IBM System/370: Difference between revisions
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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]] | ||
The '''System/370''' continued the tradition of the prior [[System/360]] by expanding the instruction set, and adding the new ability of virtualization. | 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]]. | The System/370 was supplanted by the [[S/390]]. | ||
== Specs == | == Specs == | ||
*24 bit address space for a maximum 16MB of RAM. | *Sixteen 32-bit control [[register]]s, in supervisor mode only | ||
*Sixteen 32-bit [[general purpose register]]s | |||
*Four 64-bit [[floating point]] registers (could be paired as two 128-bit floating point registers) | |||
*24 bit [[address space]] for a maximum 16MB of RAM (later models: 31 bits) | |||
==Models== | |||
{| class="wikitable" | |||
! 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 Withdrawn | |||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 == | == Games == | ||
| Line 13: | Line 62: | ||
== Emulation == | == Emulation == | ||
The 370 can be emulated by the following emulators: | The 370 can be emulated by the following emulators: | ||
* [[Hercules]] | |||
* [[PC/370]] | |||
{{semi-stub}} | |||
==See also== | |||
* [[IBM I/O channel]] | |||
==Further reading== | |||
* Emerson W. Pugh, Lyle R. Johnson, John H. Palmer, ''IBM's 360 and Early 370 Systems'', MIT Press, Cambridge, 1991 | |||
==External link== | |||
* [https://web.archive.org/web/20180403200553/https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_FS370.html System/370 - Dates and characteristics] | |||
[[Category: IBM Mainframes]] | |||
[[Category:IBM | |||
Latest revision as of 12:42, 28 October 2024
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
- Sixteen 32-bit control registers, in supervisor mode only
- Sixteen 32-bit general purpose registers
- Four 64-bit floating point registers (could be paired as two 128-bit floating point registers)
- 24 bit address space for a maximum 16MB of RAM (later models: 31 bits)
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
