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 "PicoInt.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 char *rom_exts[] = { "bin", "gen", "smd", "iso" };
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18 void (*PicoCartLoadProgressCB)(int percent) = NULL;
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19 void (*PicoCDLoadProgressCB)(int percent) = NULL; // handled in Pico/cd/cd_file.c
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22 typedef struct _cso_struct
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24 unsigned char in_buff[2*2048];
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25 unsigned char out_buff[2048];
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28 unsigned int unused;
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29 unsigned int total_bytes;
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30 unsigned int total_bytes_high; // ignored here
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31 unsigned int block_size; // 10h
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33 unsigned char align;
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34 unsigned char reserved[2];
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36 unsigned int fpos_in; // input file read pointer
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37 unsigned int fpos_out; // pos in virtual decompressed file
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38 int block_in_buff; // block which we have read in in_buff
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44 static int uncompress2(void *dest, int destLen, void *source, int sourceLen)
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49 stream.next_in = (Bytef*)source;
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50 stream.avail_in = (uInt)sourceLen;
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51 stream.next_out = dest;
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52 stream.avail_out = (uInt)destLen;
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54 stream.zalloc = NULL;
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55 stream.zfree = NULL;
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57 err = inflateInit2(&stream, -15);
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58 if (err != Z_OK) return err;
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60 err = inflate(&stream, Z_FINISH);
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61 if (err != Z_STREAM_END) {
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62 inflateEnd(&stream);
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65 //*destLen = stream.total_out;
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67 return inflateEnd(&stream);
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70 pm_file *pm_open(const char *path)
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72 pm_file *file = NULL;
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76 if (path == NULL) return NULL;
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78 if (strlen(path) < 5) ext = NULL; // no ext
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79 else ext = path + strlen(path) - 3;
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81 if (ext && strcasecmp(ext, "zip") == 0)
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83 struct zipent *zipentry;
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88 zipfile = openzip(path);
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90 if (zipfile != NULL)
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92 /* search for suitable file (right extension or large enough file) */
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93 while ((zipentry = readzip(zipfile)) != NULL)
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95 if (zipentry->uncompressed_size >= 128*1024) goto found_rom_zip;
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96 if (strlen(zipentry->name) < 5) continue;
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98 ext = zipentry->name+strlen(zipentry->name)-3;
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99 for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)
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100 if (strcasecmp(ext, rom_exts[i]) == 0) goto found_rom_zip;
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103 /* zipfile given, but nothing found suitable for us inside */
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107 /* try to convert to gzip stream, so we could use standard gzio functions from zlib */
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108 gzf = zip2gz(zipfile, zipentry);
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109 if (gzf == NULL) goto zip_failed;
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111 file = malloc(sizeof(*file));
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112 if (file == NULL) goto zip_failed;
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113 file->file = zipfile;
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115 file->size = zipentry->uncompressed_size;
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116 file->type = PMT_ZIP;
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122 zipfile->fp = NULL; // gzclose() closed it
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128 else if (ext && strcasecmp(ext, "cso") == 0)
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130 cso_struct *cso = NULL, *tmp = NULL;
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132 f = fopen(path, "rb");
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136 cso = malloc(sizeof(*cso));
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140 if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))
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143 if (strncmp(cso->header.magic, "CISO", 4) != 0) {
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144 elprintf(EL_STATUS, "cso: bad header");
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148 if (cso->header.block_size != 2048) {
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149 elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);
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153 size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);
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154 tmp = realloc(cso, size);
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158 elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);
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160 size -= sizeof(*cso); // index size
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161 if (fread(cso->index, 1, size, f) != size) {
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162 elprintf(EL_STATUS, "cso: premature EOF");
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167 cso->fpos_in = ftell(f);
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169 cso->block_in_buff = -1;
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170 file = malloc(sizeof(*file));
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171 if (file == NULL) goto cso_failed;
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174 file->size = cso->header.total_bytes;
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175 file->type = PMT_CSO;
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179 if (cso != NULL) free(cso);
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180 if (f != NULL) fclose(f);
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184 /* not a zip, treat as uncompressed file */
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185 f = fopen(path, "rb");
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186 if (f == NULL) return NULL;
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188 /* we use our own buffering */
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189 setvbuf(f, NULL, _IONBF, 0);
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191 file = malloc(sizeof(*file));
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192 if (file == NULL) {
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196 fseek(f, 0, SEEK_END);
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198 file->param = NULL;
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199 file->size = ftell(f);
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200 file->type = PMT_UNCOMPRESSED;
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201 fseek(f, 0, SEEK_SET);
