | }\r |
580 | if (sram_size <= 0)\r |
581 | {\r |
582 | // some games may have bad headers, like S&K and Sonic3\r |
583 | // note: majority games use 0x200000 as starting address, but there are some which\r |
584 | // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r |
585 | SRam.start = 0x200000;\r |
586 | SRam.end = 0x203FFF;\r |
587 | sram_size = 0x004000;\r |
588 | }\r |
589 | \r |
590 | if (sram_size)\r |
591 | {\r |
592 | SRam.data = (unsigned char *) calloc(sram_size, 1);\r |
593 | if(!SRam.data) return;\r |
594 | }\r |
595 | SRam.changed = 0;\r |
596 | \r |
597 | // set EEPROM defaults, in case it gets detected\r |
598 | SRam.eeprom_type = 0; // 7bit (24C01)\r |
599 | SRam.eeprom_abits = 3; // eeprom access must be odd addr for: bit0 ~ cl, bit1 ~ in\r |
600 | SRam.eeprom_bit_cl = 1;\r |
601 | SRam.eeprom_bit_in = 0;\r |
602 | SRam.eeprom_bit_out= 0;\r |
603 | \r |
604 | // some known EEPROM data (thanks to EkeEke)\r |
605 | if (name_cmp("COLLEGE SLAM") == 0 ||\r |
606 | name_cmp("FRANK THOMAS BIGHURT BASEBAL") == 0)\r |
607 | {\r |
608 | SRam.eeprom_type = 3;\r |
609 | SRam.eeprom_abits = 2;\r |
610 | SRam.eeprom_bit_cl = 0;\r |
611 | }\r |
612 | else if (name_cmp("NBA JAM TOURNAMENT EDITION") == 0 ||\r |
613 | name_cmp("NFL QUARTERBACK CLUB") == 0)\r |
614 | {\r |
615 | SRam.eeprom_type = 2;\r |
616 | SRam.eeprom_abits = 2;\r |
617 | SRam.eeprom_bit_cl = 0;\r |
618 | }\r |
619 | else if (name_cmp("NBA JAM") == 0)\r |
620 | {\r |
621 | SRam.eeprom_type = 2;\r |
622 | SRam.eeprom_bit_out = 1;\r |
623 | SRam.eeprom_abits = 0;\r |
624 | }\r |
625 | else if (name_cmp("NHLPA HOCKEY '93") == 0 ||\r |
626 | name_cmp("NHLPA Hockey '93") == 0 ||\r |
627 | name_cmp("RINGS OF POWER") == 0)\r |
628 | {\r |
629 | SRam.start = SRam.end = 0x200000;\r |
630 | Pico.m.sram_reg = 0x14;\r |
631 | SRam.eeprom_abits = 0;\r |
632 | SRam.eeprom_bit_cl = 6;\r |
633 | SRam.eeprom_bit_in = 7;\r |
634 | SRam.eeprom_bit_out= 7;\r |
635 | }\r |
636 | else if ( name_cmp("MICRO MACHINES II") == 0 ||\r |
637 | (name_cmp(" ") == 0 && // Micro Machines {Turbo Tournament '96, Military - It's a Blast!}\r |
71de3cd9 |
638 | (csum == 0x165e || csum == 0x168b || csum == 0xCEE0 || csum == 0x2C41)))\r |
1dceadae |
639 | {\r |
640 | SRam.start = 0x300000;\r |
641 | SRam.end = 0x380001;\r |
642 | Pico.m.sram_reg = 0x14;\r |
643 | SRam.eeprom_type = 2;\r |
644 | SRam.eeprom_abits = 0;\r |
645 | SRam.eeprom_bit_cl = 1;\r |
646 | SRam.eeprom_bit_in = 0;\r |
647 | SRam.eeprom_bit_out= 7;\r |
648 | }\r |
649 | \r |
757f8dae |
650 | // SVP detection\r |
651 | else if (name_cmp("Virtua Racing") == 0 ||\r |
652 | name_cmp("VIRTUA RACING") == 0)\r |
653 | {\r |
654 | PicoSVPStartup();\r |
655 | }\r |
656 | \r |
a12b1b29 |
657 | // Detect 12-in-1 mapper\r |
1ca2ea4f |
658 | else if ((name_cmp("ROBOCOP 3") == 0 && Pico.romsize == 0x200000) ||\r |
659 | (rom_strcmp(0x160, "FLICKY") == 0 && Pico.romsize >= 0x200000))\r |
757f8dae |
660 | {\r |
661 | carthw_12in1_startup();\r |
662 | }\r |
663 | \r |
a12b1b29 |
664 | // Realtec mapper\r |
665 | else if (Pico.romsize == 512*1024 && (\r |
1ca2ea4f |
666 | rom_strcmp(0x94, "THE EARTH DEFEND") == 0 ||\r |
667 | rom_strcmp(0xfe, "WISEGAME 11-03-1993") == 0 || // Funny World\r |
668 | rom_strcmp(0x95, "MALLET LEGEND ") == 0)) // Whac-A-Critter\r |
a12b1b29 |
669 | {\r |
670 | carthw_realtec_startup();\r |
671 | }\r |
672 | \r |
1dceadae |
673 | // Some games malfunction if SRAM is not filled with 0xff\r |
674 | if (name_cmp("DINO DINI'S SOCCER") == 0 ||\r |
675 | name_cmp("MICRO MACHINES II") == 0)\r |
757f8dae |
676 | {\r |
1dceadae |
677 | memset(SRam.data, 0xff, sram_size);\r |
757f8dae |
678 | }\r |
1f4e9f14 |
679 | \r |
680 | // Unusual region 'code'\r |
681 | if (rom_strcmp(0x1f0, "EUROPE") == 0)\r |
682 | *(int *) (Pico.rom+0x1f0) = 0x20204520;\r |
1dceadae |
683 | }\r |
684 | \r |