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A device gets the CPU's attention through interrupts, which are signals sent to the processor indicating that it requires immediate attention. When a device needs to communicate or request service, it sends an interrupt request (IRQ) to the CPU. The CPU then pauses its current tasks, saves its state, and addresses the interrupt by executing the corresponding interrupt handler. Once the interrupt is serviced, the CPU resumes its previous tasks.
What else can I help you with?
When a device needs the CPU to perform a task what does it need to do?
The device needs to signal the CPU to get its attention. It typically does this through an interrupt request line (IRQ).
Which line will be activated when an output device require attention from CPU?
The interrupt line, of course.
A line of a motherboard bus that a hardware device or expansion slot can use to signal a CPU that the device needs attention is called?
IRQ
Why is interrupt driven IO better then polling?
Polling checks constantly the status of de I/O device, wasting CPU cycles. However with Interrupt driven I/O the device sends a request to the CPU to indicate that it needs attention. So, in some cases, Interrupt driven I/O will be better than polling, because doesn't waste CPU cycles checking when the device needs attention.
Why CPU is not called as peripheral device?
what are cpu device
Would a CPU be a processing device?
Yes, the CPU itself is a processing device, it is the "brain" of the computer. CPU = Central *Processing* Unit
What is the performance advantage in having device drivers and devices synchronize by means of device interrupts?
Using device interrupts for synchronization between device drivers and devices enhances performance by allowing the CPU to execute other tasks instead of polling for device readiness. This event-driven approach reduces CPU usage and latency, as the CPU can respond instantly when an interrupt signals that the device requires attention. Consequently, it improves overall system efficiency, enabling better multitasking and responsiveness in applications.
Which is not a peripheral device webcam external hard drive CPU or keyboard?
CPU is not a peripheral device.
What are the components of computer hardware?
Ram, cpu, storage device, output device, input device, communication device
What a peripheral device generates when it needs immediate attention from operating system?
When a peripheral device needs immediate attention from the operating system, it generates an interrupt signal. This signal notifies the CPU that the device requires processing, prompting the OS to pause its current tasks and address the request. The OS then determines the appropriate action to take, such as reading data from the device or handling an error. This mechanism allows for efficient and timely communication between the CPU and peripheral devices.
What do you mean polling of 8085?
Polling in the context of the 8085 microprocessor refers to the method of checking the status of an external device or peripheral by the CPU at regular intervals. Instead of waiting for an interrupt signal from the device, the CPU actively queries the device to determine if it requires attention or has data to send. This method can lead to inefficient CPU usage, as it consumes processor cycles while checking devices that may not need servicing. Polling is often contrasted with interrupt-driven I/O, where the device signals the CPU when it needs to communicate.
Is a CPU a software or hardware device?
No. A CPU is hardware.