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205 size_t pm_read(void *ptr, size_t bytes, pm_file *stream)
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209 if (stream->type == PMT_UNCOMPRESSED)
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211 ret = fread(ptr, 1, bytes, stream->file);
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213 else if (stream->type == PMT_ZIP)
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215 gzFile gf = stream->param;
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217 ret = gzread(gf, ptr, bytes);
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218 err = gzerror2(gf);
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219 if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))
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220 /* we must reset stream pointer or else next seek/read fails */
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223 else if (stream->type == PMT_CSO)
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225 cso_struct *cso = stream->param;
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226 int read_pos, read_len, out_offs, rret;
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227 int block = cso->fpos_out >> 11;
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228 int index = cso->index[block];
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229 int index_end = cso->index[block+1];
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230 unsigned char *out = ptr, *tmp_dst;
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235 out_offs = cso->fpos_out&0x7ff;
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236 if (out_offs == 0 && bytes >= 2048)
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238 else tmp_dst = cso->out_buff;
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240 read_pos = (index&0x7fffffff) << cso->header.align;
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243 if (read_pos != cso->fpos_in)
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244 fseek(stream->file, read_pos, SEEK_SET);
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245 rret = fread(tmp_dst, 1, 2048, stream->file);
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246 cso->fpos_in = read_pos + rret;
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247 if (rret != 2048) break;
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249 read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;
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250 if (block != cso->block_in_buff)
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252 if (read_pos != cso->fpos_in)
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253 fseek(stream->file, read_pos, SEEK_SET);
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254 rret = fread(cso->in_buff, 1, read_len, stream->file);
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255 cso->fpos_in = read_pos + rret;
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256 if (rret != read_len) {
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257 elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);
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260 cso->block_in_buff = block;
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262 rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);
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264 elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);
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270 if (out_offs != 0 || bytes < 2048) {
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271 //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);
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272 if (bytes < rret) rret = bytes;
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273 if (2048 - out_offs < rret) rret = 2048 - out_offs;
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274 memcpy(out, tmp_dst + out_offs, rret);
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278 cso->fpos_out += rret;
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282 index_end = cso->index[block+1];
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291 int pm_seek(pm_file *stream, long offset, int whence)
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293 if (stream->type == PMT_UNCOMPRESSED)
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295 fseek(stream->file, offset, whence);
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296 return ftell(stream->file);
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298 else if (stream->type == PMT_ZIP)
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300 if (PicoMessage != NULL && offset > 6*1024*1024) {
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301 long pos = gztell((gzFile) stream->param);
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302 if (offset < pos || offset - pos > 6*1024*1024)
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303 PicoMessage("Decompressing data...");
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305 return gzseek((gzFile) stream->param, offset, whence);
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307 else if (stream->type == PMT_CSO)
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309 cso_struct *cso = stream->param;
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312 case SEEK_CUR: cso->fpos_out += offset; break;
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313 case SEEK_SET: cso->fpos_out = offset; break;
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314 case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;
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316 return cso->fpos_out;
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322 int pm_close(pm_file *fp)
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326 if (fp == NULL) return EOF;
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328 if (fp->type == PMT_UNCOMPRESSED)
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332 else if (fp->type == PMT_ZIP)
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334 ZIP *zipfile = fp->file;
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335 gzclose((gzFile) fp->param);
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336 zipfile->fp = NULL; // gzclose() closed it
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339 else if (fp->type == PMT_CSO)
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352 void Byteswap(unsigned char *data,int len)
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356 if (len<2) return; // Too short
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360 unsigned short *pd=(unsigned short *)(data+i);
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361 int value=*pd; // Get 2 bytes
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363 value=(value<<8)|(value>>8); // Byteswap it
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364 *pd=(unsigned short)value; // Put 2b ytes
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370 // Interleve a 16k block and byteswap
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371 static int InterleveBlock(unsigned char *dest,unsigned char *src)
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374 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd
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375 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even
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379 // Decode a SMD file
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380 static int DecodeSmd(unsigned char *data,int len)
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382 unsigned char *temp=NULL;
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385 temp=(unsigned char *)malloc(0x4000);
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386 if (temp==NULL) return 1;
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387 memset(temp,0,0x4000);
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389 // Interleve each 16k block and shift down by 0x200:
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390 for (i=0; i+0x4200<=len; i+=0x4000)
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392 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer
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393 memcpy(data+i,temp,0x4000); // Copy back in
