Processor controlled DMA controller for transferring instruction and data from memory to coprocessor
US5001624A · kind A · utility
Inventors
Key dates
| Filing date | Jan 25, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Jan 25, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing system including a processor that executes a plurality of instructions including at least one instruction that requires an external operation to be performed. The processor provides information for this external operation instruction to an external device and continues to execute instructions that do not require the results from this external operation. The external device receives the information from the processor, performs the external operation and provides the results to the processor. A further aspect of this data processing system is an interface that is interconnected between the processor and the external device. The processor provides the external operation information to the interface. The interface in turn provides the information to the external device and concurrently accesses data from the memory that will be required by the external device for performing the external operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.