Difference between revisions of "IBM System/370"

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[[Image:ibm370 in action.jpg|right|150px|thumb|People using a 370]]
 
[[Image:ibm370 in action.jpg|right|150px|thumb|People using a 370]]
  
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The '''System/370''' continued the tradition of the prior [[System/360]] by expanding the instruction set, and adding the new ability of virtualization..  It ran a variety of software, such as [[MVS]], and the newer [[VM/370]].
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The '''System/370''' continued the tradition of the prior [[System/360]] by expanding the [[instruction set]], and adding [[hardware]] support for both [[virtual memory]] (except for the first two models announced), and the new ability of [[virtualization]].
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They ran a variety of software, such as [[MVS]], and the newer [[VM/370]].
  
 
The System/370 was supplanted by the [[S/390]].
 
The System/370 was supplanted by the [[S/390]].
  
 
== Specs ==
 
== Specs ==
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*24 bit address space for a maximum 16MB of RAM.
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*Sixteen 32-bit control [[register]]s, in supervisor mode only
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*Sixteen 32-bit [[general purpose register]]s
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*Four 64-bit [[floating point]] registers (could be paired as two 128-bit floating point registers)
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*24 bit [[address space]] for a maximum 16MB of RAM (later models: 31 bits)
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==Models==
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{| class="wikitable"
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! Model !! Announced !! Shipped !! Withdrawn
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|-
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| 115 || 13 March, 1973 || March, 1974 || 9 March, 1981
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|-
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| 115-2 || 10 November, 1975 || April, 1976 || 9 March, 1981
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|-
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| 125 || 4 October, 1972 || April, 1973 || 9 March, 1981
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|-
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| 125-2 || 10 November, 1975 || February, 1976 || 9 March, 1981
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|-
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| 135 || 8 March, 1971 || April, 1972 || 16 October, 1979
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|-
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| 135-3 || 30 June, 1976 || February, 1977 || 16 October, 1979
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|-
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| 138 || 30 June, 1976 || November, 1976 || 1 November, 1983
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|-
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| 145 || 23 September, 1970 || June, 1971 || 10 November, 1971
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|-
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| 145-3 || 30 June, 1976 || May, 1977 || 16 October, 1979
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|-
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| 148 || 30 June, 1976 || January, 1977 || 1 November, 1983
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|-
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| 155 || 30 June, 1970 || January, 1971 || 23 December, 1977
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|-
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| 158 || 2 August, 1972 || April, 1973 || 15 September, 1980
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|-
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| 158-3 || 26 October, 1976 || September, 1976 || 15 September, 1980
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|-
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| 165 || 30 June, 1970 || April, 1971 || 23 December, 1977
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|-
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| 168 || 2 August, 1972 || May, 1973 || 15 September, 1980
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|-
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| 168-3 || 18 February, 1976 || June, 1976 || 15 September, 1980
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|-
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| 195 || 30 June, 1970 || August, 1973 || 9 February, 1977
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|}
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Virtual memory hardware upgrades for the Models 155 and 165 (the only S/370 models which did not support virtual memory) were announced shortly after the announcement of the Models 158 and 168, but were available only to customers who already owned a Model 155 or 165. When this was installed, these models were known as 155-II's and 165-II's.
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An Attached Processor (AP) version of the Model 158, and [[multi-processor]] versions of the Models 158 and 168, were made available in 1976; these are the “-3” updates.
  
 
== Games ==
 
== Games ==
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*[[PC/370]]
 
*[[PC/370]]
  
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{{IBM-stub}}
  
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{{IBM-stub}}
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==See also==
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[[Category:Computers]]
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[[Category:IBM Mainframes]]
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* [[IBM I/O channel]]
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[[Category:Mainframes]]
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==Further reading==
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* Emerson W. Pugh, Lyle R. Johnson, John H. Palmer, ''IBM's 360 and Early 370 Systems'', MIT Press, Cambridge, 1991
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==External link==
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* [https://web.archive.org/web/20180403200553/https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_FS370.html System/370 - Dates and characteristics]
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[[Category: IBM Mainframes]]

Latest revision as of 19:02, 9 April 2024

People using a 370

The System/370 continued the tradition of the prior System/360 by expanding the instruction set, and adding hardware support for both virtual memory (except for the first two models announced), and the new ability of virtualization.

They ran a variety of software, such as MVS, and the newer VM/370.

The System/370 was supplanted by the S/390.

Specs

Models

Model Announced Shipped Withdrawn
115 13 March, 1973 March, 1974 9 March, 1981
115-2 10 November, 1975 April, 1976 9 March, 1981
125 4 October, 1972 April, 1973 9 March, 1981
125-2 10 November, 1975 February, 1976 9 March, 1981
135 8 March, 1971 April, 1972 16 October, 1979
135-3 30 June, 1976 February, 1977 16 October, 1979
138 30 June, 1976 November, 1976 1 November, 1983
145 23 September, 1970 June, 1971 10 November, 1971
145-3 30 June, 1976 May, 1977 16 October, 1979
148 30 June, 1976 January, 1977 1 November, 1983
155 30 June, 1970 January, 1971 23 December, 1977
158 2 August, 1972 April, 1973 15 September, 1980
158-3 26 October, 1976 September, 1976 15 September, 1980
165 30 June, 1970 April, 1971 23 December, 1977
168 2 August, 1972 May, 1973 15 September, 1980
168-3 18 February, 1976 June, 1976 15 September, 1980
195 30 June, 1970 August, 1973 9 February, 1977

Virtual memory hardware upgrades for the Models 155 and 165 (the only S/370 models which did not support virtual memory) were announced shortly after the announcement of the Models 158 and 168, but were available only to customers who already owned a Model 155 or 165. When this was installed, these models were known as 155-II's and 165-II's.

An Attached Processor (AP) version of the Model 158, and multi-processor versions of the Models 158 and 168, were made available in 1976; these are the “-3” updates.

Games

Well thankfully there seems to have been some games....

Emulation

The 370 can be emulated by the following emulators:

See also

Further reading

  • Emerson W. Pugh, Lyle R. Johnson, John H. Palmer, IBM's 360 and Early 370 Systems, MIT Press, Cambridge, 1991

External link

Retrieved from "https://gunkies.org/w/index.php?title=IBM_System/370&oldid=34125"