mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2025-02-02 21:22:40 +01:00
[Core/CD] added CD-AUDIO & CD+G support
This commit is contained in:
EkeEke
parent
1ee664873e
commit
a07f7a3d24
@ -514,7 +514,7 @@ void sms_cart_init(void)
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if (config.bios & 1)
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{
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/* load BIOS file */
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int bios_size = load_bios();
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int bios_size = load_bios(system_hw);
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if (bios_size > 0xC000)
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{
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584
core/cd_hw/cdd.c
584
core/cd_hw/cdd.c
@ -43,6 +43,12 @@
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#define SUPPORTED_EXT 10
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#endif
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/* CD blocks scanning speed */
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#define CD_SCAN_SPEED 30
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/* CD tracks type (CD-DA by default) */
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#define TYPE_CDROM 0x01
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/* BCD conversion lookup tables */
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static const uint8 lut_BCD_8[100] =
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{
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@ -246,14 +252,18 @@ int cdd_context_load(uint8 *state)
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lba = cdd.toc.tracks[cdd.index].start;
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}
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/* seek to current subcode position */
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if (cdd.toc.sub)
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{
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/* 96 bytes per sector */
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fseek(cdd.toc.sub, lba * 96, SEEK_SET);
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}
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/* seek to current track position */
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if (!cdd.index)
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if (cdd.toc.tracks[cdd.index].type)
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{
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/* DATA track */
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if (cdd.toc.tracks[0].fd)
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{
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fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
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}
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fseek(cdd.toc.tracks[cdd.index].fd, lba * cdd.sectorSize, SEEK_SET);
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}
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#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
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else if (cdd.toc.tracks[cdd.index].vf.seekable)
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@ -277,153 +287,109 @@ int cdd_context_load(uint8 *state)
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int cdd_load(char *filename, char *header)
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{
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char fname[256];
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char fname[256+10];
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char line[128];
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char *ptr = 0;
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char *lptr = 0;
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char *ptr, *lptr;
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FILE *fd;
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/* assume CD image file by default */
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int isCDfile = 1;
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/* first unmount any loaded disc */
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cdd_unload();
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/* open file */
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fd = fopen(filename, "rb");
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if (!fd) return (-1);
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/* save a copy of base filename */
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strncpy(fname, filename, 256);
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/* autodetect .cue file */
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if (!memcmp(".cue", &filename[strlen(filename) - 4], 4) || !memcmp(".CUE", &filename[strlen(filename) - 4], 4))
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/* check loaded file extension */
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if (memcmp(".cue", &filename[strlen(filename) - 4], 4) && memcmp(".CUE", &filename[strlen(filename) - 4], 4))
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{
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if (fd)
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{
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/* find first FILE command */
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while (!lptr)
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{
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if (fgets(line, 128, fd) == NULL)
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{
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break;
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}
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lptr = strstr(line, "FILE");
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}
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/* get BINARY file name */
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if (lptr && strstr(line, " BINARY"))
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{
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/* skip "FILE" attribute */
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lptr += 4;
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/* skip DOUBLE QUOTE or SPACE characters */
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while ((*lptr == 0x20) || (*lptr == '\"')) lptr++;
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/* set pointer at the end of filepath */
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ptr = fname + strlen(fname) - 1;
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while ((ptr - fname) && (*ptr != '/') && (*ptr != '\\')) ptr--;
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if (ptr - fname) ptr++;
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/* append filename characters after filepath */
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while ((*lptr != '\"') && memcmp(lptr, " BINARY", 7) && (ptr < (fname + 255)))
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{
