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 |
efcba75f |
10 | #include "pico_int.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 |
3e49ffd0 |
16 | static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };\r |
83bd0b76 |
17 | \r |
e807ac75 |
18 | void (*PicoCartUnloadHook)(void) = NULL;\r |
19 | \r |
a9b3ffd3 |
20 | void (*PicoCartLoadProgressCB)(int percent) = NULL;\r |
b2451ac6 |
21 | void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c\r |
a9b3ffd3 |
22 | \r |
d6114368 |
23 | static void PicoCartDetect(void);\r |
24 | \r |
71de3cd9 |
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 |
83bd0b76 |
73 | \r |
87b0845f |
74 | static const char *get_ext(const char *path)\r |
75 | {\r |
76 | const char *ext;\r |
77 | if (strlen(path) < 4)\r |
78 | return ""; // no ext\r |
79 | \r |
80 | // allow 2 or 3 char extensions for now\r |
81 | ext = path + strlen(path) - 2;\r |
82 | if (ext[-1] != '.') ext--;\r |
83 | if (ext[-1] != '.')\r |
84 | return "";\r |
85 | return ext;\r |
86 | }\r |
87 | \r |
83bd0b76 |
88 | pm_file *pm_open(const char *path)\r |
89 | {\r |
90 | pm_file *file = NULL;\r |
91 | const char *ext;\r |
92 | FILE *f;\r |
93 | \r |
87b0845f |
94 | if (path == NULL)\r |
95 | return NULL;\r |
83bd0b76 |
96 | \r |
87b0845f |
97 | ext = get_ext(path);\r |
98 | if (strcasecmp(ext, "zip") == 0)\r |
83bd0b76 |
99 | {\r |
100 | struct zipent *zipentry;\r |
101 | gzFile gzf = NULL;\r |
102 | ZIP *zipfile;\r |
103 | int i;\r |
104 | \r |
105 | zipfile = openzip(path);\r |
83bd0b76 |
106 | if (zipfile != NULL)\r |
107 | {\r |
108 | /* search for suitable file (right extension or large enough file) */\r |
109 | while ((zipentry = readzip(zipfile)) != NULL)\r |
110 | {\r |
87b0845f |
111 | ext = get_ext(zipentry->name);\r |
83bd0b76 |
112 | \r |
87b0845f |
113 | if (zipentry->uncompressed_size >= 32*1024)\r |
114 | goto found_rom_zip;\r |
3e49ffd0 |
115 | \r |
83bd0b76 |
116 | for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)\r |
87b0845f |
117 | if (strcasecmp(ext, rom_exts[i]) == 0)\r |
118 | goto found_rom_zip;\r |
83bd0b76 |
119 | }\r |
120 | \r |
121 | /* zipfile given, but nothing found suitable for us inside */\r |
122 | goto zip_failed;\r |
123 | \r |
124 | found_rom_zip:\r |
125 | /* try to convert to gzip stream, so we could use standard gzio functions from zlib */\r |
126 | gzf = zip2gz(zipfile, zipentry);\r |
127 | if (gzf == NULL) goto zip_failed;\r |
128 | \r |
87b0845f |
129 | file = calloc(1, sizeof(*file));\r |
83bd0b76 |
130 | if (file == NULL) goto zip_failed;\r |
131 | file->file = zipfile;\r |
132 | file->param = gzf;\r |
133 | file->size = zipentry->uncompressed_size;\r |
134 | file->type = PMT_ZIP;\r |
87b0845f |
135 | strncpy(file->ext, ext, sizeof(file->ext) - 1);\r |
83bd0b76 |
136 | return file;\r |
137 | \r |
138 | zip_failed:\r |
139 | if (gzf) {\r |
140 | gzclose(gzf);\r |
141 | zipfile->fp = NULL; // gzclose() closed it\r |
142 | }\r |
143 | closezip(zipfile);\r |
144 | return NULL;\r |
145 | }\r |
146 | }\r |
87b0845f |
147 | else if (strcasecmp(ext, "cso") == 0)\r |
71de3cd9 |
148 | {\r |
