Apparatus for storing modifying data prior to selectively storing data to be modified into a register
US4896259A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1987 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Nov 30, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3824
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data reading and modifying device of a computer system has a main storage for storing first data, portions of which are to be modified by various modifying data. The access speed of the main storage is slower than the speed at which the modifying data is accessed. A controller initiates fetches of first data from the main store and selects the modifying data. A register is coupled to the main storage for receiving and storing first data as it is provided from the main storage. Portions of the register are reserved for modifying data which is preferably inserted into the register before receipt of the first data as controlled by the controller. The first data received from the main storage is inserted into remaining portions of the register and insertion of, first data into portions reserved for modifying data is inhibited, such that modified data is available without a write back to the main storage location of the data to be modified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.