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- W939948822 abstract "Interrupts are how hardware gets software's attention. Here's how they work. A computer cannot meet its requirements unless it communicates with its external devices. An interrupt is a communication gateway between the device and a processor. The allocation of an interrupt request line for a device and how the interrupt is handled play vital roles in device driver development. As the number of interrupt request lines in a system is limited, sharing an interrupt between devices is a must to access more devices. Any attempt to allocate an interrupt already in use, however, eventually crashes the system. This article explains the basics of the interrupt and the fundamentals of interrupt handling and includes an implementation of an interrupt request (IRQ) allocation for a character device. The purpose of any device is to do some useful job, and to do so it should communicate with the microprocessor. When a processor wants to communicate with a device, it sends instructions to the device controller. A device controller controls the operation of a device. Similarly, if a device wants to reply to a processor that says new data is ready to be retrieved, the devices generate an interrupt to capture the processor's attention. An interrupt is a hardware mechanism that enables a device to communicate with a processor." @default.
- W939948822 created "2016-06-24" @default.
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- W939948822 date "2005-01-01" @default.
- W939948822 modified "2023-09-28" @default.
- W939948822 title "Dynamic Interrupt Request Allocation for Device Drivers" @default.
- W939948822 hasPublicationYear "2005" @default.
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