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(void);
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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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382 static void Byteswap(unsigned char *data,int len)
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386 if (len<2) return; // Too short
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390 unsigned short *pd=(unsigned short *)(data+i);
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391 int value=*pd; // Get 2 bytes
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393 value=(value<<8)|(value>>8); // Byteswap it
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394 *pd=(unsigned short)value; // Put 2b ytes
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400 // Interleve a 16k block and byteswap
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401 static int InterleveBlock(unsigned char *dest,unsigned char *src)
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404 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd
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405 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even
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409 // Decode a SMD file
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410 static int DecodeSmd(unsigned char *data,int len)
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412 unsigned char *temp=NULL;
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415 temp=(unsigned char *)malloc(0x4000);
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416 if (temp==NULL) return 1;
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417 memset(temp,0,0x4000);
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419 // Interleve each 16k block and shift down by 0x200:
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420 for (i=0; i+0x4200<=len; i+=0x4000)
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422 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer
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423 memcpy(data+i,temp,0x4000); // Copy back in
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430 static unsigned char *cd_realloc(void *old, int filesize)
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432 unsigned char *rom;
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433 rom=realloc(old, sizeof(mcd_state));
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434 if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);
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438 static unsigned char *PicoCartAlloc(int filesize, int is_sms)
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441 unsigned char *rom;
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443 if (PicoAHW & PAHW_MCD)
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444 return cd_realloc(NULL, filesize);
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447 // make size power of 2 for easier banking handling
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448 int s = 0, tmp = filesize;
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449 while ((tmp >>= 1) != 0)
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451 if (filesize > (1 << s))
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453 alloc_size = 1 << s;
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456 // align to 512K for memhandlers
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457 alloc_size = (filesize + 0x7ffff) & ~0x7ffff;
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460 if (alloc_size - filesize < 4)
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461 alloc_size += 4; // padding for out-of-bound exec protection
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463 // Allocate space for the rom plus padding
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464 rom = calloc(alloc_size, 1);
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468 int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)
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470 unsigned char *rom;
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471 int size, bytes_read;
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477 if (size <= 0) return 1;
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478 size = (size+3)&~3; // Round up to a multiple of 4
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480 // Allocate space for the rom plus padding
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481 rom = PicoCartAlloc(size, is_sms);
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483 elprintf(EL_STATUS, "out of memory (wanted %i)", size);
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487 if (PicoCartLoadProgressCB != NULL)
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489 // read ROM in blocks, just for fun
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491 unsigned char *p = rom;
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495 int todo = size - bytes_read;
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496 if (todo > 256*1024) todo = 256*1024;
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497 ret = pm_read(p,todo,f);
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500 PicoCartLoadProgressCB(bytes_read * 100 / size);
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505 bytes_read = pm_read(rom,size,f); // Load up the rom
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506 if (bytes_read <= 0) {
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507 elprintf(EL_STATUS, "read failed");
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514 // maybe we are loading MegaCD BIOS?
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515 if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||
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516 !strncmp((char *)rom+0x128, "BOOT", 4))) {
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517 PicoAHW |= PAHW_MCD;
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518 rom = cd_realloc(rom, size);
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522 if (size >= 0x4200 && (size&0x3fff) == 0x200 &&
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523 ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {
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524 elprintf(EL_STATUS, "SMD format detected.");
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525 DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD
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527 else Byteswap(rom,size); // Just byteswap
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531 if (size >= 0x4200 && (size&0x3fff) == 0x200) {
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532 elprintf(EL_STATUS, "SMD format detected.");
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533 // at least here it's not interleaved
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535 memmove(rom, rom + 0x200, size);
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539 if (prom) *prom = rom;
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540 if (psize) *psize = size;
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545 // Insert a cartridge:
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546 int PicoCartInsert(unsigned char *rom,unsigned int romsize)
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548 // notaz: add a 68k "jump one op back" opcode to the end of ROM.
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549 // This will hang the emu, but will prevent nasty crashes.
