File:PerCom Cassette Interface Dec 1977.jpg

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Original file ‎(2,165 × 1,473 pixels, file size: 986 KB, MIME type: image/jpeg)

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Summary

Description
English: PerCom Data Co. was started by Harold Mauch in 1976 to manufacture peripherals for early home computers. Byte magazine sponsored a conference in Kansas City to define a standard for storing data on audio cassettes. Mauch attend that conference and wrote an article for Byte showing an example design. The CI-810 Cassette Interface was PerCom's first product. It connected to a parallel port and was followed by the CIS-30+ that connect to a serial port. These interfaces were typically used with Motorola 6800 based computers such as the SWTPC6800. The "Kansas City" standard recorded binary data using two tones (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.
Date
Source Scanned from the December 1977 Byte magazine (page 19) by Michael Holley Swtpc6800
Author PerCom Data Co, Garland, Texas
Permission
(Reusing this file)

This advertisement did not have a copyright notice and is in the public domain.

From the US Copyright Office Circular 3. Page 3, Contributions to Collective Works. (A magazine is a "collective work.")

A notice for the collective work will not serve as the notice for advertisements inserted on behalf of persons other than the copyright owner of the collective work. These advertisements should each bear a separate notice in the name of the copyright owner of the advertisement.

Other versions
  • CI-810 Cassette Interface
    CI-810 Cassette Interface
  • CIS-30+ Cassette Interface
    CIS-30+ Cassette Interface

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current00:34, 30 January 2012Thumbnail for version as of 00:34, 30 January 20122,165 × 1,473 (986 KB)wikimediacommons>Swtpc6800=={{int:filedesc}}== {{Information |Description={{en|1= PerCom Data Co. was started by Harold Mauch in 1976 to manufacture peripherals for early home computers. Byte magazine sponsored a conference in Kansas City to define a standard for storing data on

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