Mechanism for control of address translation by a program using a plurality of translation tables
US4500952A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1980 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
One program in one address space is permitted to obtain access to data in another address space or to call a program in another address space without invoking a supervisor. Each of a plurality of address spaces assigned an Address Space Number (ASN) has an associated set of address translation tables. A second address space can be designated by a program, and when authorized, can cause transfer of data in main memory from one physical location to another associated with the different address space. A program changeable space selection control bit controls use of two different sets of address translation tables associated with two different address spaces. Without invoking a supervisor, a particular program in an assigned address space can call a program in another address space or obtain addressability to data in another address space having an associated set of address translation tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.