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What If the processor requests something from a device and the device is not ready?
Wiki User
∙ 12y ago
If said device is not ready, the CPU will perform other tasks as not to "hang" until the device enters ready state.
Wiki User
∙ 12y ago
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If the processor requests something from a device and the device is not ready the device issues a?
wait state!! :)
If a processor requests something from a device and the device is not ready what does the device do?
To sum this up there are 3 basic components to this equation, Operating system/Drivers/Hardware. The operating system would request a certain action to be carried out to the device using the processor as a means of processing the information being sent this would then communicate with the device driver which allows the operating system and hardware to run with each other, however if the device is not ready and there is an incoming process the device will simply not be able to pursue this action and nothing will happen. EDIT: Cyris69 The Device issues a "Wait State" http://en.wikipedia.org/wiki/Wait_state
What is the difference between polling and vector interrupt service routine?
polling interrupt is alternative to the vector interrupt , it requires that the interrupt handler poll or send a signal to each device in turn in order to find out which one is sent the interrupt request.....
What is definition of dispatcher in Operating system?
The dispatcher in Operating System is a module that selects the process from the ready queue for allotting it the CPU (Processor). There is a switch associated during dispatching and that is the process status changes from ready to running. The dispatcher is placed in between the ready queue and Processor Scheduler (i.e. short term scheduler).Rajiv
What is the meaning of INTA pin?
INTA stands for interrupt acknowledge. When it goes low, it asks the external device to get ready to place the type number onto the data bus. One device sends the interrupt request to the other device and when the other device is ready to accept that request , it sends the interrupt acknowledge to the device.
Is a network-ready device a device that may be attached to a network but still has to connect to a network computer first?
A network ready device is a device that has the potential to connect to a network, natively it isn't connected to a network, nor is it a network, but with the appropriate configuration and possibly with the addition of components could be connected.
What is the word that means to get something ready?
Prepare means to get ready.
What does ready mind mean?
you are ready to do something thats coming for you
What do you call the device you get at restaurants that vibrates and flashes when your table is ready?
pager
What are the three modes that a USB device can take on?
ready busy sleep
How can interrupt be generated?
when an i/o device is ready to do the process with cpu and the cpu not is not know the status of.. trhe i/o device,then i/o device sends a request to service it
How does IRQ priority works?
An IRQ is an electrical signal generated by a device needing attention. Usually, it means that some event has occurred such as data being received and ready to use. The IRQ signal is sometimes connected directly to the processor or in some cases to a dedicated interrupt handling circuit. When the processor is told the interrupt has happened it calls the ISR to handle it. The ISR is software that deals with the needs of the device that requested it. Usually, the device is read or some system action is taken to clear the condition that caused the IRQ then the interupt system is reset to make it ready for use again. On most systems, the IRQ signal forces the processor to save it's current program counter so it knows where to return when the ISR is finished, then it jumps to a hard-wired address called the Interrupt Vector where the code for the ISR is placed. At the end of the ISR, the program counter is restored and the program carries on from where it was before the interrupt paused it. Antonio Holl
