Processor I/O and interrupt filters allowing a co-processor to run software unknown to the main processor
US4695945A · kind A · utility
65Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1985 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Feb 28, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/161
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A co-processor is connectable to a main system data bus to run software unknown to the main processor. The main processor can concurrently run other software and maintains priority over shared I/O facilities by providing trapping logic incorporated in a random access memory and dynamically loadable by the master processor which contains data related to the current useability by the co-processor of a shared I/O device. Additional logic is associated with the co-processor to manage interrupts between the co-processor and the system bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.