149 | cso_struct *cso = NULL, *tmp = NULL;\r |
150 | int size;\r |
151 | f = fopen(path, "rb");\r |
152 | if (f == NULL)\r |
153 | goto cso_failed;\r |
154 | \r |
f8af9634 |
155 | #ifndef __EPOC32__\r |
2d2247c2 |
156 | /* we use our own buffering */\r |
157 | setvbuf(f, NULL, _IONBF, 0);\r |
f8af9634 |
158 | #endif\r |
2d2247c2 |
159 | \r |
71de3cd9 |
160 | cso = malloc(sizeof(*cso));\r |
161 | if (cso == NULL)\r |
162 | goto cso_failed;\r |
163 | \r |
164 | if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))\r |
165 | goto cso_failed;\r |
166 | \r |
167 | if (strncmp(cso->header.magic, "CISO", 4) != 0) {\r |
168 | elprintf(EL_STATUS, "cso: bad header");\r |
169 | goto cso_failed;\r |
170 | }\r |
171 | \r |
172 | if (cso->header.block_size != 2048) {\r |
173 | elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);\r |
174 | goto cso_failed;\r |
175 | }\r |
176 | \r |
177 | size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);\r |
178 | tmp = realloc(cso, size);\r |
179 | if (tmp == NULL)\r |
180 | goto cso_failed;\r |
181 | cso = tmp;\r |
182 | elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);\r |
183 | \r |
184 | size -= sizeof(*cso); // index size\r |
185 | if (fread(cso->index, 1, size, f) != size) {\r |
186 | elprintf(EL_STATUS, "cso: premature EOF");\r |
187 | goto cso_failed;\r |
188 | }\r |
189 | \r |
190 | // all ok\r |
191 | cso->fpos_in = ftell(f);\r |
192 | cso->fpos_out = 0;\r |
193 | cso->block_in_buff = -1;\r |
87b0845f |
194 | file = calloc(1, sizeof(*file));\r |
71de3cd9 |
195 | if (file == NULL) goto cso_failed;\r |
196 | file->file = f;\r |
197 | file->param = cso;\r |
198 | file->size = cso->header.total_bytes;\r |
199 | file->type = PMT_CSO;\r |
200 | return file;\r |
201 | \r |
202 | cso_failed:\r |
203 | if (cso != NULL) free(cso);\r |
204 | if (f != NULL) fclose(f);\r |
205 | return NULL;\r |
206 | }\r |
83bd0b76 |
207 | \r |
208 | /* not a zip, treat as uncompressed file */\r |
209 | f = fopen(path, "rb");\r |
210 | if (f == NULL) return NULL;\r |
211 | \r |
87b0845f |
212 | file = calloc(1, sizeof(*file));\r |
83bd0b76 |
213 | if (file == NULL) {\r |
214 | fclose(f);\r |
215 | return NULL;\r |
216 | }\r |
217 | fseek(f, 0, SEEK_END);\r |
218 | file->file = f;\r |
219 | file->param = NULL;\r |
220 | file->size = ftell(f);\r |
221 | file->type = PMT_UNCOMPRESSED;\r |
87b0845f |
222 | strncpy(file->ext, ext, sizeof(file->ext) - 1);\r |
83bd0b76 |
223 | fseek(f, 0, SEEK_SET);\r |
d6114368 |
224 | \r |
f8af9634 |
225 | #ifndef __EPOC32__ // makes things worse on Symbian\r |
226 | if (file->size > 0x400000)\r |
227 | /* we use our own buffering */\r |
228 | setvbuf(f, NULL, _IONBF, 0);\r |
229 | #endif\r |
230 | \r |
83bd0b76 |
231 | return file;\r |
232 | }\r |
233 | \r |
234 | size_t pm_read(void *ptr, size_t bytes, pm_file *stream)\r |
235 | {\r |
236 | int ret;\r |
237 | \r |
238 | if (stream->type == PMT_UNCOMPRESSED)\r |
239 | {\r |
240 | ret = fread(ptr, 1, bytes, stream->file);\r |
241 | }\r |
242 | else if (stream->type == PMT_ZIP)\r |
243 | {\r |
244 | gzFile gf = stream->param;\r |
245 | int err;\r |
