Method and processor for selectively marking instructions as interruptible or uninterruptible and judging interrupt requests based on the marked instruction
US6029222A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3861
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Each of microcodes 1 has an interrupt prohibit bit 10 that specifies acceptance or nonacceptance of an interrupt request. Upon occurrence of an interrupt request, a processor refers to a value set in the interrupt prohibit bit 10 of the microcode 1 being currently executed. When "0" is set to the interrupt prohibit bit 10, the processor accepts the interrupt request, and when "1" is set to the interrupt prohibit bit 10, the processor rejects the interrupt request and starts executing a succeeding microcode. This allows the processor to safely execute certain instructions without interruption, as indicated by the interrupt prohibit bit 10 contained in the microcode 1 being currently executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.