CALDIC

CALDIC

CALDIC (the California Digital Computer) was an electronic digital computer built with the assistance of the Office of Naval Research at the University of California, Berkeley between 1951 and 1955 to assist and enhance research being conducted at the university with a platform for high-speed computing.

CALDIC was designed to be constructed at a low cost and simple to operate. It was a serial decimal machine with an 8-inch diameter, 10,0000 word magnetic drum memory. (As CALDIC's decimal words were 10 digits each, the magnetic memory could store about 400,000 bits.) It contained 1300 vacuum tubes, 1000 crystal diodes, 100 magnetic elements (for the recording heads), and 12 relays (in the power supply). It was capable of speeds of 50 iterations per second. CALDIC was a stored program computer with a 6-digit instruction format (2 digits for the opcode and 4 digits for the memory address).

The computer was initially planned by Paul Morton, Leland Cunningham, and Dick Lehmer; the latter two had been involved with the ENIAC at the University of Pennsylvania, and Lehmer had given one of the Moore School Lectures. Morton oversaw the the design and construction with a team comprising electrical engineering graduate and undergraduate students at the university, more than 35 in total, including Doug Engelbart (who later invented the computer mouse) and Al Hoagland (a pioneer of the computer disk industry).

The machine was mostly operational in 1954. Development cost through July, 1955 was approximately $150,000.

External links

* [http://www.cs.berkeley.edu/~pattrsn/Arch/prototypes2.html Berkeley Hardware Prototypes]
* [http://ed-thelen.org/comp-hist/BRL-a-d.html#CALDIC A Survey of Domestic Electronic Digital Computing Systems]
* [http://www.cs.berkeley.edu/~pattrsn/Arch/CALDIC/index.html CALDIC photos and diagrams]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Энгельбарт, Дуглас — Д р. Дуглас Карл Энгельбарт Douglas Carl Engelbart …   Википедия

  • Douglas Engelbart — Douglas Carl Engelbart ( Doug ) …   Wikipedia

  • Derrick Henry Lehmer — Born February 23, 1905(1905 02 23) Berkeley, California Died May 22, 1991(1991 05 22) (aged&# …   Wikipedia

  • Hexamine — Chembox new ImageFile=Hexamine.png ImageSize=120px IUPACName=1,3,5,7 Tetraazatricyclo [3.3.1.13,7] decane OtherNames=Hexamine; Methenamine; Urotropine ;Hexamethylenetetramine Section1= Chembox Identifiers CASNo=100 97 0 EINECS=202 905 8… …   Wikipedia

  • Office of Naval Research — ONR logo The Office of Naval Research (ONR), headquartered in Arlington, Virginia (Ballston), is the office within the United States Department of the Navy that coordinates, executes, and promotes the science and technology programs of the U.S.… …   Wikipedia

  • Leland Cunningham — Leland Erskin Cunningham (born 19 February 1904 in Wiscasset, Maine; died May 31,1989 in Richmond, California) was an American astronomer. In a career spanning 50 years, he became an authority on orbit theory and on precise measurements of the… …   Wikipedia

  • Moore School Lectures — Theory and Techniques for Design of Electronic Digital Computers (popularly called the Moore School Lectures ) was a course in the construction of electronic digital computers held at the University of Pennsylvania s Moore School of Electrical… …   Wikipedia

  • Remy Zaugg — Rémy Zaugg (* 11. Januar 1943 in Courgenay, Jura, Schweiz; † 23. August 2005 in Basel) war ein Schweizer Maler und wurde vor allem als Konzeptkünstler bekannt. Inhaltsverzeichnis 1 Leben 2 Ausstellungen 3 L …   Deutsch Wikipedia

  • Rémy Zaugg — (* 11. Januar 1943 in Courgenay, Jura, Schweiz; † 23. August 2005 in Basel) war ein Schweizer Maler und wurde vor allem als Konzeptkünstler bekannt. Inhaltsverzeichnis 1 Leben 2 Ausstellungen 3 …   Deutsch Wikipedia

  • Denis Darzacq — (né en 1961 à Paris) est un photographe français, membre de l Agence VU et représenté par la Galerie VU . Diplômé de l’École nationale supérieure des arts décoratifs en 1986, Denis Darzacq débute sa carrière en suivant la scène rock française et… …   Wikipédia en Français

Share the article and excerpts

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