1 // This is part of Pico Library
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3 // (c) Copyright 2004 Dave, All rights reserved.
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4 // (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas
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5 // Free for non-commercial use.
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7 // For commercial use, separate licencing terms must be obtained.
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10 #include "pico_int.h"
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11 #include "../zlib/zlib.h"
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12 #include "../unzip/unzip.h"
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13 #include "../unzip/unzip_stream.h"
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16 static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };
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18 void (*PicoCartUnloadHook)(void);
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19 void (*PicoCartMemSetup)(void);
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21 void (*PicoCartLoadProgressCB)(int percent) = NULL;
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22 void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c
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24 static void PicoCartDetect(const char *carthw_cfg);
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27 typedef struct _cso_struct
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29 unsigned char in_buff[2*2048];
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30 unsigned char out_buff[2048];
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33 unsigned int unused;
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34 unsigned int total_bytes;
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35 unsigned int total_bytes_high; // ignored here
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36 unsigned int block_size; // 10h
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38 unsigned char align;
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39 unsigned char reserved[2];
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41 unsigned int fpos_in; // input file read pointer
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42 unsigned int fpos_out; // pos in virtual decompressed file
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43 int block_in_buff; // block which we have read in in_buff
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49 static int uncompress2(void *dest, int destLen, void *source, int sourceLen)
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54 stream.next_in = (Bytef*)source;
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55 stream.avail_in = (uInt)sourceLen;
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56 stream.next_out = dest;
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57 stream.avail_out = (uInt)destLen;
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59 stream.zalloc = NULL;
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60 stream.zfree = NULL;
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62 err = inflateInit2(&stream, -15);
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63 if (err != Z_OK) return err;
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65 err = inflate(&stream, Z_FINISH);
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66 if (err != Z_STREAM_END) {
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67 inflateEnd(&stream);
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70 //*destLen = stream.total_out;
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72 return inflateEnd(&stream);
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75 static const char *get_ext(const char *path)
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78 if (strlen(path) < 4)
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79 return ""; // no ext
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81 // allow 2 or 3 char extensions for now
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82 ext = path + strlen(path) - 2;
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83 if (ext[-1] != '.') ext--;
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89 pm_file *pm_open(const char *path)
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91 pm_file *file = NULL;
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98 ext = get_ext(path);
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99 if (strcasecmp(ext, "zip") == 0)
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101 struct zipent *zipentry;
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106 zipfile = openzip(path);
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107 if (zipfile != NULL)
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109 /* search for suitable file (right extension or large enough file) */
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110 while ((zipentry = readzip(zipfile)) != NULL)
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112 ext = get_ext(zipentry->name);
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114 if (zipentry->uncompressed_size >= 32*1024)
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115 goto found_rom_zip;
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117 for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)
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118 if (strcasecmp(ext, rom_exts[i]) == 0)
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119 goto found_rom_zip;
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122 /* zipfile given, but nothing found suitable for us inside */
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126 /* try to convert to gzip stream, so we could use standard gzio functions from zlib */
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127 gzf = zip2gz(zipfile, zipentry);
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128 if (gzf == NULL) goto zip_failed;
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130 file = calloc(1, sizeof(*file));
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131 if (file == NULL) goto zip_failed;
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132 file->file = zipfile;
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134 file->size = zipentry->uncompressed_size;
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135 file->type = PMT_ZIP;
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136 strncpy(file->ext, ext, sizeof(file->ext) - 1);
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142 zipfile->fp = NULL; // gzclose() closed it
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148 else if (strcasecmp(ext, "cso") == 0)
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150 cso_struct *cso = NULL, *tmp = NULL;
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152 f = fopen(path, "rb");
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157 /* we use our own buffering */
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158 setvbuf(f, NULL, _IONBF, 0);
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161 cso = malloc(sizeof(*cso));
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165 if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))
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168 if (strncmp(cso->header.magic, "CISO", 4) != 0) {
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169 elprintf(EL_STATUS, "cso: bad header");
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173 if (cso->header.block_size != 2048) {
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174 elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);
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178 size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);
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179 tmp = realloc(cso, size);
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183 elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);