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400 static unsigned char *cd_realloc(void *old, int filesize)
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402 unsigned char *rom;
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403 rom=realloc(old, sizeof(mcd_state));
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404 if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);
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408 static unsigned char *PicoCartAlloc(int filesize)
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411 unsigned char *rom;
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413 if (PicoMCD & 1) return cd_realloc(NULL, filesize);
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415 alloc_size=filesize+0x7ffff;
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416 if((filesize&0x3fff)==0x200) alloc_size-=0x200;
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417 alloc_size&=~0x7ffff; // use alloc size of multiples of 512K, so that memhandlers could be set up more efficiently
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418 if((filesize&0x3fff)==0x200) alloc_size+=0x200;
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419 else if(alloc_size-filesize < 4) alloc_size+=4; // padding for out-of-bound exec protection
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421 // Allocate space for the rom plus padding
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422 rom=(unsigned char *)malloc(alloc_size);
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423 if(rom) memset(rom+alloc_size-0x80000,0,0x80000);
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427 int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize)
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429 unsigned char *rom=NULL; int size, bytes_read;
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430 if (f==NULL) return 1;
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433 if (size <= 0) return 1;
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434 size=(size+3)&~3; // Round up to a multiple of 4
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436 // Allocate space for the rom plus padding
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437 rom=PicoCartAlloc(size);
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439 elprintf(EL_STATUS, "out of memory (wanted %i)", size);
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443 if (PicoCartLoadProgressCB != NULL)
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445 // read ROM in blocks, just for fun
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447 unsigned char *p = rom;
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451 int todo = size - bytes_read;
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452 if (todo > 256*1024) todo = 256*1024;
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453 ret = pm_read(p,todo,f);
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456 PicoCartLoadProgressCB(bytes_read * 100 / size);
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461 bytes_read = pm_read(rom,size,f); // Load up the rom
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462 if (bytes_read <= 0) {
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463 elprintf(EL_STATUS, "read failed");
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468 // maybe we are loading MegaCD BIOS?
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469 if (!(PicoMCD&1) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) || !strncmp((char *)rom+0x128, "BOOT", 4))) {
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471 rom = cd_realloc(rom, size);
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475 if ((size&0x3fff)==0x200) { DecodeSmd(rom,size); size-=0x200; } // Decode and byteswap SMD
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476 else Byteswap(rom,size); // Just byteswap
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478 if (prom) *prom=rom;
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479 if (psize) *psize=size;
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484 // Insert a cartridge:
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485 int PicoCartInsert(unsigned char *rom,unsigned int romsize)
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487 // notaz: add a 68k "jump one op back" opcode to the end of ROM.
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488 // This will hang the emu, but will prevent nasty crashes.
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489 // note: 4 bytes are padded to every ROM
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491 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped
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494 Pico.romsize=romsize;
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496 PicoMemResetHooks();
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497 PicoDmaHook = NULL;
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498 PicoResetHook = NULL;
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499 PicoLineHook = NULL;
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503 if (!(PicoMCD & 1))
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506 // setup correct memory map for loaded ROM
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507 // call PicoMemReset again due to possible memmap change
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510 else PicoMemSetup();
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513 return PicoReset(1);
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516 int PicoUnloadCart(unsigned char* romdata)
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522 static int rom_strcmp(int rom_offset, const char *s1)
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524 int i, len = strlen(s1);
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525 const char *s_rom = (const char *)Pico.rom + rom_offset;
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526 for (i = 0; i < len; i++)
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527 if (s1[i] != s_rom[i^1])
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532 static int name_cmp(const char *name)
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534 return rom_strcmp(0x150, name);
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537 /* various cart-specific things, which can't be handled by generic code */
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538 void PicoCartDetect(void)
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540 int sram_size = 0, csum;
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541 if(SRam.data) free(SRam.data); SRam.data=0;
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542 Pico.m.sram_reg = 0;
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544 csum = PicoRead32(0x18c) & 0xffff;
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546 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')
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548 if (Pico.rom[0x1B2] & 0x40)
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551 SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games
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552 SRam.end = PicoRead32(0x1B8);
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553 sram_size = 0x2000;
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554 Pico.m.sram_reg |= 4;
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557 SRam.start = PicoRead32(0x1B4) & ~0xff;
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558 SRam.end = PicoRead32(0x1B8) | 1;
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559 sram_size = SRam.end - SRam.start + 1;
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561 SRam.start &= ~0xff000000;
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562 SRam.end &= ~0xff000000;
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563 Pico.m.sram_reg |= 0x10; // SRAM was detected
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565 if (sram_size <= 0)
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567 // some games may have bad headers, like S&K and Sonic3
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568 // note: majority games use 0x200000 as starting address, but there are some which
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569 // use something else (0x300000 by HardBall '95). Luckily they have good headers.
