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61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
//
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// AppleGCR.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 21/04/2018.
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// Copyright 2018 Thomas Harte. All rights reserved.
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//
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#ifndef AppleGCR_hpp
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#define AppleGCR_hpp
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#include <cstdint>
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#include "../../../Disk/Track/PCMSegment.hpp"
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namespace Storage {
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namespace Encodings {
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namespace AppleGCR {
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/// Describes the standard three-byte prologue that begins a header.
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const uint8_t header_prologue[3] = {0xd5, 0xaa, 0x96};
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/// Describes the standard three-byte prologue that begins a data section.
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const uint8_t data_prologue[3] = {0xd5, 0xaa, 0xad};
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/// Describes the epilogue that ends both data sections and headers.
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const uint8_t epilogue[3] = {0xde, 0xaa, 0xeb};
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/*!
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Produces the Apple-standard four-and-four per-sector header. This is the same
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for both the 13- and 16-sector formats, and is 112 bits long.
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*/
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Storage::Disk::PCMSegment header(uint8_t volume, uint8_t track, uint8_t sector);
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/*!
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Produces the data section of a six-and-two format sector; the segment returned
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will be 2,792 bits long, encoding the first 256 bytes from @c source.
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*/
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Storage::Disk::PCMSegment six_and_two_data(const uint8_t *source);
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/*!
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Produces @c length sync six-and-two format sync bytes. The segment returned
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is @c 10*length bits long.
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*/
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Storage::Disk::PCMSegment six_and_two_sync(int length);
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/*!
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Produces the data section of a five-and-three format sector; the segment returned
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will be 3,336 bits long, encoding the first 256 bytes from @c source.
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*/
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Storage::Disk::PCMSegment five_and_three_data(const uint8_t *source);
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/*!
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Produces @c length sync five-and-three format sync bytes. The segment returned
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is @c 9*length bits long.
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*/
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Storage::Disk::PCMSegment five_and_three_sync(int length);
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}
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}
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}
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#endif /* AppleGCR_hpp */
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