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185 size -= sizeof(*cso); // index size
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186 if (fread(cso->index, 1, size, f) != size) {
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187 elprintf(EL_STATUS, "cso: premature EOF");
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192 cso->fpos_in = ftell(f);
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194 cso->block_in_buff = -1;
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195 file = calloc(1, sizeof(*file));
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196 if (file == NULL) goto cso_failed;
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199 file->size = cso->header.total_bytes;
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200 file->type = PMT_CSO;
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204 if (cso != NULL) free(cso);
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205 if (f != NULL) fclose(f);
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209 /* not a zip, treat as uncompressed file */
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210 f = fopen(path, "rb");
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211 if (f == NULL) return NULL;
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213 file = calloc(1, sizeof(*file));
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214 if (file == NULL) {
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218 fseek(f, 0, SEEK_END);
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220 file->param = NULL;
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221 file->size = ftell(f);
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222 file->type = PMT_UNCOMPRESSED;
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223 strncpy(file->ext, ext, sizeof(file->ext) - 1);
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224 fseek(f, 0, SEEK_SET);
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226 #ifndef __EPOC32__ // makes things worse on Symbian
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227 if (file->size > 0x400000)
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228 /* we use our own buffering */
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229 setvbuf(f, NULL, _IONBF, 0);
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235 size_t pm_read(void *ptr, size_t bytes, pm_file *stream)
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239 if (stream->type == PMT_UNCOMPRESSED)
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241 ret = fread(ptr, 1, bytes, stream->file);
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243 else if (stream->type == PMT_ZIP)
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245 gzFile gf = stream->param;
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247 ret = gzread(gf, ptr, bytes);
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248 err = gzerror2(gf);
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249 if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))
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250 /* we must reset stream pointer or else next seek/read fails */
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253 else if (stream->type == PMT_CSO)
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255 cso_struct *cso = stream->param;
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256 int read_pos, read_len, out_offs, rret;
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257 int block = cso->fpos_out >> 11;
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258 int index = cso->index[block];
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259 int index_end = cso->index[block+1];
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260 unsigned char *out = ptr, *tmp_dst;
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265 out_offs = cso->fpos_out&0x7ff;
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266 if (out_offs == 0 && bytes >= 2048)
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268 else tmp_dst = cso->out_buff;
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270 read_pos = (index&0x7fffffff) << cso->header.align;
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273 if (read_pos != cso->fpos_in)
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274 fseek(stream->file, read_pos, SEEK_SET);
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275 rret = fread(tmp_dst, 1, 2048, stream->file);
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276 cso->fpos_in = read_pos + rret;
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277 if (rret != 2048) break;
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279 read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;
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280 if (block != cso->block_in_buff)
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282 if (read_pos != cso->fpos_in)
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283 fseek(stream->file, read_pos, SEEK_SET);
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284 rret = fread(cso->in_buff, 1, read_len, stream->file);
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285 cso->fpos_in = read_pos + rret;
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286 if (rret != read_len) {
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287 elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);
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290 cso->block_in_buff = block;
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292 rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);
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294 elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);
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300 if (out_offs != 0 || bytes < 2048) {
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301 //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);
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302 if (bytes < rret) rret = bytes;
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303 if (2048 - out_offs < rret) rret = 2048 - out_offs;
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304 memcpy(out, tmp_dst + out_offs, rret);
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308 cso->fpos_out += rret;
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312 index_end = cso->index[block+1];
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321 int pm_seek(pm_file *stream, long offset, int whence)
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323 if (stream->type == PMT_UNCOMPRESSED)
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325 fseek(stream->file, offset, whence);
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326 return ftell(stream->file);
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328 else if (stream->type == PMT_ZIP)
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330 if (PicoMessage != NULL && offset > 6*1024*1024) {
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331 long pos = gztell((gzFile) stream->param);
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332 if (offset < pos || offset - pos > 6*1024*1024)
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333 PicoMessage("Decompressing data...");
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335 return gzseek((gzFile) stream->param, offset, whence);
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337 else if (stream->type == PMT_CSO)
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339 cso_struct *cso = stream->param;
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342 case SEEK_CUR: cso->fpos_out += offset; break;
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343 case SEEK_SET: cso->fpos_out = offset; break;
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344 case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;
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346 return cso->fpos_out;
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352 int pm_close(pm_file *fp)
