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A CPU generally handles an interrupt by executing an interrupt service routine?
By checking the interrupt register at fixed time intervals
What happens when interrupts comes?
Interrupt handler is responsible for following functions:- Determine the interrupt source. Determine the service routine to serve the interrupt source.
What is a TrapHandler?
A trap handler, also called an interrupt handler or interrupt service routine (ISR) is a program that executes when predefined events occur in a computer. There are software and hardware interrupts. An interrupt causes the computer's processor to stop running its current task and immediately run the trap handler to service the interrupt.
What is nested interrupt?
I believe a nested interrupt, is where an interrupt is allowed to occur (and thus is handled) during an already occurring Interupt service ruotine. I.E. First interrupt occurs ISR1 begins second Interrupt occurs ISR2 begins ISR2 Finishes ISR1 continues from where left off ISR1 finishes
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 interrupt acknowledge?
Interrupt acknowledge is the process of acknowledging a hardware interrupt, obtaining an interrupt vector address, and initiating the interrupt service routine in software. The INTA- (Interrupt Acknowledge) pin has the same timing as RD-, and external hardware is expected to provide an opcode in response to it. In the case of TRAP, RST7.5, RST6.5, and RST5.5, there is no specific interrupt acknowledge cycle like there is for INTR, but everything else is the same.
What happens when processor is attending an interrupt if it gets another interrupt?
The response to another interrupt request during servicing of an interrupt depends on the setting of the interrupt enable flag and/or the interrupt mask. If the interrupt service routine is thread safe, it will process correctly. More probably, problems will arise so the proper procedure is to either set the interrupt mask (8085) to not allow this or lower priority interrupts before reenabling interrupt, or to leave interrupts disabled until this iteration is complete. If interrupts are disabled or masked, a subsequent interrupt will be posted but not processed until the first is completed.
What is the process of a hardware device requesting service from the CPU?
This is known as an 'interrupt'. There is an extensive article explaining interrupts in detail here: http://en.wikipedia.org/wiki/Interrupt
What is the auto vectored interrupt?
An auto vectored interrupt is a type of interrupt handling mechanism in computer systems where the interrupting device can provide an automatic vector that points to the appropriate service routine. Rather than requiring the CPU to determine the address of the interrupt service routine (ISR) manually, the hardware generates a specific vector number based on the interrupt source. This allows for faster response times and simplifies the interrupt handling process, as the CPU can directly use the provided vector to locate the ISR. Auto vectored interrupts are commonly used in microcontrollers and embedded systems for efficient interrupt management.
How 8086 responds to an interrupt?
When the 8086 microprocessor receives an interrupt signal, it completes the execution of the current instruction and saves the address of the next instruction onto the stack. It then determines the appropriate interrupt vector from the Interrupt Vector Table (IVT) based on the interrupt type. The processor then transfers control to the interrupt service routine (ISR) associated with that interrupt. After the ISR has executed, the 8086 retrieves the saved address from the stack and resumes execution from where it was interrupted.
What is the deadline for a carrier to submit an invoice?
The deadline for a carrier to submit an invoice is typically within 30 to 60 days after the service has been provided.
How the interrupt bios function called?
In a computer, the interrupt BIOS function is typically called when a hardware or software interrupt occurs. This is done through specific interrupt vectors that point to the corresponding interrupt service routines (ISRs) in the BIOS. When an interrupt is triggered, the CPU halts its current operations, saves its state, and jumps to the address of the ISR defined for that specific interrupt. After the ISR completes its task, control is returned to the original program, restoring the CPU's state.