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*ptr++ = *lptr++;
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}
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*ptr = 0;
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/* open file & initialize DATA track file descriptor */
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cdd.toc.tracks[0].fd = fopen(fname, "rb");
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}
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else
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{
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/* close .cue file */
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fclose(fd);
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/* invalid .cue file */
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return -1;
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}
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}
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}
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else
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{
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/* initialize DATA track file descriptor */
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cdd.toc.tracks[0].fd = fd;
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/* automatically try to open associated .cue file */
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strncpy(&fname[strlen(fname) - 4], ".cue", 4);
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fd = fopen(fname, "rb");
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}
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if (!cdd.toc.tracks[0].fd)
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{
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/* close any opened .cue file */
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if (fd) fclose(fd);
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/* error opening file */
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return -1;
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}
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int len;
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/* read first 16 bytes */
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fread(header, 0x10, 1, cdd.toc.tracks[0].fd);
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fread(header, 0x10, 1, fd);
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/* look for valid CD image ID string */
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if (memcmp("SEGADISCSYSTEM", header, 14))
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/* look for valid CD image identifier */
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if (!memcmp("SEGADISCSYSTEM", header, 14))
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{
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/* if not found, read next 16 bytes */
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fread(header, 0x10, 1, cdd.toc.tracks[0].fd);
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/* look again for valid CD image ID string */
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if (memcmp("SEGADISCSYSTEM", header, 14))
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{
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/* close any opened .cue file */
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if (fd) fclose(fd);
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/* close binary file */
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fclose(cdd.toc.tracks[0].fd);
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cdd.toc.tracks[0].fd = 0;
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/* not a CD image file */
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return 0;
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}
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/* BIN format (2352 bytes data blocks) */
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cdd.sectorSize = 2352;
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/* COOKED format (2048 bytes data blocks) */
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cdd.sectorSize = 2048;
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}
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else
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{
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/* ISO format (2048 bytes data blocks) */
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cdd.sectorSize = 2048;
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/* read next 16 bytes */
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fread(header, 0x10, 1, fd);
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/* look for valid CD image identifier */
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if (!memcmp("SEGADISCSYSTEM", header, 14))
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{
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/* RAW format (2352 bytes data blocks) */
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cdd.sectorSize = 2352;
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}
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}
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/* valid CD image file ? */
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if (cdd.sectorSize)
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{
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/* read CD image header + security code */
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fread(header + 0x10, 0x200, 1, cdd.toc.tracks[0].fd);
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fread(header + 0x10, 0x200, 1, fd);
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/* DATA track start time (based on DATA file length) */
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fseek(cdd.toc.tracks[0].fd, 0, SEEK_END);
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cdd.toc.tracks[0].end = ftell(cdd.toc.tracks[0].fd) / cdd.sectorSize;
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/* initialize first track file descriptor */
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cdd.toc.tracks[0].fd = fd;
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/* DATA track start time (logical block 0) */
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fseek(cdd.toc.tracks[0].fd, 0, SEEK_SET);
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/* this is a valid DATA track */
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cdd.toc.tracks[0].type = TYPE_CDROM;
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/* DATA track end LBA (based on DATA file length) */
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fseek(fd, 0, SEEK_END);
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cdd.toc.tracks[0].end = ftell(fd) / cdd.sectorSize;
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/* DATA track start LBA (logical block 0) */
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fseek(fd, 0, SEEK_SET);
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cdd.toc.tracks[0].start = 0;
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/* initialize TOC */