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356 if (fp == NULL) return EOF;
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358 if (fp->type == PMT_UNCOMPRESSED)
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362 else if (fp->type == PMT_ZIP)
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364 ZIP *zipfile = fp->file;
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365 gzclose((gzFile) fp->param);
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366 zipfile->fp = NULL; // gzclose() closed it
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369 else if (fp->type == PMT_CSO)
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381 // byteswap, data needs to be int aligned, src can match dst
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382 void Byteswap(void *dst, const void *src, int len)
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384 const unsigned int *ps = src;
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385 unsigned int *pd = dst;
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392 for (i = 0; i < len / 4; i++) {
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393 unsigned int t = ps[i];
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394 pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);
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398 // Interleve a 16k block and byteswap
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399 static int InterleveBlock(unsigned char *dest,unsigned char *src)
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402 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd
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403 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even
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407 // Decode a SMD file
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408 static int DecodeSmd(unsigned char *data,int len)
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410 unsigned char *temp=NULL;
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413 temp=(unsigned char *)malloc(0x4000);
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414 if (temp==NULL) return 1;
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415 memset(temp,0,0x4000);
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417 // Interleve each 16k block and shift down by 0x200:
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418 for (i=0; i+0x4200<=len; i+=0x4000)
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420 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer
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421 memcpy(data+i,temp,0x4000); // Copy back in
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428 static unsigned char *cd_realloc(void *old, int filesize)
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430 unsigned char *rom;
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431 rom=realloc(old, sizeof(mcd_state));
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432 if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);
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436 static unsigned char *PicoCartAlloc(int filesize, int is_sms)
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439 unsigned char *rom;
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441 if (PicoAHW & PAHW_MCD)
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442 return cd_realloc(NULL, filesize);
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445 // make size power of 2 for easier banking handling
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446 int s = 0, tmp = filesize;
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447 while ((tmp >>= 1) != 0)
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449 if (filesize > (1 << s))
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451 alloc_size = 1 << s;
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454 // align to 512K for memhandlers
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455 alloc_size = (filesize + 0x7ffff) & ~0x7ffff;
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458 if (alloc_size - filesize < 4)
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459 alloc_size += 4; // padding for out-of-bound exec protection
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461 // Allocate space for the rom plus padding
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462 rom = calloc(alloc_size, 1);
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466 int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)
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468 unsigned char *rom;
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469 int size, bytes_read;
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475 if (size <= 0) return 1;
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476 size = (size+3)&~3; // Round up to a multiple of 4
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478 // Allocate space for the rom plus padding
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479 rom = PicoCartAlloc(size, is_sms);
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481 elprintf(EL_STATUS, "out of memory (wanted %i)", size);
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485 if (PicoCartLoadProgressCB != NULL)
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487 // read ROM in blocks, just for fun
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489 unsigned char *p = rom;
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493 int todo = size - bytes_read;
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494 if (todo > 256*1024) todo = 256*1024;
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495 ret = pm_read(p,todo,f);
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498 PicoCartLoadProgressCB(bytes_read * 100 / size);
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503 bytes_read = pm_read(rom,size,f); // Load up the rom
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504 if (bytes_read <= 0) {
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505 elprintf(EL_STATUS, "read failed");
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512 // maybe we are loading MegaCD BIOS?
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513 if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||
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514 !strncmp((char *)rom+0x128, "BOOT", 4))) {
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515 PicoAHW |= PAHW_MCD;
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516 rom = cd_realloc(rom, size);
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520 if (size >= 0x4200 && (size&0x3fff) == 0x200 &&
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521 ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {
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522 elprintf(EL_STATUS, "SMD format detected.");
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523 DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD
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525 else Byteswap(rom, rom, size); // Just byteswap
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529 if (size >= 0x4200 && (size&0x3fff) == 0x200) {
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530 elprintf(EL_STATUS, "SMD format detected.");
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531 // at least here it's not interleaved
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533 memmove(rom, rom + 0x200, size);
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537 if (prom) *prom = rom;
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538 if (psize) *psize = size;
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543 // Insert a cartridge:
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544 int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg)
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546 // notaz: add a 68k "jump one op back" opcode to the end of ROM.
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547 // This will hang the emu, but will prevent nasty crashes.
