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22 lines
892 B
Plaintext
22 lines
892 B
Plaintext
I think these plot files were originally collected by Chuck Forsberg,
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but may have been altered by others. Thanks to Jos Dreesen who has
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kept them on his ftp site. Use them for your personal use only. This
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directory is not part of the GNU public license of the repository.
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Tektronix developed a number of graphics terminals based on their
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green phosphor direct view bistable storage tubes in the 1960s
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and 1970s. Google "DVBST".
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Demonstrating these terminals initially required a computer, either
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a heavy minicomputer or a slow modem link to a timesharing machine.
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After introducing the 4010 he developed the Audio Recorder Interface
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(ARI) board. A Sony Cassette recorder and a good chrome tape
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recorded 9600 bps data with a reasonable error rate.
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Many of the .plt files in this directory were copied from
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cassette tapes recorded in the 70s. Some have errors ("line hits")
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in them.
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