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cdd.toc.end = cdd.toc.tracks[0].end;
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cdd.toc.last = 1;
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}
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else
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{
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/* this is not a CD image file */
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isCDfile = 0;
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/* automatically retrieve audio tracks infos from .cue file */
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/* close file */
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fclose(fd);
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}
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/* automatically try to mount CD associated CUE file */
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len = strlen(fname);
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while ((len && (fname[len] != '.')) || (len > 251)) len--;
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strcpy(&fname[len], ".cue");
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fd = fopen(fname, "rb");
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}
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/* parse CUE file */
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if (fd)
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{
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int pregap = 0;
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int mm, ss, bb;
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int mm, ss, bb, pregap = 0;
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/* skip first (DATA) track */
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while (!strstr(line, "INDEX 01") && !strstr(line, "INDEX 1"))
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/* DATA track already loaded ? */
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if (cdd.toc.last)
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{
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if (fgets(line, 128, fd) == NULL)
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/* skip first track */
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while (fgets(line, 128, fd))
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{
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if (strstr(line, "INDEX 01") && !strstr(line, "INDEX 1"))
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break;
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}
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}
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/* read next lines until end of file */
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while (fgets(line, 128, fd) != NULL)
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/* read lines until end of file */
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while (fgets(line, 128, fd))
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{
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/* skip any SPACE characters */
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lptr = line;
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@ -432,25 +398,34 @@ int cdd_load(char *filename, char *header)
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/* decode FILE commands */
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if (!(memcmp(lptr, "FILE", 4)))
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{
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/* skip "FILE" attribute */
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lptr += 4;
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/* skip DOUBLE QUOTE or SPACE characters */
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while ((*lptr == 0x20) || (*lptr == '\"')) lptr++;
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/* set pointer at the end of filepath */
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/* retrieve current path */
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ptr = fname + strlen(fname) - 1;
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while ((ptr - fname) && (*ptr != '/') && (*ptr != '\\')) ptr--;
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if (ptr - fname) ptr++;
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/* append filename characters after filepath */
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while ((*lptr != '\"') && (lptr <= (line + 128)) && (ptr < (fname + 255)))
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/* skip "FILE" attribute */
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lptr += 4;
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/* skip SPACE characters */
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while (*lptr == 0x20) lptr++;
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/* retrieve full filename */
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if (*lptr == '\"')
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{
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/* skip first DOUBLE QUOTE character */
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lptr++;
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while ((*lptr != '\"') && (lptr <= (line + 128)) && (ptr < (fname + 255)))
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*ptr++ = *lptr++;
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}
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else
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{
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/* no DOUBLE QUOTE used */
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while ((*lptr != 0x20) && (lptr <= (line + 128)) && (ptr < (fname + 255)))
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*ptr++ = *lptr++;
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}
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*ptr = 0;
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/* open file & initialize track file descriptor */
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/* open current track file descriptor */
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cdd.toc.tracks[cdd.toc.last].fd = fopen(fname, "rb");
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if (!cdd.toc.tracks[cdd.toc.last].fd)
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{
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@ -461,11 +436,11 @@ int cdd_load(char *filename, char *header)
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/* reset current file PREGAP length */
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pregap = 0;
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/* reset current file read offset */
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/* reset current track file read offset */
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cdd.toc.tracks[cdd.toc.last].offset = 0;
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/* check supported file types */
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if (!strstr(lptr,"BINARY"))
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/* check supported audio file types */
