/* * PicoDrive * (c) Copyright Dave, 2004 * (C) notaz, 2006-2010 * * This work is licensed under the terms of MAME license. * See COPYING file in the top-level directory. */ #include "pico_int.h" #include "../cpu/debug.h" #include "../unzip/unzip.h" #include #ifdef USE_LIBRETRO_VFS #include "file_stream_transforms.h" #endif static int rom_alloc_size; static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" }; void (*PicoCartUnloadHook)(void); void (*PicoCartMemSetup)(void); void (*PicoCartLoadProgressCB)(int percent) = NULL; void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c int PicoGameLoaded; static void PicoCartDetect(const char *carthw_cfg); /* cso struct */ typedef struct _cso_struct { unsigned char in_buff[2*2048]; unsigned char out_buff[2048]; struct { char magic[4]; unsigned int unused; unsigned int total_bytes; unsigned int total_bytes_high; // ignored here unsigned int block_size; // 10h unsigned char ver; unsigned char align; unsigned char reserved[2]; } header; unsigned int fpos_in; // input file read pointer unsigned int fpos_out; // pos in virtual decompressed file int block_in_buff; // block which we have read in in_buff int pad; int index[0]; } cso_struct; static int uncompress_buf(void *dest, int destLen, void *source, int sourceLen) { z_stream stream; int err; stream.next_in = (Bytef*)source; stream.avail_in = (uInt)sourceLen; stream.next_out = dest; stream.avail_out = (uInt)destLen; stream.zalloc = NULL; stream.zfree = NULL; err = inflateInit2(&stream, -15); if (err != Z_OK) return err; err = inflate(&stream, Z_FINISH); if (err != Z_STREAM_END) { inflateEnd(&stream); return err; } //*destLen = stream.total_out; return inflateEnd(&stream); } static const char *get_ext(const char *path) { const char *ext; if (strlen(path) < 4) return ""; // no ext // allow 2 or 3 char extensions for now ext = path + strlen(path) - 2; if (ext[-1] != '.') ext--; if (ext[-1] != '.') return ""; return ext; } struct zip_file { pm_file file; ZIP *zip; struct zipent *entry; z_stream stream; unsigned char inbuf[16384]; long start; unsigned int pos; }; pm_file *pm_open(const char *path) { pm_file *file = NULL; const char *ext; FILE *f; if (path == NULL) return NULL; ext = get_ext(path); if (strcasecmp(ext, "zip") == 0) { struct zip_file *zfile = NULL; struct zipent *zipentry; ZIP *zipfile; int i, ret; zipfile = openzip(path); if (zipfile != NULL) { /* search for suitable file (right extension or large enough file) */ while ((zipentry = readzip(zipfile)) != NULL) { ext = get_ext(zipentry->name); if (zipentry->uncompressed_size >= 32*1024) goto found_rom_zip; for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++) if (strcasecmp(ext, rom_exts[i]) == 0) goto found_rom_zip; } /* zipfile given, but nothing found suitable for us inside */ goto zip_failed; found_rom_zip: zfile = calloc(1, sizeof(*zfile)); if (zfile == NULL) goto zip_failed; ret = seekcompresszip(zipfile, zipentry); if (ret != 0) goto zip_failed; ret = inflateInit2(&zfile->stream, -15); if (ret != Z_OK) { elprintf(EL_STATUS, "zip: inflateInit2 %d", ret); goto zip_failed; } zfile->zip = zipfile; zfile->entry = zipentry; zfile->start = ftell(zipfile->fp); zfile->file.file = zfile; zfile->file.size = zipentry->uncompressed_size; zfile->file.type = PMT_ZIP; strncpy(zfile->file.ext, ext, sizeof(zfile->file.ext) - 1); return &zfile->file; zip_failed: closezip(zipfile); free(zfile); return NULL; } } else if (strcasecmp(ext, "cso") == 0) { cso_struct *cso = NULL, *tmp = NULL; int size; f = fopen(path, "rb"); if (f == NULL) goto cso_failed; #ifdef __GP2X__ /* we use our own buffering */ setvbuf(f, NULL, _IONBF, 0); #endif cso = malloc(sizeof(*cso)); if (cso == NULL) goto