3 * (c) Copyright Dave, 2004
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4 * (C) notaz, 2006-2010
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6 * This work is licensed under the terms of MAME license.
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7 * See COPYING file in the top-level directory.
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10 #include "pico_int.h"
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11 #include "../cpu/debug.h"
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12 #include "../unzip/unzip.h"
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16 static int rom_alloc_size;
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17 static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };
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19 void (*PicoCartUnloadHook)(void);
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20 void (*PicoCartMemSetup)(void);
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22 void (*PicoCartLoadProgressCB)(int percent) = NULL;
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23 void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c
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27 static void PicoCartDetect(const char *carthw_cfg);
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30 typedef struct _cso_struct
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32 unsigned char in_buff[2*2048];
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33 unsigned char out_buff[2048];
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36 unsigned int unused;
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37 unsigned int total_bytes;
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38 unsigned int total_bytes_high; // ignored here
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39 unsigned int block_size; // 10h
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41 unsigned char align;
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42 unsigned char reserved[2];
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44 unsigned int fpos_in; // input file read pointer
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45 unsigned int fpos_out; // pos in virtual decompressed file
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46 int block_in_buff; // block which we have read in in_buff
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52 static int uncompress_buf(void *dest, int destLen, void *source, int sourceLen)
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57 stream.next_in = (Bytef*)source;
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58 stream.avail_in = (uInt)sourceLen;
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59 stream.next_out = dest;
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60 stream.avail_out = (uInt)destLen;
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62 stream.zalloc = NULL;
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63 stream.zfree = NULL;
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65 err = inflateInit2(&stream, -15);
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66 if (err != Z_OK) return err;
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68 err = inflate(&stream, Z_FINISH);
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69 if (err != Z_STREAM_END) {
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70 inflateEnd(&stream);
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73 //*destLen = stream.total_out;
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75 return inflateEnd(&stream);
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78 static const char *get_ext(const char *path)
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81 if (strlen(path) < 4)
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82 return ""; // no ext
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84 // allow 2 or 3 char extensions for now
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85 ext = path + strlen(path) - 2;
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86 if (ext[-1] != '.') ext--;
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95 struct zipent *entry;
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97 unsigned char inbuf[16384];
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102 pm_file *pm_open(const char *path)
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104 pm_file *file = NULL;
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111 ext = get_ext(path);
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112 if (strcasecmp(ext, "zip") == 0)
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114 struct zip_file *zfile = NULL;
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115 struct zipent *zipentry;
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119 zipfile = openzip(path);
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120 if (zipfile != NULL)
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122 /* search for suitable file (right extension or large enough file) */
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123 while ((zipentry = readzip(zipfile)) != NULL)
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125 ext = get_ext(zipentry->name);
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127 if (zipentry->uncompressed_size >= 32*1024)
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128 goto found_rom_zip;
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130 for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)
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131 if (strcasecmp(ext, rom_exts[i]) == 0)
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132 goto found_rom_zip;
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135 /* zipfile given, but nothing found suitable for us inside */
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139 zfile = calloc(1, sizeof(*zfile));
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142 ret = seekcompresszip(zipfile, zipentry);
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145 ret = inflateInit2(&zfile->stream, -15);
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147 elprintf(EL_STATUS, "zip: inflateInit2 %d", ret);
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150 zfile->zip = zipfile;
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151 zfile->entry = zipentry;
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152 zfile->start = ftell(zipfile->fp);
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153 zfile->file.file = zfile;
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154 zfile->file.size = zipentry->uncompressed_size;
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155 zfile->file.type = PMT_ZIP;
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156 strncpy(zfile->file.ext, ext, sizeof(zfile->file.ext) - 1);
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157 return &zfile->file;
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165 else if (strcasecmp(ext, "cso") == 0)
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167 cso_struct *cso = NULL, *tmp = NULL;
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169 f = fopen(path, "rb");
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174 /* we use our own buffering */
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175 setvbuf(f, NULL, _IONBF, 0);
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178 cso = malloc(sizeof(*cso));
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182 if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))
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185 if (strncmp(cso->header.magic, "CISO", 4) != 0) {
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186 elprintf(EL_STATUS, "cso: bad header");
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190 if (cso->header.block_size != 2048) {
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191 elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);
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195 size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);
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196 tmp = realloc(cso, size);
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200 elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);