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if (!strstr(lptr,"BINARY") && !strstr(lptr,"MOTOROLA"))
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{
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/* read file header */
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unsigned char head[32];
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@ -473,7 +448,7 @@ int cdd_load(char *filename, char *header)
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fread(head, 32, 1, cdd.toc.tracks[cdd.toc.last].fd);
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fseek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_SET);
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/* autodetect WAVE file header (16-bit stereo @44.1kHz only) */
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/* autodetect WAVE file header (44.1KHz 16-bit stereo format only) */
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if (!memcmp(head, waveHeader, 32))
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{
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/* adjust current track file read offset with WAVE header length */
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@ -504,7 +479,7 @@ int cdd_load(char *filename, char *header)
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}
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/* decode TRACK commands */
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else if ((sscanf(lptr, "TRACK %02d AUDIO", &bb)) || (sscanf(lptr, "TRACK %d AUDIO", &bb)))
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else if ((sscanf(lptr, "TRACK %02d %*s", &bb)) || (sscanf(lptr, "TRACK %d %*s", &bb)))
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{
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/* check track number */
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if (bb != (cdd.toc.last + 1))
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@ -520,13 +495,44 @@ int cdd_load(char *filename, char *header)
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break;
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}
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/* check if a single file is used for all tracks */
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/* autodetect DATA track (first track only) */
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if (!cdd.toc.last)
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{
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/* CD-ROM Mode 1 support only */
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if (strstr(lptr,"MODE1/2048"))
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{
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/* COOKED format (2048 bytes / block) */
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cdd.sectorSize = 2048;
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}
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else if (strstr(lptr,"MODE1/2352"))
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{
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/* RAW format (2352 bytes / block) */
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cdd.sectorSize = 2352;
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/* skip 16-byte header */
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fseek(cdd.toc.tracks[0].fd, 0x10, SEEK_SET);
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}
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if (cdd.sectorSize)
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{
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/* this is a valid DATA track */
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cdd.toc.tracks[0].type = TYPE_CDROM;
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/* read CD image header + security code */
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fread(header, 0x210, 1, cdd.toc.tracks[0].fd);
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fseek(cdd.toc.tracks[0].fd, 0, SEEK_SET);
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}
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}
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else
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{
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/* check if same file is used for consecutive tracks */
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if (!cdd.toc.tracks[cdd.toc.last].fd)
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{
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/* clear previous track end time */
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cdd.toc.tracks[cdd.toc.last - 1].end = 0;
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}
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}
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}
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/* decode PREGAP commands */
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else if (sscanf(lptr, "PREGAP %02d:%02d:%02d", &mm, &ss, &bb) == 3)
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@ -539,41 +545,41 @@ int cdd_load(char *filename, char *header)
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else if ((sscanf(lptr, "INDEX 00 %02d:%02d:%02d", &mm, &ss, &bb) == 3) ||
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(sscanf(lptr, "INDEX 0 %02d:%02d:%02d", &mm, &ss, &bb) == 3))
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{
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/* check if a single file is used for all tracks */
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if (!cdd.toc.tracks[cdd.toc.last].fd)
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/* check if previous track end time needs to be set */
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if (cdd.toc.last && !cdd.toc.tracks[cdd.toc.last - 1].end)
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{
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/* set previous track end time */
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/* set previous track end time (current file absolute time + PREGAP length) */
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cdd.toc.tracks[cdd.toc.last - 1].end = bb + ss*75 + mm*60*75 + pregap;
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}
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}
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else if ((sscanf(lptr, "INDEX 01 %02d:%02d:%02d", &mm, &ss, &bb) == 3) ||
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(sscanf(lptr, "INDEX 1 %02d:%02d:%02d", &mm, &ss, &bb) == 3))
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{
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/* adjust file read offset for current track with current file PREGAP length */
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/* adjust current track file read offset with current file PREGAP length (only used for AUDIO track) */
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cdd.toc.tracks[cdd.toc.last].offset += pregap * 2352;
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/* check if a single file is used for all tracks */
