IBM System/370

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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Model Announced Shipped Withdrawn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:

Further reading

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

External link