cso_failed; if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header)) goto cso_failed; if (strncmp(cso->header.magic, "CISO", 4) != 0) { elprintf(EL_STATUS, "cso: bad header"); goto cso_failed; } if (cso->header.block_size != 2048) { elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size); goto cso_failed; } size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso); tmp = realloc(cso, size); if (tmp == NULL) goto cso_failed; cso = tmp; elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size); size -= sizeof(*cso); // index size if (fread(cso->index, 1, size, f) != size) { elprintf(EL_STATUS, "cso: premature EOF"); goto cso_failed; } // all ok cso->fpos_in = ftell(f); cso->fpos_out = 0; cso->block_in_buff = -1; file = calloc(1, sizeof(*file)); if (file == NULL) goto cso_failed; file->file = f; file->param = cso; file->size = cso->header.total_bytes; file->type = PMT_CSO; return file; cso_failed: if (cso != NULL) free(cso); if (f != NULL) fclose(f); return NULL; } /* not a zip, treat as uncompressed file */ f = fopen(path, "rb"); if (f == NULL) return NULL; file = calloc(1, sizeof(*file)); if (file == NULL) { fclose(f); return NULL; } fseek(f, 0, SEEK_END); file->file = f; file->param = NULL; file->size = ftell(f); file->type = PMT_UNCOMPRESSED; strncpy(file->ext, ext, sizeof(file->ext) - 1); fseek(f, 0, SEEK_SET); #ifdef __GP2X__ if (file->size > 0x400000) /* we use our own buffering */ setvbuf(f, NULL, _IONBF, 0); #endif return file; } size_t pm_read(void *ptr, size_t bytes, pm_file *stream) { int ret; if (stream->type == PMT_UNCOMPRESSED) { ret = fread(ptr, 1, bytes, stream->file); } else if (stream->type == PMT_ZIP) { struct zip_file *z = stream->file; if (z->entry->compression_method == 0) { int ret = fread(ptr, 1, bytes, z->zip->fp); z->pos += ret; return ret; } z->stream.next_out = ptr; z->stream.avail_out = bytes; while (z->stream.avail_out != 0) { if (z->stream.avail_in == 0) { z->stream.avail_in = fread(z->inbuf, 1, sizeof(z->inbuf), z->zip->fp); if (z->stream.avail_in == 0) break; z->stream.next_in = z->inbuf; } ret = inflate(&z->stream, Z_NO_FLUSH); if (ret == Z_STREAM_END) break; if (ret != Z_OK) { elprintf(EL_STATUS, "zip: inflate: %d", ret); return 0; } } z->pos += bytes - z->stream.avail_out; return bytes - z->stream.avail_out; } else if (stream->type == PMT_CSO) { cso_struct *cso = stream->param; int read_pos, read_len, out_offs, rret; int block = cso->fpos_out >> 11; int index = cso->index[block]; int index_end = cso->index[block+1]; unsigned char *out = ptr, *tmp_dst; ret = 0; while (bytes != 0) { out_offs = cso->fpos_out&0x7ff; if (out_offs == 0 && bytes >= 2048) tmp_dst = out; else tmp_dst = cso->out_buff; read_pos = (index&0x7fffffff) << cso->header.align; if (index < 0) { if (read_pos != cso->fpos_in) fseek(stream->file, read_pos, SEEK_SET); rret = fread(tmp_dst, 1, 2048, stream->file); cso->fpos_in = read_pos + rret; if (rret != 2048) break; } else { read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff; if (block != cso->block_in_buff) { if (read_pos != cso->fpos_in) fseek(stream->file, read_pos, SEEK_SET); rret = fread(cso->in_buff, 1, read_len, stream->file); cso->fpos_in = read_pos + rret; if (rret != read_len) { elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos); break; } cso->block_in_buff = block; } rret = uncompress_buf(tmp_dst, 2048, cso->in_buff, read_len); if (rret != 0) { elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret); break; } } rret = 2048; if (out_offs != 0 || bytes < 2048) { //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes); if (bytes < rret) rret = bytes; if (2048 - out_offs < rret) rret = 2048 - out_offs; memcpy(out, tmp_dst + out_offs, rret); } ret += rret; out += rret; cso->fpos_out += rret; bytes -= rret; block++; index = index_end; index_end = cso->index[block+1]; } } else ret = 0; return ret; } int pm_seek(pm_file *stream, long offset, int whence) { if (stream->type == PMT_UNCOMPRESSED) { fseek(stream->file, offset, whence); return ftell(stream->file); } else if (stream->type == PMT_ZIP) { struct zip_file *z = stream->file; unsigned int pos = z->pos; int ret; switch (whence) { case SEEK_CUR: pos += offset; break; case SEEK_SET: pos = offset; break; case SEEK_END: pos = stream->size - offset; break; } if (z->entry->compression_method == 0) { ret = fseek(z->zip->fp, z->start + pos, SEEK_SET); if (ret == 0) return (z->pos = pos); return -1; } offset = pos - z->pos; if (pos < z->pos) { // full decompress from the start fseek(z->zip->fp, z->start, SEEK_SET); z->stream.avail_in = 0; z->stream.next_in = z->inbuf; inflateReset(&z->stream); z->pos = 0; offset = pos; } if (PicoIn.osdMessage != NULL && offset > 4 * 1024 * 1024) PicoIn.osdMessage("Decompressing data..."); while (offset > 0) { char buf[16 * 1024]; size_t l = offset > sizeof(buf) ? sizeof(buf) : offset; ret = pm_read(buf, l, stream); if (ret != l) break; offset -= l; } return z->pos; } else if (stream->type == PMT_CSO) { cso_struct *cso = stream->param; switch (whence) { case SEEK_CUR: cso->fpos_out += offset; break; case SEEK_SET: cso->fpos_out = offset; break; case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break; } return cso->fpos_out; } else return -1; } int pm_close(pm_file *fp) { int ret = 0; if (fp == NULL) return EOF; if (fp->type == PMT_UNCOMPRESSED) { fclose(fp->file); } else if (fp->type == PMT_ZIP) { struct zip_file *z = fp->file; inflateEnd(&z->stream); closezip(z->zip); } else if (fp->type == PMT_CSO) { free(fp->param); fclose(fp->file); } else ret = EOF; free(fp); return ret; } // byteswap, data needs to be int aligned, src can match dst void Byteswap(void *dst, const void *src, int len) { const unsigned int *ps = src; unsigned int *pd = dst; int i, m; if (len < 2) return; m = 0x00ff00ff; for (i = 0; i < len / 4; i++) { unsigned int t = ps[i]; pd[i] = ((t & m) << 8) | ((t & ~m) >> 8); } } // Interleve a 16k block and byteswap static int InterleveBlock(unsigned char *dest,unsigned char *src) { int i=0; for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even return 0; } // Decode a SMD file static int DecodeSmd(unsigned char *data,int len) { unsigned char *temp=NULL; int i=0; temp=(unsigned char *)malloc(0x4000); if (temp==NULL) return 1; memset(temp,0,0x4000); // Interleve each 16k block and shift down by 0x200: for (i=0; i+0x4200<=len; i+=0x4000) { InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer memcpy(data+i,temp,0x4000); // Copy back in } free(temp); return 0; } static unsigned char *PicoCartAlloc(int filesize, int is_sms) { unsigned char *rom; if (is_sms) { // make size power of 2 for easier banking handling int s = 0, tmp = filesize; while ((tmp >>= 1) != 0) s++; if (filesize > (1 << s)) s++; rom_alloc_size = 1 << s; // be sure we can cover all address space if (rom_alloc_size < 0x10000) rom_alloc_size = 0x10000; } else { // make alloc size at least sizeof(mcd_state), // in case we want to switch to CD mode if (filesize < sizeof(mcd_state)) filesize = sizeof(mcd_state); // align to 512K for memhandlers rom_alloc_size = (filesize + 0x7ffff) & ~0x7ffff; } if (rom_alloc_size - filesize < 4) rom_alloc_size += 4; // padding for out-of-bound exec protection // Allocate space for the rom plus padding // use special address for 32x dynarec rom = plat_mmap(0x02000000, rom_alloc_size, 0, 0); return rom; } int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms) { unsigned char *rom; int size, bytes_read; if (f == NULL) return 1; size = f->size; if (size <= 0) return 1; size = (size+3)&~3; // Round up to a multiple of 4 // Allocate space for the rom plus padding rom = PicoCartAlloc(size, is_sms); if (rom == NULL) { elprintf(EL_STATUS, "out of memory (wanted %i)", size); return 2; } if (PicoCartLoadProgressCB != NULL) { // read ROM in blocks, just for fun int ret; unsigned char *p = rom; bytes_read=0; do { int todo = size - bytes_read; if (todo > 256*1024) todo = 256*1024; ret = pm_read(p,todo,f); bytes_read += ret; p += ret; PicoCartLoadProgressCB(bytes_read * 100 / size); } while (ret > 0); } else bytes_read = pm_read(rom,size,f); // Load up the rom if (bytes_read <= 0) { elprintf(EL_STATUS, "read failed"); plat_munmap(rom, rom_alloc_size); return 3; } if (!is_sms) { // maybe we are loading MegaCD BIOS? if (!(PicoIn.AHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) || !strncmp((char *)rom+0x128, "BOOT", 4))) { PicoIn.AHW |= PAHW_MCD; } // Check for SMD: if (size >= 0x4200 && (size&0x3fff) == 0x200 && ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) { elprintf(EL_STATUS, "SMD format detected."); DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD } else Byteswap(rom, rom, size); // Just byteswap } else { if (size >= 0x4200 && (size&0x3fff) == 0x200) { elprintf(EL_STATUS, "SMD format detected."); // at least here it's not interleaved size -= 0x200; memmove(rom, rom + 0x200, size); } } if (prom) *prom = rom; if (psize) *psize = size; return 0; } // Insert a cartridge: int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg) { // notaz: add a 68k "jump one op back" opcode to the end of ROM. // This will hang the emu, but will prevent nasty crashes. // note: 4 bytes are padded to every ROM if (rom != NULL) *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped Pico.rom=rom; Pico.romsize=romsize; if (Pico.sv.data) { free(Pico.sv.data); Pico.sv.data = NULL; } if (PicoCartUnloadHook != NULL) { PicoCartUnloadHook(); PicoCartUnloadHook = NULL; } pdb_cleanup(); PicoIn.AHW &= PAHW_MCD|PAHW_SMS; PicoCartMemSetup = NULL; PicoDmaHook = NULL; PicoResetHook = NULL; PicoLineHook = NULL; PicoLoadStateHook = NULL; carthw_chunks = NULL; if (!(PicoIn.AHW & (PAHW_MCD|PAHW_SMS))) PicoCartDetect(carthw_cfg); // setup correct memory map for loaded ROM switch (PicoIn.AHW) { default: elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoIn.AHW); case 0: case PAHW_SVP: PicoMemSetup(); break; case PAHW_MCD: PicoMemSetupCD(); break; case PAHW_PICO: PicoMemSetupPico(); break; case PAHW_SMS: PicoMemSetupMS(); break; } if (PicoCartMemSetup != NULL) PicoCartMemSetup(); if (PicoIn.AHW & PAHW_SMS) PicoPowerMS(); else PicoPower(); PicoGameLoaded = 1; return 0; } int PicoCartResize(int newsize) { void *tmp = plat_mremap(Pico.rom, rom_alloc_size, newsize); if (tmp == NULL) return -1; Pico.rom = tmp; rom_alloc_size = newsize; return 0; } void PicoCartUnload(void) { if (PicoCartUnloadHook != NULL) { PicoCartUnloadHook(); PicoCartUnloadHook = NULL; } if (PicoIn.AHW & PAHW_32X) PicoUnload32x(); if (Pico.rom != NULL) { SekFinishIdleDet(); plat_munmap(Pico.rom, rom_alloc_size); Pico.rom = NULL; } PicoGameLoaded = 0; } static unsigned int rom_crc32(void) { unsigned int crc; elprintf(EL_STATUS, "caclulating CRC32.."); // have to unbyteswap for calculation.. Byteswap(Pico.rom, Pico.rom, Pico.romsize); crc = crc32(0, Pico.rom, Pico.romsize); Byteswap(Pico.rom, Pico.rom, Pico.romsize); return crc; } static int rom_strcmp(int rom_offset, const char *s1) { int i, len = strlen(s1); const char *s_rom = (const char *)Pico.rom; if (rom_offset + len > Pico.romsize) return 0; for (i = 0; i < len; i++) if (s1[i] != s_rom[(i + rom_offset) ^ 1]) return 1; return 0; } static