// license:GPL-2.0+ // 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 form_factor) { UINT8 cat[8]; UINT32 sectors0, sectors2; // 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" : ""); UINT64 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)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, compute_track_size(f) * f.track_count + 0x100, 8); // sequential 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 % 10 == 0 && sectors2 % 10 == 0) return i; } } LOG_FORMATS("ssd: no match\n"); return -1; } int acorn_ssd_format::identify(io_generic *io, UINT32 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 }, {} }; 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 form_factor) { UINT8 cat[8]; UINT32 sectors0, sectors2; // 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" : ""); UINT64 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)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]; LOG_FORMATS("dsd: sector count 2: %d %s\n", sectors2, sectors2 % 10 != 0 ? "invalid" : ""); if (sectors0 % 10 == 0 && sectors2 % 10 == 0) return i; } } LOG_FORMATS("dsd: no match\n"); return -1; } int acorn_dsd_format::identify(io_generic *io, UINT32 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 }, {} }; 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 form_factor) { UINT8 cat[8]; UINT32 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 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)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, 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 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, {}, 40, 10, 10 }, { // 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, {}, 40, 10, 10 }, { // 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, {}, 40, 10, 10 }, { // 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, {}, 40, 10, 10 }, {} }; 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 form_factor) { UINT8 map[3]; UINT32 sectors; UINT8 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 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; though many adfs-s images are incorrect if ((size <= (UINT64)compute_track_size(f) * f.track_count * f.head_count) && memcmp(oldmap, "Hugo", 4) == 0 && (sectors == 0x280 || sectors == 0x500 || sectors == 0xa00 || size == 819200)) { return i; } } LOG_FORMATS("adfs_o: no match\n"); return -1; } int acorn_adfs_old_format::identify(io_generic *io, UINT32 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 }, 60, 22, 43 }, { // M - 320K 3 1/2 inch 80 track single sided double density floppy_image::FF_35, floppy_image::SSQD, 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::DSQD, 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 }, 60, 22, 43 }, {} }; 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 form_factor) { UINT8 dform[4]; UINT8 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, "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 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 Nick if ((size == (UINT64)compute_track_size(f) * f.track_count * f.head_count) && (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 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 }, 60, 22, 43 }, { // F - 1600K 3 1/2 inch 80 track double sided quad density - gaps unverified floppy_image::FF_35, floppy_image::DSQD, floppy_image::MFM, 2000, 10, 80, 2, 1024, {}, -1, { 0,1,2,3,4,5,6,7,8,9 }, 60, 22, 43 }, {} }; 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,adl"; } int acorn_dos_format::find_size(io_generic *io, UINT32 form_factor) { UINT8 cat[3]; UINT32 sectors; UINT64 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)compute_track_size(f) * f.track_count * f.head_count) { switch (size) { case 640 * 1024: // 640K Acorn (Bootable) DOS Format // read sector count from free space map - Acorn DOS = 0xaa0 io_generic_read(io, cat, 0xfc, 3); sectors = cat[0] + (cat[1] << 8) + (cat[2] << 16); if (sectors == 0xaa0) { // read media type ID from FAT - Acorn DOS = 0xff if (f.sector_base_id == -1) io_generic_read(io, cat, 0x2000, 1); // interleaved else io_generic_read(io, cat, 0x1000, 1); // sequential LOG_FORMATS("dos: 640k media type id %02X %s\n", cat[0], cat[0] != 0xff ? "invalid" : ""); if (cat[0] == 0xff) return i; } break; case 800 * 1024: // 800K Acorn DOS Format // read media type ID from FAT - Acorn DOS = 0xfd io_generic_read(io, cat, 0, 1); LOG_FORMATS("dos: 800k media type id %02X %s\n", cat[0], cat[0] != 0xfd ? "invalid" : ""); if (cat[0] == 0xfd) return i; break; } } } LOG_FORMATS("dos: no match\n"); return -1; } int acorn_dos_format::identify(io_generic *io, UINT32 form_factor) { int type = find_size(io, form_factor); if(type != -1) return 100; 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[] = { { // 640K 5 1/4 inch 80 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM, 2000, 16, 80, 2, 256, {}, 0, {}, 60, 22, 43 }, { // 640K 5 1/4 inch 80 track double sided double density (interleaved) - gaps unverified 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 }, 60, 22, 43 }, { // 800K 5 1/4 inch 80 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM, 2000, 5, 80, 2, 1024, {}, 0, {}, 60, 22, 43 }, {} }; acorn_cpm_format::acorn_cpm_format() : wd177x_format(formats) { } const char *acorn_cpm_format::name() const { return "cpm"; } const char *acorn_cpm_format::description() const { return "Acorn CP/M disk image"; } const char *acorn_cpm_format::extensions() const { return "img,ssd,dsd"; } int acorn_cpm_format::identify(io_generic *io, UINT32 form_factor) { UINT8 h[8]; io_generic_read(io, h, 0, 8); int type = find_size(io, form_factor); if(type != -1 && (memcmp(h, "Acorn CP", 8) == 0 || memcmp(h, "Slogger ", 8) == 0)) { return 100; } LOG_FORMATS("cpm: no match\n"); return 0; } int acorn_cpm_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_cpm_format::format acorn_cpm_format::formats[] = { { // 400K 5 1/4 inch 80 track double sided single density - gaps unverified floppy_image::FF_525, floppy_image::DSQD, floppy_image::FM, 4000, 5, 80, 2, 512, {}, 0, {}, 40, 10, 10 }, { // 400k 5 1/4 inch 80 track double sided single density (interleaved) - gaps unverified floppy_image::FF_525, floppy_image::DSQD, floppy_image::FM, 4000, 5, 80, 2, 512, {}, -1, { 0,1,2,3,4 }, 40, 10, 10 }, { // 800K 5 1/4 inch 80 track double sided double density - gaps unverified floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM, 2000, 10, 80, 2, 512, {}, 0, {}, 60, 22, 43 }, {} }; torch_cpn_format::torch_cpn_format() : wd177x_format(formats) { } const char *torch_cpn_format::name() const { return "cpn"; } const char *torch_cpn_format::description() const { return "Torch CPN disk image"; } const char *torch_cpn_format::extensions() const { return "dsd"; } int torch_cpn_format::identify(io_generic *io, UINT32 form_factor) { int type = find_size(io, form_factor); if(type != -1) return 50; LOG_FORMATS("cpn: no match\n"); return 0; } int torch_cpn_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 torch_cpn_format::format torch_cpn_format::formats[] = { { // 400k 80 track double sided single density (interleaved) - gaps unverified 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 }, {} }; 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_OPUS_DDOS_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_ACORN_DOS_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_ACORN_CPM_FORMAT = &floppy_image_format_creator; const floppy_format_type FLOPPY_TORCH_CPN_FORMAT = &floppy_image_format_creator;