// license:BSD-3-Clause // copyright-holders:Olivier Galibert, R. Belmont /********************************************************************* formats/concept_dsk.c Formats for Corvus Concept 5.25" DSDD is PC MFM, 77 tracks, double-sided, with 9 sectors per track *********************************************************************/ #include #include "flopimg.h" #include "formats/concept_dsk.h" /* 9 sectors / track, 512 bytes per sector */ const floppy_image_format_t::desc_e cc525dsdd_format::cc_9_desc[] = { { MFM, 0x4e, 80 }, { MFM, 0x00, 12 }, { RAW, 0x5224, 3 }, { MFM, 0xfc, 1 }, { MFM, 0x4e, 50 }, { MFM, 0x00, 12 }, { SECTOR_LOOP_START, 1, 9 }, { 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 } }; cc525dsdd_format::cc525dsdd_format() { } const char *cc525dsdd_format::name() const { return "img"; } const char *cc525dsdd_format::description() const { return "Corvus Concept 5.25\" DSDD floppy disk image"; } const char *cc525dsdd_format::extensions() const { return "img"; } bool cc525dsdd_format::supports_save() const { return true; } void cc525dsdd_format::find_size(io_generic *io, uint8_t &track_count, uint8_t &head_count, uint8_t §or_count) { uint64_t size = io_generic_size(io); track_count = 77; head_count = 2; sector_count = 9; uint32_t expected_size = 512 * track_count*head_count*sector_count; if (size == expected_size) { return; } track_count = head_count = sector_count = 0; } int cc525dsdd_format::identify(io_generic *io, uint32_t form_factor) { uint8_t track_count, head_count, sector_count; find_size(io, track_count, head_count, sector_count); if(track_count) return 50; return 0; } bool cc525dsdd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { uint8_t track_count, head_count, sector_count; find_size(io, track_count, head_count, sector_count); uint8_t sectdata[10*512]; desc_s sectors[10]; for(int i=0; iset_variant(floppy_image::DSDD); return true; } bool cc525dsdd_format::save(io_generic *io, floppy_image *image) { int track_count, head_count, sector_count; get_geometry_mfm_pc(image, 2000, track_count, head_count, sector_count); if(track_count != 77) track_count = 77; // Happens for a fully unformatted floppy if(!head_count) head_count = 2; if(sector_count != 9) sector_count = 9; uint8_t sectdata[9*512]; int track_size = sector_count*512; for(int track=0; track < track_count; track++) { for(int head=0; head < head_count; head++) { get_track_data_mfm_pc(track, head, image, 2000, 512, sector_count, sectdata); io_generic_write(io, sectdata, (track*head_count + head)*track_size, track_size); } } return true; } const floppy_format_type FLOPPY_CONCEPT_525DSDD_FORMAT = &floppy_image_format_creator;