What is the difference between maskable and non maskable interrupt

Furthermore, interrupts occur asynchronously. Maskable and non-maskable interrupts are two types of interrupts. What is Maskable Interrupt — Definition, Functionality 2.

Maskable interrupts are the interrupts that the processor can deny. Therefore, these interrupts help in managing low priority tasks. Moreover, RST6. Usually, it indicates a non-recoverable hardware error. Non-maskable interrupts help when response time is critical or when it is not possible to disable normal system operations.

Modern computer systems use this type of interrupt to handle non-recoverable errors which need immediate attention. The main difference between maskable and non maskable interrupt is that maskable interrupt can be disabled or ignored by the CPU while non-maskable interrupt cannot be disabled or ignored by the CPU. That is to say, it may be ignored.

Usually there are standard interrupt masking techniques for every processor, so that it may not be interrupted while performing some crucial task. Maskable interrupts can be ignored using these methods. In computing, a non-maskable interrupt NMI is a hardware interrupt that standard interrupt-masking techniques in the system cannot ignore. It typically occurs to signal attention for non-recoverable hardware errors. Common examples of non-maskable interrupt include types of internal system chipset errors, memory corruption problems, parity errors and high-level errors needing immediate attention.

In a sense, a non-maskable interrupt is a way to prioritize certain signals within the operating system. Hardware interrupts can be classified into two types they are. 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. Such uses include reporting non-recoverable hardware errors, system debugging and profiling and handling of species cases like system resets.

TRAP is an example of non-maskable interrupt; it consists of both level as well as edge triggering and is used in critical power failure conditions.

Viva Differences. Comments are closed. Maskable interrupt is a hardware Interrupt that can be disabled or ignored by the instructions of CPU.