246 | ret = gzread(gf, ptr, bytes);\r |
247 | err = gzerror2(gf);\r |
248 | if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))\r |
249 | /* we must reset stream pointer or else next seek/read fails */\r |
250 | gzrewind(gf);\r |
251 | }\r |
71de3cd9 |
252 | else if (stream->type == PMT_CSO)\r |
253 | {\r |
254 | cso_struct *cso = stream->param;\r |
255 | int read_pos, read_len, out_offs, rret;\r |
256 | int block = cso->fpos_out >> 11;\r |
257 | int index = cso->index[block];\r |
258 | int index_end = cso->index[block+1];\r |
259 | unsigned char *out = ptr, *tmp_dst;\r |
260 | \r |
261 | ret = 0;\r |
262 | while (bytes != 0)\r |
263 | {\r |
264 | out_offs = cso->fpos_out&0x7ff;\r |
265 | if (out_offs == 0 && bytes >= 2048)\r |
266 | tmp_dst = out;\r |
267 | else tmp_dst = cso->out_buff;\r |
268 | \r |
269 | read_pos = (index&0x7fffffff) << cso->header.align;\r |
270 | \r |
271 | if (index < 0) {\r |
272 | if (read_pos != cso->fpos_in)\r |
273 | fseek(stream->file, read_pos, SEEK_SET);\r |
274 | rret = fread(tmp_dst, 1, 2048, stream->file);\r |
275 | cso->fpos_in = read_pos + rret;\r |
276 | if (rret != 2048) break;\r |
277 | } else {\r |
278 | read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;\r |
279 | if (block != cso->block_in_buff)\r |
280 | {\r |
281 | if (read_pos != cso->fpos_in)\r |
ff6b7429 |
282 | fseek(stream->file, read_pos, SEEK_SET);\r |
71de3cd9 |
283 | rret = fread(cso->in_buff, 1, read_len, stream->file);\r |
284 | cso->fpos_in = read_pos + rret;\r |
285 | if (rret != read_len) {\r |
286 | elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);\r |
287 | break;\r |
288 | }\r |
289 | cso->block_in_buff = block;\r |
290 | }\r |
291 | rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);\r |
292 | if (rret != 0) {\r |
293 | elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);\r |
294 | break;\r |
295 | }\r |
296 | }\r |
297 | \r |
298 | rret = 2048;\r |
299 | if (out_offs != 0 || bytes < 2048) {\r |
300 | //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);\r |
301 | if (bytes < rret) rret = bytes;\r |
302 | if (2048 - out_offs < rret) rret = 2048 - out_offs;\r |
303 | memcpy(out, tmp_dst + out_offs, rret);\r |
304 | }\r |
305 | ret += rret;\r |
306 | out += rret;\r |
307 | cso->fpos_out += rret;\r |
308 | bytes -= rret;\r |
309 | block++;\r |
310 | index = index_end;\r |
311 | index_end = cso->index[block+1];\r |
312 | }\r |
313 | }\r |
83bd0b76 |
314 | else\r |
315 | ret = 0;\r |
316 | \r |
317 | return ret;\r |
318 | }\r |
319 | \r |
320 | int pm_seek(pm_file *stream, long offset, int whence)\r |
321 | {\r |
322 | if (stream->type == PMT_UNCOMPRESSED)\r |
323 | {\r |
7336a99a |
324 | fseek(stream->file, offset, whence);\r |
325 | return ftell(stream->file);\r |
83bd0b76 |
326 | }\r |
327 | else if (stream->type == PMT_ZIP)\r |
328 | {\r |
66fdc0f0 |
329 | if (PicoMessage != NULL && offset > 6*1024*1024) {\r |
330 | long pos = gztell((gzFile) stream->param);\r |
331 | if (offset < pos || offset - pos > 6*1024*1024)\r |
332 | PicoMessage("Decompressing data...");\r |
333 | }\r |
83bd0b76 |
