The DICT Development Group

Search for:
Search type:

Database copyright information
Server information

1 definition found
 for interrupts
From The Free On-line Dictionary of Computing (30 December 2018) :

      1. An asynchronous event that suspends normal
     processing and temporarily diverts the flow of control
     through an "{interrupt handler" routine.
     Interrupts may be caused by both hardware (I/O, timer,
     machine check) and software (supervisor, system call or
     trap instruction).
     In general the computer responds to an interrupt by storing
     the information about the current state of the running
     program; storing information to identify the source of the
     interrupt; and invoking a first-level interrupt handler.
     This is usually a kernel level privileged process that can
     discover the precise cause of the interrupt (e.g. if several
     devices share one interrupt) and what must be done to keep
     operating system tables (such as the process table) updated.
     This first-level handler may then call another handler,
     e.g. one associated with the particular device which generated
     the interrupt.
     MS-DOS,+nearly+synonymous+with+"{system+call">2. Under MS-DOS, nearly synonymous with "{system call"
     because the OS and BIOS routines are both called using the
     INT instruction (see interrupt list) and because programmers
     so often have to bypass the operating system (going directly
     to a BIOS interrupt) to get reasonable performance.
     [{Jargon File]

Contact=webmaster@dict.org Specification=RFC 2229