interrupt service routine in a sentence

Examples

1. The NMI service routines first vector through $ FFFA hex / 65530 dec which determines the cause and then transfers control to the interrupt service routine.
2. This definition originates from single-threaded programming environments where the flow of control could be interrupted by a hardware interrupt and transferred to an interrupt service routine ( ISR ).
3. Hence, interrupt service routines are limited in the actions they can perform; for instance, they are usually restricted from accessing the file system and sometimes even from allocating memory.
4. The concept of context assumes significance in the case of interruptible tasks, wherein, upon being interrupted, the processor saves the context and proceeds to serve the interrupt service routine.
5. The address of the interrupt service routine ( ISR ) is read from the interrupt vector table and loaded to the IP register, and the ISR is executed as a consequence.
6. The interrupt service routine can then run specific display or graphics software to modify data in the video home computers and video game consoles that relied upon a central microprocessor to generate text or graphic displays.
7. The first word of the interrupt vector contains the address of the interrupt service routine and the second word the value to be loaded into the PSW ( priority level ) on entry to the service routine.
8. Without extra arrangements to protect the return address, Re-entrancy was problematic for the same reason : An interrupt service routine must refrain from calling any subprogram that might have been the code that was interrupted.
9. The stored address is called before or after the TSR has received the interrupt and has finished its processing, in effect forming a singly linked list of interrupt handlers, also called " interrupt service routines ", or ISRs.
10. For example, a function could be wrapped all around with a mutex ( which avoids problems in multithreading environments ), but if that function is used in an interrupt service routine, it could starve waiting for the first execution to release the mutex.