File:SWTPC AC30 Cassette Interface Open.jpg

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Original file ‎(1,877 × 1,437 pixels, file size: 665 KB, MIME type: image/jpeg)

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English: The Southwest Technical Products Corporation (SWTPC) AC-30 tape interface for early personal computers was introduced in May 1976 for $80. When the first home computers were introduced in 1975, floppy disk systems cost $2000. Storing data on audio cassettes was the low-cost but slow option that most hobbyists used. SWTPC designed their AC-30 Cassette Interface to meet the proposed "Kansas City Standard" data format. The binary data was recorded using 1200 Hz and 2400 Hz at a 300 baud data rate. At 30 bytes per second it took over 4 minutes to load an 8K file.
Photo taken with a Nikon E3200 camera using tungsten lighting by Michael Holley in March 2005.
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Source Own work
Author Swtpc6800 Michael Holley
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  • SWTPC 6800 Computer
    SWTPC 6800 Computer
  • SWTPC AC30 Cassette Interface
    SWTPC AC30 Cassette Interface
  • SWTPC AC30 Cassette Interface
    SWTPC AC30 Cassette Interface

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current23:34, 29 November 2011Thumbnail for version as of 23:34, 29 November 20111,877 × 1,437 (665 KB)Swtpc6800 (talk | contribs)== Summary == {{Information |Description={{en|1= The Southwest Technical Products Corporation (SWTPC) AC-30 tape interface for early personal computers was introduced in May 1976 for $80. When the first home computers were introduced in 1975, floppy disk

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