// license:BSD-3-Clause // copyright-holders:Olivier Galibert /********************************************************************* formats/upd765_dsk.h helper for simple upd765-formatted disk images *********************************************************************/ #ifndef MAME_FORMATS_UPD765_DSK_H #define MAME_FORMATS_UPD765_DSK_H #pragma once #include "flopimg.h" class upd765_format : public floppy_image_format_t { public: struct format { uint32_t form_factor = 0U; // See floppy_image for possible values uint32_t variant = 0U; // See floppy_image for possible values uint32_t encoding = 0U; // See floppy_image for possible values int cell_size; // See floppy_image_format_t for details int sector_count; int track_count; int head_count; int sector_base_size; int per_sector_size[40]; // if sector_base_size is 0 int sector_base_id; // 0 or 1 usually, -1 if there's interleave 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] int gap_4a; // Usually 80 - number of 4e between index and IAM sync int gap_1; // Usually 50 - number of 4e between IAM and first IDAM sync int gap_2; // 22 for <=1.44Mb, 41 for 2.88Mb - number of 4e between sector header and data sync int gap_3; // Usually 84 - number of 4e between sector crc and next IDAM }; // End the array with {} upd765_format(const format *formats); virtual int identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const override; virtual bool load(util::random_read &io, uint32_t form_factor, const std::vector &variants, floppy_image &image) const override; virtual bool save(util::random_read_write &io, const std::vector &variants, const floppy_image &image) const override; virtual bool supports_save() const noexcept override; protected: floppy_image_format_t::desc_e* get_desc_fm(const format &f, int ¤t_size, int &end_gap_index) const; floppy_image_format_t::desc_e* get_desc_mfm(const format &f, int ¤t_size, int &end_gap_index) const; int find_size(util::random_read &io, uint32_t form_factor, const std::vector &variants) const; int compute_track_size(const format &f) const; virtual void build_sector_description(const format &d, uint8_t *sectdata, desc_s *sectors, int track, int head) const; void check_compatibility(const floppy_image &image, std::vector &candidates) const; void extract_sectors(const floppy_image &image, const format &f, desc_s *sdesc, int track, int head) const; private: format const *const formats; }; #endif // MAME_FORMATS_UPD765_DSK_H