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548 // note: 4 bytes are padded to every ROM
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550 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped
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553 Pico.romsize=romsize;
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560 if (PicoCartUnloadHook != NULL) {
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561 PicoCartUnloadHook();
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562 PicoCartUnloadHook = NULL;
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565 PicoAHW &= PAHW_MCD|PAHW_SMS;
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567 PicoCartMemSetup = NULL;
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568 PicoDmaHook = NULL;
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569 PicoResetHook = NULL;
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570 PicoLineHook = NULL;
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571 PicoLoadStateHook = NULL;
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572 carthw_chunks = NULL;
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574 if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))
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575 PicoCartDetect(carthw_cfg);
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577 // setup correct memory map for loaded ROM
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580 elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);
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582 case PAHW_SVP: PicoMemSetup(); break;
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583 case PAHW_MCD: PicoMemSetupCD(); break;
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584 case PAHW_PICO: PicoMemSetupPico(); break;
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585 case PAHW_SMS: PicoMemSetupMS(); break;
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588 if (PicoCartMemSetup != NULL)
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589 PicoCartMemSetup();
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591 if (PicoAHW & PAHW_SMS)
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599 void PicoCartUnload(void)
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601 if (PicoCartUnloadHook != NULL) {
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602 PicoCartUnloadHook();
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603 PicoCartUnloadHook = NULL;
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606 if (PicoAHW & PAHW_32X)
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609 if (Pico.rom != NULL) {
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610 SekFinishIdleDet();
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616 static unsigned int rom_crc32(void)
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619 elprintf(EL_STATUS, "caclulating CRC32..");
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621 // have to unbyteswap for calculation..
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622 Byteswap(Pico.rom, Pico.rom, Pico.romsize);
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623 crc = crc32(0, Pico.rom, Pico.romsize);
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624 Byteswap(Pico.rom, Pico.rom, Pico.romsize);
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628 static int rom_strcmp(int rom_offset, const char *s1)
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630 int i, len = strlen(s1);
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631 const char *s_rom = (const char *)Pico.rom;
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632 for (i = 0; i < len; i++)
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633 if (s1[i] != s_rom[(i + rom_offset) ^ 1])
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638 static unsigned int rom_read32(int addr)
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640 unsigned short *m = (unsigned short *)(Pico.rom + addr);
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641 return (m[0] << 16) | m[1];
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644 static char *sskip(char *s)
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646 while (*s && isspace_(*s))
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651 static void rstrip(char *s)
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654 for (p = s + strlen(s) - 1; p >= s; p--)
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659 static int parse_3_vals(char *p, int *val0, int *val1, int *val2)
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662 *val0 = strtoul(p, &r, 0);
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668 *val1 = strtoul(p, &r, 0);
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674 *val2 = strtoul(p, &r, 0);
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683 static int is_expr(const char *expr, char **pr)
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685 int len = strlen(expr);
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688 if (strncmp(expr, p, len) != 0)
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690 p = sskip(p + len);
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692 return 0; // wrong or malformed
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694 *pr = sskip(p + 1);
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698 static void parse_carthw(const char *carthw_cfg, int *fill_sram)
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700 int line = 0, any_checks_passed = 0, skip_sect = 0;
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701 int tmp, rom_crc = 0;
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702 char buff[256], *p, *r;
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705 f = fopen(carthw_cfg, "r");
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707 elprintf(EL_STATUS, "couldn't open carthw.cfg!");
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711 while ((p = fgets(buff, sizeof(buff), f)))
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715 if (*p == 0 || *p == '#')
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719 any_checks_passed = 0;
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727 /* look for checks */
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728 if (is_expr("check_str", &p))
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731 offs = strtoul(p, &r, 0);
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732 if (offs < 0 || offs > Pico.romsize) {
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733 elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);
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743 r = strchr(p, '"');
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748 if (rom_strcmp(offs, p) == 0)
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749 any_checks_passed = 1;
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754 else if (is_expr("check_size_gt", &p))
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757 size = strtoul(p, &r, 0);
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758 if (r == p || size < 0)