334 | return gzseek((gzFile) stream->param, offset, whence);\r |
335 | }\r |
71de3cd9 |
336 | else if (stream->type == PMT_CSO)\r |
337 | {\r |
338 | cso_struct *cso = stream->param;\r |
339 | switch (whence)\r |
340 | {\r |
341 | case SEEK_CUR: cso->fpos_out += offset; break;\r |
342 | case SEEK_SET: cso->fpos_out = offset; break;\r |
343 | case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;\r |
344 | }\r |
345 | return cso->fpos_out;\r |
346 | }\r |
83bd0b76 |
347 | else\r |
348 | return -1;\r |
349 | }\r |
350 | \r |
351 | int pm_close(pm_file *fp)\r |
352 | {\r |
353 | int ret = 0;\r |
354 | \r |
355 | if (fp == NULL) return EOF;\r |
356 | \r |
357 | if (fp->type == PMT_UNCOMPRESSED)\r |
358 | {\r |
359 | fclose(fp->file);\r |
360 | }\r |
361 | else if (fp->type == PMT_ZIP)\r |
362 | {\r |
363 | ZIP *zipfile = fp->file;\r |
364 | gzclose((gzFile) fp->param);\r |
365 | zipfile->fp = NULL; // gzclose() closed it\r |
366 | closezip(zipfile);\r |
367 | }\r |
71de3cd9 |
368 | else if (fp->type == PMT_CSO)\r |
369 | {\r |
370 | free(fp->param);\r |
371 | fclose(fp->file);\r |
372 | }\r |
83bd0b76 |
373 | else\r |
374 | ret = EOF;\r |
375 | \r |
376 | free(fp);\r |
377 | return ret;\r |
378 | }\r |
379 | \r |
cc68a136 |
380 | \r |
381 | void Byteswap(unsigned char *data,int len)\r |
382 | {\r |
383 | int i=0;\r |
384 | \r |
385 | if (len<2) return; // Too short\r |
386 | \r |
387 | do\r |
388 | {\r |
389 | unsigned short *pd=(unsigned short *)(data+i);\r |
390 | int value=*pd; // Get 2 bytes\r |
391 | \r |
392 | value=(value<<8)|(value>>8); // Byteswap it\r |
393 | *pd=(unsigned short)value; // Put 2b ytes\r |
394 | i+=2;\r |
395 | }\r |
396 | while (i+2<=len);\r |
397 | }\r |
398 | \r |
399 | // Interleve a 16k block and byteswap\r |
400 | static int InterleveBlock(unsigned char *dest,unsigned char *src)\r |
401 | {\r |
402 | int i=0;\r |
403 | for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd\r |
404 | for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even\r |
405 | return 0;\r |
406 | }\r |
407 | \r |
408 | // Decode a SMD file\r |
409 | static int DecodeSmd(unsigned char *data,int len)\r |
410 | {\r |
411 | unsigned char *temp=NULL;\r |
412 | int i=0;\r |
413 | \r |
414 | temp=(unsigned char *)malloc(0x4000);\r |
415 | if (temp==NULL) return 1;\r |
416 | memset(temp,0,0x4000);\r |
417 | \r |
418 | // Interleve each 16k block and shift down by 0x200:\r |
419 | for (i=0; i+0x4200<=len; i+=0x4000)\r |
420 | {\r |
421 | InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer\r |
422 | memcpy(data+i,temp,0x4000); // Copy back in\r |
423 | }\r |
424 | \r |
425 | free(temp);\r |
426 | return 0;\r |
427 | }\r |
428 | \r |
bf098bc5 |
429 | static unsigned char *cd_realloc(void *old, int filesize)\r |
430 | {\r |
431 | unsigned char *rom;\r |
bf098bc5 |
432 | rom=realloc(old, sizeof(mcd_state));\r |
433 | if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);\r |
434 | return rom;\r |
435 | }\r |
436 | \r |
87b0845f |
437 | static unsigned char *PicoCartAlloc(int filesize, int is_sms)\r |
cc68a136 |
438 | {\r |
439 | int alloc_size;\r |
