NABU Network

NABU Network

The NABU Network was an early home computer system which was linked to a precursor of the Internet, operating over cable TV. It operated from 1982 to 1985, primarily in Ottawa, Canada. Its functionality was then revolutionary, though it was not a commercial success.

Functionality

Families, schools, or individuals would purchase a NABU Network PC, which would be connected via cable TV to NABU's servers. In addition to normal PC capabilities of the time, the computer could download software and information content through the cable feed and could upload primitive information back up to the servers. Applications included games, the programming language Logo, news/current events, and rudimentary PC banking/shopping. At its peak, approximately 100 applications were available.

The Nabu Network PC cost $950 CAD, approximately the same price as the wildly successful Commodore 64 at the time, and the network service cost $8 to $10 per month.[1]

Hardware

The heart of a NABU (which stands for Natural Access to Bi-directional Utilities) PC was the Z80A processor chip (running at a then lightning-fast 3.57 MHz) and the cutting-edge TI 9918 video chip, which was able to produce some very good graphics for its time. All this was served up via a Gould SEL mainframe. The logic module included four socketed chips: a TR1865CL-04, a full-duplex UART, an SC87253P 8-bit microprocessor, an N8X60N FIFO I/O controller and a pre-programmed ROM. The remainder of the parts on the board were numerous 74LS series logic ICs. There was an RF module that down-converted signals from the cable connection and up-converted requests to be sent to the server. There were four circuit boards for frequency synthesis, data in and out and RF conversion and dual helical coil bandpass filters.

Download speeds over the cable TV line were up to 6.4 Mbit/second.

By default, the PCs lacked any individual offline storage, but an optional hard drive could be purchased.

Business success

The NABU service first became available in 1982 through Ottawa Cablevision, through the efforts of John Kelly and Bruce Hempell. The project was heavily subsidized by the Canadian government. A major weakness of the Ottawa network was the strictly one-way connection as it was implemented on Ottawa Cablevision. The cost of upgrading the existing cable infrastructure to a true bi-directional network (NABU was bi-directional but the cable network couldn't support this) was, according to former NABU developer Mike Slinn, "a show-stopper" because the demand just didn't justify the investment – a prime example of the "chicken and the egg" conundrum.

Another network was started in Japan. However, NABU never achieved commercial success and ceased operation in 1985.

References

External links


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Nabu Network — NOTOC The Nabu Network was a microcomputer system which was linked to a precursor of the Internet in the 1980s primarily in Ottawa, Canada. It is now obsolete but was then revolutionary, if unsuccessful.Families would buy a Nabu Network PC, which …   Wikipedia

  • Nabu (disambiguation) — Nabu may refer to: Naturschutzbund Deutschland or NABU, the German Nature Conservation Society. Nabu, the Babylonian god of wisdom and writing. Nabu is the ancient Babylonian name for the planet Mercury. Nabu, a DC Comics character, the most… …   Wikipedia

  • Naturschutzbund Deutschland — Coordinates: 52°31′23″N 13°22′43″E / 52.523136°N 13.378625°E / 52.523136; 13.378625 NABU r …   Wikipedia

  • Videotex — (or interactive videotex ) was one of the earliest implementations of an end user information system . From the late 1970s to mid 1980s, it was used to deliver information (usually pages of text) to a user in computer like format, typically to be …   Wikipedia

  • List of machines running CP/M — Many microcomputer makes and models could run some version or derivation of the CP/M disk operating system. Eight bit computers running CP/M 80 were built around an Intel 8080/85, Zilog Z80, or compatible CPU (for CP/M 80). CP/M 86 ran on the… …   Wikipedia

  • Mesopotamia, history of — ▪ historical region, Asia Introduction  history of the region in southwestern Asia where the world s earliest civilization developed. The name comes from a Greek word meaning “between rivers,” referring to the land between the Tigris and… …   Universalium

  • Winx Club — The Italian title card for the series second season and third season. Genre Contemporary fantasy, Science fantasy, Magical girl, Henshin …   Wikipedia

  • Winx Club — Logo du Winx Club en 2010 Titre original Winx Club Genre Série d animation, d aventure / fantasy Créateur(s) Iginio Straffi Production …   Wikipédia en Français

  • Winx Club — Título Winx Club Género Fantasía, dibujos animados, Magia, Amor Creado por Iginio Straffi País de origen …   Wikipedia Español

  • Fehmarnbelt-Brücke — Die Neutralität dieses Artikels oder Abschnitts ist umstritten. Eine Begründung steht auf der Diskussionsseite. Dieser Artikel od …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”