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/* check if a single file is used for consecutive tracks */
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if (!cdd.toc.tracks[cdd.toc.last].fd)
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{
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/* use common file descriptor */
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cdd.toc.tracks[cdd.toc.last].fd = cdd.toc.tracks[0].fd;
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/* current track start time (based on current absolute time) */
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/* current track start time (based on current file absolute time + PREGAP length) */
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cdd.toc.tracks[cdd.toc.last].start = bb + ss*75 + mm*60*75 + pregap;
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/* check if previous track end time has not been already set (through INDEX00 command) */
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if (cdd.toc.tracks[cdd.toc.last - 1].end == 0)
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/* check if previous track end time needs to be set */
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if (cdd.toc.last && !cdd.toc.tracks[cdd.toc.last - 1].end)
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{
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/* set previous track end time (based on current absolute timee) */
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cdd.toc.tracks[cdd.toc.last - 1].end = bb + ss*75 + mm*60*75;
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/* set previous track end time (based on current track start time, ignoring any "PREGAP"-type pause if no INDEX00) */
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cdd.toc.tracks[cdd.toc.last - 1].end = cdd.toc.tracks[cdd.toc.last].start;
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}
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}
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else
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{
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/* current track start time (based on previous track end time) */
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/* current track start time (based on previous track end time + current file absolute time + PREGAP length) */
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cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end + bb + ss*75 + mm*60*75 + pregap;
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/* adjust file read offset with previous track end time */
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/* adjust current track file read offset with previous track end time (only used for AUDIO track) */
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cdd.toc.tracks[cdd.toc.last].offset += cdd.toc.end * 2352;
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#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
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@ -605,7 +611,16 @@ int cdd_load(char *filename, char *header)
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{
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/* current track end time */
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fseek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_END);
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if (cdd.toc.tracks[cdd.toc.last].type)
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{
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/* DATA track length */
|
||||
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ((ftell(cdd.toc.tracks[cdd.toc.last].fd) + cdd.sectorSize - 1) / cdd.sectorSize);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* AUDIO track length */
|
||||
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ((ftell(cdd.toc.tracks[cdd.toc.last].fd) + 2351) / 2352);
|
||||
}
|
||||
fseek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_SET);
|
||||
}
|
||||
|
||||
@ -615,36 +630,50 @@ int cdd_load(char *filename, char *header)
|
||||
|
||||
/* increment track number */
|
||||
cdd.toc.last++;
|
||||
|
||||
/* max. 99 tracks */
|
||||
if (cdd.toc.last == 99) break;
|
||||
}
|
||||
}
|
||||
|
||||
/* check if a single file is used for all tracks */
|
||||
if (cdd.toc.tracks[cdd.toc.last - 1].fd == cdd.toc.tracks[0].fd)
|
||||
/* check if last track end time needs to be set */
|
||||
if (cdd.toc.last && !cdd.toc.tracks[cdd.toc.last - 1].end)
|
||||
{
|
||||
/* adjust TOC end */
|
||||
/* adjust TOC end with current file PREGAP length */
|
||||
cdd.toc.end += pregap;
|
||||
|
||||
/* last track end index */
|
||||
/* last track end time */
|
||||
cdd.toc.tracks[cdd.toc.last - 1].end = cdd.toc.end;
|
||||
}
|
||||
|
||||
/* close .cue file */
|
||||
fclose(fd);
|
||||
/* close any incomplete track file */
|
||||
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
||||
if (cdd.toc.tracks[cdd.toc.last].vf.datasource)
|
||||
{
|
||||
ov_clear(&cdd.toc.tracks[cdd.toc.last].vf);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
if (cdd.toc.tracks[cdd.toc.last].fd)
|
||||
{
|
||||
fclose(cdd.toc.tracks[cdd.toc.last].fd);
|
||||
}
|
||||
|
||||
/* .ISO audio tracks auto-detection */
|
||||
else if (cdd.sectorSize == 2048)
|
||||
/* close CUE file */
|
||||
fclose(fd);
|
||||
}
|
||||
else
|
||||
{
|
||||
int i, offset;
|
||||
int i, offset = 1;
|
||||
|
||||
/* set pointer at the end of filename */
|
||||
ptr = fname + strlen(fname) - 4;
|
||||
|
||||
/* auto-detect track file extensions */
|
||||
/* autodetect audio track file extensions */
|
||||
for (i=0; i<SUPPORTED_EXT; i++)
|
||||
{
|
||||
/* auto-detect bad rips with wrong track indexes */
|
||||
sprintf(ptr, extensions[i], 1);
|
||||
/* auto-detect wrong initial track index */
|
||||
sprintf(ptr, extensions[i], cdd.toc.last);
|
||||
fd = fopen(fname, "rb");
|
||||
if (fd)
|
||||
{
|
||||
@ -652,13 +681,9 @@ int cdd_load(char *filename, char *header)
|
||||
break;
|
||||
}
|
||||
|
||||
sprintf(ptr, extensions[i], 2);
|
||||
sprintf(ptr, extensions[i], cdd.toc.last + 1);
|
||||
fd = fopen(fname, "rb");
|
||||
if (fd)
|
||||
{
|
||||
offset = 1;
|
||||
break;
|
||||
}
|
||||
if (fd) break;
|
||||
}
|
||||
|
||||
/* repeat until no more valid track files can be found */
|
||||
@ -670,7 +695,7 @@ int cdd_load(char *filename, char *header)
|
||||
fread(head, 32, 1, fd);
|
||||
fseek(fd, 0, SEEK_SET);
|
||||
|
||||
/* check if this is a valid WAVE file (16-bit stereo @44.1kHz only) */
|
||||
/* check if this is a valid WAVE file (44.1KHz 16-bit stereo format only) */
|
||||
if (!memcmp(head, waveHeader, 32))
|
||||
{
|
||||
/* initialize current track file descriptor */
|
||||
@ -684,7 +709,7 @@ int cdd_load(char *filename, char *header)
|
||||
|
||||
/* current track end time */
|
||||
fseek(fd, 0, SEEK_END);
|
||||
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ((ftell(fd) + 2351) / 2352);
|
||||
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ((ftell(fd) - 44 + 2351) / 2352);
|
||||
|
||||
/* initialize file read offset for current track */
|
||||
cdd.toc.tracks[cdd.toc.last].offset = cdd.toc.tracks[cdd.toc.last].start * 2352;
|
||||
@ -731,7 +756,7 @@ int cdd_load(char *filename, char *header)
|
||||