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550 // note: 4 bytes are padded to every ROM
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552 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped
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555 Pico.romsize=romsize;
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562 if (PicoCartUnloadHook != NULL) {
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563 PicoCartUnloadHook();
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564 PicoCartUnloadHook = NULL;
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567 PicoAHW &= PAHW_MCD|PAHW_SMS;
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569 PicoCartMemSetup = NULL;
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570 PicoDmaHook = NULL;
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571 PicoResetHook = NULL;
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572 PicoLineHook = NULL;
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573 PicoLoadStateHook = NULL;
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574 carthw_chunks = NULL;
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576 if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))
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579 // setup correct memory map for loaded ROM
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582 elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);
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584 case PAHW_SVP: PicoMemSetup(); break;
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585 case PAHW_MCD: PicoMemSetupCD(); break;
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586 case PAHW_PICO: PicoMemSetupPico(); break;
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587 case PAHW_SMS: PicoMemSetupMS(); break;
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590 if (PicoCartMemSetup != NULL)
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591 PicoCartMemSetup();
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593 if (PicoAHW & PAHW_SMS)
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601 void PicoCartUnload(void)
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603 if (PicoCartUnloadHook != NULL) {
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604 PicoCartUnloadHook();
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605 PicoCartUnloadHook = NULL;
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608 if (PicoAHW & PAHW_32X)
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611 if (Pico.rom != NULL) {
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612 SekFinishIdleDet();
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618 static unsigned int rom_crc32(void)
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621 elprintf(EL_STATUS, "caclulating CRC32..");
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623 // have to unbyteswap for calculation..
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624 Byteswap(Pico.rom, Pico.romsize);
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625 crc = crc32(0, Pico.rom, Pico.romsize);
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626 Byteswap(Pico.rom, Pico.romsize);
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630 static int rom_strcmp(int rom_offset, const char *s1)
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632 int i, len = strlen(s1);
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633 const char *s_rom = (const char *)Pico.rom;
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634 for (i = 0; i < len; i++)
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635 if (s1[i] != s_rom[(i + rom_offset) ^ 1])
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640 static unsigned int rom_read32(int addr)
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642 unsigned short *m = (unsigned short *)(Pico.rom + addr);
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643 return (m[0] << 16) | m[1];
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646 static char *sskip(char *s)
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648 while (*s && isspace_(*s))
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653 static void rstrip(char *s)
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656 for (p = s + strlen(s) - 1; p >= s; p--)
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661 static int parse_3_vals(char *p, int *val0, int *val1, int *val2)
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664 *val0 = strtoul(p, &r, 0);
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670 *val1 = strtoul(p, &r, 0);
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676 *val2 = strtoul(p, &r, 0);
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685 static int is_expr(const char *expr, char **pr)
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687 int len = strlen(expr);
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690 if (strncmp(expr, p, len) != 0)
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692 p = sskip(p + len);
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694 return 0; // wrong or malformed
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696 *pr = sskip(p + 1);
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700 static void parse_carthw(int *fill_sram)
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702 int line = 0, any_checks_passed = 0, skip_sect = 0;
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703 int tmp, rom_crc = 0;
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704 char buff[256], *p, *r;
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707 f = fopen("carthw.cfg", "r");
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709 elprintf(EL_STATUS, "couldn't open carthw.txt!");
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713 while ((p = fgets(buff, sizeof(buff), f)))
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717 if (*p == 0 || *p == '#')
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721 any_checks_passed = 0;
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729 /* look for checks */
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730 if (is_expr("check_str", &p))
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733 offs = strtoul(p, &r, 0);
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734 if (offs < 0 || offs > Pico.romsize) {
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735 elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);
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745 r = strchr(p, '"');
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750 if (rom_strcmp(offs, p) == 0)
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751 any_checks_passed = 1;
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756 else if (is_expr("check_size_gt", &p))
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759 size = strtoul(p, &r, 0);
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760 if (r == p || size < 0)
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763 if (Pico.romsize > size)
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764 any_checks_passed = 1;
