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. How does the CPU know when the memory operation is completed?

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Tyrel Wiegand

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3y ago

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Difference between programmed IO and interrupt IO?

1.Programmed IO is the process of IO instruction written in computer program , where Interrupt Initiated IO is done by using interrupt and some special command. 2.The advantage of Interrupt Initiated IO is ,it is a time consuming process than Programmed IO. 3.In Programmed IO technique to transfer data,required constant motoring on peripheral by CPU,once data transfer is initiated, CPU have to wait for next transfer. In Interrupt Initiated IO once data transfer initiated ,CPU execute next program without wasting time and the interface keep monitoring the device. When the interface determines that the device is ready to transfer data, it generate an interrupt request,CPU stop the current task,execute the transferring process,and then return to the previous on-processing task.


What transfer mode can transmit data from a device to memory without involving the CPU?

DMA transfer mode


Which transfer mode can transmit data from a device to memory without involving the cpu?

DMA


What is the main characteristic of Programmed IO?

Programmed IO requires the CPU to manually transfer data between a device and memory. The CPU must constantly check the status of the device to determine when data can be transferred. It is a simple and efficient method but can result in high CPU utilization and slow transfer speeds.


Why CPU is not called as peripheral device?

what are cpu device


Block diagram of 8257 dma controller?

it is a device to transfer the data directly between io device and memory without through the cpu so it performs a high-speed data transfer between memory and io device


Why Direct memory access has priority over the CPU when both request a memory transfer?

Direct Memory Access (DMA) has priority over the CPU when both request a memory transfer because DMA can access memory independently of the CPU, allowing for simultaneous data transfers. This reduces the burden on the CPU and improves overall system performance. Additionally, DMA transfers are typically faster and more efficient than CPU transfers, making them a preferred choice for handling memory transfers.


How Memory interface with CPU indicate the direction of signal and control signals?

How Memory interface with CPU indicate the direction of signal and control signals?


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


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


Is a CPU a software or hardware device?

No. A CPU is hardware.