unsigned int rom_read32(int addr) { unsigned short *m = (unsigned short *)(Pico.rom + addr); return (m[0] << 16) | m[1]; } static char *sskip(char *s) { while (*s && isspace_(*s)) s++; return s; } static void rstrip(char *s) { char *p; for (p = s + strlen(s) - 1; p >= s; p--) if (isspace_(*p)) *p = 0; } static int parse_3_vals(char *p, int *val0, int *val1, int *val2) { char *r; *val0 = strtoul(p, &r, 0); if (r == p) goto bad; p = sskip(r); if (*p++ != ',') goto bad; *val1 = strtoul(p, &r, 0); if (r == p) goto bad; p = sskip(r); if (*p++ != ',') goto bad; *val2 = strtoul(p, &r, 0); if (r == p) goto bad; return 1; bad: return 0; } static int is_expr(const char *expr, char **pr) { int len = strlen(expr); char *p = *pr; if (strncmp(expr, p, len) != 0) return 0; p = sskip(p + len); if (*p != '=') return 0; // wrong or malformed *pr = sskip(p + 1); return 1; } #include "carthw_cfg.c" static void parse_carthw(const char *carthw_cfg, int *fill_sram, int *hw_detected) { int line = 0, any_checks_passed = 0, skip_sect = 0; const char *s, *builtin = builtin_carthw_cfg; int tmp, rom_crc = 0; char buff[256], *p, *r; FILE *f; f = fopen(carthw_cfg, "r"); if (f == NULL) f = fopen("pico/carthw.cfg", "r"); if (f == NULL) elprintf(EL_STATUS, "couldn't open carthw.cfg!"); for (;;) { if (f != NULL) { p = fgets(buff, sizeof(buff), f); if (p == NULL) break; } else { if (*builtin == 0) break; for (s = builtin; *s != 0 && *s != '\n'; s++) ; while (*s == '\n') s++; tmp = s - builtin; if (tmp > sizeof(buff) - 1) tmp = sizeof(buff) - 1; memcpy(buff, builtin, tmp); buff[tmp] = 0; p = buff; builtin = s; } line++; p = sskip(p); if (*p == 0 || *p == '#') continue; if (*p == '[') { any_checks_passed = 0; skip_sect = 0; continue; } if (skip_sect) continue; /* look for checks */ if (is_expr("check_str", &p)) { int offs; offs = strtoul(p, &r, 0); if (offs < 0 || offs > Pico.romsize) { elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs); goto bad; } p = sskip(r); if (*p != ',') goto bad; p = sskip(p + 1); if (*p != '"') goto bad; p++; r = strchr(p, '"'); if (r == NULL) goto bad; *r = 0; if (rom_strcmp(offs, p) == 0) any_checks_passed = 1; else skip_sect = 1; continue; } else if (is_expr("check_size_gt", &p)) { int size; size = strtoul(p, &r, 0); if (r == p || size < 0) goto bad; if (Pico.romsize > size) any_checks_passed = 1; else skip_sect = 1; continue; } else if (is_expr("check_csum", &p)) { int csum; csum = strtoul(p, &r, 0); if (r == p || (csum & 0xffff0000)) goto bad; if (csum == (rom_read32(0x18c) & 0xffff)) any_checks_passed = 1; else skip_sect = 1; continue; } else if (is_expr("check_crc32", &p)) { unsigned int crc; crc = strtoul(p, &r, 0); if (r == p) goto bad; if (rom_crc == 0) rom_crc = rom_crc32(); if (crc == rom_crc) any_checks_passed = 1; else skip_sect = 1; continue; } /* now time for actions */ if (is_expr("hw", &p)) { if (!any_checks_passed) goto no_checks; *hw_detected = 1; rstrip(p); if (strcmp(p, "svp") == 0) PicoSVPStartup(); else if (strcmp(p, "pico") == 0) PicoInitPico(); else if (strcmp(p, "prot") == 0) carthw_sprot_startup(); else if (strcmp(p, "ssf2_mapper") == 0) carthw_ssf2_startup(); else if (strcmp(p, "x_in_1_mapper") == 0) carthw_Xin1_startup(); else if (strcmp(p, "realtec_mapper") == 0) carthw_realtec_startup(); else if (strcmp(p, "radica_mapper") == 0) carthw_radica_startup(); else if (strcmp(p, "piersolar_mapper") == 0) carthw_pier_startup(); else if (strcmp(p, "prot_lk3") == 0) carthw_prot_lk3_startup(); else { elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p); skip_sect = 1; *hw_detected = 0; } continue; } if (is_expr("sram_range", &p)) { int start, end; if (!any_checks_passed) goto no_checks; rstrip(p); start = strtoul(p, &r, 