Cassette Aided Operation System

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CAOS
KC85-4 CAOS.gif

Operating system for the KC 85 .
developer Germany Democratic Republic 1949GDR Combine Microelectronics Erfurt
License (s) Information is missing
First publ. 1984
Current  version 4.2 (1st quarter 1989)
Languages) English
Others Development stopped

The Cassette Aided Surgical System ( CAOS , cassette-based operating system) is in the 1980s in the German Democratic Republic developed computer - operating system , which among other things, the operation of the small computer KC 85/2 to 85/4 KC possible. It is controlled via a command line , data processing is possible with an 8-bit bandwidth. CAOS occupies around 4 kilobytes of ROM memory, and other data is stored on audio cassettes.

As software developed independently in the GDR, CAOS is incompatible with the computers / operating systems common in western countries. The work on CAOS was stopped after the reunification of Germany , because the hardware necessary for operation was no longer manufactured.

Versions

  • CAOS 2.2 (HC 900, KC 85/2)
  • CAOS 3.1 (KC 85/3)
  • CAOS 4.2 (KC 85/4)

Unpublished versions

A flyer dated June 11, 1990 listed the following versions that apparently did not appear:

  • CAOS 5.0 (KC 85/4)
  • OS / pi 90 (KC 82 / 2-3)

Homebrew developments

Since the fall of the Wall, private users have been developing new versions, some of which require some modifications to the hardware (so-called KC 85/5 ):

  • CAOS 4.3 (KC 85/4)
  • CAOS 4.4 (KC 85/4)

Web links

Individual evidence

  1. ↑ Sven Stillich: GDR computer: With kilobytes against the class enemy . In: Spiegel Online . December 22, 2009 ( spiegel.de [accessed December 11, 2018]).
  2. ↑ Offer for the KC85 / 2/3/4 system. (jpeg) Retrieved December 11, 2018 .
  3. ↑ https://www.iee.et.tu-dresden.de/~kc-club/02/KCN02-01/KCN02-01-04.HTML