// license:BSD-3-Clause // copyright-holders:R. Belmont, Olivier Galibert /********************************************************************* formats/esq8_dsk.cpp Formats for 8-bit Ensoniq synthesizers and samplers Disk is PC MFM, 40 tracks, single (Mirage) or double (SQ-80) sided, with 6 sectors per track. Sectors 0-4 are 1024 bytes, sector 5 is 512 bytes *********************************************************************/ #include "esq8_dsk.h" #include "ioprocs.h" #include "osdcore.h" // osd_printf_* const floppy_image_format_t::desc_e esq8img_format::esq_6_desc[] = { { MFM, 0x4e, 80 }, { MFM, 0x00, 12 }, { RAW, 0x5224, 3 }, { MFM, 0xfc, 1 }, { MFM, 0x4e, 50 }, { MFM, 0x00, 12 }, { SECTOR_LOOP_START, 0, 5 }, { CRC_CCITT_START, 1 }, { RAW, 0x4489, 3 }, { MFM, 0xfe, 1 }, { TRACK_ID }, { HEAD_ID }, { SECTOR_ID }, { SIZE_ID }, { CRC_END, 1 }, { CRC, 1 }, { MFM, 0x4e, 22 }, { MFM, 0x00, 12 }, { CRC_CCITT_START, 2 }, { RAW, 0x4489, 3 }, { MFM, 0xfb, 1 }, { SECTOR_DATA, -1 }, { CRC_END, 2 }, { CRC, 2 }, { MFM, 0x4e, 84 }, { MFM, 0x00, 12 }, { SECTOR_LOOP_END }, { MFM, 0x4e, 170 }, { END } }; esq8img_format::esq8img_format() { } const char *esq8img_format::name() const noexcept { return "esq8"; } const char *esq8img_format::description() const noexcept { return "Ensoniq Mirage/SQ-80 floppy disk image"; } const char *esq8img_format::extensions() const noexcept { return "img"; } bool esq8img_format::supports_save() const noexcept { return true; } void esq8img_format::find_size(util::random_read &io, int &track_count, int &head_count, int §or_count) { uint64_t size; if(!io.length(size)) { track_count = 80; head_count = 1; sector_count = 6; if(size == 5632 * 80) { return; } } track_count = head_count = sector_count = 0; } int esq8img_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { int track_count, head_count, sector_count; find_size(io, track_count, head_count, sector_count); if(track_count) return FIFID_SIZE; return 0; } bool esq8img_format::load(util::random_read &io, uint32_t form_factor, const std::vector &variants, floppy_image &image) const { int track_count, head_count, sector_count; find_size(io, track_count, head_count, sector_count); uint8_t sectdata[(5*1024) + 512]; desc_s sectors[6]; for(int i=0; i &variants, const floppy_image &image) const { uint64_t file_offset = 0; int track_count, head_count, sector_count; get_geometry_mfm_pc(image, 2000, track_count, head_count, sector_count); if(track_count != 80) track_count = 80; // Happens for a fully unformatted floppy if(!head_count) head_count = 1; if(sector_count != 6) sector_count = 6; for(int track=0; track < track_count; track++) { for(int head=0; head < head_count; head++) { auto bitstream = generate_bitstream_from_track(track, head, 2000, image); auto sectors = extract_sectors_from_bitstream_mfm_pc(bitstream); int sector_expected_size; for(int sector = 0; sector < sector_count; sector++) { if(sector < 5) sector_expected_size = 1024; else sector_expected_size = 512; if(sectors[sector].size() != sector_expected_size) { osd_printf_error("esq8img_format: track %d, sector %d invalid size: %d\n", track, sector, sectors[sector].size()); return false; } /*auto const [err, actual] =*/ write_at(io, file_offset, sectors[sector].data(), sector_expected_size); // FIXME: check for errors file_offset += sector_expected_size; } } } return true; } const esq8img_format FLOPPY_ESQ8IMG_FORMAT;