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If the process doenload was just interrupted has used up its time quantum, and there is some other runnable process, then the scheduler “returns” to that other process. Retrieved from ” https: Wikipedia has related information at Interrupt Many pieces of hardware send interrupt signals to the CPU.

The hardware such as a video display signals it is ready for the next piece of data, the interrupt handler sends out the next piece of data, then returns to the process that was interrupted. The hardware such as a keyboard interrupt in operating system pdf download that it has a piece of data available, the interrupt handler reads downlad that piece of data, then returns to the process that was interrupted.

Software interrupts cause a context switch to an interrupt handler similar to a hardware interrupt. Some interrupt handler software might reset the machine, or just display the error, but most interrupt handlers do one of 3 innterrupt.

Wikipedia has related information at Interrupt. From Wikibooks, open books for an open world.

Operating System Design/Processes/Interrupt

In other languages Add links. Perhaps the most important interrupt for operating system design is the “timer interrupt”, which is emitted at regular intervals by a timer chip. A software interrupt, also sysem a processor generated interrupt, is generated by the processor executing a specific instruction. Policies and guidelines Contact us.

The CPU then executes code for a key interrupt, which typically displays a ldf on a screen or performs a task. Later, when the timer interrupts some other process, the scheduler will “return” to this process.

01 | Booting | System Software

For example, when a user type into a keyboard, interrupt in operating system pdf download keyboard sends a key interrupt. Some interrupt handler software might reset the machine, or just display the error, but most interrupt handlers do one of 3 things: By using this site, you agree to the Terms of Use and Downloaad Policy.

Many pieces of hardware send interrupt signals to the CPU.

Views Read Edit View history. The timer interrupt operatiing runs the OS scheduler. Common processor-generated-interrupts are the divide-by-zero exception and the general-fault or page-fault exception. This page was last edited on 17 Septemberat