Interrupt Service Routine. A software program that is engaged by an interrupt. This program typically performs a specific time-sensitive function and then returns control of the computer to the original application or program.
Interrupt Service Routine -- a routine responsible for servicing hardware (e.g. reading and/or writing some device ports), for updating some data structures shared between the ISR and the thread(s) running in the application, and for signalling the thread that some kind of event has occurred.
nterrupt ervice outine, the function in each device driver that gets called when an interrupt happens.
Interrupt Service Routine. Code that performs actions necessary to deal with the condition that caused the interrupt.
Interrupt service routine. Routine that processes a service interrupt before returning control to the suspended process.