// license:BSD-3-Clause // copyright-holders:Dirk Best, Nigel Barnes /*************************************************************************** Acorn - BBC Micro, Electron, Archimedes Disk image formats ***************************************************************************/ #include "acorn_dsk.h" #include "imageutl.h" #include "coretmpl.h" #include "ioprocs.h" #include "multibyte.h" #include #include acorn_ssd_format::acorn_ssd_format() : wd177x_format(formats) { } const char *acorn_ssd_format::name() const noexcept { return "ssd"; } const char *acorn_ssd_format::description() const noexcept { return "Acorn SSD disk image"; } const char *acorn_ssd_format::extensions() const noexcept { return "ssd,bbc,img"; } int acorn_ssd_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint8_t cat[8]; uint32_t sectors0, sectors2; uint64_t size; if (io.length(size)) return -1; for (int i = 0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; // test for Torch CPN - test pattern at sector &0018 read_at(io, 0x32800, cat, 8); // FIXME: check for errors and premature EOF if (memcmp(cat, "\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd", 8) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // test for HADFS - test pattern at sector 70 read_at(io, 0x04610, cat, 8); // FIXME: check for errors and premature EOF if (memcmp(cat, "\x00\x28\x43\x29\x4a\x47\x48\x00", 8) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // test for Kenda SD - offset &0962 = 0 SD/1 DD, offset &0963 = disk size blocks / 4 (block size = 1K, ie. 0x400 bytes), reserved tracks = 3, ie. 0x1e00 bytes, soft stagger = 2 sectors, ie. 0x200 bytes read_at(io, 0x0960, cat, 8); // FIXME: check for errors and premature EOF if (cat[2] == 0 && ((uint64_t)cat[3] * 4 * 0x400 + 0x2000) == size && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) { // valid blocks for single sided if (f.head_count == 1 && (cat[3] == 0x17 || cat[3] == 0x30)) return i; // valid blocks for double sided if (f.head_count == 2 && (cat[3] == 0x2f || cat[3] == 0x62)) return i; } // read sector count from side 0 catalogue read_at(io, 0x100, cat, 8); // FIXME: check for errors and premature EOF sectors0 = get_u16be(&cat[6]) & 0x3ff; LOG_FORMATS("ssd: sector count 0: %d %s\n", sectors0, sectors0 % 10 != 0 ? "invalid" : ""); if ((size <= (uint64_t)compute_track_size(f) * f.track_count * f.head_count) && (sectors0 <= f.track_count * f.sector_count)) { if (f.head_count == 2) { // read sector count from side 2 catalogue read_at(io, (uint64_t)compute_track_size(f) * f.track_count + 0x100, cat, 8); // sequential sectors2 = get_u16be(&cat[6]) & 0x3ff; // exception case for Acorn CP/M System Disc 1 read_at(io, 0x367ec, cat, 8); // FIXME: check for errors and premature EOF if (memcmp(cat, "/M ", 4) == 0) sectors2 = get_u16be(&cat[6]) & 0x3ff; LOG_FORMATS("ssd: sector count 2: %d %s\n", sectors2, sectors2 % 10 != 0 ? "invalid" : ""); } else { sectors2 = sectors0; } if (sectors0 > 0 && sectors2 > 0 && sectors0 % 10 == 0 && sectors2 % 10 == 0 && size <= (sectors0 + sectors2) * 256) return i; } } return -1; } int acorn_ssd_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_SIZE | FIFID_STRUCT; return 0; } int acorn_ssd_format::get_image_offset(const format &f, int head, int track) const { return (f.track_count * head + track) * compute_track_size(f); } const acorn_ssd_format::format acorn_ssd_format::formats[] = { { // 100k 40 track single sided single density floppy_image::FF_525, floppy_image::SSSD, floppy_image::FM, 4000, 10, 40, 1, 256, {}, 0, {}, 40, 10, 10 }, { // 