What is interrupt acknowledge signal?
interrupt acknowledge signal (IACK) An output signal that indicates an interrupt has been received and that the program counter is fetching the interrupt vector that forces the processor into the appropriate interrupt service routine.
What are the three types of interrupts?
Types of Interrupts
- Internal Interrupt.
- Software Interrupt.
- External Interrupt.
What is interrupt and DMA?
DMA is a hardware solution that allows blocks of data to be transferred between memory and an I/O device with no involvement of the CPU. It is often used in conjunction with interrupts, where one interrupt is generated for each block transferred rather than each byte transferred.
What is advantage of interrupt initiated i o?
The main advantage is reduced latency. The processor has to temporarily halt it’s work in programmed I/O, whereas in interrupt I/O, the processor continues to perform and only halts when interrupt is received. Another advantage: in programmed I/O, the system cannot be under two I/O transfers.
What is an interrupt input and output?
interrupt I/O A way of controlling input/output activity in which a peripheral or terminal that needs to make or receive a data transfer sends a signal that causes a program interrupt to be set. The processor polls the devices, in priority order, to identify the interrupting device.
What advantage does interrupts have over polling?
Advantages of Interrupt over Polling The first advantage is- the performance of microcontroller is far better in Interrupt method than Polling Method. In polling method, the microcontroller is checking continuously whether the device is ready or not, but the chances of data loss are greater in Polling than Interrupt.
Which is a part of interrupt request line?
Explanation: The Interrupt-request line is a control line along which the device is allowed to send the interrupt signal. Explanation: The Processor after servicing the interrupts as to load the address of the previous process and this address is stored in the stack.
Which of the following single is used to acknowledge interrupt request?
Explanation: In daisy chaining since there is only one request line and only one acknowledge line, the acknowledge signal passes from device to device until the one with the interrupt is found.
Which interrupt has the highest priority?
TRAP
What causes an interrupt to happen?
Software interrupts A software interrupt may be intentionally caused by executing a special instruction which, by design, invokes an interrupt when executed. Software interrupts may also be unexpectedly triggered by program execution errors. These interrupts typically are called traps or exceptions.