1 // license:BSD-3-Clause 2 // copyright-holders:Olivier Galibert 3 /********************************************************************* 4 5 formats/upd765_dsk.h 6 7 helper for simple upd765-formatted disk images 8 9 *********************************************************************/ 10 #ifndef MAME_FORMATS_UPD765_DSK_H 11 #define MAME_FORMATS_UPD765_DSK_H 12 13 #pragma once 14 15 #include "flopimg.h" 16 17 class upd765_format : public floppy_image_format_t 18 { 19 public: 20 struct format { 21 uint32_t form_factor = 0U; // See floppy_image for possible values 22 uint32_t variant = 0U; // See floppy_image for possible values 23 uint32_t encoding = 0U; // See floppy_image for possible values 24 25 int cell_size; // See floppy_image_format_t for details 26 int sector_count; 27 int track_count; 28 int head_count; 29 int sector_base_size; 30 int per_sector_size[40]; // if sector_base_size is 0 31 int sector_base_id; // 0 or 1 usually, -1 if there's interleave 32 int per_sector_id[40]; // if sector_base_id is -1. If both per are used, then sector per_sector_id[i] has size per_sector_size[i] 33 int gap_4a; // Usually 80 - number of 4e between index and IAM sync 34 int gap_1; // Usually 50 - number of 4e between IAM and first IDAM sync 35 int gap_2; // 22 for <=1.44Mb, 41 for 2.88Mb - number of 4e between sector header and data sync 36 int gap_3; // Usually 84 - number of 4e between sector crc and next IDAM 37 }; 38 39 // End the array with {} 40 upd765_format(const format *formats); 41 42 virtual int identify(io_generic *io, uint32_t form_factor) override; 43 virtual bool load(io_generic *io, uint32_t form_factor, floppy_image *image) override; 44 virtual bool save(io_generic *io, floppy_image *image) override; 45 virtual bool supports_save() const override; 46 47 protected: 48 uint64_t file_header_skip_bytes; 49 uint64_t file_footer_skip_bytes; 50 51 floppy_image_format_t::desc_e* get_desc_fm(const format &f, int ¤t_size, int &end_gap_index); 52 floppy_image_format_t::desc_e* get_desc_mfm(const format &f, int ¤t_size, int &end_gap_index); 53 int find_size(io_generic *io, uint32_t form_factor) const; 54 int compute_track_size(const format &f) const; 55 virtual void build_sector_description(const format &d, uint8_t *sectdata, desc_s *sectors, int track, int head) const; 56 void check_compatibility(floppy_image *image, std::vector<int> &candidates); 57 void extract_sectors(floppy_image *image, const format &f, desc_s *sdesc, int track, int head); 58 59 private: 60 format const *const formats; 61 }; 62 63 #endif // MAME_FORMATS_UPD765_DSK_H 64