公开(公告)号：DE69023018D1

公开(公告)日：1995-11-23

申请号：DE69023018

申请日：1990-02-06

Applicant: IBM

Inventor： CHANG TAI-LIN ,  HUNTER PAUL WAYNE ,  LANG DONALD JOHN ,  LUNING STEPHEN GOUZE

IPC: G06F9/48 ,  G06F13/26

Abstract: In a programmed machine, such as an peripheral controller, programmed operations are executed in a one of several operational contexts. Each context may be initiated by a corresponding interruption signal. Any context which has been activated remains active until quiesced by program execution. One of the active contexts is a current context in which all instruction executions are currently occurring. In each cycle of the programmed machine, all active contexts and received and stored interruption signals, each for respective ones of the contexts, are compared to find the context highest priority context. Such highest priority context is compared with the current context priority for determining whether or not the programmed machine should change current contexts.

公开(公告)号：DE69023018T2

公开(公告)日：1996-05-30

申请号：DE69023018

申请日：1990-02-06

Applicant: IBM

Inventor： CHANG TAI-LIN ,  HUNTER PAUL WAYNE ,  LANG DONALD JOHN ,  LUNING STEPHEN GOUZE

IPC: G06F9/48 ,  G06F13/26

Abstract: In a programmed machine, such as an peripheral controller, programmed operations are executed in a one of several operational contexts. Each context may be initiated by a corresponding interruption signal. Any context which has been activated remains active until quiesced by program execution. One of the active contexts is a current context in which all instruction executions are currently occurring. In each cycle of the programmed machine, all active contexts and received and stored interruption signals, each for respective ones of the contexts, are compared to find the context highest priority context. Such highest priority context is compared with the current context priority for determining whether or not the programmed machine should change current contexts.