Interrupt managing system for real-time operating system

Patent 5768599 Issued on June 16, 1998. Estimated Expiration Date:

February 27, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Simultaneous voice and data system using the existing two-wire inter-face
Patent #: 5214650
Issued on: 05/25/1993
Inventor: Renner, et al.

General I/O port interrupt mechanism
Patent #: 5448743
Issued on: 09/05/1995
Inventor: Gulick, et al.

Method for processing interrupt requests in a computer system operating environment having different types of supervisor programs concerned with specified types of interrupt events
Patent #: 5566334
Issued on: 10/15/1996
Inventor: Loader

Method and apparatus for switching between interrupt delivery mechanisms within a multi-processor system Patent #: 5619706
Issued on: 04/08/1997
Inventor: Young

Inventor

Yokomizo, Takashi

Assignee

NEC Corporation

Application

No. 607461 filed on 02/27/1996

US Classes:

710/260, INTERRUPT PROCESSING710/48, Input/Output interrupting710/49, Masking710/261, Multimode interrupt processing710/262, Interrupt inhibiting or masking710/265Variable

Examiners

Primary: Harvey, Jack B.
Assistant: Etienne, Ario

Attorney, Agent or Firm

Foley & Lardner

Foreign Patent References

2-220138 JP. 09/12/1990

International Class

G06F 013/24

Foreign Application Priority Data

1995-02-28 JP

Abstract

An interrupt managing system for a computer system in which resources are managed by a real-time operating system. The interrupt managing system has managed interrupt storage unit in which information regarding interrupts to be managed by the real-time operating system is stored, interrupt disabling processing unit for reading out the information stored in the managed interrupt storage unit and disabling an interrupt designated by the information in order to perform exclusive control needed for system call processing, and interrupt enabling processing unit for enabling the disabled interrupt. According to the interrupt managing system, an asynchronous interrupt which does not have an influence on the resource management by an OS is enabled even during a system call processing and an interrupt which does not issue a system call can be processed without any delay.