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77 lines
1.4 KiB
C++
77 lines
1.4 KiB
C++
//
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// TapePRG.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 14/08/2016.
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// Copyright 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Storage_Tape_PRG_hpp
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#define Storage_Tape_PRG_hpp
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#include "../Tape.hpp"
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#include "../../FileHolder.hpp"
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#include <cstdint>
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#include <string>
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namespace Storage {
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namespace Tape {
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/*!
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Provides a @c Tape containing a .PRG, which is a direct local file.
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*/
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class PRG: public Tape {
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public:
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/*!
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Constructs a @c T64 containing content from the file with name @c file_name, of type @c type.
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@param file_name The name of the file to load.
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@throws ErrorBadFormat if this file could not be opened and recognised as the specified type.
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*/
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PRG(const std::string &file_name);
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enum {
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ErrorBadFormat
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};
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// implemented to satisfy @c Tape
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bool is_at_end();
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private:
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FileHolder file_;
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Pulse virtual_get_next_pulse();
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void virtual_reset();
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uint16_t load_address_;
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uint16_t length_;
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enum FilePhase {
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FilePhaseLeadIn,
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FilePhaseHeader,
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FilePhaseHeaderDataGap,
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FilePhaseData,
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FilePhaseAtEnd
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} file_phase_ = FilePhaseLeadIn;
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int phase_offset_ = 0;
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int bit_phase_ = 3;
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enum OutputToken {
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Leader,
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Zero,
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One,
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WordMarker,
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EndOfBlock,
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Silence
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} output_token_;
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void get_next_output_token();
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uint8_t output_byte_;
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uint8_t check_digit_;
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uint8_t copy_mask_ = 0x80;
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};
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}
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}
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#endif /* T64_hpp */
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