Distributed reference and change table for a virtual memory system
US4916603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A distributed reference and change table 36 for a virtual memory system 10 has a number of storage locations at least equal to the maximum number of data blocks of an associated read/write physical memory. A memory module 24 has a plurality of data words organized into n number of data blocks. The memory module includes an integral reference and change table having at least n storage locations each having at least two bits, one bit indicating the occurrence of an access (reference) to a corresponding data block and the other bit indicating if the access was a write (or change) type of access. A plurality of such memory modules are physically and electrically coupled to a common memory carrier module, each of the plurality of memory modules having an integral reference and change table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.