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202 size -= sizeof(*cso); // index size
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203 if (fread(cso->index, 1, size, f) != size) {
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204 elprintf(EL_STATUS, "cso: premature EOF");
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209 cso->fpos_in = ftell(f);
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211 cso->block_in_buff = -1;
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212 file = calloc(1, sizeof(*file));
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213 if (file == NULL) goto cso_failed;
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216 file->size = cso->header.total_bytes;
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217 file->type = PMT_CSO;
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221 if (cso != NULL) free(cso);
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222 if (f != NULL) fclose(f);
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226 /* not a zip, treat as uncompressed file */
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227 f = fopen(path, "rb");
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228 if (f == NULL) return NULL;
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230 file = calloc(1, sizeof(*file));
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231 if (file == NULL) {
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235 fseek(f, 0, SEEK_END);
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237 file->param = NULL;
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238 file->size = ftell(f);
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239 file->type = PMT_UNCOMPRESSED;
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240 strncpy(file->ext, ext, sizeof(file->ext) - 1);
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241 fseek(f, 0, SEEK_SET);
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244 if (file->size > 0x400000)
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245 /* we use our own buffering */
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246 setvbuf(f, NULL, _IONBF, 0);
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252 size_t pm_read(void *ptr, size_t bytes, pm_file *stream)
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256 if (stream->type == PMT_UNCOMPRESSED)
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258 ret = fread(ptr, 1, bytes, stream->file);
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260 else if (stream->type == PMT_ZIP)
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262 struct zip_file *z = stream->file;
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264 if (z->entry->compression_method == 0) {
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265 int ret = fread(ptr, 1, bytes, z->zip->fp);
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270 z->stream.next_out = ptr;
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271 z->stream.avail_out = bytes;
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272 while (z->stream.avail_out != 0) {
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273 if (z->stream.avail_in == 0) {
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274 z->stream.avail_in = fread(z->inbuf, 1, sizeof(z->inbuf), z->zip->fp);
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275 if (z->stream.avail_in == 0)
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277 z->stream.next_in = z->inbuf;
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279 ret = inflate(&z->stream, Z_NO_FLUSH);
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280 if (ret == Z_STREAM_END)
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283 elprintf(EL_STATUS, "zip: inflate: %d", ret);
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287 z->pos += bytes - z->stream.avail_out;
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288 return bytes - z->stream.avail_out;
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290 else if (stream->type == PMT_CSO)
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292 cso_struct *cso = stream->param;
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293 int read_pos, read_len, out_offs, rret;
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294 int block = cso->fpos_out >> 11;
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295 int index = cso->index[block];
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296 int index_end = cso->index[block+1];
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297 unsigned char *out = ptr, *tmp_dst;
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302 out_offs = cso->fpos_out&0x7ff;
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303 if (out_offs == 0 && bytes >= 2048)
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305 else tmp_dst = cso->out_buff;
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307 read_pos = (index&0x7fffffff) << cso->header.align;
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310 if (read_pos != cso->fpos_in)
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311 fseek(stream->file, read_pos, SEEK_SET);
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312 rret = fread(tmp_dst, 1, 2048, stream->file);
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313 cso->fpos_in = read_pos + rret;
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314 if (rret != 2048) break;
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316 read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;
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317 if (block != cso->block_in_buff)
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319 if (read_pos != cso->fpos_in)
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320 fseek(stream->file, read_pos, SEEK_SET);
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321 rret = fread(cso->in_buff, 1, read_len, stream->file);
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322 cso->fpos_in = read_pos + rret;
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323 if (rret != read_len) {
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324 elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);
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327 cso->block_in_buff = block;
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329 rret = uncompress_buf(tmp_dst, 2048, cso->in_buff, read_len);
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331 elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);
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337 if (out_offs != 0 || bytes < 2048) {
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338 //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);
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339 if (bytes < rret) rret = bytes;
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340 if (2048 - out_offs < rret) rret = 2048 - out_offs;
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341 memcpy(out, tmp_dst + out_offs, rret);
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345 cso->fpos_out += rret;
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349 index_end = cso->index[block+1];
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358 int pm_seek(pm_file *stream, long offset, int whence)
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360 if (stream->type == PMT_UNCOMPRESSED)
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362 fseek(stream->file, offset, whence);
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363 return ftell(stream->file);
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365 else if (stream->type == PMT_ZIP)
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367 struct zip_file *z = stream->file;
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368 unsigned int pos = z->pos;
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373 case SEEK_CUR: pos += offset; break;
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374 case SEEK_SET: pos = offset; break;
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375 case SEEK_END: pos = stream->size - offset; break;
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377 if (z->entry->compression_method == 0) {
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378 ret = fseek(z->zip->fp, z->start + pos, SEEK_SET);
