// license:BSD-3-Clause // copyright-holders:Olivier Galibert #ifndef MAME_FORMATS_MFI_DSK_H #define MAME_FORMATS_MFI_DSK_H #pragma once #include "flopimg.h" class mfi_format : public floppy_image_format_t { public: mfi_format(); 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 const char *name() const noexcept override; virtual const char *description() const noexcept override; virtual const char *extensions() const noexcept override; virtual bool supports_save() const noexcept override; private: enum { TIME_MASK = 0x0fffffff, MG_MASK = 0xf0000000, MG_SHIFT = 28, OLD_MG_A = (0 << MG_SHIFT), OLD_MG_B = (1 << MG_SHIFT), OLD_MG_N = (2 << MG_SHIFT), OLD_MG_D = (3 << MG_SHIFT), MG_F = (0 << MG_SHIFT), //!< - 0, MG_F -> Flux orientation change MG_N = (1 << MG_SHIFT), //!< - 1, MG_N -> Non-magnetized zone (neutral) MG_D = (2 << MG_SHIFT), //!< - 2, MG_D -> Damaged zone, reads as neutral but cannot be changed by writing MG_E = (3 << MG_SHIFT), //!< - 3, MG_E -> End of zone RESOLUTION_SHIFT = 30, CYLINDER_MASK = 0x3fffffff }; static const char sign_old[16]; static const char sign[16]; struct header { uint8_t sign[16]; uint32_t cyl_count, head_count; uint32_t form_factor, variant; }; struct entry { uint32_t offset, compressed_size, uncompressed_size, write_splice; }; }; extern const mfi_format FLOPPY_MFI_FORMAT; #endif // MAME_FORMATS_MFI_DSK_H