1 // license:BSD-3-Clause 2 // copyright-holders: Ansgar Kückes, F. Ulivi 3 /********************************************************************* 4 5 hpi_dsk.h 6 7 "HPI" disk format 8 9 *********************************************************************/ 10 #ifndef MAME_FORMATS_HPI_DSK_H 11 #define MAME_FORMATS_HPI_DSK_H 12 13 #pragma once 14 15 #include "flopimg.h" 16 17 #include <array> 18 #include <vector> 19 20 // Geometry constants 21 constexpr unsigned HPI_TRACKS = 77; 22 constexpr unsigned HPI_HEADS = 2; 23 constexpr unsigned HPI_SECTORS = 30; 24 constexpr unsigned HPI_SECTOR_SIZE = 256; 25 26 class hpi_format : public floppy_image_format_t 27 { 28 public: 29 hpi_format(); 30 31 virtual int identify(io_generic *io, uint32_t form_factor) override; 32 virtual bool load(io_generic *io, uint32_t form_factor, floppy_image *image) override; 33 virtual bool save(io_generic *io, floppy_image *image) override; 34 virtual const char *name() const override; 35 virtual const char *description() const override; 36 virtual const char *extensions() const override; 37 virtual bool supports_save() const override; 38 39 private: 40 typedef std::array<uint8_t , HPI_SECTORS> sector_list_t; 41 static bool geometry_from_size(uint64_t image_size , unsigned& heads , unsigned& tracks); 42 static void interleaved_sectors(unsigned il_factor , sector_list_t& sector_list); 43 void write_mmfm_bit(std::vector<uint32_t> &buffer , bool data_bit , bool clock_bit); 44 void write_mmfm_byte(std::vector<uint32_t> &buffer , uint8_t data , uint8_t clock = 0); 45 void write_sync(std::vector<uint32_t> &buffer); 46 void write_crc(std::vector<uint32_t> &buffer , uint16_t crc); 47 void write_sector(std::vector<uint32_t> &buffer , uint8_t track_no , uint8_t sect_head_no , const uint8_t *sect_data); 48 void fill_with_gap3(std::vector<uint32_t> &buffer); 49 static unsigned chs_to_lba(unsigned cylinder , unsigned head , unsigned sector , unsigned heads); 50 std::vector<uint8_t> get_next_id_n_block(const uint8_t *bitstream , int bitstream_size , int& pos , int& start_pos); 51 bool get_next_sector(const uint8_t *bitstream , int bitstream_size , int& pos , unsigned& track , unsigned& head , unsigned& sector , uint8_t *sector_data); 52 53 static const uint8_t m_track_skew[ HPI_SECTORS - 1 ][ HPI_HEADS ]; 54 }; 55 56 extern const floppy_format_type FLOPPY_HPI_FORMAT; 57 58 #endif // MAME_FORMATS_HPI_DSK_H 59