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380 return (z->pos = pos);
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383 offset = pos - z->pos;
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384 if (pos < z->pos) {
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385 // full decompress from the start
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386 fseek(z->zip->fp, z->start, SEEK_SET);
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387 z->stream.avail_in = 0;
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388 z->stream.next_in = z->inbuf;
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389 inflateReset(&z->stream);
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394 if (PicoIn.osdMessage != NULL && offset > 4 * 1024 * 1024)
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395 PicoIn.osdMessage("Decompressing data...");
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397 while (offset > 0) {
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398 char buf[16 * 1024];
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399 size_t l = offset > sizeof(buf) ? sizeof(buf) : offset;
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400 ret = pm_read(buf, l, stream);
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407 else if (stream->type == PMT_CSO)
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409 cso_struct *cso = stream->param;
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412 case SEEK_CUR: cso->fpos_out += offset; break;
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413 case SEEK_SET: cso->fpos_out = offset; break;
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414 case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;
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416 return cso->fpos_out;
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422 int pm_close(pm_file *fp)
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426 if (fp == NULL) return EOF;
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428 if (fp->type == PMT_UNCOMPRESSED)
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432 else if (fp->type == PMT_ZIP)
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434 struct zip_file *z = fp->file;
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435 inflateEnd(&z->stream);
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438 else if (fp->type == PMT_CSO)
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450 // byteswap, data needs to be int aligned, src can match dst
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451 void Byteswap(void *dst, const void *src, int len)
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453 const unsigned int *ps = src;
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454 unsigned int *pd = dst;
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461 for (i = 0; i < len / 4; i++) {
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462 unsigned int t = ps[i];
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463 pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);
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467 // Interleve a 16k block and byteswap
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468 static int InterleveBlock(unsigned char *dest,unsigned char *src)
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471 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd
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472 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even
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476 // Decode a SMD file
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477 static int DecodeSmd(unsigned char *data,int len)
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479 unsigned char *temp=NULL;
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482 temp=(unsigned char *)malloc(0x4000);
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483 if (temp==NULL) return 1;
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484 memset(temp,0,0x4000);
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486 // Interleve each 16k block and shift down by 0x200:
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487 for (i=0; i+0x4200<=len; i+=0x4000)
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489 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer
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490 memcpy(data+i,temp,0x4000); // Copy back in
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497 static unsigned char *PicoCartAlloc(int filesize, int is_sms)
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499 unsigned char *rom;
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502 // make size power of 2 for easier banking handling
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503 int s = 0, tmp = filesize;
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504 while ((tmp >>= 1) != 0)
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506 if (filesize > (1 << s))
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508 rom_alloc_size = 1 << s;
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509 // be sure we can cover all address space
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510 if (rom_alloc_size < 0x10000)
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511 rom_alloc_size = 0x10000;
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514 // make alloc size at least sizeof(mcd_state),
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515 // in case we want to switch to CD mode
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516 if (filesize < sizeof(mcd_state))
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517 filesize = sizeof(mcd_state);
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519 // align to 512K for memhandlers
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520 rom_alloc_size = (filesize + 0x7ffff) & ~0x7ffff;
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523 if (rom_alloc_size - filesize < 4)
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524 rom_alloc_size += 4; // padding for out-of-bound exec protection
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526 // Allocate space for the rom plus padding
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527 // use special address for 32x dynarec
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528 rom = plat_mmap(0x02000000, rom_alloc_size, 0, 0);
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532 int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)
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534 unsigned char *rom;
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535 int size, bytes_read;
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541 if (size <= 0) return 1;
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542 size = (size+3)&~3; // Round up to a multiple of 4
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544 // Allocate space for the rom plus padding
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545 rom = PicoCartAlloc(size, is_sms);
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547 elprintf(EL_STATUS, "out of memory (wanted %i)", size);
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551 if (PicoCartLoadProgressCB != NULL)
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553 // read ROM in blocks, just for fun
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555 unsigned char *p = rom;
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559 int todo = size - bytes_read;
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560 if (todo > 256*1024) todo = 256*1024;
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561 ret = pm_read(p,todo,f);
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564 PicoCartLoadProgressCB(bytes_read * 100 / size);
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569 bytes_read = pm_read(rom,size,f); // Load up the rom
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570 if (bytes_read <= 0) {
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571 elprintf(EL_STATUS, "read failed");
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572 plat_munmap(rom, rom_alloc_size);
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578 // maybe we are loading MegaCD BIOS?