cdd.toc.tracks[cdd.toc.last].start += 150;
|
||||
|
||||
/* current track end time */
|
||||
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ov_pcm_total(&cdd.toc.tracks[cdd.toc.last].vf,-1)/588;
|
||||
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ((ov_pcm_total(&cdd.toc.tracks[cdd.toc.last].vf,-1) + 587) / 588);
|
||||
if (cdd.toc.tracks[cdd.toc.last].end <= cdd.toc.tracks[cdd.toc.last].start)
|
||||
{
|
||||
/* invalid file length */
|
||||
@ -779,16 +804,31 @@ int cdd_load(char *filename, char *header)
|
||||
break;
|
||||
}
|
||||
|
||||
/* max. 99 tracks */
|
||||
if (cdd.toc.last == 99) break;
|
||||
|
||||
/* try to open next audio track file */
|
||||
sprintf(ptr, extensions[i], cdd.toc.last + offset);
|
||||
fd = fopen(fname, "rb");
|
||||
}
|
||||
}
|
||||
|
||||
/* Simulate audio tracks if none found */
|
||||
/* CD tracks found ? */
|
||||
if (cdd.toc.last)
|
||||
{
|
||||
/* Lead-out */
|
||||
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
||||
|
||||
/* CD mounted */
|
||||
cdd.loaded = 1;
|
||||
|
||||
/* Valid DATA track found ? */
|
||||
if (cdd.toc.tracks[0].type)
|
||||
{
|
||||
/* simulate audio tracks if none found */
|
||||
if (cdd.toc.last == 1)
|
||||
{
|
||||
/* Some games require exact TOC infos */
|
||||
/* some games require exact TOC infos */
|
||||
if (strstr(header + 0x180,"T-95035") != NULL)
|
||||
{
|
||||
/* Snatcher */
|
||||
@ -880,13 +920,18 @@ int cdd_load(char *filename, char *header)
|
||||
while ((cdd.toc.last < 99) && (cdd.toc.end < 56*60*75));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Lead-out */
|
||||
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
||||
/* Automatically try to open associated subcode data file */
|
||||
strncpy(&fname[strlen(fname) - 4], ".sub", 4);
|
||||
cdd.toc.sub = fopen(fname, "rb");
|
||||
|
||||
/* CD loaded */
|
||||
cdd.loaded = 1;
|
||||
return 1;
|
||||
/* return 1 if loaded file is CD image file */
|
||||
return (isCDfile);
|
||||
}
|
||||
|
||||
/* no CD image file loaded */
|
||||
return 0;
|
||||
}
|
||||
|
||||
void cdd_unload(void)
|
||||
@ -901,24 +946,29 @@ void cdd_unload(void)
|
||||
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
||||
if (cdd.toc.tracks[i].vf.datasource)
|
||||
{
|
||||
/* close VORBIS file (if still opened) */
|
||||
/* close any opened VORBIS file */
|
||||
ov_clear(&cdd.toc.tracks[i].vf);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
if (cdd.toc.tracks[i].fd)
|
||||
{
|
||||
/* check if single file is used for consecutive tracks */
|
||||
if ((i > 0) && (cdd.toc.tracks[i].fd == cdd.toc.tracks[i-1].fd))
|
||||
{
|
||||
/* skip track */
|
||||
i++;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* close file */
|
||||
fclose(cdd.toc.tracks[i].fd);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* detect single file images */
|
||||
if (cdd.toc.tracks[i+1].fd == cdd.toc.tracks[i].fd)
|
||||
{
|
||||
/* exit loop */
|
||||
i = cdd.toc.last;
|
||||
}
|
||||
}
|
||||
}
|
||||
/* close any opened subcode file */
|
||||
if (cdd.toc.sub) fclose(cdd.toc.sub);
|
||||
|
||||
/* CD unloaded */
|
||||
cdd.loaded = 0;
|
||||
@ -927,19 +977,24 @@ void cdd_unload(void)
|
||||
/* reset TOC */
|
||||
memset(&cdd.toc, 0x00, sizeof(cdd.toc));
|
||||
|
||||
/* unknown CD image file format */
|
||||
/* no CD-ROM track */
|
||||
cdd.sectorSize = 0;
|
||||
}
|
||||
|
||||
void cdd_read_data(uint8 *dst)
|
||||
{
|
||||
/* only read DATA track sectors */
|
||||
if ((cdd.lba >= 0) && (cdd.lba < cdd.toc.tracks[0].end))
|
||||
/* only allow reading (first) CD-ROM track sectors */
|
||||
if (cdd.toc.tracks[cdd.index].type && (cdd.lba >= 0))
|
||||
{
|
||||
/* BIN format ? */
|
||||
if (cdd.sectorSize == 2352)
|
||||
/* seek current track sector */
|
||||
if (cdd.sectorSize == 2048)
|
||||
{
|
||||
/* skip 16-byte header */
|
||||
/* Mode 1 COOKED data (ISO) */
|
||||
fseek(cdd.toc.tracks[0].fd, cdd.lba * 2048, SEEK_SET);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Mode 1 RAW data (skip 16-byte header) */
|
||||
fseek(cdd.toc.tracks[0].fd, cdd.lba * 2352 + 16, SEEK_SET);
|
||||
}
|
||||
|
||||
@ -1109,6 +1164,48 @@ void cdd_read_audio(unsigned int samples)
|
||||
blip_end_frame(snd.blips[2][1], samples);
|
||||
}
|
||||
|
||||
static void cdd_read_subcode(void)
|
||||
{
|
||||
uint8 subc[96];
|
||||
int i,j,index;
|
||||
|
||||
/* update subcode buffer pointer address */
|
||||
scd.regs[0x68>>1].byte.l = (scd.regs[0x68>>1].byte.l + 98) & 0x7e;
|
||||
|
||||
/* 16-bit register index */
|
||||
index = (scd.regs[0x68>>1].byte.l + 0x100) >> 1;
|
||||
|
||||
/* read interleaved subcode data from .sub file (12 x 8-bit of P subchannel first, then Q subchannel, etc) */
|
||||
fread(subc, 1, 96, cdd.toc.sub);
|
||||
|
||||
/* convert back to raw subcode format (96 bytes with 8 x P-W subchannel bits per byte) */
|
||||
for (i=0; i<96; i+=2)
|
||||
{
|
||||
int code = 0;
|
||||
for (j=0; j<8; j++)
|
||||
{
|
||||
int bits = (subc[(j*12)+(i/8)] >> (6 - (i & 6))) & 3;
|
||||
code |= ((bits & 1) << (7 - j));
|
||||
code |= ((bits >> 1) << (15 - j));
|
||||
}
|
||||
|
||||
/* subcode buffer is accessed as 16-bit words */
|
||||
scd.regs[index].w = code;
|
||||
|
||||
/* subcode buffer is limited to 64 x 16-bit words */
|
||||
index = (index + 1) & 0xbf;
|
||||
}
|
||||
|
||||
/* level 6 interrupt enabled ? */
|
||||
if (scd.regs[0x32>>1].byte.l & 0x40)
|
||||
{
|
||||
/* trigger level 6 interrupt */
|
||||
scd.pending |= (1 << 6);
|
||||
|
||||
/* update IRQ level */
|
||||
s68k_update_irq((scd.pending & scd.regs[0x32>>1].byte.l) >> 1);
|
||||
}
|
||||
}
|
||||
|
||||
void cdd_update(void)
|
||||
{
|
||||
@ -1140,10 +1237,23 @@ void cdd_update(void)
|
||||
return;
|
||||
}
|
||||
|
||||
/* track type */
|
||||
if (!cdd.index)
|
||||
/* end of disc detection */
|
||||
if (cdd.index >= cdd.toc.last)
|
||||
{
|
||||
/* DATA sector header (CD-ROM Mode 1) */
|
||||
cdd.status = CD_END;
|
||||
return;
|
||||
}
|
||||
|
||||
/* subcode data processing */
|
||||
if (cdd.toc.sub)
|
||||
{
|
||||
cdd_read_subcode();
|
||||
}
|
||||
|
||||
/* track type */
|
||||
if (cdd.toc.tracks[cdd.index].type)
|
||||
{
|
||||
/* CD-ROM (Mode 1) sector header */
|
||||
uint8 header[4];
|
||||
uint32 msf = cdd.lba + 150;
|
||||
header[0] = lut_BCD_8[(msf / 75) / 60];
|
||||
@ -1151,10 +1261,10 @@ void cdd_update(void)
|
||||
header[2] = lut_BCD_8[(msf % 75)];
|
||||
header[3] = 0x01;
|
||||
|
||||
/* data track sector read is controlled by CDC */
|
||||
cdd.lba += cdc_decoder_update(*(uint32 *)(header));
|
||||
/* decode CD-ROM track sector */
|
||||
cdc_decoder_update(*(uint32 *)(header));
|
||||
}
|
||||
else if (cdd.index < cdd.toc.last)
|
||||
else
|
||||
{
|
||||
/* check against audio track start index */
|
||||
if (cdd.lba >= cdd.toc.tracks[cdd.index].start)
|
||||
@ -1165,16 +1275,10 @@ void cdd_update(void)
|
||||
|
||||
/* audio blocks are still sent to CDC as well as CD DAC/Fader */
|
||||
cdc_decoder_update(0);
|
||||
}
|
||||
|
||||
/* next audio block is automatically read */
|
||||
/* read next sector */
|
||||
cdd.lba++;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* end of disc */
|
||||
cdd.status = CD_END;
|
||||
return;
|
||||
}
|
||||
|
||||
/* check end of current track */
|
||||
if (cdd.lba >= cdd.toc.tracks[cdd.index].end)
|
