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43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
#ifndef NORTHSTAR_H
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#define NORTHSTAR_H
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/* Northstar floppies are 10-hard sectored disks with a sector format as
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* follows:
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*
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* |----------------------------------|
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* | SYNC Byte | Payload | Checksum |
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* |------------+----------+----------|
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* | 1 (0xFB) | 256 (SD) | 1 |
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* | 2 (0xFBFB) | 512 (DD) | |
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* |----------------------------------|
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*
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*/
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#define NORTHSTAR_PREAMBLE_SIZE_SD (16)
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#define NORTHSTAR_PREAMBLE_SIZE_DD (32)
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#define NORTHSTAR_HEADER_SIZE_SD (1)
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#define NORTHSTAR_HEADER_SIZE_DD (2)
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#define NORTHSTAR_PAYLOAD_SIZE_SD (256)
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#define NORTHSTAR_PAYLOAD_SIZE_DD (512)
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#define NORTHSTAR_CHECKSUM_SIZE (1)
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#define NORTHSTAR_ENCODED_SECTOR_SIZE_SD \
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(NORTHSTAR_HEADER_SIZE_SD + NORTHSTAR_PAYLOAD_SIZE_SD + \
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NORTHSTAR_CHECKSUM_SIZE)
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#define NORTHSTAR_ENCODED_SECTOR_SIZE_DD \
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(NORTHSTAR_HEADER_SIZE_DD + NORTHSTAR_PAYLOAD_SIZE_DD + \
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NORTHSTAR_CHECKSUM_SIZE)
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class Decoder;
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class Encoder;
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class EncoderProto;
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class DecoderProto;
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extern uint8_t northstarChecksum(const Bytes& bytes);
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extern std::unique_ptr<Decoder> createNorthstarDecoder(
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const DecoderProto& config);
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extern std::unique_ptr<Encoder> createNorthstarEncoder(
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const EncoderProto& config);
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#endif /* NORTHSTAR */
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