// license:BSD-3-Clause
// copyright-holders: Ansgar Kückes, F. Ulivi
/*********************************************************************
hpi_dsk.h
"HPI" disk format
*********************************************************************/
#pragma once
#ifndef _HPI_DSK_H_
#define _HPI_DSK_H_
#include "flopimg.h"
// Geometry constants
constexpr unsigned HPI_TRACKS = 77;
constexpr unsigned HPI_HEADS = 2;
constexpr unsigned HPI_SECTORS = 30;
constexpr unsigned HPI_SECTOR_SIZE = 256;
class hpi_format : public floppy_image_format_t
{
public:
hpi_format();
virtual int identify(io_generic *io, uint32_t form_factor) override;
virtual bool load(io_generic *io, uint32_t form_factor, floppy_image *image) override;
virtual bool save(io_generic *io, floppy_image *image) override;
virtual const char *name() const override;
virtual const char *description() const override;
virtual const char *extensions() const override;
virtual bool supports_save() const override;
private:
typedef std::array<uint8_t , HPI_SECTORS> sector_list_t;
static void interleaved_sectors(unsigned il_factor , sector_list_t& sector_list);
void write_mmfm_bit(std::vector<uint32_t> &buffer , bool data_bit , bool clock_bit);
void write_mmfm_byte(std::vector<uint32_t> &buffer , uint8_t data , uint8_t clock = 0);
void write_sync(std::vector<uint32_t> &buffer);
void write_crc(std::vector<uint32_t> &buffer , uint16_t crc);
void write_sector(std::vector<uint32_t> &buffer , uint8_t track_no , uint8_t sect_head_no , const uint8_t *sect_data);
void fill_with_gap3(std::vector<uint32_t> &buffer);
static unsigned chs_to_lba(unsigned cylinder , unsigned head , unsigned sector);
std::vector<uint8_t> get_next_id_n_block(const uint8_t *bitstream , int bitstream_size , int& pos , int& start_pos);
bool get_next_sector(const uint8_t *bitstream , int bitstream_size , int& pos , unsigned& track , unsigned& head , unsigned& sector , uint8_t *sector_data);
static const uint8_t m_track_skew[ HPI_SECTORS - 1 ][ HPI_HEADS ];
};
extern const floppy_format_type FLOPPY_HPI_FORMAT;
#endif /* _HPI_DSK_H_ */