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579 if (!(PicoIn.AHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||
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580 !strncmp((char *)rom+0x128, "BOOT", 4))) {
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581 PicoIn.AHW |= PAHW_MCD;
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585 if (size >= 0x4200 && (size&0x3fff) == 0x200 &&
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586 ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {
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587 elprintf(EL_STATUS, "SMD format detected.");
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588 DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD
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590 else Byteswap(rom, rom, size); // Just byteswap
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594 if (size >= 0x4200 && (size&0x3fff) == 0x200) {
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595 elprintf(EL_STATUS, "SMD format detected.");
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596 // at least here it's not interleaved
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598 memmove(rom, rom + 0x200, size);
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602 if (prom) *prom = rom;
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603 if (psize) *psize = size;
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608 // Insert a cartridge:
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609 int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg)
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611 // notaz: add a 68k "jump one op back" opcode to the end of ROM.
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612 // This will hang the emu, but will prevent nasty crashes.
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613 // note: 4 bytes are padded to every ROM
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615 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped
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618 Pico.romsize=romsize;
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620 if (Pico.sv.data) {
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621 free(Pico.sv.data);
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622 Pico.sv.data = NULL;
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625 if (PicoCartUnloadHook != NULL) {
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626 PicoCartUnloadHook();
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627 PicoCartUnloadHook = NULL;
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631 PicoIn.AHW &= PAHW_MCD|PAHW_SMS;
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633 PicoCartMemSetup = NULL;
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634 PicoDmaHook = NULL;
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635 PicoResetHook = NULL;
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636 PicoLineHook = NULL;
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637 PicoLoadStateHook = NULL;
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638 carthw_chunks = NULL;
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640 if (!(PicoIn.AHW & (PAHW_MCD|PAHW_SMS)))
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641 PicoCartDetect(carthw_cfg);
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643 // setup correct memory map for loaded ROM
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644 switch (PicoIn.AHW) {
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646 elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoIn.AHW);
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648 case PAHW_SVP: PicoMemSetup(); break;
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649 case PAHW_MCD: PicoMemSetupCD(); break;
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650 case PAHW_PICO: PicoMemSetupPico(); break;
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651 case PAHW_SMS: PicoMemSetupMS(); break;
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654 if (PicoCartMemSetup != NULL)
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655 PicoCartMemSetup();
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657 if (PicoIn.AHW & PAHW_SMS)
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662 PicoGameLoaded = 1;
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666 int PicoCartResize(int newsize)
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668 void *tmp = plat_mremap(Pico.rom, rom_alloc_size, newsize);
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673 rom_alloc_size = newsize;
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677 void PicoCartUnload(void)
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679 if (PicoCartUnloadHook != NULL) {
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680 PicoCartUnloadHook();
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681 PicoCartUnloadHook = NULL;
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684 if (PicoIn.AHW & PAHW_32X)
\r
687 if (Pico.rom != NULL) {
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688 SekFinishIdleDet();
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689 plat_munmap(Pico.rom, rom_alloc_size);
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692 PicoGameLoaded = 0;
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695 static unsigned int rom_crc32(void)
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698 elprintf(EL_STATUS, "caclulating CRC32..");
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700 // have to unbyteswap for calculation..