440 | unsigned char *rom;\r |
441 | \r |
87b0845f |
442 | if (PicoAHW & PAHW_MCD)\r |
443 | return cd_realloc(NULL, filesize);\r |
444 | \r |
445 | if (is_sms) {\r |
446 | // make size power of 2 for easier banking handling\r |
447 | int s = 0, tmp = filesize;\r |
448 | while ((tmp >>= 1) != 0)\r |
449 | s++;\r |
450 | if (filesize > (1 << s))\r |
451 | s++;\r |
452 | alloc_size = 1 << s;\r |
453 | }\r |
454 | else {\r |
455 | // align to 512K for memhandlers\r |
456 | alloc_size = (filesize + 0x7ffff) & ~0x7ffff;\r |
457 | }\r |
cc68a136 |
458 | \r |
87b0845f |
459 | if (alloc_size - filesize < 4)\r |
460 | alloc_size += 4; // padding for out-of-bound exec protection\r |
cc68a136 |
461 | \r |
462 | // Allocate space for the rom plus padding\r |
87b0845f |
463 | rom = calloc(alloc_size, 1);\r |
cc68a136 |
464 | return rom;\r |
465 | }\r |
466 | \r |
3e49ffd0 |
467 | int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)\r |
cc68a136 |
468 | {\r |
87b0845f |
469 | unsigned char *rom;\r |
470 | int size, bytes_read;\r |
cc68a136 |
471 | \r |
87b0845f |
472 | if (f == NULL)\r |
473 | return 1;\r |
474 | \r |
475 | size = f->size;\r |
cc68a136 |
476 | if (size <= 0) return 1;\r |
87b0845f |
477 | size = (size+3)&~3; // Round up to a multiple of 4\r |
cc68a136 |
478 | \r |
479 | // Allocate space for the rom plus padding\r |
87b0845f |
480 | rom = PicoCartAlloc(size, is_sms);\r |
481 | if (rom == NULL) {\r |
c6196c0f |
482 | elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r |
f8af9634 |
483 | return 2;\r |
7336a99a |
484 | }\r |
cc68a136 |
485 | \r |
a9b3ffd3 |
486 | if (PicoCartLoadProgressCB != NULL)\r |
487 | {\r |
488 | // read ROM in blocks, just for fun\r |
489 | int ret;\r |
490 | unsigned char *p = rom;\r |
491 | bytes_read=0;\r |
492 | do\r |
493 | {\r |
494 | int todo = size - bytes_read;\r |
495 | if (todo > 256*1024) todo = 256*1024;\r |
496 | ret = pm_read(p,todo,f);\r |
497 | bytes_read += ret;\r |
498 | p += ret;\r |
499 | PicoCartLoadProgressCB(bytes_read * 100 / size);\r |
500 | }\r |
501 | while (ret > 0);\r |
502 | }\r |
503 | else\r |
504 | bytes_read = pm_read(rom,size,f); // Load up the rom\r |
505 | if (bytes_read <= 0) {\r |
c6196c0f |
506 | elprintf(EL_STATUS, "read failed");\r |
a9b3ffd3 |
507 | free(rom);\r |
f8af9634 |
508 | return 3;\r |
a9b3ffd3 |
509 | }\r |
bf098bc5 |
510 | \r |
3e49ffd0 |
511 | if (!is_sms)\r |
512 | {\r |
513 | // maybe we are loading MegaCD BIOS?\r |
514 | if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||\r |
515 | !strncmp((char *)rom+0x128, "BOOT", 4))) {\r |
516 | PicoAHW |= PAHW_MCD;\r |
517 | rom = cd_realloc(rom, size);\r |
518 | }\r |
cc68a136 |
519 | \r |
3e49ffd0 |
520 | // Check for SMD:\r |
87b0845f |
521 | if (size >= 0x4200 && (size&0x3fff) == 0x200 &&\r |
3e49ffd0 |
522 | ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {\r |
87b0845f |
523 | elprintf(EL_STATUS, "SMD format detected.");\r |
3e49ffd0 |
524 | DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD\r |
525 | }\r |
526 | else Byteswap(rom,size); // Just byteswap\r |
21395e38 |
527 | }\r |
87b0845f |
528 | else\r |
