diff options
Diffstat (limited to 'src/mess/tools/imgtool/modules/pc_hard.c')
-rw-r--r-- | src/mess/tools/imgtool/modules/pc_hard.c | 470 |
1 files changed, 0 insertions, 470 deletions
diff --git a/src/mess/tools/imgtool/modules/pc_hard.c b/src/mess/tools/imgtool/modules/pc_hard.c deleted file mode 100644 index 915032932c7..00000000000 --- a/src/mess/tools/imgtool/modules/pc_hard.c +++ /dev/null @@ -1,470 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Raphael Nabet -/**************************************************************************** - - pc_hard.c - - PC hard drives - -***************************************************************************** - - Master boot record format: - - Offset Length Description - ------ ------ ----------- - 0 446 Boot machine code - 446 16 Partion #1 info - 462 16 Partion #2 info - 478 16 Partion #3 info - 494 16 Partion #4 info - 510 2 Magic bytes (0x55 0xAA) - - - Partition info format: - - Offset Length Description - ------ ------ ----------- - 0 1 Bootable (0x80=bootable 0x00=not bootable) - 1 1 Starting head - 2 1 Starting sector (bits 5-0) and high bits of starting track (bits 6-5) - 3 1 Low bits of starting track - 4 1 Partition type: - 0x00 Unused - 0x?1 FAT12 (0-15 MB) - 0x?2 XENIX - 0x?4 FAT16 (16-32 MB) - 0x?6 FAT16` (32 MB-2 GB) - 0x?7 HPFS or NTFS - 0x?A Boot Manager - 0x?B FAT32 (512 MB-2 TB) - 0x?C FAT32 (512 MB-2 TB LBA) - 0x1? OS/2 Boot manager/Win95 hidden - 0xC? DR-DOS secured partition - 0xD? Multiuser DOS secured partition - 0xE? SpeedStor extended partition - 5 1 Ending head - 6 1 Ending sector (bits 5-0) and high bits of ending track (bits 6-5) - 7 1 Low bits of ending track - 8 4 Sector index of beginning of partition - 12 4 Total sectors in partition - -****************************************************************************/ -#include "imgtool.h" -#include "formats/imageutl.h" -#include "imghd.h" - -#define FAT_SECLEN 512 - -static OPTION_GUIDE_START( pc_chd_create_optionguide ) - OPTION_INT('T', "cylinders", "Cylinders" ) - OPTION_INT('H', "heads", "Heads" ) - OPTION_INT('S', "sectors", "Sectors" ) -OPTION_GUIDE_END - -static const char pc_chd_create_optionspec[] = "H1-[16]S1-[32]-63T10/20/30/40/50/60/70/80/90/[100]/110/120/130/140/150/160/170/180/190/200"; - -static const char fat8_string[8] = { 'F', 'A', 'T', ' ', ' ', ' ', ' ', ' ' }; -static const char fat12_string[8] = { 'F', 'A', 'T', '1', '2', ' ', ' ', ' ' }; -static const char fat16_string[8] = { 'F', 'A', 'T', '1', '6', ' ', ' ', ' ' }; -//static const char fat32_string[8] = { 'F', 'A', 'T', '3', '2', ' ', ' ', ' ' }; - -/* imports from fat.c */ -extern void fat_get_info(const imgtool_class *imgclass, UINT32 state, union imgtoolinfo *info); - - -struct pc_chd_image_info -{ - struct mess_hard_disk_file hard_disk; - - struct - { - unsigned int corrupt : 1; - UINT8 partition_type; - UINT32 fat_bits; - UINT32 starting_track; - UINT32 starting_head; - UINT32 starting_sector; - UINT32 ending_track; - UINT32 ending_head; - UINT32 ending_sector; - UINT32 sector_index; - UINT32 total_sectors; - } partitions[4]; -}; - - - -static pc_chd_image_info *pc_chd_get_image_info(imgtool_image *image) -{ - return (pc_chd_image_info *) imgtool_image_extra_bytes(image); -} - - - -static void pc_chd_locate_block(imgtool_image *image, UINT64 block, UINT32 *cylinder, UINT32 *head, UINT32 *sector) -{ - pc_chd_image_info *info; - const hard_disk_info *hd_info; - - info = pc_chd_get_image_info(image); - hd_info = imghd_get_header(&info->hard_disk); - - *sector = block % hd_info->sectors; - *head = (block / hd_info->sectors) % hd_info->heads; - *cylinder = block / hd_info->sectors / hd_info->heads; -} - - - -static imgtoolerr_t pc_chd_partition_create(imgtool_image *image, int partition_index, UINT64 