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761 if (Pico.romsize > size)
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762 any_checks_passed = 1;
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767 else if (is_expr("check_csum", &p))
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770 csum = strtoul(p, &r, 0);
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771 if (r == p || (csum & 0xffff0000))
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774 if (csum == (rom_read32(0x18c) & 0xffff))
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775 any_checks_passed = 1;
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780 else if (is_expr("check_crc32", &p))
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783 crc = strtoul(p, &r, 0);
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788 rom_crc = rom_crc32();
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789 if (crc == rom_crc)
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790 any_checks_passed = 1;
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796 /* now time for actions */
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797 if (is_expr("hw", &p)) {
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798 if (!any_checks_passed)
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802 if (strcmp(p, "svp") == 0)
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804 else if (strcmp(p, "pico") == 0)
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806 else if (strcmp(p, "prot") == 0)
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807 carthw_sprot_startup();
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808 else if (strcmp(p, "ssf2_mapper") == 0)
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809 carthw_ssf2_startup();
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810 else if (strcmp(p, "x_in_1_mapper") == 0)
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811 carthw_Xin1_startup();
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812 else if (strcmp(p, "realtec_mapper") == 0)
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813 carthw_realtec_startup();
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814 else if (strcmp(p, "radica_mapper") == 0)
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815 carthw_radica_startup();
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816 else if (strcmp(p, "prot_lk3") == 0)
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817 carthw_prot_lk3_startup();
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819 elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);
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824 if (is_expr("sram_range", &p)) {
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827 if (!any_checks_passed)
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831 start = strtoul(p, &r, 0);
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838 end = strtoul(p, &r, 0);
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841 if (((start | end) & 0xff000000) || start > end) {
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842 elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);
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845 SRam.start = start;
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849 else if (is_expr("prop", &p)) {
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850 if (!any_checks_passed)
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854 if (strcmp(p, "no_sram") == 0)
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855 SRam.flags &= ~SRF_ENABLED;
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856 else if (strcmp(p, "no_eeprom") == 0)
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857 SRam.flags &= ~SRF_EEPROM;
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858 else if (strcmp(p, "filled_sram") == 0)
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861 elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);
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866 else if (is_expr("eeprom_type", &p)) {
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868 if (!any_checks_passed)
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872 type = strtoul(p, &r, 0);
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873 if (r == p || type < 0)
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875 SRam.eeprom_type = type;
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876 SRam.flags |= SRF_EEPROM;
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879 else if (is_expr("eeprom_lines", &p)) {
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880 int scl, sda_in, sda_out;
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881 if (!any_checks_passed)
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885 if (!parse_3_vals(p, &scl, &sda_in, &sda_out))
\r
887 if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||
\r
888 sda_out < 0 || sda_out > 15)
\r
891 SRam.eeprom_bit_cl = scl;
\r
892 SRam.eeprom_bit_in = sda_in;
\r
893 SRam.eeprom_bit_out= sda_out;
\r
896 else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {
\r
897 int addr, mask, val;
\r
898 if (!any_checks_passed)
\r
902 if (!parse_3_vals(p, &addr, &mask, &val))
\r
905 carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);
\r
911 elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);
\r
917 elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);
\r
925 * various cart-specific things, which can't be handled by generic code
\r
927 static void PicoCartDetect(const char *carthw_cfg)
\r
931 memset(&SRam, 0, sizeof(SRam));
\r
932 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')
\r
934 SRam.start = rom_read32(0x1B4) & ~0xff000001; // align
\r
935 SRam.end = (rom_read32(0x1B8) & ~0xff000000) | 1;
\r
936 if (Pico.rom[0x1B2] & 0x40)
\r
938 SRam.flags |= SRF_EEPROM;
\r
939 SRam.flags |= SRF_ENABLED;
\r
941 if (SRam.end == 0 || SRam.start > SRam.end)
\r
943 // some games may have bad headers, like S&K and Sonic3
\r
944 // note: majority games use 0x200000 as starting address, but there are some which
\r
945 // use something else (0x300000 by HardBall '95). Luckily they have good headers.
\r
946 SRam.start = 0x200000;
\r
947 SRam.end = 0x203FFF;
\r
948 SRam.flags |= SRF_ENABLED;
\r
951 // set EEPROM defaults, in case it gets detected
\r
952 SRam.eeprom_type = 0; // 7bit (24C01)
\r
953 SRam.eeprom_bit_cl = 1;
\r
954 SRam.eeprom_bit_in = 0;
\r
955 SRam.eeprom_bit_out= 0;
\r
957 if (carthw_cfg != NULL)
\r
958 parse_carthw(carthw_cfg, &fill_sram);
\r
960 if (SRam.flags & SRF_ENABLED)
\r
962 if (SRam.flags & SRF_EEPROM)
\r
963 SRam.size = 0x2000;
\r
965 SRam.size = SRam.end - SRam.start + 1;
\r
967 SRam.data = calloc(SRam.size, 1);
\r
968 if (SRam.data == NULL)
\r
969 SRam.flags &= ~SRF_ENABLED;
\r
971 if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code
\r
972 SRam.eeprom_type = 0;
\r
975 if ((SRam.flags & SRF_ENABLED) && fill_sram)
\r
977 elprintf(EL_STATUS, "SRAM fill");
\r
978 memset(SRam.data, 0xff, SRam.size);
\r
981 // Unusual region 'code'
\r
982 if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)
\r
983 *(int *) (Pico.rom + 0x1f0) = 0x20204520;
\r