200k 80 track single sided single density floppy_image::FF_525, floppy_image::SSQD, floppy_image::FM, 4000, 10, 80, 1, 256, {}, 0, {}, 40, 10, 10 }, { // 200k 40 track double sided single density floppy_image::FF_525, floppy_image::DSSD, floppy_image::FM, 4000, 10, 40, 2, 256, {}, 0, {}, 40, 10, 10 }, { // 400k 80 track double sided single density floppy_image::FF_525, floppy_image::DSQD, floppy_image::FM, 4000, 10, 80, 2, 256, {}, 0, {}, 40, 10, 10 }, { // 100k 40 track single sided single density floppy_image::FF_35, floppy_image::SSSD, floppy_image::FM, 4000, 10, 40, 1, 256, {}, 0, {}, 40, 10, 10 }, { // 200k 80 track single sided single density floppy_image::FF_35, floppy_image::SSDD, floppy_image::FM, 4000, 10, 80, 1, 256, {}, 0, {}, 40, 10, 10 }, { // 200k 40 track double sided single density floppy_image::FF_35, floppy_image::DSSD, floppy_image::FM, 4000, 10, 40, 2, 256, {}, 0, {}, 40, 10, 10 }, { // 400k 80 track double sided single density floppy_image::FF_35, floppy_image::DSDD, floppy_image::FM, 4000, 10, 80, 2, 256, {}, 0, {}, 40, 10, 10 }, { // 100k 40 track single sided single density floppy_image::FF_3, floppy_image::SSSD, floppy_image::FM, 4000, 10, 40, 1, 256, {}, 0, {}, 40, 10, 10 }, {} }; acorn_dsd_format::acorn_dsd_format() : wd177x_format(formats) { } const char *acorn_dsd_format::name() const noexcept { return "dsd"; } const char *acorn_dsd_format::description() const noexcept { return "Acorn DSD disk image"; } const char *acorn_dsd_format::extensions() const noexcept { return "dsd"; } int acorn_dsd_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint8_t cat[8]; uint32_t sectors0, sectors2; uint64_t size; if (io.length(size)) return -1; for (int i = 0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; // test for Torch CPN - test pattern at sector &0018 read_at(io, 0x1200, cat, 8); // FIXME: check for errors and premature EOF if (memcmp(cat, "\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd", 8) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // test for HADFS - test pattern at sector 70 read_at(io, 0x08c10, cat, 8); // FIXME: check for errors and premature EOF if (memcmp(cat, "\x00\x28\x43\x29\x4a\x47\x48\x00", 8) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // test for FLEX - from System Information Record read_at(io, 0x0226, cat, 2); // FIXME: check for errors and premature EOF if ((memcmp(cat, "\x4f\x14", 2) == 0 || memcmp(cat, "\x4f\x0a", 2) == 0) && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // read sector count from side 0 catalogue read_at(io, 0x100, cat, 8); // FIXME: check for errors and premature EOF sectors0 = get_u16be(&cat[6]) & 0x3ff; LOG_FORMATS("dsd: sector count 0: %d %s\n", sectors0, sectors0 % 10 != 0 ? "invalid" : ""); if ((size <= (uint64_t)compute_track_size(f) * f.track_count * f.head_count) && (sectors0 <= f.track_count * f.sector_count)) { // read sector count from side 2 catalogue read_at(io, 0xb00, cat, 8); // interleaved sectors2 = get_u16be(&cat[6]) & 0x3ff; // exception case for Acorn CP/M System Disc 1 read_at(io, 0x97ec, cat, 8); // FIXME: check for errors and premature EOF if (memcmp(cat, "/M ", 4) == 0) sectors2 = get_u16be(&cat[6]) & 0x3ff; LOG_FORMATS("dsd: sector count 2: %d %s\n", sectors2, sectors2 % 10 != 0 ? "invalid" : ""); if (sectors0 > 0 && sectors2 > 0 && size <= (sectors0 + sectors2) * 256) return i; } } return -1; } int acorn_dsd_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_STRUCT | FIFID_SIZE; return 0; } int acorn_dsd_format::get_image_offset(const format &f, int head, int