first_block, UINT64 block_count) -{ - imgtoolerr_t err; - UINT8 header_block[FAT_SECLEN]; - UINT8 partition_block[FAT_SECLEN]; - UINT8 partition_type; - UINT8 *fat_type; - UINT8 *partition_entry; - UINT32 first_cylinder, first_head, first_sector; - UINT32 last_cylinder, last_head, last_sector; - imgtool_class imgclass = { fat_get_info }; - imgtoolerr_t (*fat_partition_create)(imgtool_image *image, UINT64 first_block, UINT64 block_count); - - /* sanity checks */ - assert((partition_index >= 0) && (partition_index <= 3)); - - /* compute geometry */ - pc_chd_locate_block(image, first_block, &first_cylinder, &first_head, &first_sector); - pc_chd_locate_block(image, first_block + block_count - 1, &last_cylinder, &last_head, &last_sector); - - /* load fat_partition_create */ - fat_partition_create = (imgtoolerr_t (*)(imgtool_image *, UINT64, UINT64)) - imgtool_get_info_fct(&imgclass, IMGTOOLINFO_PTR_CREATE_PARTITION); - - /* first create the actual partition */ - err = fat_partition_create(image, first_block, block_count); - if (err) - goto done; - - /* read the first block of the partition, to determine the type of FAT */ - err = imgtool_image_read_block(image, first_block, partition_block); - if (err) - goto done; - fat_type = &partition_block[54]; - if (!memcmp(fat_type, fat8_string, sizeof(fat8_string))) - partition_type = 0x01; - else if (!memcmp(fat_type, fat12_string, sizeof(fat12_string))) - partition_type = 0x01; - else if ((!memcmp(fat_type, fat16_string, sizeof(fat16_string))) && (block_count < 32*1024*1024/FAT_SECLEN)) - partition_type = 0x04; - else if ((!memcmp(fat_type, fat16_string, sizeof(fat16_string))) && (block_count >= 32*1024*1024/FAT_SECLEN)) - partition_type = 0x06; - else - partition_type = 0x0B; - - /* read the partition header */ - err = imgtool_image_read_block(image, 0, header_block); - if (err) - goto done; - - /* fill out the partition entry */ - partition_entry = &header_block[446 + (partition_index * 16)]; - place_integer_le(partition_entry, 0, 1, 0x80); - place_integer_le(partition_entry, 1, 1, first_head); - place_integer_le(partition_entry, 2, 1, ((first_sector & 0x3F) | (first_cylinder >> 8 << 2))); - place_integer_le(partition_entry, 3, 1, first_cylinder); - place_integer_le(partition_entry, 4, 1, partition_type); - place_integer_le(partition_entry, 5, 1, last_head); - place_integer_le(partition_entry, 6, 1, ((last_sector & 0x3F) | (last_cylinder >> 8 << 2))); - place_integer_le(partition_entry, 7, 1, last_cylinder); - place_integer_le(partition_entry, 8, 4, first_block); - place_integer_le(partition_entry, 12, 4, block_count); - - /* write the partition header */ - err = imgtool_image_write_block(image, 0, header_block); - if (err) - goto done; - -done: - return err; -} - - - -static imgtoolerr_t pc_chd_read_partition_header(imgtool_image *image) -{ - imgtoolerr_t err; - int i; - const UINT8 *partition_info; - pc_chd_image_info *info; - UINT8 buffer[FAT_SECLEN]; - - info = pc_chd_get_image_info(image); - - /* read the initial block */ - err = imgtool_image_read_block(image, 0, buffer); - if (err) - return err; - - /* magic bytes present? */ - if ((buffer[510] != 0x55) || (buffer[511] != 0xAA)) - return IMGTOOLERR_CORRUPTIMAGE; - - for (i = 0; i < ARRAY_LENGTH(info->partitions); i++) - { - partition_info = &buffer[446 + i * 16]; - - info->partitions[i].partition_type = partition_info[4]; - info->partitions[i].starting_head = partition_info[1]; - info->partitions[i].starting_track = ((partition_info[2] << 2) & 0xFF00) | partition_info[3]; - info->partitions[i].starting_sector = partition_info[2] & 0x3F; - info->partitions[i].ending_head = partition_info[5]; - info->partitions[i].ending_track = ((partition_info[6] << 2) & 0xFF00) | partition_info[7]; - info->partitions[i].ending_sector = partition_info[6] & 0x3F; - - info->partitions[i].sector_index = pick_integer_le(partition_info, 8, 4); - info->partitions[i].total_sectors = pick_integer_le(partition_info, 12, 4); - - if (info->partitions[i].starting_track > info->partitions[i].ending_track) - return IMGTOOLERR_CORRUPTIMAGE; - } - return IMGTOOLERR_SUCCESS; -} - - - -static imgtoolerr_t pc_chd_image_create(imgtool_image *image, imgtool_stream *f, option_resolution *opts) -{ - imgtoolerr_t err; - UINT32 cylinders, heads, sectors; - pc_chd_image_info *info; - UINT8 header_block[FAT_SECLEN]; - - cylinders = option_resolution_lookup_int(opts, 'T'); - heads = option_resolution_lookup_int(opts, 'H'); - sectors = option_resolution_lookup_int(opts, 'S'); - - info = pc_chd_get_image_info(image); - - /* create the hard disk image */ - err = imghd_create(f, 0, cylinders, heads, sectors, FAT_SECLEN); - if (err) - goto done; - - err = imghd_open(f, &info->hard_disk); - if (err) - goto done; - - /* set up partition header block */ - memset(header_block, 0, sizeof(header_block)); - header_block[510] = 0x55; - header_block[511] = 0xAA; - err = imgtool_image_write_block(image, 0, header_block); - if (err) - goto done; - - err = pc_chd_partition_create(image, 0, 1, cylinders * heads * sectors - 1); - if (err) - goto done; - - err = pc_chd_read_partition_header(image); - if (err) - goto done; - -done: - if (err) - imghd_close(&info->hard_disk); - return err; -} - - - -static imgtoolerr_t pc_chd_image_open(imgtool_image *image, imgtool_stream *stream) -{ - imgtoolerr_t err; - pc_chd_image_info *info; - - info = pc_chd_get_image_info(image); - - /* open the hard drive */ - err = imghd_open(stream, &info->hard_disk); - if (err) - return err; - - err = pc_chd_read_partition_header(image); - if (err) - return err; - - return IMGTOOLERR_SUCCESS; -} - - - -static void pc_chd_image_close(imgtool_image *image) -{ - pc_chd_image_info *info; - info = pc_chd_get_image_info(image); - imghd_close(&info->hard_disk); -} - - - -static imgtoolerr_t pc_chd_image_get_geometry(imgtool_image *image, UINT32 *tracks, UINT32 *heads, UINT32 *sectors) -{ - pc_chd_image_info *info; - const hard_disk_info *hd_info; - - info = pc_chd_get_image_info(image); - hd_info = imghd_get_header(&info->hard_disk); - - *tracks = hd_info->cylinders; - *heads = hd_info->heads; - *sectors = hd_info->sectors; - return IMGTOOLERR_SUCCESS; -} - - - -static imgtoolerr_t pc_chd_image_getsectorsize(imgtool_image *image, UINT32 track, UINT32 head, UINT32 sector, UINT32 *sector_size) -{ - pc_chd_image_info *info; - info = pc_chd_get_image_info(image); - *sector_size = imghd_get_header(&info->hard_disk)->sectorbytes; - return IMGTOOLERR_SUCCESS; -} - - - -static UINT32 pc_chd_calc_lbasector(pc_chd_image_info *info, UINT32 track, UINT32 head, UINT32 sector) -{ - UINT32 lbasector; - const hard_disk_info *hd_info; - - hd_info = imghd_get_header(&info->hard_disk); - lbasector = track; - lbasector *= hd_info->heads; - lbasector += head; - lbasector *= hd_info->sectors; - lbasector += sector; - return lbasector; -} - - - -static imgtoolerr_t pc_chd_image_readsector(imgtool_image *image, UINT32 track, UINT32 head, UINT32 sector, void *buffer, size_t len) -{ - pc_chd_image_info *info; - info = pc_chd_get_image_info(image); - return imghd_read(&info->hard_disk, - pc_chd_calc_lbasector(info, track, head, sector), - buffer); -} - - - -static imgtoolerr_t pc_chd_image_writesector(imgtool_image *image, UINT32 track, UINT32 head, UINT32 sector, const void *buffer, size_t len, int ddam) -{ - pc_chd_image_info *info; - info = pc_chd_get_image_info(image); - return imghd_write(&info->hard_disk, - pc_chd_calc_lbasector(info, track, head, sector), - buffer); -} - - - -static imgtoolerr_t