||||
@ -1231,16 +1335,25 @@ void cdd_update(void)
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* next track */
|
||||
cdd.index++;
|
||||
|
||||
/* skip directly to track start position */
|
||||
cdd.lba = cdd.toc.tracks[cdd.index].start;
|
||||
|
||||
/* AUDIO track playing ? */
|
||||
if (cdd.status == CD_PLAY)
|
||||
/* check disc limits */
|
||||
if (cdd.index < cdd.toc.last)
|
||||
{
|
||||
scd.regs[0x36>>1].byte.h = 0x00;
|
||||
/* skip directly to next track start position */
|
||||
cdd.lba = cdd.toc.tracks[cdd.index].start;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* end of disc */
|
||||
cdd.lba = cdd.toc.end;
|
||||
cdd.status = CD_END;
|
||||
|
||||
/* no AUDIO track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
return;
|
||||
}
|
||||
}
|
||||
else if (cdd.lba < cdd.toc.tracks[cdd.index].start)
|
||||
@ -1255,37 +1368,34 @@ void cdd_update(void)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* check disc limits */
|
||||
if (cdd.index > 0)
|
||||
{
|
||||
/* previous track */
|
||||
cdd.index--;
|
||||
|
||||
/* skip directly to track end position */
|
||||
/* skip directly to previous track end position */
|
||||
cdd.lba = cdd.toc.tracks[cdd.index].end;
|
||||
}
|
||||
|
||||
/* check disc limits */
|
||||
if (cdd.index < 0)
|
||||
else
|
||||
{
|
||||
cdd.index = 0;
|
||||
/* start of first track */
|
||||
cdd.lba = 0;
|
||||
}
|
||||
else if (cdd.index >= cdd.toc.last)
|
||||
{
|
||||
/* no AUDIO track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* end of disc */
|
||||
cdd.index = cdd.toc.last;
|
||||
cdd.lba = cdd.toc.end;
|
||||
cdd.status = CD_END;
|
||||
return;
|
||||
}
|
||||
|
||||
/* seek to current block */
|
||||
if (!cdd.index)
|
||||
{
|
||||
/* no AUDIO track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
/* AUDIO track playing ? */
|
||||
scd.regs[0x36>>1].byte.h = cdd.toc.tracks[cdd.index].type;
|
||||
|
||||
/* seek to current subcode position */
|
||||
if (cdd.toc.sub)
|
||||
{
|
||||
fseek(cdd.toc.sub, cdd.lba * 96, SEEK_SET);
|
||||
}
|
||||
|
||||
/* seek to current track position */
|
||||
if (cdd.toc.tracks[cdd.index].type)
|
||||
{
|
||||
/* DATA track */
|
||||
fseek(cdd.toc.tracks[0].fd, cdd.lba * cdd.sectorSize, SEEK_SET);
|
||||
}
|
||||
@ -1366,7 +1476,7 @@ void cdd_process(void)
|
||||
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
||||
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
||||
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
||||
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type << 2; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1377,7 +1487,7 @@ void cdd_process(void)
|
||||
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
||||
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
||||
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
||||
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type << 2; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1420,12 +1530,8 @@ void cdd_process(void)
|
||||
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
||||
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
||||
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
||||
scd.regs[0x3e>>1].byte.h |= (cdd.toc.tracks[track-1].type << 3); /* RS6 bit 3 is set for CD-ROM track */
|
||||
scd.regs[0x40>>1].byte.h = track % 10; /* Track Number (low digit) */
|
||||
if (track == 1)
|
||||
{
|
||||
/* RS6 bit 3 is set for the first (DATA) track */
|
||||
scd.regs[0x3e>>1].byte.h |= 0x08;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1510,8 +1616,14 @@ void cdd_process(void)
|
||||
lba = cdd.toc.tracks[index].start;
|
||||
}
|
||||
|
||||
/* seek to current block */
|
||||
if (!index)
|
||||
/* seek to current subcode position */
|
||||
if (cdd.toc.sub)
|
||||
{
|
||||
fseek(cdd.toc.sub, lba * 96, SEEK_SET);
|
||||
}
|
||||
|
||||
/* seek to current track position */
|
||||
if (cdd.toc.tracks[index].type)
|
||||
{
|
||||
/* DATA track */
|
||||
fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
|
||||
@ -1603,7 +1715,7 @@ void cdd_process(void)
|
||||
}
|
||||
|
||||
/* seek to current block */
|
||||
if (!index)
|
||||
if (cdd.toc.tracks[index].type)
|
||||
{
|
||||
/* DATA track */
|
||||
fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
|
||||
@ -1621,6 +1733,12 @@ void cdd_process(void)
|
||||
fseek(cdd.toc.tracks[index].fd, (lba * 2352) - cdd.toc.tracks[index].offset, SEEK_SET);
|
||||
}
|
||||
|
||||
/* seek to current subcode position */
|
||||
if (cdd.toc.sub)
|
||||
{
|
||||
fseek(cdd.toc.sub, lba * 96, SEEK_SET);
|
||||
}
|
||||
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
|
||||
@ -58,9 +58,6 @@
|
||||
#define CD_STOP 0x09
|
||||
#define CD_END 0x0C
|
||||
|
||||
/* CD blocks scanning speed */
|
||||
#define CD_SCAN_SPEED 30
|
||||
|
||||
#define CD_MAX_TRACKS 100
|
||||
|
||||
/* CD track */
|
||||
@ -73,6 +70,7 @@ typedef struct
|
||||
int offset;
|
||||
int start;
|
||||
int end;
|
||||
int type;
|
||||
} track_t;
|
||||
|
||||
/* CD TOC */
|
||||
@ -81,6 +79,7 @@ typedef struct
|
||||
int end;
|
||||
int last;
|
||||
track_t tracks[CD_MAX_TRACKS];
|
||||
FILE *sub;
|
||||
} toc_t;
|
||||
|
||||
/* CDD hardware */
|
||||
|
||||
@ -573,6 +573,13 @@ static unsigned int scd_read_byte(unsigned int address)
|
||||
s68k_poll_detect(1 << (address & 0x1f));
|
||||
}
|
||||
|
||||
/* Subcode buffer */
|
||||
else if (address >= 0xff8100)
|
||||
{
|
||||
/* 64 x 16-bit mirrored */
|
||||
address &= 0x17f;
|
||||
}
|
||||
|
||||
/* default registers */
|
||||
if (address & 1)
|
||||
{
|
||||
@ -663,6 +670,13 @@ static unsigned int scd_read_word(unsigned int address)
|
||||
s68k_poll_detect(3 << (address & 0x1e));
|
||||
}
|
||||
|
||||
/* Subcode buffer */
|
||||
else if (address >= 0xff8100)
|
||||
{
|
||||
/* 64 x 16-bit mirrored */
|
||||
address &= 0x17f;
|
||||
}
|
||||
|
||||
/* default registers */
|
||||
return scd.regs[(address >> 1) & 0xff].w;
|
||||
}
|
||||
|
||||
145
core/loadrom.c
145
core/loadrom.c
@ -2,7 +2,7 @@
|
||||
* Genesis Plus
|
||||
* ROM Loading Support
|
||||
*
|
||||
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald (original code)
|
||||
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
|
||||
* Copyright (C) 2007-2015 Eke-Eke (Genesis Plus GX)
|
||||
*
|
||||
* Redistribution and use of this code or any derivative works are permitted
|
||||
@ -389,11 +389,11 @@ void getrominfo(char *romheader)
|
||||
* Return loaded size (-1 if already loaded)
|
||||
*
|
||||
***************************************************************************/
|
||||
int load_bios(void)
|
||||
int load_bios(int system)
|
||||
{
|
||||
int size = 0;
|
||||
|
||||
switch (system_hw)
|
||||
switch (system)
|
||||
{
|
||||
case SYSTEM_MCD:
|
||||
{
|
||||
@ -532,10 +532,11 @@ int load_rom(char *filename)
|
||||
int i, size;
|
||||
|
||||
#ifdef USE_DYNAMIC_ALLOC
|
||||
/* allocate memory for Cartridge /CD hardware buffer if required */
|
||||
if (ext == NULL)
|
||||
if (!ext)
|
||||
{
|
||||
/* allocate memory for Cartridge / CD hardware if required */
|
||||
ext = (external_t *)malloc(sizeof(external_t));
|
||||
if (!ext) return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -550,30 +551,28 @@ int load_rom(char *filename)
|
||||
cdd.loaded = 0;
|
||||
}
|
||||
|
||||
