The Cray-1 was the first supercomputer of the company Cray, whose architecture was developed by the team around Seymour Cray. Seymour Cray was responsible thereby for the technology the vector register. The first Cray-1 was taken 1976 at the Los Alamos national to Laboratory in enterprise.

Description

The Cray-1A weighed 5.5 tons including the Freon of cooling system. It had a horseshoe form, in order to keep the cable lengths short within the housing. There were no cables, which were longer than 1.2 meters. The Cray-1A was an array processor and contained additionally 200,000 specialized ECL circuit-equipped with at that time a clock frequency of 80 megahertz, 64 vector registers, enormous for conditions, in the word width of 64 bits as well as one million very much quick 64 bits long memory, according to 8 megabyte RAM, reached the Cray-1A over 80 million floating point number of operations per second. With a later variant of the Cray-1 this value was increased even to 133 MFLOPS. Released by the 1 million memory cells used Cray-1A including current supply 115 KW. If one to it-counts the cooling, the value approximately verdoppelt.1978 was published the first standard software package for the Cray-1. It consisted of

• an operating system, the Cray operating system (COS), which late Unix variant specific by a Cray, which was replaced UniCOS,
• the Cray assembler LANGUAGE (CAL) and
• Cray FORTRAN, a FORTRAN compiler, which could vektorisieren as the first fully automatic.

History

National the center for Atmospheric Research (NCAR) was in July 1977 the first official commercial customer of the company Cray. N"´CAR paid to 1 million 8,86 million US Dollar, of it for the memory. This Cray-1 was taken only 1989 out of operation. With prices between 5 millions and 8 million dollar approximately 80 Cray-1 were world-wide sold.

1982 were replaced the Cray-1 by the 500 MFLOPS fast Cray X-MP, which was the first multi-processor machine of the company Cray. 1985 came then the Cray-2 very much progressed on the market. This was already able 1,9 GFLOPS in the point to reaches. The success of this variant was missing however, so that a somewhat more conservative variant than successors of the Cray-1 and the Cray X-MP was developed and 1988 under the name Cray Y-MP was sold.

See also

Cray, Cray-2, Cray-3, Cray-4

Related links

• '' CRAY-1 computer system hardware Reference manual '', Publication No. 2240004 Rev.C 11/77 - first three chapters (from the copy in the collection of the DigiBarn computer museum, digitized and into HTML transfer by OD Thelen)

Articles in category "Cray-1"

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