0); if (r == p) goto bad; p = sskip(r); if (*p != ',') goto bad; p = sskip(p + 1); end = strtoul(p, &r, 0); if (r == p) goto bad; if (((start | end) & 0xff000000) || start > end) { elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end); goto bad_nomsg; } Pico.sv.start = start; Pico.sv.end = end; continue; } else if (is_expr("prop", &p)) { if (!any_checks_passed) goto no_checks; rstrip(p); if (strcmp(p, "no_sram") == 0) Pico.sv.flags &= ~SRF_ENABLED; else if (strcmp(p, "no_eeprom") == 0) Pico.sv.flags &= ~SRF_EEPROM; else if (strcmp(p, "filled_sram") == 0) *fill_sram = 1; else if (strcmp(p, "force_6btn") == 0) PicoIn.quirks |= PQUIRK_FORCE_6BTN; else { elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p); goto bad_nomsg; } elprintf(EL_STATUS, "game prop: %s", p); continue; } else if (is_expr("eeprom_type", &p)) { int type; if (!any_checks_passed) goto no_checks; rstrip(p); type = strtoul(p, &r, 0); if (r == p || type < 0) goto bad; Pico.sv.eeprom_type = type; Pico.sv.flags |= SRF_EEPROM; continue; } else if (is_expr("eeprom_lines", &p)) { int scl, sda_in, sda_out; if (!any_checks_passed) goto no_checks; rstrip(p); if (!parse_3_vals(p, &scl, &sda_in, &sda_out)) goto bad; if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 || sda_out < 0 || sda_out > 15) goto bad; Pico.sv.eeprom_bit_cl = scl; Pico.sv.eeprom_bit_in = sda_in; Pico.sv.eeprom_bit_out= sda_out; continue; } else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) { int addr, mask, val; if (!any_checks_passed) goto no_checks; rstrip(p); if (!parse_3_vals(p, &addr, &mask, &val)) goto bad; carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0); continue; } bad: elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff); bad_nomsg: skip_sect = 1; continue; no_checks: elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff); skip_sect = 1; continue; } if (f != NULL) fclose(f); } /* * various cart-specific things, which can't be handled by generic code */ static void PicoCartDetect(const char *carthw_cfg) { int carthw_detected = 0; int fill_sram = 0; memset(&Pico.sv, 0, sizeof(Pico.sv)); if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A') { Pico.sv.start = rom_read32(0x1B4) & ~0xff000001; // align Pico.sv.end = (rom_read32(0x1B8) & ~0xff000000) | 1; if (Pico.rom[0x1B2] & 0x40) // EEPROM Pico.sv.flags |= SRF_EEPROM; Pico.sv.flags |= SRF_ENABLED; } if (Pico.sv.end == 0 || Pico.sv.start > Pico.sv.end) { // some games may have bad headers, like S&K and Sonic3 // note: majority games use 0x200000 as starting address, but there are some which // use something else (0x300000 by HardBall '95). Luckily they have good headers. Pico.sv.start = 0x200000; Pico.sv.end = 0x203FFF; Pico.sv.flags |= SRF_ENABLED; } // set EEPROM defaults, in case it gets detected Pico.sv.eeprom_type = 0; // 7bit (24C01) Pico.sv.eeprom_bit_cl = 1; Pico.sv.eeprom_bit_in = 0; Pico.sv.eeprom_bit_out= 0; if (carthw_cfg != NULL) parse_carthw(carthw_cfg, &fill_sram, &carthw_detected); // assume the standard mapper for large roms if (!carthw_detected && Pico.romsize > 0x400000) carthw_ssf2_startup(); if (Pico.sv.flags & SRF_ENABLED) { if (Pico.sv.flags & SRF_EEPROM) Pico.sv.size = 0x2000; else Pico.sv.size = Pico.sv.end - Pico.sv.start + 1; Pico.sv.data = calloc(Pico.sv.size, 1); if (Pico.sv.data == NULL) Pico.sv.flags &= ~SRF_ENABLED; if (Pico.sv.eeprom_type == 1) // 1 == 0 in PD EEPROM code Pico.sv.eeprom_type = 0; } if ((Pico.sv.flags & SRF_ENABLED) && fill_sram) { elprintf(EL_STATUS, "SRAM fill"); memset(Pico.sv.data, 0xff, Pico.sv.size); } // Unusual region 'code' if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0) *(int *) (Pico.rom + 0x1f0) = 0x20204520; } // vim:shiftwidth=2:expandtab