track) const { return (track * f.head_count + head) * compute_track_size(f); } const acorn_dsd_format::format acorn_dsd_format::formats[] = { { // 400k 80 track double sided single density (interleaved) floppy_image::FF_525, floppy_image::DSQD, floppy_image::FM, 4000, 10, 80, 2, 256, {}, -1, { 0,1,2,3,4,5,6,7,8,9 }, 40, 10, 10 }, { // 200k 40 track double sided single density (interleaved) floppy_image::FF_525, floppy_image::DSSD, floppy_image::FM, 4000, 10, 40, 2, 256, {}, -1, { 0,1,2,3,4,5,6,7,8,9 }, 40, 10, 10 }, { // 400k 80 track double sided single density (interleaved) floppy_image::FF_35, floppy_image::DSDD, floppy_image::FM, 4000, 10, 80, 2, 256, {}, -1, { 0,1,2,3,4,5,6,7,8,9 }, 40, 10, 10 }, { // 200k 40 track double sided single density (interleaved) floppy_image::FF_35, floppy_image::DSSD, floppy_image::FM, 4000, 10, 40, 2, 256, {}, -1, { 0,1,2,3,4,5,6,7,8,9 }, 40, 10, 10 }, {} }; opus_ddos_format::opus_ddos_format() : wd177x_format(formats) { } const char *opus_ddos_format::name() const noexcept { return "ddos"; } const char *opus_ddos_format::description() const noexcept { return "Opus DDOS disk image"; } const char *opus_ddos_format::extensions() const noexcept { return "dds"; } int opus_ddos_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint8_t cat[8]; uint32_t sectors0, sectors2; // read sector count from side 0 catalogue read_at(io, 0x1000, cat, 8); // FIXME: check for errors and premature EOF sectors0 = get_u16be(&cat[1]); LOG_FORMATS("ddos: sector count 0: %d %s\n", sectors0, sectors0 % 18 != 0 ? "invalid" : ""); uint64_t size; if (io.length(size)) return -1; for (int i = 0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; if ((size <= (uint64_t)compute_track_size(f) * f.track_count * f.head_count) && (sectors0 <= f.track_count * f.sector_count)) { if (f.head_count == 2) { // read sector count from side 2 catalogue read_at(io, (uint64_t)compute_track_size(f) * f.track_count + 0x1000, cat, 8); // sequential sectors2 = get_u16be(&cat[1]); LOG_FORMATS("ddos: sector count 2: %d %s\n", sectors2, sectors2 % 18 != 0 ? "invalid" : ""); } else { sectors2 = sectors0; } if (sectors0 % 18 == 0 && sectors2 % 18 == 0) return i; } } return -1; } int opus_ddos_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_STRUCT | FIFID_SIZE; return 0; } int opus_ddos_format::get_image_offset(const format &f, int head, int track) const { return (f.track_count * head + track) * compute_track_size(f); } const opus_ddos_format::format opus_ddos_format::formats[] = { { // 180k 40 track single sided double density - gaps unverified floppy_image::FF_525, floppy_image::SSSD, floppy_image::MFM, 2000, 18, 40, 1, 256, {}, 0, {}, 36, 22, 27 }, { // 360k 80 track single sided double density - gaps unverified floppy_image::FF_525, floppy_image::SSDD, floppy_image::MFM, 2000, 18, 80, 1, 256, {}, 0, {}, 36, 22, 27 }, { // 360k 40 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSSD, floppy_image::MFM, 2000, 18, 40, 2, 256, {}, 0, {}, 36, 22, 27 }, { // 720k 80 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM, 2000, 18, 80, 2, 256, {}, 0, {}, 36, 22, 27 }, {} }; acorn_adfs_old_format::acorn_adfs_old_format() : wd177x_format(formats) { } const char *acorn_adfs_old_format::name() const noexcept { return "adfs_o"; } const char *acorn_adfs_old_format::description() const noexcept { return "Acorn ADFS (OldMap) disk image"; } const char *acorn_adfs_old_format::extensions() const noexcept { return "adf,ads,adm,adl"; } int acorn_adfs_old_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { std::error_condition err; size_t actual; uint8_t map[3]; uint32_t sectors; uint8_t oldmap[4]; // read sector count from free space map std::tie(err, actual) = read_at(io, 0xfc, map, 3); if (err || (3 != actual)) return -1; sectors = get_u24le(map); LOG_FORMATS("adfs_o: sector count %d %s\n", sectors, sectors % 16 != 0 ? "invalid" : ""); // read map identifier std::tie(err, actual) = read_at(io, 0x201, oldmap, 4); if (err || (4 != actual)) return -1; LOG_FORMATS("adfs_o: map identifier %s %s\n", oldmap, memcmp(oldmap, "Hugo", 4) != 0 ? "invalid" : ""); uint64_t size; if (io.length(size)) return -1; for (int i = 0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; // valid images will have map identifier 'Hugo' and sector counts adfs-s = 0x280; adfs-m = 0x500; adfs-l = 0xa00; adfs-dos = 0xaa0; though many adfs-s images are incorrect if ((size <= (uint64_t)compute_track_size(f) * f.track_count * f.head_count) && memcmp(oldmap, "Hugo", 4) == 0 && (sectors == 0x280 || sectors == 0x500 || sectors == 0xa00 || sectors == 0xaa0 || size == 819200)) { return i; } } return -1; } int acorn_adfs_old_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_STRUCT | FIFID_SIZE; return 0; } int acorn_adfs_old_format::get_image_offset(const format &f, int head, int track) const { return (track * f.head_count + head) * compute_track_size(f); } const acorn_adfs_old_format::format acorn_adfs_old_format::formats[] = { { // M - 320K 5 1/4 inch 80 track single sided double density floppy_image::FF_525, floppy_image::SSDD, floppy_image::MFM, 2000, 16, 80, 1, 256, {}, 0, {}, 60, 22, 43 }, { // S - 160K 5 1/4 inch 40 track single sided double density floppy_image::FF_525, floppy_image::SSDD, floppy_image::MFM, 2000, 16, 40, 1, 256, {}, 0, {}, 60, 22, 43 }, { // L - 640K 5 1/4 inch 80 track double sided double density (interleaved) floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM, 2000, 16, 80, 2, 256, {}, -1, { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 }, 42, 22, 57 }, { // M - 320K 3 1/2 inch 80 track single sided double density floppy_image::FF_35, floppy_image::SSDD, floppy_image::MFM, 2000, 16, 80, 1, 256, {}, 0, {}, 60, 22, 43 }, { // S - 160K 3 1/2 inch 40 track single sided double density floppy_image::FF_35, floppy_image::SSDD, floppy_image::MFM, 2000, 16, 40, 1, 256, {}, 0, {}, 60, 22, 43 }, { // L - 640K 3 1/2 inch 80 track double sided double density (interleaved) floppy_image::FF_35, floppy_image::DSDD, floppy_image::MFM, 2000, 16, 80, 2, 256, {}, -1, { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 }, 42, 22, 57 }, {} }; acorn_adfs_new_format::acorn_adfs_new_format() : wd177x_format(formats) { } const char *acorn_adfs_new_format::name() const noexcept { return "adfs_n"; } const char *acorn_adfs_new_format::description() const noexcept { return "Acorn ADFS (NewMap) disk image"; } const char *acorn_adfs_new_format::extensions() const noexcept { return "adf"; } int acorn_adfs_new_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { std::error_condition err; size_t actual; uint8_t dform[4]; uint8_t eform[4]; // read map identifiers for D and E formats std::tie(err, actual) = read_at(io, 0x401, dform, 4); if (err || (4 != actual)) return -1; LOG_FORMATS("adfs_n: map identifier (D format) %s %s\n", dform, (memcmp(dform, "Hugo", 4) != 0 && memcmp(dform, "Nick", 4) != 0) ? "invalid" : ""); std::tie(err, actual) = read_at(io, 0x801, eform, 4); if (err || (4 != actual)) return -1; LOG_FORMATS("adfs_n: map identifier (E format) %s %s\n", eform, memcmp(eform, "Nick", 4) != 0 ? "invalid" : ""); uint64_t