// license:BSD-3-Clause // copyright-holders:Dirk Best, Nigel Barnes /*************************************************************************** Acorn - BBC Micro, Electron, Archimedes Disk image formats ***************************************************************************/ #include "acorn_dsk.h" acorn_ssd_format::acorn_ssd_format() : wd177x_format(formats) { } const char *acorn_ssd_format::name() const { return "ssd"; } const char *acorn_ssd_format::description() const { return "Acorn SSD disk image"; } const char *acorn_ssd_format::extensions() const { return "ssd,bbc,img"; } int acorn_ssd_format::find_size(io_generic *io, uint32_t form_factor) { uint8_t cat[8]; uint32_t sectors0, sectors2; uint64_t size = io_generic_size(io); 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 io_generic_read(io, cat, 0x32800, 8); if (memcmp(cat, "\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd", 4) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // test for HADFS - test pattern at sector 70 io_generic_read(io, cat, 0x04610, 8); if (memcmp(cat, "\x00\x28\x43\x29\x4a\x47\x48\x00", 4) == 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 io_generic_read(io, cat, 0x0960, 8); 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 io_generic_read(io, cat, 0x100, 8); sectors0 = ((cat[6] & 3) << 8) + cat[7]; 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 io_generic_read(io, cat, (uint64_t)compute_track_size(f) * f.track_count + 0x100, 8); // sequential sectors2 = ((cat[6] & 3) << 8) + cat[7]; // exception case for Acorn CP/M System Disc 1 io_generic_read(io, cat, 0x367ec, 8); if (memcmp(cat, "/M ", 4) == 0) sectors2 = ((cat[6] & 3) << 8) + cat[7]; LOG_FORMATS("ssd: sector count 2: %d %s\n", sectors2, sectors2 % 10 != 0 ? "invalid" : ""); } else { sectors2 = sectors0; } if (sectors0 > 0 && sectors0 % 10 == 0 && sectors2 > 0 && sectors2 % 10 == 0 && size <= (sectors0 + sectors2) * 256) return i; } } LOG_FORMATS("ssd: no match\n"); return -1; } int acorn_ssd_format::identify(io_generic *io, uint32_t form_factor) { int type = find_size(io, form_factor); if(type != -1) return 90; return 0; } int acorn_ssd_format::get_image_offset(const format &f, int head, int track) { if (f.sector_base_id == -1) return (track * f.head_count + head) * compute_track_size(f); else 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 { return "dsd"; } const char *acorn_dsd_format::description() const { return "Acorn DSD disk image"; } const char *acorn_dsd_format::extensions() const { return "dsd"; } int acorn_dsd_format::find_size(io_generic *io, uint32_t form_factor) { uint8_t cat[8]; uint32_t sectors0, sectors2; uint64_t size = io_generic_size(io); 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 io_generic_read(io, cat, 0x1200, 8); if (memcmp(cat, "\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd", 4) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // test for HADFS - test pattern at sector 70 io_generic_read(io, cat, 0x08c10, 8); if (memcmp(cat, "\x00\x28\x43\x29\x4a\x47\x48\x00", 4) == 0 && size == (uint64_t)compute_track_size(f) * f.track_count * f.head_count) return i; // read sector count from side 0 catalogue io_generic_read(io, cat, 0x100, 8); sectors0 = ((cat[6] & 3) << 8) + cat[7]; 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 io_generic_read(io, cat, 0xb00, 8); // interleaved sectors2 = ((cat[6] & 3) << 8) + cat[7]; // exception case for Acorn CP/M System Disc 1 io_generic_read(io, cat, 0x97ec, 8); if (memcmp(cat, "/M ", 4) == 0) sectors2 = ((cat[6] & 3) << 8) + cat[7]; LOG_FORMATS("dsd: sector count 2: %d %s\n", sectors2, sectors2 % 10 != 0 ? "invalid" : ""); if (sectors0 > 0 && sectors0 % 10 == 0 && sectors2 > 0 && sectors2 % 10 == 0 && size <= (sectors0 + sectors2) * 256) return i; } } LOG_FORMATS("dsd: no match\n"); return -1; } int acorn_dsd_format::identify(io_generic *io, uint32_t form_factor) { int type = find_size(io, form_factor); if (type != -1) return 90; return 0; } int acorn_dsd_format::get_image_offset(const format &f, int head, int track) { if (f.sector_base_id == -1) return (track * f.head_count + head) * compute_track_size(f); else return (f.track_count * head + track) * 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 { return "ddos"; } const char *opus_ddos_format::description() const { return "Opus DDOS disk image"; } const char *opus_ddos_format::extensions() const { return "dds"; } int opus_ddos_format::find_size(io_generic *io, uint32_t form_factor) { uint8_t cat[8]; uint32_t sectors0, sectors2; // read sector count from side 0 catalogue io_generic_read(io, cat, 0x1000, 8); sectors0 = (cat[1] << 8) + cat[2]; LOG_FORMATS("ddos: sector count 0: %d %s\n", sectors0, sectors0 % 18 != 0 ? "invalid" : ""); uint64_t size = io_generic_size(io); 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 io_generic_read(io, cat, (uint64_t)compute_track_size(f) * f.track_count + 0x1000, 8); // sequential sectors2 = (cat[1] << 8) + cat[2]; 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; } } LOG_FORMATS("ddos: no match\n"); return -1; } int opus_ddos_format::identify(io_generic *io, uint32_t form_factor) { int type = find_size(io, form_factor); if (type != -1) return 90; return 0; } int opus_ddos_format::get_image_offset(const format &f, int head, int track) { if (f.sector_base_id == -1) return (track * f.head_count + head) * compute_track_size(f); else 