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701 Byteswap(Pico.rom, Pico.rom, Pico.romsize);
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702 crc = crc32(0, Pico.rom, Pico.romsize);
\r
703 Byteswap(Pico.rom, Pico.rom, Pico.romsize);
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707 static int rom_strcmp(int rom_offset, const char *s1)
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709 int i, len = strlen(s1);
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710 const char *s_rom = (const char *)Pico.rom;
\r
711 if (rom_offset + len > Pico.romsize)
\r
713 for (i = 0; i < len; i++)
\r
714 if (s1[i] != s_rom[(i + rom_offset) ^ 1])
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719 static unsigned int rom_read32(int addr)
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721 unsigned short *m = (unsigned short *)(Pico.rom + addr);
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722 return (m[0] << 16) | m[1];
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725 static char *sskip(char *s)
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727 while (*s && isspace_(*s))
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732 static void rstrip(char *s)
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735 for (p = s + strlen(s) - 1; p >= s; p--)
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740 static int parse_3_vals(char *p, int *val0, int *val1, int *val2)
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743 *val0 = strtoul(p, &r, 0);
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749 *val1 = strtoul(p, &r, 0);
\r
755 *val2 = strtoul(p, &r, 0);
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764 static int is_expr(const char *expr, char **pr)
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766 int len = strlen(expr);
\r
769 if (strncmp(expr, p, len) != 0)
\r
771 p = sskip(p + len);
\r
773 return 0; // wrong or malformed
\r
775 *pr = sskip(p + 1);
\r
779 #include "carthw_cfg.c"
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781 static void parse_carthw(const char *carthw_cfg, int *fill_sram,
\r
784 int line = 0, any_checks_passed = 0, skip_sect = 0;
\r
785 const char *s, *builtin = builtin_carthw_cfg;
\r
786 int tmp, rom_crc = 0;
\r
787 char buff[256], *p, *r;
\r
790 f = fopen(carthw_cfg, "r");
\r
792 f = fopen("pico/carthw.cfg", "r");
\r
794 elprintf(EL_STATUS, "couldn't open carthw.cfg!");
\r
799 p = fgets(buff, sizeof(buff), f);
\r
806 for (s = builtin; *s != 0 && *s != '\n'; s++)
\r
811 if (tmp > sizeof(buff) - 1)
\r
812 tmp = sizeof(buff) - 1;
\r
813 memcpy(buff, builtin, tmp);
\r
821 if (*p == 0 || *p == '#')
\r
825 any_checks_passed = 0;
\r
833 /* look for checks */
\r
834 if (is_expr("check_str", &p))
\r
837 offs = strtoul(p, &r, 0);
\r
838 if (offs < 0 || offs > Pico.romsize) {
\r
839 elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);
\r
849 r = strchr(p, '"');
\r
854 if (rom_strcmp(offs, p) == 0)
\r
855 any_checks_passed = 1;
\r
860 else if (is_expr("check_size_gt", &p))
\r
863 size = strtoul(p, &r, 0);
\r
864 if (r == p || size < 0)
\r
867 if (Pico.romsize > size)
\r
868 any_checks_passed = 1;
\r
873 else if (is_expr("check_csum", &p))
\r
876 csum = strtoul(p, &r, 0);
\r
877 if (r == p || (csum & 0xffff0000))
\r
880 if (csum == (rom_read32(0x18c) & 0xffff))
\r
881 any_checks_passed = 1;
\r
886 else if (is_expr("check_crc32", &p))
\r
889 crc = strtoul(p, &r, 0);
\r
894 rom_crc = rom_crc32();
\r
895 if (crc == rom_crc)
\r
896 any_checks_passed = 1;
\r
902 /* now time for actions */
\r
903 if (is_expr("hw", &p)) {
\r
904 if (!any_checks_passed)
\r
909 if (strcmp(p, "svp") == 0)
\r
911 else if (strcmp(p, "pico") == 0)
\r
913 else if (strcmp(p, "prot") == 0)
\r
914 carthw_sprot_startup();
\r
915 else if (strcmp(p, "ssf2_mapper") == 0)
\r
916 carthw_ssf2_startup();
\r
917 else if (strcmp(p, "x_in_1_mapper") == 0)
\r
918 carthw_Xin1_startup();
\r
919 else if (strcmp(p, "realtec_mapper") == 0)
\r
920 carthw_realtec_startup();
\r
921 else if (strcmp(p, "radica_mapper") == 0)
\r
922 carthw_radica_startup();
\r