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570 SRam.start = 0x200000;
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571 SRam.end = 0x203FFF;
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572 sram_size = 0x004000;
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577 SRam.data = (unsigned char *) calloc(sram_size, 1);
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578 if(!SRam.data) return;
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582 // set EEPROM defaults, in case it gets detected
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583 SRam.eeprom_type = 0; // 7bit (24C01)
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584 SRam.eeprom_abits = 3; // eeprom access must be odd addr for: bit0 ~ cl, bit1 ~ in
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585 SRam.eeprom_bit_cl = 1;
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586 SRam.eeprom_bit_in = 0;
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587 SRam.eeprom_bit_out= 0;
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589 // some known EEPROM data (thanks to EkeEke)
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590 if (name_cmp("COLLEGE SLAM") == 0 ||
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591 name_cmp("FRANK THOMAS BIGHURT BASEBAL") == 0)
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593 SRam.eeprom_type = 3;
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594 SRam.eeprom_abits = 2;
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595 SRam.eeprom_bit_cl = 0;
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597 else if (name_cmp("NBA JAM TOURNAMENT EDITION") == 0 ||
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598 name_cmp("NFL QUARTERBACK CLUB") == 0)
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600 SRam.eeprom_type = 2;
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601 SRam.eeprom_abits = 2;
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602 SRam.eeprom_bit_cl = 0;
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604 else if (name_cmp("NBA JAM") == 0)
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606 SRam.eeprom_type = 2;
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607 SRam.eeprom_bit_out = 1;
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608 SRam.eeprom_abits = 0;
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610 else if (name_cmp("NHLPA HOCKEY '93") == 0 ||
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611 name_cmp("NHLPA Hockey '93") == 0 ||
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612 name_cmp("RINGS OF POWER") == 0)
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614 SRam.start = SRam.end = 0x200000;
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615 Pico.m.sram_reg = 0x14;
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616 SRam.eeprom_abits = 0;
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617 SRam.eeprom_bit_cl = 6;
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618 SRam.eeprom_bit_in = 7;
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619 SRam.eeprom_bit_out= 7;
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621 else if ( name_cmp("MICRO MACHINES II") == 0 ||
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622 (name_cmp(" ") == 0 && // Micro Machines {Turbo Tournament '96, Military - It's a Blast!}
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623 (csum == 0x165e || csum == 0x168b || csum == 0xCEE0 || csum == 0x2C41)))
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625 SRam.start = 0x300000;
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626 SRam.end = 0x380001;
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627 Pico.m.sram_reg = 0x14;
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628 SRam.eeprom_type = 2;
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629 SRam.eeprom_abits = 0;
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630 SRam.eeprom_bit_cl = 1;
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631 SRam.eeprom_bit_in = 0;
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632 SRam.eeprom_bit_out= 7;
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635 // Some games malfunction if SRAM is not filled with 0xff
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636 if (name_cmp("DINO DINI'S SOCCER") == 0 ||
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637 name_cmp("MICRO MACHINES II") == 0)
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638 memset(SRam.data, 0xff, sram_size);
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640 // Unusual region 'code'
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641 if (rom_strcmp(0x1f0, "EUROPE") == 0)
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642 *(int *) (Pico.rom+0x1f0) = 0x20204520;
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645 if (name_cmp("Virtua Racing") == 0 ||
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646 name_cmp("VIRTUA RACING") == 0)
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