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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.
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∙ 12y ago
In programmed IO, the CPU continuously polls the IO device to check if it is ready for data transfer. This method is inefficient as it wastes CPU cycles. In interrupt IO, the IO device itself interrupts the CPU when it is ready for data transfer, allowing the CPU to perform other tasks in the meantime, thus improving efficiency.
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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.
Is Io a dwarf planet?
No, Io is not a dwarf planet. Io is actually one of the four largest moons of Jupiter. It is the most volcanically active body in our solar system due to the tidal forces between it and Jupiter.
What are Jupiter's four largest moons how are they different from each other?
Jupiter's four largest moons are Io, Europa, Ganymede, and Callisto. They are different in terms of their surface features and composition. For example, Io has active volcanoes, Europa has a frozen surface with potential subsurface ocean, Ganymede is the largest moon and has its own magnetic field, and Callisto has a heavily cratered surface.
Which one is most important in explaining the tremendous tidal heating that occurs on Io?
The interaction between Io's gravitational forces with Jupiter and the other Galilean moons is the most important factor in explaining the tremendous tidal heating on Io. The strong gravitational tug from Jupiter and the neighboring moons cause tremendous tidal forces that generate heat within Io, leading to its intense volcanic activity.
When was Io canto created?
Io canto was created on 2006-11-10.
What is the advantage and disadvantage of interrupt in memory mapped IO?
disadvantages of interrupt
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.
List and briefly define three techniques for IO operations?
Blocking IO: The program will pause and wait until the IO operation is complete before resuming. This technique can lead to inefficiency if there are multiple IO operations. Non-blocking IO: The program continues to run while waiting for the IO operation to complete. This allows for better efficiency when handling multiple IO operations simultaneously. Asynchronous IO: The program initiates the IO operation and continues executing, without waiting for the operation to complete. A callback function is usually provided to handle the result once it is available. This allows for better performance in handling large numbers of IO operations.
What is the difference between il and lo in Italian lo with an l not an I as in lard?
il means the and io means I
How do you xxplain how DMA offers an improvement over CPU programmed IO?
It offloads actual IO processing from CPU to the device hardware. This frequently allows the IO device to perform its operations on cycles that the CPU could not have made use of anyway, resulting in a double benefit.
What is Difference between 8155 and 8255 microprocessor?
Neither the 8155 nor the 8255 are considered to be microprocessors. The 8155 is an integrated RAM, IO, and Timer device designed for the 8085. The 8255 is an Programmable IO controller.
What is the relation between Perseus and Io in Greek mythology?
Io is an ancestor to Perseus
What happens if both CPU and IO devices want to access the bus at the same time?
Maybe you have seen something called an interrupt as you work on your computer. These Interrupt Requests come from processes or devices that want to use resources. It's all very orderly.
What is the difference between synchronous IO and asynchronous IO?
If a process requests that the O/S write data to disk, and has to wait for it to be written before continuing, then that is Synchronous. If the process does not have to wait for the write to be completed, that is Asynchronous. Synchronous is real-time.
Differentiate between memory mapped IO and IO mapped IO?
Memory mapped IO involves using memory addresses to access IO devices, treating them as if they were memory locations. IO mapped IO involves using separate IO addresses distinct from memory addresses to access IO devices. Memory mapped IO simplifies programming and can improve performance, while IO mapped IO offers better separation between memory and IO devices.
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.
Difference between batch operating system and multiprogrammed operating system?
multiprogramming-there is no way for single user to keep either cpu or the io divices busy at all times...
