Processor command for prompting a storage controller to write a day clock value to specified memory location
US5809540A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/835
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for efficiently reading a day clock and storing the value into main storage. An advantage is that the memory storage command can request the main storage control to read a current day clock value and store the value into a main storage location specified by the requesting processor while allowing the requesting processor to continue processing other commands. A further advantage is that the requesting processor does not have to wait for the return of a day clock value or the generation of a main storage write request which may reduce the number of main storage I/O bus requests and bus transfer cycles over that normally required to transfer the day clock value to the requesting processor and then back to main storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.