529 | {\r |
530 | if (size >= 0x4200 && (size&0x3fff) == 0x200) {\r |
531 | elprintf(EL_STATUS, "SMD format detected.");\r |
532 | // at least here it's not interleaved\r |
533 | size -= 0x200;\r |
534 | memmove(rom, rom + 0x200, size);\r |
535 | }\r |
536 | }\r |
cc68a136 |
537 | \r |
87b0845f |
538 | if (prom) *prom = rom;\r |
539 | if (psize) *psize = size;\r |
cc68a136 |
540 | \r |
541 | return 0;\r |
542 | }\r |
543 | \r |
f8ef8ff7 |
544 | // Insert a cartridge:\r |
cc68a136 |
545 | int PicoCartInsert(unsigned char *rom,unsigned int romsize)\r |
546 | {\r |
547 | // notaz: add a 68k "jump one op back" opcode to the end of ROM.\r |
548 | // This will hang the emu, but will prevent nasty crashes.\r |
549 | // note: 4 bytes are padded to every ROM\r |
d6114368 |
550 | if (rom != NULL)\r |
cc68a136 |
551 | *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r |
552 | \r |
cc68a136 |
553 | Pico.rom=rom;\r |
554 | Pico.romsize=romsize;\r |
555 | \r |
d6114368 |
556 | if (SRam.data) {\r |
557 | free(SRam.data);\r |
558 | SRam.data = NULL;\r |
559 | }\r |
560 | \r |
e807ac75 |
561 | if (PicoCartUnloadHook != NULL) {\r |
562 | PicoCartUnloadHook();\r |
563 | PicoCartUnloadHook = NULL;\r |
564 | }\r |
565 | \r |
3e49ffd0 |
566 | PicoAHW &= PAHW_MCD|PAHW_SMS;\r |
602133e1 |
567 | \r |
f8ef8ff7 |
568 | PicoMemResetHooks();\r |
569 | PicoDmaHook = NULL;\r |
570 | PicoResetHook = NULL;\r |
017512f2 |
571 | PicoLineHook = NULL;\r |
fad24893 |
572 | PicoLoadStateHook = NULL;\r |
945c2fdc |
573 | carthw_chunks = NULL;\r |
f8ef8ff7 |
574 | \r |
0ffefdb8 |
575 | PicoMemReset();\r |
576 | \r |
3e49ffd0 |
577 | if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))\r |
f8ef8ff7 |
578 | PicoCartDetect();\r |
579 | \r |
1dceadae |
580 | // setup correct memory map for loaded ROM\r |
0ffefdb8 |
581 | // call PicoMemReset again due to possible memmap change\r |
9037e45d |
582 | switch (PicoAHW) {\r |
583 | default:\r |
584 | elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);\r |
585 | case 0:\r |
586 | case PAHW_SVP: PicoMemSetup(); break;\r |
587 | case PAHW_MCD: PicoMemSetupCD(); break;\r |
588 | case PAHW_PICO: PicoMemSetupPico(); break;\r |
3e49ffd0 |
589 | case PAHW_SMS: PicoMemSetupMS(); break;\r |
9037e45d |
590 | }\r |
1dceadae |
591 | PicoMemReset();\r |
592 | \r |
3e49ffd0 |
593 | if (PicoAHW & PAHW_SMS)\r |
594 | PicoPowerMS();\r |
595 | else\r |
596 | PicoPower();\r |
597 | \r |
1cb1584b |
598 | return 0;\r |
cc68a136 |
599 | }\r |
600 | \r |
2aa27095 |
601 | void PicoCartUnload(void)\r |
cc68a136 |
602 | {\r |
3e49ffd0 |
603 | if (PicoCartUnloadHook != NULL) {\r |
604 | PicoCartUnloadHook();\r |
605 | PicoCartUnloadHook = NULL;\r |
606 | }\r |
607 | \r |
a12b1b29 |
608 | if (Pico.rom != NULL) {\r |
053fd9b4 |
609 | SekFinishIdleDet();\r |
a12b1b29 |
610 | free(Pico.rom);\r |
611 | Pico.rom=NULL;\r |
612 | }\r |
cc68a136 |
613 | }\r |
614 | \r |
1f4e9f14 |
615 | static int rom_strcmp(int rom_offset, const char *s1)\r |
1dceadae |
616 | {\r |
1f4e9f14 |
617 | int i, len = strlen(s1);\r |
618 | const char *s_rom = (const char *)Pico.rom + rom_offset;\r |
