IBM 704 - Revision history

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{{Infobox Machine
| name = IBM 704
| manufacturer = [[International Business Machines]]
| year announced = May, 1954

| year discontinued = April, 1960
| form factor = [[mainframe]]
| word size = 36 bits


| logic type = [[vacuum tube]]s

| clock speed = 24 μsec (basic add instruction)<br>
240 μsec (basic multiply instruction)
| memory speed = 12 μsec

| predecessor = [[IBM 701]]
| successor = [[IBM 709]]

}}

The '''IBM 704''' was IBM's first commercially successful [[vacuum tube]] scientific [[mainframe]] (built at a time when computers for scientific and business computing used separate [[instruction set]]s). It was announced in May, 1954; 136 were sold.

The major advances over its predecessor, the [[IBM 701]], included [[core memory]], instead of the [[Williams tube]] electrostatic cathode ray tubes previously used for [[main memory]] in the 701; and support for [[floating point]] in hardware (supposedly the first mass-produced machine to do so).

The [[instruction set]] of the 704 was not compatible with the 701; the later [[IBM 709]], [[IBM 7090]], and [[IBM 7094]] did use an upwardly-compatible instruction set, so the 704 did found a major family.

[[FORTRAN]] was produced for, and first implemented on, this computer.

==Further reading==

* Charles J. Bashe, Lyle R. Johnson, John H. Palmer, Emerson W. Pugh, ''IBM's Early Computers'', MIT Press, Cambridge, 1986

==External links==

* [https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP704.html 704 Data Processing System] - IBM Archive page
* [http://www.zl2al.com/category/ibm-704-computer/ IBM 704 Scientific Computer]
* [http://www.quadibloc.com/comp/cp0309.htm From the IBM 704 to the IBM 7094]
* [http://www.computer-history.info/Page4.dir/pages/IBM.704.dir/ The IBM 704 and 709 Systems]

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[[Category:IBM Computers]]

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 * [http://www.computer-history.info/Page4.dir/pages/IBM.704.dir/ The IBM 704 and 709 Systems]
-{{stub}}
+{{semi-stub}}
-[[Category:IBM Mainframes]]
+[[Category: IBM Mainframes]]

@@ Line 22: / Line 22: @@
 The '''IBM 704''' was IBM's first commercially successful [[vacuum tube]] scientific [[mainframe]] (built at a time when computers for scientific and business computing used separate [[instruction set]]s). It was announced in May, 1954; 136 were sold.
-The major advances over its predecessor, the [[IBM 701]], included [[core memory]], instead of the [[Williams tube]] electrostatic [[cathode ray tube]]s previously used for [[main memory]] in the 701; and support for [[floating point]] in [[hardware]] (supposedly the first mass-produced machine to do so).
+The major advances over its predecessor, the [[IBM 701]], included [[core memory]], instead of the [[Williams tube]]s previously used for [[main memory]] in the 701; and support for [[floating point]] in [[hardware]] (supposedly the first mass-produced machine to do so).
 The [[instruction set]] of the 704 was not compatible with the 701; the later [[IBM 709]], [[IBM 7090]], and [[IBM 7094]] did use an upwardly-compatible instruction set, so the 704 founded a major family.

@@ Line 22: / Line 22: @@
 The '''IBM 704''' was IBM's first commercially successful [[vacuum tube]] scientific [[mainframe]] (built at a time when computers for scientific and business computing used separate [[instruction set]]s). It was announced in May, 1954; 136 were sold.
-The major advances over its predecessor, the [[IBM 701]], included [[core memory]], instead of the [[Williams tube]] electrostatic cathode ray tubes previously used for [[main memory]] in the 701; and support for [[floating point]] in hardware (supposedly the first mass-produced machine to do so).
+The major advances over its predecessor, the [[IBM 701]], included [[core memory]], instead of the [[Williams tube]] electrostatic [[cathode ray tube]]s previously used for [[main memory]] in the 701; and support for [[floating point]] in [[hardware]] (supposedly the first mass-produced machine to do so).
-The instruction set of the 704 was not compatible with the 701; the later [[IBM 709]], [[IBM 7090]], and [[IBM 7094]] did use an upwardly-compatible instruction set, so the 704 founded a major family.
+The [[instruction set]] of the 704 was not compatible with the 701; the later [[IBM 709]], [[IBM 7090]], and [[IBM 7094]] did use an upwardly-compatible instruction set, so the 704 founded a major family.
 [[FORTRAN]] was produced for, and first implemented on, this computer. [[LISP]] was also first done on the 704.

← Older revision		Revision as of 03:08, 12 June 2018
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−	[[Category:IBM ~~Computers~~]]	+	[[Category:IBM Mainframes]]

@@ Line 24: / Line 24: @@
 The major advances over its predecessor, the [[IBM 701]], included [[core memory]], instead of the [[Williams tube]] electrostatic cathode ray tubes previously used for [[main memory]] in the 701; and support for [[floating point]] in hardware (supposedly the first mass-produced machine to do so).
-The [[instruction set]] of the 704 was not compatible with the 701; the later [[IBM 709]], [[IBM 7090]], and [[IBM 7094]] did use an upwardly-compatible instruction set, so the 704 did found a major family.
+The instruction set of the 704 was not compatible with the 701; the later [[IBM 709]], [[IBM 7090]], and [[IBM 7094]] did use an upwardly-compatible instruction set, so the 704 founded a major family.
 [[FORTRAN]] was produced for, and first implemented on, this computer. [[LISP]] was also first done on the 704.

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 | logic type = [[vacuum tube]]s
 <!-- | design type =  -->
-| clock speed = 24 μsec (basic add instruction)<br>
+| instruction speed = 24 μsec (basic add)<br>
-μsec (basic multiply instruction)
+μsec (basic multiply)
 | memory speed = 12 μsec
 <!-- | operating system = SOS, IBSYS, IBJOB -->