pc_chd_image_readblock(imgtool_image *image, void *buffer, UINT64 block) -{ - pc_chd_image_info *info; - info = pc_chd_get_image_info(image); - return imghd_read(&info->hard_disk, block, buffer); -} - - - -static imgtoolerr_t pc_chd_image_writeblock(imgtool_image *image, const void *buffer, UINT64 block) -{ - pc_chd_image_info *info; - info = pc_chd_get_image_info(image); - return imghd_write(&info->hard_disk, block, buffer); -} - - - -static imgtoolerr_t pc_chd_list_partitions(imgtool_image *image, imgtool_partition_info *partitions, size_t len) -{ - pc_chd_image_info *info; - size_t i; - - info = pc_chd_get_image_info(image); - - for (i = 0; i < MIN(4, len); i++) - { - partitions[i].base_block = info->partitions[i].sector_index; - partitions[i].block_count = info->partitions[i].total_sectors; - - switch(info->partitions[i].partition_type) - { - case 0x00: /* Empty Partition */ - partitions[i].get_info = NULL; - break; - - case 0x01: /* FAT12 */ - case 0x04: /* FAT16 (-32 MB) */ - case 0x06: /* FAT16 (32+ MB) */ - case 0x0B: /* FAT32 */ - case 0x0C: /* FAT32 (LBA Mapped) */ - case 0x0E: /* FAT16 (LBA Mapped) */ - case 0x11: /* OS/2 FAT12 */ - case 0x14: /* OS/2 FAT16 (-32 MB) */ - case 0x16: /* OS/2 FAT16 (32+ MB) */ - case 0x1B: /* Hidden Win95 FAT32 */ - case 0x1C: /* Hidden Win95 FAT32 (LBA Mapped) */ - case 0x1D: /* Hidden Win95 FAT16 (LBA Mapped) */ - case 0xC1: /* DR-DOS FAT12 */ - case 0xC4: /* DR-DOS FAT16 (-32 MB) */ - case 0xC6: /* DR-DOS FAT16 (32+ MB) */ - case 0xD1: /* Old Multiuser DOS FAT12 */ - case 0xD4: /* Old Multiuser DOS FAT16 (-32 MB) */ - case 0xD6: /* Old Multiuser DOS FAT16 (32+ MB) */ - partitions[i].get_info = fat_get_info; - break; - - default: - partitions[i].get_info = unknown_partition_get_info; - break; - } - } - return IMGTOOLERR_SUCCESS; -} - - - -void pc_chd_get_info(const imgtool_class *imgclass, UINT32 state, union imgtoolinfo *info) -{ - switch(state) - { - /* --- the following bits of info are returned as 64-bit signed integers --- */ - case IMGTOOLINFO_INT_BLOCK_SIZE: info->i = FAT_SECLEN; break; - case IMGTOOLINFO_INT_IMAGE_EXTRA_BYTES: info->i = sizeof(pc_chd_image_info); break; - case IMGTOOLINFO_INT_TRACKS_ARE_CALLED_CYLINDERS: info->i = 1; break; - - /* --- the following bits of info are returned as NULL-terminated strings --- */ - case IMGTOOLINFO_STR_NAME: strcpy(info->s = imgtool_temp_str(), "pc_chd"); break; - case IMGTOOLINFO_STR_DESCRIPTION: strcpy(info->s = imgtool_temp_str(), "PC CHD disk image"); break; - case IMGTOOLINFO_STR_FILE_EXTENSIONS: strcpy(info->s = imgtool_temp_str(), "chd"); break; - case IMGTOOLINFO_STR_CREATEIMAGE_OPTSPEC: strcpy(info->s = imgtool_temp_str(), pc_chd_create_optionspec); break; - - /* --- the following bits of info are returned as pointers to data or functions --- */ - case IMGTOOLINFO_PTR_CREATE: info->create = pc_chd_image_create; break; - case IMGTOOLINFO_PTR_OPEN: info->open = pc_chd_image_open; break; - case IMGTOOLINFO_PTR_CLOSE: info->close = pc_chd_image_close; break; - case IMGTOOLINFO_PTR_READ_SECTOR: info->read_sector = pc_chd_image_readsector; break; - case IMGTOOLINFO_PTR_WRITE_SECTOR: info->write_sector = pc_chd_image_writesector; break; - case IMGTOOLINFO_PTR_READ_BLOCK: info->read_block = pc_chd_image_readblock; break; - case IMGTOOLINFO_PTR_WRITE_BLOCK: info->write_block = pc_chd_image_writeblock; break; - case IMGTOOLINFO_PTR_GET_SECTOR_SIZE: info->get_sector_size = pc_chd_image_getsectorsize; break; - case IMGTOOLINFO_PTR_CREATEIMAGE_OPTGUIDE: info->createimage_optguide = pc_chd_create_optionguide; break; - case IMGTOOLINFO_PTR_GET_GEOMETRY: info->get_geometry = pc_chd_image_get_geometry; break; - case IMGTOOLINFO_PTR_LIST_PARTITIONS: info->list_partitions = pc_chd_list_partitions; break; - } -} |