1dceadae |
619 | for (i = 0; i < len; i++)\r |
1f4e9f14 |
620 | if (s1[i] != s_rom[i^1])\r |
1dceadae |
621 | return 1;\r |
622 | return 0;\r |
623 | }\r |
624 | \r |
1f4e9f14 |
625 | static int name_cmp(const char *name)\r |
626 | {\r |
627 | return rom_strcmp(0x150, name);\r |
628 | }\r |
629 | \r |
a12b1b29 |
630 | /*\r |
631 | * various cart-specific things, which can't be handled by generic code\r |
632 | * (maybe I should start using CRC for this stuff?)\r |
633 | */\r |
d6114368 |
634 | static void PicoCartDetect(void)\r |
1dceadae |
635 | {\r |
636 | int sram_size = 0, csum;\r |
1dceadae |
637 | Pico.m.sram_reg = 0;\r |
638 | \r |
639 | csum = PicoRead32(0x18c) & 0xffff;\r |
640 | \r |
641 | if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r |
642 | {\r |
643 | if (Pico.rom[0x1B2] & 0x40)\r |
644 | {\r |
645 | // EEPROM\r |
646 | SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r |
647 | SRam.end = PicoRead32(0x1B8);\r |
648 | sram_size = 0x2000;\r |
649 | Pico.m.sram_reg |= 4;\r |
650 | } else {\r |
651 | // normal SRAM\r |
53668ca0 |
652 | SRam.start = PicoRead32(0x1B4) & ~0xff;\r |
1dceadae |
653 | SRam.end = PicoRead32(0x1B8) | 1;\r |
654 | sram_size = SRam.end - SRam.start + 1;\r |
655 | }\r |
53668ca0 |
656 | SRam.start &= ~0xff000000;\r |
657 | SRam.end &= ~0xff000000;\r |
1dceadae |
658 | Pico.m.sram_reg |= 0x10; // SRAM was detected\r |
659 | }\r |
660 | if (sram_size <= 0)\r |
661 | {\r |
662 | // some games may have bad headers, like S&K and Sonic3\r |
663 | // note: majority games use 0x200000 as starting address, but there are some which\r |
664 | // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r |
665 | SRam.start = 0x200000;\r |
666 | SRam.end = 0x203FFF;\r |
667 | sram_size = 0x004000;\r |
668 | }\r |
669 | \r |
1cb1584b |
670 | // this game actually doesn't have SRAM, but some weird protection\r |
671 | if (rom_strcmp(0x120, "PUGGSY") == 0)\r |
672 | {\r |
673 | SRam.start = SRam.end = sram_size = 0;\r |
674 | }\r |
675 | \r |
1dceadae |
676 | if (sram_size)\r |
677 | {\r |
678 | SRam.data = (unsigned char *) calloc(sram_size, 1);\r |
d6114368 |
679 | if (SRam.data == NULL) return;\r |
1dceadae |
680 | }\r |
681 | SRam.changed = 0;\r |
682 | \r |
683 | // set EEPROM defaults, in case it gets detected\r |
684 | SRam.eeprom_type = 0; // 7bit (24C01)\r |
685 | SRam.eeprom_abits = 3; // eeprom access must be odd addr for: bit0 ~ cl, bit1 ~ in\r |
686 | SRam.eeprom_bit_cl = 1;\r |
687 | SRam.eeprom_bit_in = 0;\r |
688 | SRam.eeprom_bit_out= 0;\r |
689 | \r |
690 | // some known EEPROM data (thanks to EkeEke)\r |
691 | if (name_cmp("COLLEGE SLAM") == 0 ||\r |
692 | name_cmp("FRANK THOMAS BIGHURT BASEBAL") == 0)\r |
693 | {\r |
694 | SRam.eeprom_type = 3;\r |
695 | SRam.eeprom_abits = 2;\r |
696 | SRam.eeprom_bit_cl = 0;\r |
697 | }\r |
698 | else if (name_cmp("NBA JAM TOURNAMENT EDITION") == 0 ||\r |
699 | name_cmp("NFL QUARTERBACK CLUB") == 0)\r |
700 | {\r |
701 | SRam.eeprom_type = 2;\r |
702 | SRam.eeprom_abits = 2;\r |
703 | SRam.eeprom_bit_cl = 0;\r |
704 | }\r |
705 | else if (name_cmp("NBA JAM") == 0)\r |