/* auto-detect CD image files */
|
||||
/* auto-detect CD image file */
|
||||
size = cdd_load(filename, (char *)(cart.rom));
|
||||
if (size < 0)
|
||||
{
|
||||
/* error opening file */
|
||||
return 0;
|
||||
return (0);
|
||||
}
|
||||
|
||||
if (size > 0)
|
||||
/* CD image file ? */
|
||||
if (size)
|
||||
{
|
||||
/* CD image file loaded */
|
||||
/* enable CD hardware */
|
||||
system_hw = SYSTEM_MCD;
|
||||
|
||||
/* boot from CD hardware */
|
||||
scd.cartridge.boot = 0x00;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* load file into ROM buffer */
|
||||
char extension[4];
|
||||
size = load_archive(filename, cart.rom, sizeof(cart.rom), extension);
|
||||
if (!size)
|
||||
{
|
||||
/* mark all BOOTROM as unloaded since they could have been overwritten */
|
||||
system_bios &= ~(0x10 | SYSTEM_SMS | SYSTEM_GG);
|
||||
return 0;
|
||||
}
|
||||
size = load_archive(filename, cart.rom, cdd.loaded ? 0x800000 : MAXROMSIZE, extension);
|
||||
|
||||
/* mark BOOTROM as unloaded if they have been overwritten by cartridge ROM */
|
||||
if (size > 0x800000)
|
||||
@ -586,8 +585,16 @@ int load_rom(char *filename)
|
||||
/* Master System or Game Gear BIOS ROM are loaded within $400000-$4FFFFF area */
|
||||
system_bios &= ~(SYSTEM_SMS | SYSTEM_GG);
|
||||
}
|
||||
else if (size <= 0)
|
||||
{
|
||||
/* mark all BOOTROM as unloaded since they could have been overwritten */
|
||||
system_bios &= ~(0x10 | SYSTEM_SMS | SYSTEM_GG);
|
||||
|
||||
/* convert lower case to upper case */
|
||||
/* error loading file */
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* convert lower case file extension to upper case */
|
||||
*(uint32 *)(extension) &= 0xdfdfdfdf;
|
||||
|
||||
/* auto-detect system hardware from ROM file extension */
|
||||
@ -608,7 +615,7 @@ int load_rom(char *filename)
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Mega Drive hardware (Genesis mode) */
|
||||
/* default is Mega Drive / Genesis hardware (16-bit mode) */
|
||||
system_hw = SYSTEM_MD;
|
||||
|
||||
/* decode .MDX format */
|
||||
@ -641,7 +648,7 @@ int load_rom(char *filename)
|
||||
size -= 512;
|
||||
memcpy (cart.rom, cart.rom + 512, size);
|
||||
|
||||
/* assume interleaved Genesis ROM format (.smd) */
|
||||
/* assume interleaved Mega Drive / Genesis ROM format (.smd) */
|
||||
if (system_hw == SYSTEM_MD)
|
||||
{
|
||||
for (i = 0; i < (size / 0x4000); i++)
|
||||
@ -661,26 +668,9 @@ int load_rom(char *filename)
|
||||
/* set console region */
|
||||
get_region((char *)(cart.rom));
|
||||
|
||||
/* CD image file */
|
||||
if (system_hw == SYSTEM_MCD)
|
||||
{
|
||||
/* load CD BOOT ROM */
|
||||
if (!load_bios())
|
||||
{
|
||||
/* unmount CD image */
|
||||
cdd_unload();
|
||||
|
||||
/* error loading CD BOOT ROM */
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* boot from CD */
|
||||
scd.cartridge.boot = 0x00;
|
||||
}
|
||||
|
||||
#ifdef LSB_FIRST
|
||||
/* 16-bit ROM specific */
|
||||
else if (system_hw == SYSTEM_MD)
|
||||
if (system_hw == SYSTEM_MD)
|
||||
{
|
||||
/* Byteswap ROM to optimize 16-bit access */
|
||||
for (i = 0; i < cart.romsize; i += 2)
|
||||
@ -702,13 +692,27 @@ int load_rom(char *filename)
|
||||
/* Save auto-detected system hardware */
|
||||
romtype = system_hw;
|
||||
|
||||
/* CD image file */
|
||||
if (system_hw == SYSTEM_MCD)
|
||||
{
|
||||
/* try to load CD BOOTROM for selected region */
|
||||
if (!load_bios(SYSTEM_MCD))
|
||||
{
|
||||
/* unmount CD image */
|
||||
cdd_unload();
|
||||
|
||||
/* error booting from CD */
|
||||
return (0);
|
||||
}
|
||||
}
|
||||
|
||||
/* CD BOOTROM */
|
||||
if (strstr(rominfo.ROMType, "BR") != NULL)
|
||||
else if (strstr(rominfo.ROMType, "BR") != NULL)
|
||||
{
|
||||
/* enable CD hardware */
|
||||
system_hw = SYSTEM_MCD;
|
||||
|
||||
/* boot from CD */
|
||||
/* boot from CD hardware */
|
||||
scd.cartridge.boot = 0x00;
|
||||
|
||||
/* copy ROM to BOOTROM area */
|
||||
@ -721,7 +725,26 @@ int load_rom(char *filename)
|
||||
system_bios = (system_bios & 0xf0) | (region_code >> 4);
|
||||
}
|
||||
|
||||
/* ROM cartridges with CD support */
|
||||
/* ROM cartridge with CD loaded */
|
||||
else if (cdd.loaded)
|
||||
{
|
||||
/* try to load CD BOOTROM */
|
||||
if (load_bios(SYSTEM_MCD))
|
||||
{
|
||||
/* enable CD hardware */
|
||||
system_hw = SYSTEM_MCD;
|
||||
|
||||
/* boot from cartridge */
|
||||
scd.cartridge.boot = 0x40;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* unmount CD image */
|
||||
cdd_unload();
|
||||
}
|
||||
}
|
||||
|
||||
/* ROM cartridge with CD support */
|
||||
else if ((strstr(rominfo.domestic,"FLUX") != NULL) ||
|
||||
(strstr(rominfo.domestic,"WONDER LIBRARY") != NULL) ||
|
||||
(strstr(rominfo.product,"T-5740") != NULL))
|
||||
@ -729,33 +752,23 @@ int load_rom(char *filename)
|
||||
/* check if console hardware is set to AUTO */
|
||||
if (!config.system)
|
||||
{
|
||||
/* auto-enable CD hardware */
|
||||
system_hw = SYSTEM_MCD;
|
||||
|
||||
/* try to load CD BOOTROM */
|
||||
if (load_bios())
|
||||
if (load_bios(SYSTEM_MCD))
|
||||
{
|
||||
char fname[256];
|
||||
int len = strlen(filename);
|
||||
|
||||
/* automatically try to load associated .iso file */
|
||||
while ((len && (filename[len] != '.')) || (len > 251)) len--;
|
||||
strncpy(fname, filename, len);
|
||||
strcpy(&fname[len], ".iso");
|
||||
cdd_load(fname, (char *)cdc.ram);
|
||||
|
||||
/* enable CD hardware */
|
||||
system_hw = SYSTEM_MCD;
|
||||
|
||||
/* boot from cartridge */
|
||||
scd.cartridge.boot = 0x40;
|
||||
|
||||
/* change ROM filename extension to .iso */
|
||||
while (len && (filename[len-1] != '.')) len--;
|
||||
if (len < 253)
|
||||
{
|
||||
strncpy(fname, filename, len);
|
||||
strcpy(&fname[len], "iso");
|
||||
}
|
||||
|
||||
/* automatically load associated .iso image */
|
||||
cdd_load(fname, (char *)cdc.ram);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* if not found, disable CD hardware */
|
||||
system_hw = SYSTEM_MD;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -980,19 +993,19 @@ void get_region(char *romheader)
|
||||
if (system_hw == SYSTEM_MCD)
|
||||
{
|
||||
/* security code */
|
||||
switch (romheader[0x20b])
|
||||
switch ((unsigned char)romheader[0x20b])
|
||||
{
|
||||
case 0x7a:
|
||||
region_code = REGION_USA;
|
||||
break;
|
||||
|
||||
case 0x64:
|
||||
region_code = REGION_EUROPE;
|
||||
break;
|
||||
|
||||
default:
|
||||
case 0xa1:
|
||||
region_code = REGION_JAPAN_NTSC;
|
||||
break;
|
||||
|
||||
default:
|
||||
region_code = REGION_USA;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
* Genesis Plus
|
||||
* ROM Loading Support
|
||||
*
|
||||
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald (original code)
|
||||
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
|
||||
* Copyright (C) 2007-2015 Eke-Eke (Genesis Plus GX)
|
||||
*
|
||||
* Redistribution and use of this code or any derivative works are permitted
|
||||
@ -64,7 +64,7 @@ extern ROMINFO rominfo;
|
||||
extern uint8 romtype;
|
||||
|
||||
/* Function prototypes */
|
||||
extern int load_bios(void);
|
||||
extern int load_bios(int system);
|
||||
extern int load_rom(char *filename);
|
||||
extern void get_region(char *romheader);
|
||||
extern char *get_company(void);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user