Method and apparatus for managing interrupts in a data processin

Details Method and apparatus for managing interrupts in a data processin Method and apparatus for managing interrupts in a data processin

1996-02-08

1998-04-14

Ray, Gopal C.

39518401, G06F 946, G06F 1100

Patent

active

057404496

ABSTRACT:
A method and apparatus is provided for generating an interrupt signal in a data processing system, the interrupt signal being supplied to a control processor of the system to indicate the occurrence of any of a plurality of predetermined events in the system. The method and apparatus operate by: writing data to at least one memory location of a plurality of pairs of memory locations A, B of the system in dependence upon the event to be indicated, the pairs of memory locations A, B being predefined in the system for respective ones of the events; reading data from the pairs of memory locations A, B; processing the data read from each pair of memory locations A, B to generate interrupt data indicative of whether the associated event has occurred, and if so transmitting an interrupt signal to the control processor; and writing the interrupt data corresponding to the events to respective third memory locations C, the third memory locations C being predefined in the control processor. On receipt of an interrupt signal, the control processor reads the interrupt data in the third memory locations C to determine the event indicated by the interrupt signal.

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