706 | {\r |
707 | SRam.eeprom_type = 2;\r |
708 | SRam.eeprom_bit_out = 1;\r |
709 | SRam.eeprom_abits = 0;\r |
710 | }\r |
711 | else if (name_cmp("NHLPA HOCKEY '93") == 0 ||\r |
712 | name_cmp("NHLPA Hockey '93") == 0 ||\r |
713 | name_cmp("RINGS OF POWER") == 0)\r |
714 | {\r |
715 | SRam.start = SRam.end = 0x200000;\r |
716 | Pico.m.sram_reg = 0x14;\r |
717 | SRam.eeprom_abits = 0;\r |
718 | SRam.eeprom_bit_cl = 6;\r |
719 | SRam.eeprom_bit_in = 7;\r |
720 | SRam.eeprom_bit_out= 7;\r |
721 | }\r |
722 | else if ( name_cmp("MICRO MACHINES II") == 0 ||\r |
723 | (name_cmp(" ") == 0 && // Micro Machines {Turbo Tournament '96, Military - It's a Blast!}\r |
71de3cd9 |
724 | (csum == 0x165e || csum == 0x168b || csum == 0xCEE0 || csum == 0x2C41)))\r |
1dceadae |
725 | {\r |
726 | SRam.start = 0x300000;\r |
727 | SRam.end = 0x380001;\r |
728 | Pico.m.sram_reg = 0x14;\r |
729 | SRam.eeprom_type = 2;\r |
730 | SRam.eeprom_abits = 0;\r |
731 | SRam.eeprom_bit_cl = 1;\r |
732 | SRam.eeprom_bit_in = 0;\r |
733 | SRam.eeprom_bit_out= 7;\r |
734 | }\r |
735 | \r |
757f8dae |
736 | // SVP detection\r |
737 | else if (name_cmp("Virtua Racing") == 0 ||\r |
738 | name_cmp("VIRTUA RACING") == 0)\r |
739 | {\r |
740 | PicoSVPStartup();\r |
741 | }\r |
742 | \r |
9037e45d |
743 | // Pico\r |
744 | else if (rom_strcmp(0x100, "SEGA PICO") == 0 ||\r |
745 | rom_strcmp(0x100, "IMA IKUNOUJYUKU") == 0) // what is that supposed to mean?\r |
746 | {\r |
747 | PicoInitPico();\r |
748 | }\r |
749 | \r |
a12b1b29 |
750 | // Detect 12-in-1 mapper\r |
1ca2ea4f |
751 | else if ((name_cmp("ROBOCOP 3") == 0 && Pico.romsize == 0x200000) ||\r |
3d48ce71 |
752 | (rom_strcmp(0x160, "FLICKY") == 0 && Pico.romsize >= 0x200000) ||\r |
753 | (name_cmp(" SHOVE IT!") == 0 && Pico.romsize >= 0x200000) ||\r |
672ee5ee |
754 | (name_cmp("MS PACMAN") == 0 && Pico.romsize >= 0x200000) || // bad dump?\r |
755 | (name_cmp("ALIEN 3") == 0 && Pico.romsize == 0x200000))\r |
757f8dae |
756 | {\r |
757 | carthw_12in1_startup();\r |
758 | }\r |
759 | \r |
a12b1b29 |
760 | // Realtec mapper\r |
761 | else if (Pico.romsize == 512*1024 && (\r |
1ca2ea4f |
762 | rom_strcmp(0x94, "THE EARTH DEFEND") == 0 ||\r |
763 | rom_strcmp(0xfe, "WISEGAME 11-03-1993") == 0 || // Funny World\r |
764 | rom_strcmp(0x95, "MALLET LEGEND ") == 0)) // Whac-A-Critter\r |
a12b1b29 |
765 | {\r |
766 | carthw_realtec_startup();\r |
767 | }\r |
768 | \r |
0b35350d |
769 | // Radica mapper\r |
770 | else if (name_cmp("KID CHAMELEON") == 0 && Pico.romsize > 0x100000)\r |
771 | {\r |
772 | carthw_radica_startup();\r |
773 | }\r |
774 | \r |
1dceadae |
775 | // Some games malfunction if SRAM is not filled with 0xff\r |
776 | if (name_cmp("DINO DINI'S SOCCER") == 0 ||\r |
777 | name_cmp("MICRO MACHINES II") == 0)\r |
757f8dae |
778 | {\r |
1dceadae |
779 | memset(SRam.data, 0xff, sram_size);\r |
757f8dae |
780 | }\r |
1f4e9f14 |
781 | \r |
782 | // Unusual region 'code'\r |
453d2a6e |
783 | if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r |
1f4e9f14 |
784 | *(int *) (Pico.rom+0x1f0) = 0x20204520;\r |
1dceadae |
785 | }\r |
786 | \r |