size; if (io.length(size)) return -1; for (int i = 0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; // no further checks for 1600K images if ((size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) && size == 0x190000) return i; // valid 800K images will have map identifier Nick, Arthur D format still use Hugo if ((size <= (uint64_t)compute_track_size(f) * f.track_count * f.head_count) && (memcmp(dform, "Hugo", 4) == 0 || memcmp(dform, "Nick", 4) == 0 || memcmp(eform, "Nick", 4) == 0)) return i; } return -1; } int acorn_adfs_new_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_STRUCT | FIFID_SIZE; return 0; } int acorn_adfs_new_format::get_image_offset(const format &f, int head, int track) const { return (track * f.head_count + head) * compute_track_size(f); } const acorn_adfs_new_format::format acorn_adfs_new_format::formats[] = { { // D,E - 800K 3 1/2 inch 80 track double sided double density - gaps unverified floppy_image::FF_35, floppy_image::DSDD, floppy_image::MFM, 2000, 5, 80, 2, 1024, {}, -1, { 0,1,2,3,4 }, 32, 22, 90 }, { // F - 1600K 3 1/2 inch 80 track double sided high density floppy_image::FF_35, floppy_image::DSHD, floppy_image::MFM, 1000, 10, 80, 2, 1024, {}, -1, { 0,1,2,3,4,5,6,7,8,9 }, 50, 22, 90 }, {} }; acorn_dos_format::acorn_dos_format() : wd177x_format(formats) { } const char *acorn_dos_format::name() const noexcept { return "dos"; } const char *acorn_dos_format::description() const noexcept { return "Acorn DOS disk image"; } const char *acorn_dos_format::extensions() const noexcept { return "img"; } int acorn_dos_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint64_t size; if (io.length(size)) return -1; for (int i=0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; if (size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) { // read media type ID from FAT - Acorn DOS = 0xfd uint8_t type; auto const [err, actual] = read_at(io, 0, &type, 1); if (!err && (1 == actual)) { LOG_FORMATS("dos: 800k media type id %02X %s\n", type, type != 0xfd ? "invalid" : ""); if (type == 0xfd) return i; } } } return -1; } int acorn_dos_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_STRUCT | FIFID_SIZE; return 0; } int acorn_dos_format::get_image_offset(const format &f, int head, int track) const { return (track * f.head_count + head) * compute_track_size(f); } const acorn_dos_format::format acorn_dos_format::formats[] = { { // 800K 5 1/4 inch 80 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSQD, floppy_image::MFM, 2000, 5, 80, 2, 1024, {}, -1, { 1,2,3,4,5 }, 32, 22, 90 }, {} }; opus_ddcpm_format::opus_ddcpm_format() { } const char *opus_ddcpm_format::name() const noexcept { return "ddcpm"; } const char *opus_ddcpm_format::description() const noexcept { return "Opus DD CP/M disk image"; } const char *opus_ddcpm_format::extensions() const noexcept { return "ssd"; } bool opus_ddcpm_format::supports_save() const noexcept { return false; } int opus_ddcpm_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint8_t h[8]; auto const [err, actual] = read_at(io, 0, h, 8); if (err || (8 != actual)) return 0; uint64_t size; if (io.length(size)) return 0; if (size == 819200 && memcmp(h, "Slogger ", 8) == 0) return FIFID_SIGN | FIFID_SIZE; return 0; } bool opus_ddcpm_format::load(util::random_read &io, uint32_t form_factor, const std::vector &variants, floppy_image &image) const { // Double density discs formatted with DDCPM : // // Tracks 0 - 2 formatted Single Density // Tracks 3 - 159 formatted Double Density // // Single density tracks are 10 x 256 byte sectors per track // Sector skew of 2 // // Double Density tracks are 10 x 512 byte sectors per track // Sector skew of 1 // Sector interleave of 2 // for (int head = 0; head < 2; head++) { for (int track = 0; track < 80; track++) { bool const mfm = track > 2 || head; int const bps = mfm ? 