IBM 7090

Specialty Definition: IBM 7090

Domain	Definition
Computing	IBM 7090 A transistorised version of the IBM 709 which was a very popular high end computer in the early 1960s. The 7090 had 32Kbytes of 36-bit core memory and a hardware floating point unit. Fortran was its most popular language, but it supported many others. It was later upgraded to the IBM 7094, and a scaled down version, the IBM 7040 was also introduced. IBM 7090s controlled the Mercury and Gemini space flights, the Balistic Missile Early Warning System (until well into the 1980s), and the CTSS time sharing system at MIT. The 7090 was not good at unit record I/O, so in small configurations an IBM 1401 was used for SPOOL I/O and in large configurations (such as a 7090/94) a 7040/44 would be directly coupled and dedicated to handling printers and card readers. (See the film Dr Strangelove). (1999-01-19). Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

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Specialty Definition: IBM 7090

(From Wikipedia, the free Encyclopedia)

The IBM 7090 a second-generation transistorized version of the earlier IBM 709 vacuum tube mainframe computers and was designed for "large-scale scientific and technological applications", was the third member of the IBM 700/7000 series. The first 7090 installation was in November 1959.

The 7090 used a 36-bit "word", with an address-space of 32K (32,768) words. It operated with a basic clock cycle of 2.18 μs.

Instruction Format

The basic instruction format was a 3-bit prefix, 15-bit decrement, 3-bit tag, and 15-bit address. The prefix field specified the class of instruction. The decrement field often contained an immediate operand to modify the results of the operation, or was used to further define the instruction type. The three bits of the tag specified three index registers, the contents of which were subtracted from the address to produce an effective address. The address field either contained an address or an immediate operand.

Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "IBM 7090."

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Crosswords: IBM 7090

Specialty definitions using "IBM 7090": 9PAC ♦ Automated Engineering Design ♦ Basic Operating System, BMDP ♦ Core Wars ♦ Digital Simulation Language ♦ IBM 360, IBM 7040, IBM 709, IBM 7094, Information Processing Language ♦ Michigan Algorithm Decoder ♦ SIMSCRIPT ♦ Tape Operating System. (references)

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Anagrams: IBM 7090

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "0-0-7-9-b-i-m"
	-4 letters: mib.
	-5 letters: bi, mi.
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