IBM 7070 is a decimal-architecture intermediate data-processing system that was introduced by IBM in 1958.[1] It was part of the IBM 700/7000 series, and was based on discrete transistors rather than the vacuum tubes of the 1950s. It was the company's first transistorized stored-program computer.[2]
IBM 7070 transistor circuit SMS boards
The 7070 was expected to be a "common successor to at least the 650 and the 705".[3] The 7070 was not designed to be compatible with the 650 instruction set, as the latter had a second jump address in every instruction to allow optimal use of the drum, something unnecessary and wasteful in a computer with random-access core memory. As a result, a simulator was needed to run old programs. The 7070 was also marketed as an IBM 705 upgrade, but failed miserably due to its incompatibilities, including an inability to fully represent the 705 character set;[citation needed] forcing IBM to quickly introduce the IBM 7080 as a "transistorized IBM 705" that was fully compatible.
The 7070 series stored data in words containing 10 decimal digits plus a sign. Digits were encoded using a two-out-of-five code. Characters were represented by a two-digit code. The machine shipped with 5,000 or 9,990 words of core memory[4] and the CPU speed was about 27KIPS.[citation needed] A typical system was leased for $17,400 per month or could be purchased for $813,000.
The 7070 weighed 23,150 pounds (11.6 short tons; 10.5 t).[5]
Later systems in this series were the faster IBM 7074 introduced in July 1960[6]
and the IBM 7072 (1961), a less expensive system using the slower 7330 instead of 729 tape drives. The 7074 could be expanded to 30K words. They were eventually replaced by the System/360, announced in 1964.
^Trucks, sheep and the IBM 7070, IBM
^Emerson W. Pugh, Lyle R. Johnson, John H. Palmer, IBM's 360 and early 370 systems, MIT Press, 1991, ISBN 0-262-16123-0, p. 50
^Bashe, Charles J.; Johnson, Lyle R; Palmer, John H.; Pugh, Emerson W. (1986). IBM's Early Computers. MIT. p. 473. ISBN 0-262-02225-7.
^IBM 7070 Reference Manual(PDF). IBM. pp. 8–9. A22-7003-1.
^Weik 1961.
^"A Quicker Computer Introduced by I.B.M.". New York Times. July 8, 1960. p. 29.
IBM7070 is a decimal-architecture intermediate data-processing system that was introduced by IBM in 1958. It was part of the IBM 700/7000 series, and...
programming language originally was created by IBM for their 1401 systems. IBM later produced implementations for the 7070/72/74 and System/360; RPG II became the...
eventually also were Autocoders for the IBM 1410 and 7010, IBM 7030 (Stretch), 7070/7072/7074, IBM 7080, and the IBM 1400 series. Symbolic Programming System...
50,000 sectors. The IBM 7300 Disk Storage Unit was designed for use with the IBM7070; IBM announced a model 2 in 1959, but when IBM announced the 1301...
the vacuum-tube IBM 705 computer. The 7080 weighed about 19,700 pounds (9.9 short tons; 8.9 t). After the introduction of the IBM7070, in June 1960, as...
with the IBM7070, a ten-digit-word decimal machine. It was followed in 1959 by the IBM 7090, a 36-bit scientific machine, the highly popular IBM 1401 designed...
The IBM7070 (signed 10-digit decimal words), announced 1958, was expected to be a "common successor to at least the 650 and the [IBM] 705". The IBM 1620...
basis for the IBM 7090 line of scientific computers, the IBM7070 and 7080 business computers, the IBM 7040 and IBM 1400 lines, and the IBM 1620 small scientific...
to transistors. As a result, the successor to the IBM 650 used transistors, and it became the IBM7070—the company's first transistorized stored-program...
reels of magnetic tape, although “spool” is an uncommon usage. IBM SPOOL System, 7070-IO-076 Integrated facility of various operating systems, e.g., GCOS...
packages which could be slipped in and out." The 1958 decimal architecture IBM7070 was the first transistor computer to be fully programmable. It had about...
were register addresses at the high end of the address range, e.g., IBM 650, IBM7070, the trend has been to use only register address at the low end and...
about only twenty units sold worldwide. Its main competitors included the IBM7070, 7090, and 7030 "Stretch". The last Gamma 60 remained in service until...
Johnson, received an IBM7070 computer the following year. Brown granted computer sciences full Departmental status in 1979. In 2009, IBM and Brown announced...
computers that were exclusively decimal include the ENIAC, IBM NORC, IBM 650, IBM 1620, IBM7070, UNIVAC Solid State 80. In these machines, the basic unit...
Global Information