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, 4000, 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, 4000, 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, 4000, 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, 4000, 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 { return "adfs_o"; } const char *acorn_adfs_old_format::description() const { return "Acorn ADFS (OldMap) disk image"; } const char *acorn_adfs_old_format::extensions() const { return "adf,ads,adm,adl"; } int acorn_adfs_old_format::find_size(io_generic *io, uint32_t form_factor) { uint8_t map[3]; uint32_t sectors; uint8_t oldmap[4]; // read sector count from free space map io_generic_read(io, map, 0xfc, 3); sectors = map[0] + (map[1] << 8) + (map[2] << 16); LOG_FORMATS("adfs_o: sector count %d %s\n", sectors, sectors % 16 != 0 ? "invalid" : ""); // read map identifier io_generic_read(io, oldmap, 0x201, 4); LOG_FORMATS("adfs_o: map identifier %s %s\n", oldmap, memcmp(oldmap, "Hugo", 4) != 0 ? "invalid" : ""); uint64_t size = io_generic_size(io); 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; } } LOG_FORMATS("adfs_o: no match\n"); return -1; } int acorn_adfs_old_format::identify(io_generic *io, uint32_t form_factor) { int type = find_size(io, form_factor); if(type != -1) return 100; return 0; } int acorn_adfs_old_format::get_image_offset(const format &f, int head, int track) { if (f.sector_base_id == -1) return (track * f.head_count + head) * compute_track_size(f); else return (f.track_count * head + track) * 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 { return "adfs_n"; } const char *acorn_adfs_new_format::description() const { return "Acorn ADFS (NewMap) disk image"; } const char *acorn_adfs_new_format::extensions() const { return "adf"; } int acorn_adfs_new_format::find_size(io_generic *io, uint32_t form_factor) { uint8_t dform[4]; uint8_t eform[4]; // read map identifiers for D and E formats io_generic_read(io, dform, 0x401, 4); LOG_FORMATS("adfs_n: map identifier (D format) %s %s\n", dform, (memcmp(dform, "Hugo", 4) != 0 && memcmp(dform, "Nick", 4) != 0) ? "invalid" : ""); io_generic_read(io, eform, 0x801, 4); LOG_FORMATS("adfs_n: map identifier (E format) %s %s\n", eform, memcmp(eform, "Nick", 4) != 0 ? "invalid" : ""); uint64_t size = io_generic_size(io); 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; } } LOG_FORMATS("adfs_n: no match\n"); return -1; } int acorn_adfs_new_format::identify(io_generic *io, uint32_t form_factor) { int type = find_size(io, form_factor); if (type != -1) return 100; return 0; } int acorn_adfs_new_format::get_image_offset(const format &f, int head, int track) { if (f.sector_base_id == -1) return (track * f.head_count + head) * compute_track_size(f); else return (f.track_count * head + track) * 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 quad density floppy_image::FF_35, floppy_image::DSHD, floppy_image::MFM, 2000, 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 { return "dos"; } const char *acorn_dos_format::description() const { return "Acorn DOS disk image"; } const char *acorn_dos_format::extensions() const { return "img"; } int acorn_dos_format::find_size(io_generic *io, uint32_t form_factor) { uint8_t type; uint64_t size = io_generic_size(io); 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 io_generic_read(io, &type, 0, 1); LOG_FORMATS("dos: 800k media type id %02X %s\n", type, type != 0xfd ? "invalid" : ""); if (type == 0xfd) return i; } } LOG_FORMATS("dos: no match\n"); return -1; } int acorn_dos_format::identify(io_generic *io, uint32_t form_factor) { int type = find_size(io, form_factor); if(type != -1) return 90; return 0; } int acorn_dos_format::get_image_offset(const format &f, int head, int track) { if (f.sector_base_id == -1) return (track * f.head_count + head) * compute_track_size(f); else return (f.track_count * head + track) * 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 { return "ddcpm"; } const char *opus_ddcpm_format::description() const { return "Opus DD CP/M disk image"; } const char *opus_ddcpm_format::extensions() const { return "ssd"; } bool opus_ddcpm_format::supports_save() const { return false; } int opus_ddcpm_format::identify(io_generic *io, uint32_t form_factor) { uint8_t h[8]; io_generic_read(io, h, 0, 8); if (io_generic_size(io) == 819200 && memcmp(h, "Slogger ", 8) == 0) return 100; LOG_FORMATS("ddcpm: no match\n"); return 0; } bool opus_ddcpm_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { // 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 // int spt, bps; for (int head = 0; head < 2; head++) { for (int track = 0; track < 80; track++) { bool mfm = track > 2 || head; bps = mfm ? 512 : 256; spt = 10; desc_pc_sector sects[10]; uint8_t sectdata[10*512]; io_generic_read(io, sectdata, head * 80 * spt * 512 + track * spt * 512, spt * 512); 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(io_generic *io, floppy_image *image) { return false; } const floppy_format_type FLOPPY_ACORN_SSD_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_ACORN_DSD_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_ACORN_DOS_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_ACORN_ADFS_OLD_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_ACORN_ADFS_NEW_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_OPUS_DDOS_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_OPUS_DDCPM_FORMAT = &floppy_image_format_creator;