Transfer control technique between two units included in a data processing system
US4225921A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Oct 2, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4239
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing unit's request to a data processing device for the transfer of control and processing of an operation in response to an instruction from the unit, is stalled by the device, dependent on the type of instruction, for a period of time, also dependent on the type of instruction, until the device is ready to process such operation. A shift register arrangement is used in the device, which, dependent on the indicia stored therein, which indicia are appropriately loaded in such register dependent on the type of instruction, is used to delay a response to the unit by requesting the unit to make another request to the device to process the operation called for by the instruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.