What is a port interrupt?

The situation where the execution of the program is suspended and the processor is forced to take care of the important event is called an interrupt. The interrupt request can be issued by a hardware built into the microcontroller, but can also be issued by an external hardware connected to a pin of a port.

What do you mean by interrupts?

An interrupt is a signal from a device attached to a computer or from a program within the computer that requires the operating system to stop and figure out what to do next. After the interrupt signal is sensed, the computer either resumes running the current program or begins running another program.

What is IRQ used for?

In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead.

Why do we need interrupt request?

Interrupts are important because they give the user better control over the computer. Without interrupts, a user may have to wait for a given application to have a higher priority over the CPU to be ran. This ensures that the CPU will deal with the process immediately.

Why are interrupts important?

What are interrupts and its types?

TYPES OF INTERRUPTS Maskable Interrupt: The hardware interrupts which can be delayed when a much highest priority interrupt has occurred to the processor. Non Maskable Interrupt: The hardware which cannot be delayed and should process by the processor immediately.

What is interrupt and its benefits?

Which IRQ does LPT1 commonly used?

IRQ Level	Common Use	Comments
4	COM1 or COM3
5	LPT2	This is usually free as not many people have 2 parallel ports. Sound blaster cards usually use this.
6	Floppy disk controller
7	LPT1	Sound blaster cards can use this