INTERFACE_FOR_AUDIO_CASSETTES

Published:2009/7/14 6:42:00 Author:May | From:SeekIC

Permits use of ordinary home cassette recorder to provide high-speed loading of assembler and source program into microprocessor. Data is recorded by using variation of phase encoding, which provides self-clocking and is independent of tape speed variation. Effective I/O rate is about 500 b/s or 5 times that of low-speed paper-tape punch or reader. Article covers phase-encoding procedure, gives flowchart, and shows waveforms of pulses at five points in circuit. Parity bits provide error correction and detection, using Hamming code.-S. Kim, An Inexpensive Audio Cassette Recorder Interface for, μP's, EDN Magazine, March 5, 1976, p 83-86.



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