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769 else if (is_expr("check_csum", &p))
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772 csum = strtoul(p, &r, 0);
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773 if (r == p || (csum & 0xffff0000))
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776 if (csum == (rom_read32(0x18c) & 0xffff))
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777 any_checks_passed = 1;
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782 else if (is_expr("check_crc32", &p))
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785 crc = strtoul(p, &r, 0);
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790 rom_crc = rom_crc32();
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791 if (crc == rom_crc)
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792 any_checks_passed = 1;
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798 /* now time for actions */
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799 if (is_expr("hw", &p)) {
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800 if (!any_checks_passed)
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804 if (strcmp(p, "svp") == 0)
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806 else if (strcmp(p, "pico") == 0)
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808 else if (strcmp(p, "prot") == 0)
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809 carthw_sprot_startup();
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810 else if (strcmp(p, "ssf2_mapper") == 0)
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811 carthw_ssf2_startup();
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812 else if (strcmp(p, "x_in_1_mapper") == 0)
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813 carthw_Xin1_startup();
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814 else if (strcmp(p, "realtec_mapper") == 0)
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815 carthw_realtec_startup();
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816 else if (strcmp(p, "radica_mapper") == 0)
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817 carthw_radica_startup();
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818 else if (strcmp(p, "prot_lk3") == 0)
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819 carthw_prot_lk3_startup();
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821 elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);
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826 if (is_expr("sram_range", &p)) {
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829 if (!any_checks_passed)
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833 start = strtoul(p, &r, 0);
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840 end = strtoul(p, &r, 0);
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843 if (((start | end) & 0xff000000) || start > end) {
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844 elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);
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847 SRam.start = start;
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851 else if (is_expr("prop", &p)) {
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852 if (!any_checks_passed)
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856 if (strcmp(p, "no_sram") == 0)
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857 SRam.flags &= ~SRF_ENABLED;
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858 else if (strcmp(p, "no_eeprom") == 0)
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859 SRam.flags &= ~SRF_EEPROM;
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860 else if (strcmp(p, "filled_sram") == 0)
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863 elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);
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868 else if (is_expr("eeprom_type", &p)) {
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870 if (!any_checks_passed)
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874 type = strtoul(p, &r, 0);
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875 if (r == p || type < 0)
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877 SRam.eeprom_type = type;
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878 SRam.flags |= SRF_EEPROM;
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881 else if (is_expr("eeprom_lines", &p)) {
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882 int scl, sda_in, sda_out;
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883 if (!any_checks_passed)
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887 if (!parse_3_vals(p, &scl, &sda_in, &sda_out))
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889 if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||
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890 sda_out < 0 || sda_out > 15)
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893 SRam.eeprom_bit_cl = scl;
\r
894 SRam.eeprom_bit_in = sda_in;
\r
895 SRam.eeprom_bit_out= sda_out;
\r
898 else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {
\r
899 int addr, mask, val;
\r
900 if (!any_checks_passed)
\r
904 if (!parse_3_vals(p, &addr, &mask, &val))
\r
907 carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);
\r
913 elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);
\r
919 elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);
\r
927 * various cart-specific things, which can't be handled by generic code
\r
929 static void PicoCartDetect(void)
\r
933 memset(&SRam, 0, sizeof(SRam));
\r
934 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')
\r
936 SRam.start = rom_read32(0x1B4) & ~0xff000001; // align
\r
937 SRam.end = (rom_read32(0x1B8) & ~0xff000000) | 1;
\r
938 if (Pico.rom[0x1B2] & 0x40)
\r
940 SRam.flags |= SRF_EEPROM;
\r
941 SRam.flags |= SRF_ENABLED;
\r
943 if (SRam.end == 0 || SRam.start > SRam.end)
\r
945 // some games may have bad headers, like S&K and Sonic3
\r
946 // note: majority games use 0x200000 as starting address, but there are some which
\r
947 // use something else (0x300000 by HardBall '95). Luckily they have good headers.
\r
948 SRam.start = 0x200000;
\r
949 SRam.end = 0x203FFF;
\r
950 SRam.flags |= SRF_ENABLED;
\r
953 // set EEPROM defaults, in case it gets detected
\r
954 SRam.eeprom_type = 0; // 7bit (24C01)
\r
955 SRam.eeprom_bit_cl = 1;
\r
956 SRam.eeprom_bit_in = 0;
\r
957 SRam.eeprom_bit_out= 0;
\r
959 parse_carthw(&fill_sram);
\r
961 if (SRam.flags & SRF_ENABLED)
\r
963 if (SRam.flags & SRF_EEPROM)
\r
964 SRam.size = 0x2000;
\r
966 SRam.size = SRam.end - SRam.start + 1;
\r
968 SRam.data = calloc(SRam.size, 1);
\r
969 if (SRam.data == NULL)
\r
970 SRam.flags &= ~SRF_ENABLED;
\r
972 if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code
\r
973 SRam.eeprom_type = 0;
\r
976 if ((SRam.flags & SRF_ENABLED) && fill_sram)
\r
978 elprintf(EL_STATUS, "SRAM fill");
\r
979 memset(SRam.data, 0xff, SRam.size);
\r
982 // Unusual region 'code'
\r
983 if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)
\r
984 *(int *) (Pico.rom + 0x1f0) = 0x20204520;
\r