923 else if (strcmp(p, "piersolar_mapper") == 0)
\r
924 carthw_pier_startup();
\r
925 else if (strcmp(p, "prot_lk3") == 0)
\r
926 carthw_prot_lk3_startup();
\r
928 elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);
\r
934 if (is_expr("sram_range", &p)) {
\r
937 if (!any_checks_passed)
\r
941 start = strtoul(p, &r, 0);
\r
948 end = strtoul(p, &r, 0);
\r
951 if (((start | end) & 0xff000000) || start > end) {
\r
952 elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);
\r
955 Pico.sv.start = start;
\r
959 else if (is_expr("prop", &p)) {
\r
960 if (!any_checks_passed)
\r
964 if (strcmp(p, "no_sram") == 0)
\r
965 Pico.sv.flags &= ~SRF_ENABLED;
\r
966 else if (strcmp(p, "no_eeprom") == 0)
\r
967 Pico.sv.flags &= ~SRF_EEPROM;
\r
968 else if (strcmp(p, "filled_sram") == 0)
\r
970 else if (strcmp(p, "force_6btn") == 0)
\r
971 PicoIn.quirks |= PQUIRK_FORCE_6BTN;
\r
973 elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);
\r
976 elprintf(EL_STATUS, "game prop: %s", p);
\r
979 else if (is_expr("eeprom_type", &p)) {
\r
981 if (!any_checks_passed)
\r
985 type = strtoul(p, &r, 0);
\r
986 if (r == p || type < 0)
\r
988 Pico.sv.eeprom_type = type;
\r
989 Pico.sv.flags |= SRF_EEPROM;
\r
992 else if (is_expr("eeprom_lines", &p)) {
\r
993 int scl, sda_in, sda_out;
\r
994 if (!any_checks_passed)
\r
998 if (!parse_3_vals(p, &scl, &sda_in, &sda_out))
\r
1000 if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||
\r
1001 sda_out < 0 || sda_out > 15)
\r
1004 Pico.sv.eeprom_bit_cl = scl;
\r
1005 Pico.sv.eeprom_bit_in = sda_in;
\r
1006 Pico.sv.eeprom_bit_out= sda_out;
\r
1009 else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {
\r
1010 int addr, mask, val;
\r
1011 if (!any_checks_passed)
\r
1015 if (!parse_3_vals(p, &addr, &mask, &val))
\r
1018 carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);
\r
1024 elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);
\r
1030 elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);
\r
1040 * various cart-specific things, which can't be handled by generic code
\r
1042 static void PicoCartDetect(const char *carthw_cfg)
\r
1044 int carthw_detected = 0;
\r
1045 int fill_sram = 0;
\r
1047 memset(&Pico.sv, 0, sizeof(Pico.sv));
\r
1048 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')
\r
1050 Pico.sv.start = rom_read32(0x1B4) & ~0xff000001; // align
\r
1051 Pico.sv.end = (rom_read32(0x1B8) & ~0xff000000) | 1;
\r
1052 if (Pico.rom[0x1B2] & 0x40)
\r
1054 Pico.sv.flags |= SRF_EEPROM;
\r
1055 Pico.sv.flags |= SRF_ENABLED;
\r
1057 if (Pico.sv.end == 0 || Pico.sv.start > Pico.sv.end)
\r
1059 // some games may have bad headers, like S&K and Sonic3
\r
1060 // note: majority games use 0x200000 as starting address, but there are some which
\r
1061 // use something else (0x300000 by HardBall '95). Luckily they have good headers.
\r
1062 Pico.sv.start = 0x200000;
\r
1063 Pico.sv.end = 0x203FFF;
\r
1064 Pico.sv.flags |= SRF_ENABLED;
\r
1067 // set EEPROM defaults, in case it gets detected
\r
1068 Pico.sv.eeprom_type = 0; // 7bit (24C01)
\r
1069 Pico.sv.eeprom_bit_cl = 1;
\r
1070 Pico.sv.eeprom_bit_in = 0;
\r
1071 Pico.sv.eeprom_bit_out= 0;
\r
1073 if (carthw_cfg != NULL)
\r
1074 parse_carthw(carthw_cfg, &fill_sram, &carthw_detected);
\r
1076 // assume the standard mapper for large roms
\r
1077 if (!carthw_detected && Pico.romsize > 0x400000)
\r
1078 carthw_ssf2_startup();
\r
1080 if (Pico.sv.flags & SRF_ENABLED)
\r
1082 if (Pico.sv.flags & SRF_EEPROM)
\r
1083 Pico.sv.size = 0x2000;
\r
1085 Pico.sv.size = Pico.sv.end - Pico.sv.start + 1;
\r
1087 Pico.sv.data = calloc(Pico.sv.size, 1);
\r
1088 if (Pico.sv.data == NULL)
\r
1089 Pico.sv.flags &= ~SRF_ENABLED;
\r
1091 if (Pico.sv.eeprom_type == 1) // 1 == 0 in PD EEPROM code
\r
1092 Pico.sv.eeprom_type = 0;
\r
1095 if ((Pico.sv.flags & SRF_ENABLED) && fill_sram)
\r
1097 elprintf(EL_STATUS, "SRAM fill");
\r
1098 memset(Pico.sv.data, 0xff, Pico.sv.size);
\r
1101 // Unusual region 'code'
\r
1102 if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)
\r
1103 *(int *) (Pico.rom + 0x1f0) = 0x20204520;
\r
1106 // vim:shiftwidth=2:expandtab
\r