512 : 256; int const spt = 10; desc_pc_sector sects[10]; uint8_t sectdata[10*512]; /*auto const [err, actual] =*/ read_at(io, head * 80 * spt * 512 + track * spt * 512, sectdata, spt * 512); // FIXME: check for errors and premature EOF for (int i = 0; i < spt; i++) { sects[i].track = track; sects[i].head = head; sects[i].sector = i; sects[i].size = mfm ? 2 : 1; sects[i].actual_size = bps; sects[i].data = sectdata + i * 512; sects[i].deleted = false; sects[i].bad_crc = false; } if (mfm) build_wd_track_mfm(track, head, image, 100000, 10, sects, 60, 43, 22); else build_wd_track_fm(track, head, image, 50000, 10, sects, 40, 10, 10); } } return true; } bool opus_ddcpm_format::save(util::random_read_write &io, const std::vector &variants, const floppy_image &image) const { return false; } cumana_dfs_format::cumana_dfs_format() : wd177x_format(formats) { } const char *cumana_dfs_format::name() const noexcept { return "cdfs"; } const char *cumana_dfs_format::description() const noexcept { return "Cumana DFS disk image"; } const char *cumana_dfs_format::extensions() const noexcept { return "img"; } int cumana_dfs_format::find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint64_t size; if (io.length(size)) return -1; for (int i = 0; formats[i].form_factor; i++) { const format &f = formats[i]; if (form_factor != floppy_image::FF_UNKNOWN && form_factor != f.form_factor) continue; if (size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) { uint8_t info; auto const [err, actual] = read_at(io, 14, &info, 1); if (err || (actual != 1)) return -1; if (f.head_count == (util::BIT(info, 6) ? 2 : 1) && f.track_count == (util::BIT(info, 7) ? 80 : 40)) return i; } } return -1; } int cumana_dfs_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int type = find_size(io, form_factor, variants); if (type != -1) return FIFID_STRUCT | FIFID_SIZE; return 0; } int cumana_dfs_format::get_image_offset(const format &f, int head, int track) const { return (track * f.head_count + head) * compute_track_size(f); } const cumana_dfs_format::format cumana_dfs_format::formats[] = { { // 180K 5 1/4 inch 40 track single sided double density - gaps unverified floppy_image::FF_525, floppy_image::SSDD, floppy_image::MFM, 2000, 9, 40, 1, 512, {}, -1, { 0,3,6,1,4,7,2,5,8 }, 32, 22, 90 }, { // 360K 5 1/4 inch 40 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM, 2000, 9, 40, 2, 512, {}, -1, { 0,3,6,1,4,7,2,5,8 }, 32, 22, 90 }, { // 360K 5 1/4 inch 80 track single sided double density - gaps unverified floppy_image::FF_525, floppy_image::SSQD, floppy_image::MFM, 2000, 9, 80, 1, 512, {}, -1, { 0,3,6,1,4,7,2,5,8 }, 32, 22, 90 }, { // 720K 5 1/4 inch 80 track single double double density - gaps unverified floppy_image::FF_525, floppy_image::DSQD, floppy_image::MFM, 2000, 9, 80, 2, 512, {}, -1, { 0,3,6,1,4,7,2,5,8 }, 32, 22, 90 }, {} }; const acorn_ssd_format FLOPPY_ACORN_SSD_FORMAT; const acorn_dsd_format FLOPPY_ACORN_DSD_FORMAT; const acorn_dos_format FLOPPY_ACORN_DOS_FORMAT; const acorn_adfs_old_format FLOPPY_ACORN_ADFS_OLD_FORMAT; const acorn_adfs_new_format FLOPPY_ACORN_ADFS_NEW_FORMAT; const opus_ddos_format FLOPPY_OPUS_DDOS_FORMAT; const opus_ddcpm_format FLOPPY_OPUS_DDCPM_FORMAT; const cumana_dfs_format FLOPPY_CUMANA_DFS_FORMAT;